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Task

This markdown file reads previously created temperature climatology file and uses that as the definition of the depth levels that the Argo temperature data should be aligned to. As the climatology is based on pressure it is first aligned to standard depths. Previously created annual data files (yyyy_core_data_temp.rds), metadata (yyyy_core_metadata.rds) and fileid (core_fileid.rds) files are loaded from the core preprocessed folder.

Base data qc flags are checked to ensure that the float position, pressure measurements and temperature measurements are good. Pressure is used to derive the depth of each measurement. The temperature profile is checked to ensure that significant gaps (specified by the opt_gap_limit, opt_gap_min_depth and opt_gap_max_depth) do not exist. Profiles are assigned a profile_range field that identifies the depth 1 = 600 m, 2 = 1200 m and 3 = 1500 m.

The float temperature profiles are then aligned using the spline function to match the depth levels of the climatology resulting in data frame temp_core_va. An anomaly file is then created from the vertically aligned profiles and climatology.

Dependencies

yyyy_core_data_temp.rds, yyyy_core_metadata.rds, core_fileid.rds - core preprocessed folder created by load_argo_core.

temp_clim_va.rds - BGC preprocessed folder created by temp_align_climatology.

Outputs (Core preprocessed folder)

temp_core_va.rds – vertically aligned temperature profiles.

temp_clim_va.rds – climatology temperature profiles.

temp_clim_va_interpol.rds - interpolated climatology temperature profiles.

temp_anomaly_va.rds – anomaly temperature profiles.

Set directories

location of pre-prepared data

Set options

Define options that are used to determine profiles that we will us in the ongoing analysis

# Options

# opt_profile_depth_range
# The profile must have at least one temperature reading at a depth <= opt_profile_depth_range[1, ]
# The profile must have at least one temperature reading at a depth >= opt_profile_depth_range[2, ].
# In addition if the profile depth does not exceed the min(opt_profile_depth_range[2, ]) (i.e. 600) it will be removed.
profile_range <- c(1, 2, 3)
min_depth <- c(5.0, 5.0, 5.0)
max_depth <- c(600, 1200, 1500)
opt_profile_depth_range <- data.frame(profile_range, min_depth, max_depth)

# The profile should not have a gap greater that opt_gap_limit within the range defined by opt_gap_min_depth and opt_gap_max_depth
opt_gap_limit <- c(28, 55, 110)
opt_gap_min_depth <- c(0, 400, 1000)
opt_gap_max_depth <- c(400, 1000, 1500)

# year to be refreshed are set by opt_min_year and opt_max_year
opt_min_year = 2013
opt_max_year = 2023

# opt_measure_label, opt_xlim and opt_xbreaks are associated with formatting
opt_measure_label <- "temperature anomaly (°C)"
opt_xlim <- c(-4.5, 4.5)
opt_xbreaks <- c(-4, -2, 0, 2, 4)

# opt_exclude_shallower
# This option will exclude depths from the climatology and subsequent vertically aligned data that are shallower than opt_exclude_shallower.
# e.g. set to 4.5 to ensure that the top depth of 0.0 m is excluded
# Set to 0.0 to ensure no depths are excluded.
opt_exclude_shallower <- 4.5

Read climatology

Temperature climatology has been prepared during BGC analysis

# Read climatology -- target depths
temp_clim_va <- read_rds(file = paste0(path_argo_preprocessed, "/temp_clim_va.rds"))

target_depth_levels <- unique(temp_clim_va[c("depth")])
target_depth_levels <- target_depth_levels %>% select(target_depth = depth)

# Exclude 0.0 m depth from the climatology and target_depth_levels
target_depth_levels <- target_depth_levels %>% filter(target_depth > opt_exclude_shallower)

Climatology temporal interpolation

#----Climatology temporal interpolation----
latitudes<-unique(temp_clim_va$lat) #range=-90°/90° -> values in range 
longitudes<-unique(temp_clim_va$lon) #range=20.5°/379.5°-> shift of 20° so the maps are cut off through Cape Town

clim_interpolation=FALSE #to perform or not the climatology interpolation (once file written, no need to compute again)

if (clim_interpolation){
  print("Computing climatology temporal interpolation")
  #Reduce clim dataset in chunk (for each (lat, lon, depth) pair) for efficient computation
  chunks_data<- temp_clim_va %>%
    group_split(lat, lon, depth)
  
  #Defining day of the year 
  day_months<- c(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31)
  month<-c(1:12)
  day_of_year <- sapply(month, function(m) {
    1:day_months[m] + cumsum(c(0, day_months))[m]}) 
  day_of_year <- data.frame(month = rep(month, times = day_months),
                             day = unlist(sapply(day_months, seq_len)),
                             day_of_year = unlist(day_of_year))
  
  
  #New daily dataframe with interpolated data (1 temperature value per day instead of 1 per month)
  process_chunk <- function(chunk) {
    #Extension of monthly to daily dataset -- Each 15th of each month, we have a climatology temp value and otherwise NA
    expanded_clim <- day_of_year %>%
      left_join(chunk, by = c("month")) %>%
      mutate(clim_temp = ifelse(day != 15, NA, clim_temp))
  
    #--SPLINE interpolation for all NA values of a location, i.e of each chunk 
    temp_climato_interpolated_spline <- expanded_clim %>%
      mutate(interpolated_temp = spline(x = day_of_year, y = clim_temp,
                                      xout = day_of_year, method = "natural")$y)%>%
      ungroup()
  
      
    #Return processed chunk
    return(temp_climato_interpolated_spline)
  }
  
  processed_chunks <- bind_rows(mclapply(chunks_data, process_chunk)) #Computation in parallel - computation time ~1h!
  processed_chunks <- processed_chunks %>%
  filter(!is.na(lat) & !is.na(lon))
  
  # Write interpolated data
  processed_chunks %>%
  write_rds(file = paste0(path_argo_preprocessed, "/temp_clim_va_interpol.rds"))
  
  }else{
    print("Reading climatology temporal interpolation")
    #Read interpolated climatology data for anomaly computation
    processed_chunks <- read_rds(file=paste0(path_argo_preprocessed, "/", "temp_clim_va_interpol.rds"))
}

[1] "Reading climatology temporal interpolation"

#--Plots--
#Chosen location for visualisation
temp_test_interpol<-processed_chunks%>%
  filter(lat==unique(processed_chunks$lat)[2], lon==unique(processed_chunks$lon)[2])

month_labels <- month.abb  #months abbreviations for x-labels

plt_depth=c(5, 400, 1100)

# --BEFORE interpolation
monthly_temp_test_interpol <- temp_test_interpol[!is.na(temp_test_interpol$clim_temp), ]
before_interpolation <- ggplot(monthly_temp_test_interpol[monthly_temp_test_interpol$depth %in% plt_depth, ], aes(x = month, y = clim_temp, color = as.factor(depth))) +
  geom_point() +
  geom_step() +
  labs(x = "Month", y = "Temperature",
       title = paste("Climatology BEFORE interpolation")) +
  scale_x_continuous(breaks = unique(temp_test_interpol$month),  labels= month_labels) +
  scale_color_discrete(name = "Depth")+
    facet_wrap(~ lat + lon, ncol = 2)
rm(monthly_temp_test_interpol)

# --SPLINE
spline_interpolation <- ggplot(temp_test_interpol[temp_test_interpol$depth %in% plt_depth, ], aes(x=day_of_year, y=interpolated_temp, color = as.factor(depth)))+
  geom_point()+
  labs(x= "Day of the year", y="Temperature", title =paste("Climatology AFTER (spline) interpolation"))+
  scale_x_continuous(breaks = unique(temp_test_interpol$day_of_year[which(temp_test_interpol$day %% 31 == 1)]), labels= month_labels)+
    scale_color_discrete(name = "Depth")+
    facet_wrap(~ lat + lon, ncol = 2)

combined_plot <- grid.arrange(before_interpolation, spline_interpolation, ncol = 2)

Version	Author	Date
99a9a20	mlarriere	2024-06-05
427aad7	mlarriere	2024-04-08
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29

print(combined_plot)

TableGrob (1 x 2) "arrange": 2 grobs
  z     cells    name           grob
1 1 (1-1,1-1) arrange gtable[layout]
2 2 (1-1,2-2) arrange gtable[layout]

# Clean repository
rm(day_of_year, chunks_data)
gc()

             used    (Mb) gc trigger    (Mb)   max used    (Mb)
Ncells    1562044    83.5    2462557   131.6    2462557   131.6
Vcells 4778818379 36459.5 7772185397 59297.1 7412024726 56549.3

Prepare years

Read annual core temperature and metadata file. Validate profile against limits and align to target_depth_range

for (target_year in opt_min_year:opt_max_year) {
  
  # target_year <- 2023
  cat('year being processed:', target_year, '\n')

  # --------------------------------------------------------------------------------
  # Read data
  # --------------------------------------------------------------------------------
  # base data and associated metadata
  core_data <- read_rds(file = paste0(path_core_preprocessed, "/", target_year, "_core_data_temp.rds"))
  core_metadata <- read_rds(file =  paste0(path_core_preprocessed, "/", target_year,  "_core_metadata.rds"))
  
  #-----contain (North Atlantic Ocean - east coast) coriolis/6903067/profiles/R6903067_079.nc, coriolis/7900545/profiles/D7900545_127.nc
  core_fileid <- read_rds(file = paste0(path_core_preprocessed, "/core_fileid.rds"))

  # Replace file with file_id
  core_metadata <- full_join(core_metadata, core_fileid)
  core_metadata <- core_metadata %>%
    select(-c(file))
  core_data <- full_join(core_data, core_fileid)
  core_data <- core_data %>%
    select(-c(file))

  # Select relevant field from metadata ready to join to core_data
  core_metadata_select <- core_metadata %>%
    filter(position_qc == 1) %>%
    select(file_id,
           date,
           lat,
           lon) %>%
    mutate(year = year(date),
           month = month(date),
           .after = date)
  
  # we only want pressure and temperature data
  # conditions 
  # !is.na(depth) - pressure value must be present
  # !is.na(temp_adjusted) - temperature value must be present
  # pres_adjusted_qc %in% c(1, 8), temp_adjusted_qc %in% c(1, 8) and n_prof == 1 has been applied in load process
  core_data_temp <- core_data %>%
    filter(!is.na(depth) & !is.na(temp_adjusted)) %>%
    select(file_id,
           depth,
           temp_adjusted)
  
  # # join with metadata information and calculate depth field
  # core_data_temp <-
  #   inner_join(core_metadata_select %>% select(file_id, lat),
  #              core_data_temp) %>%
  #   select(-c(lat, pres_adjusted))
  
  # # ensure we have a depth, and temp_adjusted for all rows in bgc_data_temp
  # core_data_temp <- core_data_temp %>%
  #   filter(!is.na(depth) & !is.na(temp_adjusted))
  
  
  # clean up working tables
  rm(core_data, core_metadata)
  gc()
  
  # --------------------------------------------------------------------------------
  # Profile limits
  # --------------------------------------------------------------------------------
  
  # Apply the rules that are determined by options set in set_options.
  # Profile must cover a set range and not contain gaps.
  
  # Determine profile min and max depths
  core_profile_limits <- core_data_temp %>%
    group_by(file_id) %>%
    summarise(
      min_depth = min(depth),
      max_depth = max(depth),
    ) %>%
    ungroup()

  # The profile much match at least one of teh range criteria
  force_min <- min(opt_profile_depth_range$min_depth)
  force_max <- min(opt_profile_depth_range$max_depth)
  
  # Apply profile min and max restrictions
  core_apply_limits <- core_profile_limits %>%
    filter(
      min_depth <= force_min &
      max_depth >= force_max
      )
  
  # Ensure working data set only contains profiles that have confrormed to the range test
  core_data_temp <- right_join(core_data_temp,
                               core_apply_limits %>% select(file_id))
  
  # Add profile type field and set all to 1.  
  # All profile that meet the minimum requirements are profile_range = 1
  core_data_temp <- core_data_temp %>%
    mutate(profile_range = 1)
  
  for (i in 2:nrow(opt_profile_depth_range)) {
    # i = 3
    range_min <- opt_profile_depth_range[i,'min_depth']
    range_max <- opt_profile_depth_range[i,'max_depth']
    
    # Apply profile min and max restrictions
    core_apply_limits <- core_profile_limits %>%
      filter(min_depth <= range_min &
               max_depth >= range_max) %>%
      select(file_id) %>%
      mutate (profile_range = i)
  
    # Update profile range to i for these profiles
    # core_data_temp <- full_join(core_data_temp, core_apply_limits) %>%
    #                         filter(!is.na(min_depth))
    core_data_temp <-
      core_data_temp %>% rows_update(core_apply_limits, by = "file_id")
  
  }

  # Find the gaps within the profiles
  profile_gaps <- full_join(core_data_temp,
                            opt_profile_depth_range) %>%
    filter(depth >= min_depth &
             depth <= max_depth) %>%
    select(file_id,
           depth) %>%
    arrange(file_id, depth) %>%
    group_by(file_id) %>%
    mutate(gap = depth - lag(depth, default = 0)) %>%
    ungroup()
  
  # Ensure we do not have gaps in the profile that invalidate it 
  for (i_gap in opt_gap_limit) {
    # The limits to be applied in that pass of for loop
    # i_gap <- opt_gap_limit[3]
    i_gap_min = opt_gap_min_depth[which(opt_gap_limit == i_gap)]
    i_gap_max = opt_gap_max_depth[which(opt_gap_limit == i_gap)]
    
    # Which gaps are greater than i_gap
    profile_gaps_remove <- profile_gaps %>%
      filter(gap > i_gap) %>%
      filter(depth >= i_gap_min & depth <= i_gap_max) %>%
      distinct(file_id) %>% 
      pull()
    
    # Remove gap-containing profiles from working data set
    core_data_temp <- core_data_temp %>% 
      filter(!file_id %in% profile_gaps_remove)
  }

  # clean up working tables
  rm(core_apply_limits, core_profile_limits, profile_gaps, profile_gaps_remove)
  gc()
  
  # create df that contains the observations prior to vertical alignment 
  core_data_temp_full <- left_join(core_data_temp, core_metadata_select) 
  core_data_temp_full<- core_data_temp_full %>% 
    filter(!is.na(core_data_temp_full$year))

  # --------------------------------------------------------------------------------
  # Vertical alignment
  # --------------------------------------------------------------------------------
  
  # We have a set of temperature profiles that match our criteria we now need to align that data set to match the 
  # depth that are in target_depth_range, this will match the range of climatology values in temp_clim_va
  
  # create unique combinations of file_id and profile ranges
  profile_range_file_id <- 
    core_data_temp %>% 
    distinct(file_id, profile_range)
  
  # select variable of interest and prepare target_depth field
  core_data_temp_clean <- core_data_temp %>%
    select(-profile_range) %>%
    mutate(target_depth = depth, .after = depth)
  
  rm(core_data_temp)
  gc()
  
  # create all possible combinations of location, month and depth levels for interpolation
  target_depth_grid <-
    expand_grid(
      target_depth_levels,
      profile_range_file_id
    )

  # Constrain target_depth_grid to profile depth range
  target_depth_grid <-
    left_join(target_depth_grid, opt_profile_depth_range) %>%
    filter(target_depth <= max_depth)
  
  target_depth_grid <- target_depth_grid %>%
    select(target_depth,
           file_id)
  
  # Extend temp depth vectors with target depths
  core_data_temp_extended <-
    full_join(core_data_temp_clean, target_depth_grid) %>%
    arrange(file_id, target_depth)
  
  rm(core_data_temp_clean)
  gc()
  
  #----Spatial Interpolation----
  # Predict spline interpolation on adjusted depth grid for temp location and month
  core_data_temp_interpolated <-
    core_data_temp_extended %>%
    group_by(file_id) %>%
    mutate(temp_spline = spline(target_depth, temp_adjusted,
                                  method = "natural",
                                  xout = target_depth)$y) %>%
    ungroup()
  
  #---------- VISUALISATION of vertical alignment
  #Select only 1 profile
  core_data_temp_interpolated_subset<- core_data_temp_interpolated %>% 
    filter(file_id==1745801)
  
  #Target depths
  filtered_data <- core_data_temp_interpolated_subset %>%
    filter(target_depth %in% target_depth_grid$target_depth)

  
  ggplot() +
    geom_path(data = core_data_temp_interpolated_subset, aes(x = temp_spline, y = target_depth, color = "1"), linetype="solid") +
    geom_point(data = core_data_temp_interpolated_subset, aes(x = temp_adjusted, y = depth, color = "2"), size=1) +
    geom_point(data = filtered_data, aes(x = temp_spline, y = target_depth, color = "3"), size=1) +
    labs(x = "Temperature [°C]", y = "Depth [m]", 
         title = "Temperature Profile with spline interpolation")+
    scale_color_manual(values = c("1"="grey", "2" = "#4CA97C", "3" = "darkred"),
                       labels = c( "Spline", "Argo measurements", "Target depths")) +
    scale_y_reverse() +    
    theme_minimal()+
    guides(color = guide_legend(title="Data", nrow = 3, override.aes = list(linetype = c("solid"))))+
    # coord_cartesian(xlim= c(12,28), ylim = c(250, 50)) +
    theme(plot.title = element_text(size = 18),
          axis.title.x = element_text(size = 18),
          axis.title.y = element_text(size = 18),
          axis.text.x = element_text(size = 18),   
          axis.text.y = element_text(size = 18),
          legend.title = element_text(size = 16),
          legend.text = element_text(size = 16))+
  #---------- END VISUALISATION

  rm(core_data_temp_extended)
  gc()
  
  # Subset interpolated values on target depth range
  core_data_temp_interpolated_clean <- 
    inner_join(target_depth_levels, core_data_temp_interpolated)
  
  rm(core_data_temp_interpolated)
  gc()
  
  # Select columns and rename to initial names
  core_data_temp_interpolated_clean <-
    core_data_temp_interpolated_clean %>%
    select(file_id,
           depth = target_depth,
           temp = temp_spline)
  
  # Merge with profile range
  core_data_temp_interpolated_clean <-
    full_join(core_data_temp_interpolated_clean,
              profile_range_file_id)
  
  # Merge with meta data
  core_data_temp_interpolated_clean <-
    left_join(core_data_temp_interpolated_clean,
              core_metadata_select)
  core_data_temp_interpolated_clean<-core_data_temp_interpolated_clean %>% 
    filter(!is.na(year))


  # --------------------------------------------------------------------------------
  # Create anomaly profiles
  # --------------------------------------------------------------------------------
  
  # Create anomaly profiles as observed - climatology
  
  #Adding a column to ARGO data with day of the month to join data
  core_data_temp_interpolated_clean<-core_data_temp_interpolated_clean %>%
    mutate(day = as.numeric(format(date, "%d")))
  

  # Create core_temp_anomaly, but only where we have an climatology temperature
  core_temp_anomaly <-
    inner_join(core_data_temp_interpolated_clean,
               processed_chunks, by=c('month', 'day', 'depth', 'lat', 'lon'))
  

  # Calculate the anomaly temperature
  core_temp_anomaly <- core_temp_anomaly %>%
    mutate(anomaly = temp - interpolated_temp)
  
  #---------- VISUALISATION of temporal alignment
  #Chosen location for visualization
  location_counts <- core_temp_anomaly %>%
    filter(lat>0, lat<40, lon>150, lon<180) %>% #longitude in [0,360]
    group_by(lat, lon, depth) %>%
    summarise(count = n())%>%
    arrange(desc(count))
  
  #Be sure to have data at chosen location
  location_counts<- location_counts %>% 
    filter(count>0)
  
  #Anomaly profile at this location
  core_temp_anomaly_test<-core_temp_anomaly %>% 
    filter(lat==unique(location_counts$lat)[1], lon==unique(location_counts$lon)[1])
  
  temp_test_interpol<-processed_chunks%>%
    filter(lat==unique(core_temp_anomaly_test$lat), lon==unique(core_temp_anomaly_test$lon))
  
  monthly_temp_test_interpol <- temp_test_interpol[!is.na(temp_test_interpol$clim_temp), ]
  
  month_labels <- month.abb  #months abbreviations for x-labels
  depth<-Reduce(intersect, list(core_temp_anomaly_test$depth, temp_test_interpol$depth, monthly_temp_test_interpol$depth)) #common depths values between datasets
  plt_depth=c(depth[1], depth[15], depth[30], depth[50])
  
  #plot
  plot<- ggplot(temp_test_interpol[temp_test_interpol$depth %in% plt_depth, ], aes(x = day_of_year, color = as.factor(depth))) +
      geom_line(aes(y = interpolated_temp, linetype = 'Interpolated')) +
      geom_point(data= monthly_temp_test_interpol[monthly_temp_test_interpol$depth %in% plt_depth, ], aes(y=clim_temp), color='black')+
      geom_point(data = core_temp_anomaly_test[core_temp_anomaly_test$depth %in% plt_depth, ], aes(y = temp, shape="Observed"), size = 2, alpha=1/5) +
      geom_segment(data = monthly_temp_test_interpol[monthly_temp_test_interpol$depth %in% plt_depth, ], 
                    aes(y = clim_temp, x = day_of_year - 15, xend = day_of_year + 15, yend=clim_temp, linetype='Monthly'), 
                    color = 'black') +
      labs(x = "Day of the year", y = "Temperature [°C]", title = paste("Difference between monthly and daily climatology", target_year)) +
      scale_x_continuous(breaks = unique(temp_test_interpol$day_of_year[which(temp_test_interpol$day %% 31 == 1)]), labels = month_labels) +
      scale_color_discrete(name = "Depths [m]") +
      scale_linetype_manual(name = "Climatology Data", values = c("solid", "dashed") , labels = c("Interpolated", "Monthly")) +
      scale_shape_manual(name="ARGO data",  values=19, labels=c("Core Argo data")) +
      facet_wrap(~ paste("Location: Latitude:", unique(temp_test_interpol$lat), ", Longitude:", unique(temp_test_interpol$lon)-180), 
                 ncol = 1)+
    theme(plot.title = element_text(size = 34), 
          plot.subtitle = element_text(size = 28), 
          legend.text = element_text(size = 24),  
          legend.title = element_text(size = 26),
          axis.title.x = element_text(size = 24), 
          axis.title.y = element_text(size = 24),  
          axis.text.x = element_text(size = 24),   
          axis.text.y = element_text(size = 24))
  
  print(plot)

  #---------- END VISUALISATION

  # -----------------------------------------------------------------------------
  # Climatology check
  # -----------------------------------------------------------------------------
  # It is possible even though we have observational measures to full depth the climatology may not match all depth.
  # These profiles will be removed from both temp_core_va and temp_anomaly_va
  
  # Anomaly max depth
  core_temp_anomaly_depth_check <- core_temp_anomaly %>%
    group_by(file_id,
             profile_range) %>%
    summarise(min_pdepth = min(depth),
              max_pdepth = max(depth)) %>%
    ungroup()

  # Add the required min depth and max depth
  core_temp_anomaly_depth_check <-
    left_join(core_temp_anomaly_depth_check, opt_profile_depth_range)

  # This profiles do not match the depth required by the profile_range
  # min_depth_check <- min(target_depth_grid$target_depth)
  
  # Please double check if the criterion should be
  # each profile is checked against the min depth specified in min_depth
  # max depth specified in max_depth.
  remove_profiles <- core_temp_anomaly_depth_check %>%
    filter((max_pdepth < max_depth) | (min_pdepth > min_depth)) %>%
    distinct(file_id)

  # remove from both core_data_temp_interpolated_clean and core_temp_anomaly
  core_data_temp_interpolated_clean <-
    anti_join(core_data_temp_interpolated_clean, remove_profiles)

  core_temp_anomaly <- anti_join(core_temp_anomaly, remove_profiles)

  # --------------------------------------------------------------------------------
  # Write files
  # --------------------------------------------------------------------------------
  # Write the climatology that maps onto depth levels, interpolated temperature profiles that map onto depth levels and resulting anomaly files.
  core_data_temp_interpolated_clean %>%
    write_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_core_va.rds"))

  core_temp_anomaly %>%
    write_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_anomaly_va.rds"))

  core_data_temp_full %>%
    select(file_id, lat, lon, date, year, month, depth, temp_adjusted) %>%
    write_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_core_observed.rds"))

  rm(core_data_temp_interpolated_clean, core_temp_anomaly, core_data_temp_full)

}

#----Plot climatology interpolation 
#Read core temp anomaly data for the year of interest, here 2023
target_year<-2023
core_temp_anomaly_2023<-read_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_anomaly_va.rds"))

#Chosen location for visualisation
location_counts<- core_temp_anomaly_2023 %>%
  filter(lat < 40, lat > 0, lon - 180 < 0, lon - 180 > -30) %>% #extent eastern North Atlantic
  group_by(lat, lon) %>%
  filter(n_distinct(month) == 9) %>% #data through the year
  ungroup()

core_temp_anomaly_test<-core_temp_anomaly_2023 %>%
  filter(lat==unique(location_counts$lat)[4], lon==unique(location_counts$lon)[4])

temp_test_interpol<-processed_chunks%>%
  filter(lat==unique(core_temp_anomaly_test$lat), lon==unique(core_temp_anomaly_test$lon))

monthly_temp_test_interpol <- temp_test_interpol[!is.na(temp_test_interpol$clim_temp), ]

month_labels <- month.abb  #months abbreviations for x-labels
depth<-Reduce(intersect, list(core_temp_anomaly_test$depth, temp_test_interpol$depth, monthly_temp_test_interpol$depth)) #common depths values between datasets
plt_depth=c(depth[1],  depth[20], depth[34], depth[50])

#plot
plot<- 
  ggplot(temp_test_interpol[temp_test_interpol$depth %in% plt_depth, ], aes(x = day_of_year, color = as.factor(depth))) +
  geom_line(aes(y = interpolated_temp, linetype = 'Interpolated')) +
  geom_point(data= monthly_temp_test_interpol[monthly_temp_test_interpol$depth %in% plt_depth, ], aes(y=clim_temp), color='black')+
  geom_point(data = core_temp_anomaly_test[core_temp_anomaly_test$depth %in% plt_depth, ], aes(y = temp, shape="Observed"), size = 2, alpha=1/5) +
  geom_segment(data = monthly_temp_test_interpol[monthly_temp_test_interpol$depth %in% plt_depth, ], 
               aes(y = clim_temp, x = day_of_year - 15, xend = day_of_year + 15, yend=clim_temp, linetype='Monthly'), color = 'black') +
  # coord_cartesian(xlim=c(220,300),ylim = c(25,30))+
  theme_minimal()+
  labs(x = "Day of the year", y = "Temperature [°C]", 
       title = paste("Difference between monthly and daily climatology", target_year),
       subtitle=paste0("Location: Latitude:", unique(temp_test_interpol$lat), "°N, Longitude:", unique(temp_test_interpol$lon)-180, "°E")) +
  scale_x_continuous(breaks = unique(temp_test_interpol$day_of_year[which(temp_test_interpol$day %% 31 == 1)]), labels = month_labels) +
  scale_color_discrete(name = "Depths [m]") +
  scale_linetype_manual(name = "Climatology Data", values = c("solid", "dashed") , labels = c("Interpolated", "Monthly")) +
  scale_shape_manual(name="Observations",  values=19, labels=c("Core Argo data")) +
  theme(plot.title = element_text(size = 18), 
        plot.subtitle = element_text(size = 16), 
        legend.title = element_text(size = 14),
        legend.text = element_text(size = 12),  
        strip.text = element_text(size = 14),
        axis.title.x = element_text(size = 12), 
        axis.title.y = element_text(size = 12),  
        axis.text.x = element_text(size = 12),   
        axis.text.y = element_text(size = 12))

print(plot)

Version	Author	Date
99a9a20	mlarriere	2024-06-05
06df553	mlarriere	2024-06-03
f81959a	mlarriere	2024-04-12
427aad7	mlarriere	2024-04-08

Consolidate years

This process create three files in the path_argo_core_preprocessed directory that will be used for further analysis

# ------------------------------------------------------------------------------
# Process temperature file
# ------------------------------------------------------------------------------
consolidated_created = 0

for (target_year in opt_min_year:opt_max_year) {
  # target_year<-2023
  cat('year being processed:', target_year, '\n')

  # read the yearly file based on target_year
  temp_core_va_yr <-
  read_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_core_va.rds"))

  # Combine into a consolidated all years file
  if (consolidated_created == 0) {
    temp_core_va <- temp_core_va_yr
    consolidated_created = 1
  } else {
    temp_core_va <- rbind(temp_core_va, temp_core_va_yr)
  }
}

# write consolidated files  
temp_core_va %>%
  write_rds(file = paste0(path_core_preprocessed, "/temp_core_va.rds"))

# remove files to free space
rm(temp_core_va)
rm(temp_core_va_yr)
gc()

# ------------------------------------------------------------------------------
# Process anomaly file
# ------------------------------------------------------------------------------
consolidated_created = 0

for (target_year in opt_min_year:opt_max_year) {
  # target_year<-2023

  cat('year being processed:', target_year, '\n')

  # read the yearly file based on target_year
  temp_anomaly_va_yr <-
  read_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_anomaly_va.rds"))

  # Combine into a consolidated all years file
  if (consolidated_created == 0) {
    temp_anomaly_va <- temp_anomaly_va_yr
    consolidated_created = 1
  } else {
    temp_anomaly_va <- rbind(temp_anomaly_va, temp_anomaly_va_yr)
  }
}

# write consolidated files  
temp_anomaly_va %>%
  write_rds(file = paste0(path_core_preprocessed, "/temp_anomaly_va.rds"))

# remove files to free space
rm(temp_anomaly_va)
rm(temp_anomaly_va_yr)
gc()

# ------------------------------------------------------------------------------
# Process observed file
# ------------------------------------------------------------------------------
consolidated_created = 0

for (target_year in opt_min_year:opt_max_year) {
  # target_year<-2023

  cat('year being processed:', target_year, '\n')

  # read the yearly file based on target_year
  temp_core_observed_yr <-
  read_rds(file = paste0(path_core_preprocessed, "/", target_year, "_temp_core_observed.rds"))

  # Combine into a consolidated all years file
  if (consolidated_created == 0) {
    temp_core_observed <- temp_core_observed_yr
    consolidated_created = 1
  } else {
    temp_core_observed <- rbind(temp_core_observed, temp_core_observed_yr)
  }
}

# write consolidated files  
temp_core_observed %>%
  write_rds(file = paste0(path_core_preprocessed, "/temp_core_observed.rds"))

# remove files to free space
rm(temp_core_observed)
rm(temp_core_observed_yr)
gc()

Read files

Read files that were previously created ready for analysis

# read files
temp_core_va <- read_rds(file = paste0(path_core_preprocessed, "/temp_core_va.rds"))
temp_anomaly_va <- read_rds(file = paste0(path_core_preprocessed, "/temp_anomaly_va.rds"))
temp_core_observed <- read_rds(file = paste0(path_core_preprocessed, "/temp_core_observed.rds"))

Temperature anomaly

Details of mean anomaly over analysis period

max_depth_1 <- opt_profile_depth_range[1, "max_depth"]
max_depth_2 <- opt_profile_depth_range[2, "max_depth"]
max_depth_3 <- opt_profile_depth_range[3, "max_depth"]

# Profiles to 600m
anomaly_overall_mean_1 <- temp_anomaly_va %>% 
  filter(profile_range %in% c(1, 2, 3) & depth <= max_depth_1) %>%
  group_by(depth) %>% 
  summarise(temp_count = n(),
            temp_anomaly_mean = mean(anomaly, na.rm = TRUE),
            temp_anomaly_sd = sd(anomaly, na.rm = TRUE))

anomaly_year_mean_1 <- temp_anomaly_va %>% 
  filter(profile_range %in% c(1, 2, 3) & depth <= max_depth_1) %>%
  group_by(year, depth) %>% 
  summarise(temp_count = n(),
            temp_anomaly_mean = mean(anomaly, na.rm = TRUE),
            temp_anomaly_sd = sd(anomaly, na.rm = TRUE))

# Profiles to 1200m
anomaly_overall_mean_2 <- temp_anomaly_va %>% 
  filter(profile_range %in% c(2, 3) & depth <= max_depth_2) %>%
  group_by(depth) %>% 
  summarise(temp_count = n(),
            temp_anomaly_mean = mean(anomaly, na.rm = TRUE),
            temp_anomaly_sd = sd(anomaly, na.rm = TRUE))

anomaly_year_mean_2 <- temp_anomaly_va %>% 
  filter(profile_range %in% c(2, 3) & depth <= max_depth_2) %>%
  group_by(year, depth) %>% 
  summarise(temp_count = n(),
            temp_anomaly_mean = mean(anomaly, na.rm = TRUE),
            temp_anomaly_sd = sd(anomaly, na.rm = TRUE))

# Profiles to 1500m
anomaly_overall_mean_3 <- temp_anomaly_va %>% 
  filter(profile_range %in% c(3) & depth <= max_depth_3) %>%
  group_by(depth) %>% 
  summarise(temp_count = n(),
            temp_anomaly_mean = mean(anomaly, na.rm = TRUE),
            temp_anomaly_sd = sd(anomaly, na.rm = TRUE))

anomaly_year_mean_3 <- temp_anomaly_va %>% 
  filter(profile_range %in% c(3) & depth <= max_depth_3) %>%
  group_by(year, depth) %>% 
  summarise(temp_count = n(),
            temp_anomaly_mean = mean(anomaly, na.rm = TRUE),
            temp_anomaly_sd = sd(anomaly, na.rm = TRUE))

# All years anomaly
anomaly_overall_mean_1 %>% 
  ggplot()+
  geom_path(aes(x = temp_anomaly_mean,
                y = depth))+
  geom_ribbon(aes(xmax = temp_anomaly_mean + temp_anomaly_sd,
                  xmin = temp_anomaly_mean - temp_anomaly_sd,
                  y = depth),
              alpha = 0.2)+
  geom_vline(xintercept = 0)+
  scale_y_reverse() +
  coord_cartesian(xlim = opt_xlim) +
  scale_x_continuous(breaks = opt_xbreaks) +
  labs(
    title = paste0('Overall mean anomaly profiles to ', max_depth_1, 'm'),
    x = opt_measure_label,
    y = 'depth (m)'
  )

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

anomaly_overall_mean_2 %>% 
  ggplot()+
  geom_path(aes(x = temp_anomaly_mean,
                y = depth))+
  geom_ribbon(aes(xmax = temp_anomaly_mean + temp_anomaly_sd,
                  xmin = temp_anomaly_mean - temp_anomaly_sd,
                  y = depth),
              alpha = 0.2)+
  geom_vline(xintercept = 0)+
  scale_y_reverse() +
  coord_cartesian(xlim = opt_xlim) +
  scale_x_continuous(breaks = opt_xbreaks) +
  labs(
    title = paste0('Overall mean anomaly profiles to ', max_depth_2, 'm'),
    x = opt_measure_label,
    y = 'depth (m)'
  )

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

anomaly_overall_mean_3 %>% 
  ggplot()+
  geom_path(aes(x = temp_anomaly_mean,
                y = depth))+
  geom_ribbon(aes(xmax = temp_anomaly_mean + temp_anomaly_sd,
                  xmin = temp_anomaly_mean - temp_anomaly_sd,
                  y = depth),
              alpha = 0.2)+
  geom_vline(xintercept = 0)+
  scale_y_reverse() +
  coord_cartesian(xlim = opt_xlim) +
  scale_x_continuous(breaks = opt_xbreaks) +
  labs(
    title = paste0('Overall mean anomaly profiles to ', max_depth_3, 'm'),
    x = opt_measure_label,
    y = 'depth (m)'
  )

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

# yearly anomaly
anomaly_year_mean_1 %>% 
  ggplot()+
  geom_path(aes(x = temp_anomaly_mean,
                y = depth))+
  geom_ribbon(aes(xmax = temp_anomaly_mean + temp_anomaly_sd,
                  xmin = temp_anomaly_mean - temp_anomaly_sd,
                  y = depth),
              alpha = 0.2)+
  geom_vline(xintercept = 0)+
  scale_y_reverse() +
  facet_wrap(~year)+
  coord_cartesian(xlim = opt_xlim) +
  scale_x_continuous(breaks = opt_xbreaks) +
  labs(
    title = paste0('Yearly mean anomaly profiles to ', max_depth_1, 'm'),
    x = opt_measure_label,
    y = 'depth (m)'
  )

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

anomaly_year_mean_2 %>% 
  ggplot()+
  geom_path(aes(x = temp_anomaly_mean,
                y = depth))+
  geom_ribbon(aes(xmax = temp_anomaly_mean + temp_anomaly_sd,
                  xmin = temp_anomaly_mean - temp_anomaly_sd,
                  y = depth),
              alpha = 0.2)+
  geom_vline(xintercept = 0)+
  scale_y_reverse() +
  facet_wrap(~year)+
  coord_cartesian(xlim = opt_xlim) +
  scale_x_continuous(breaks = opt_xbreaks) +
  labs(
    title = paste0('Yearly mean anomaly profiles to ', max_depth_2, 'm'),
    x = opt_measure_label,
    y = 'depth (m)'
  )

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

anomaly_year_mean_3 %>% 
  ggplot()+
  geom_path(aes(x = temp_anomaly_mean,
                y = depth))+
  geom_ribbon(aes(xmax = temp_anomaly_mean + temp_anomaly_sd,
                  xmin = temp_anomaly_mean - temp_anomaly_sd,
                  y = depth),
              alpha = 0.2)+
  geom_vline(xintercept = 0)+
  scale_y_reverse() +
  facet_wrap(~year)+
  coord_cartesian(xlim = opt_xlim) +
  scale_x_continuous(breaks = opt_xbreaks) +
  labs(
    title = paste0('Yearly mean anomaly profiles to ', max_depth_3, 'm'),
    x = opt_measure_label,
    y = 'depth (m)'
  )

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

#rm(anomaly_overall_mean)

Profile counts

Details of the number of profiles and to which depths over the analysis period

temp_histogram <- temp_core_va %>%
  group_by(year, profile_range = as.character(profile_range)) %>%
  summarise(num_profiles = n_distinct(file_id)) %>%
  ungroup()

temp_histogram %>%
  ggplot() +
  geom_bar(
    aes(
      x = year,
      y = num_profiles,
      fill = profile_range,
      group = profile_range
    ),
    position = "stack",
    stat = "identity"
  ) +
  scale_fill_viridis_d() +
  scale_x_continuous(breaks = seq(opt_min_year, opt_max_year, by=1)) +
  labs(title = "temperature profiles per year and profile range",
       x = "year",
       y = "profile count",
       fill = "profile range")

Version	Author	Date
06df553	mlarriere	2024-06-03
af6594f	mlarriere	2024-05-13
c598391	mlarriere	2024-04-01
d7cfb48	mlarriere	2024-03-29
f9de50e	ds2n19	2024-01-01
80c16c2	ds2n19	2023-11-15

sessionInfo()

R version 4.2.2 (2022-10-31)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: openSUSE Leap 15.5

Matrix products: default
BLAS:   /usr/local/R-4.2.2/lib64/R/lib/libRblas.so
LAPACK: /usr/local/R-4.2.2/lib64/R/lib/libRlapack.so

locale:
 [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
 [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
 [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
 [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
 [9] LC_ADDRESS=C               LC_TELEPHONE=C            
[11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       

attached base packages:
[1] parallel  stats     graphics  grDevices utils     datasets  methods  
[8] base     

other attached packages:
 [1] ggforce_0.4.1    gsw_1.1-1        gridExtra_2.3    lubridate_1.9.0 
 [5] timechange_0.1.1 argodata_0.1.0   forcats_0.5.2    stringr_1.5.0   
 [9] dplyr_1.1.3      purrr_1.0.2      readr_2.1.3      tidyr_1.3.0     
[13] tibble_3.2.1     ggplot2_3.4.4    tidyverse_1.3.2  workflowr_1.7.0 

loaded via a namespace (and not attached):
 [1] httr_1.4.4          sass_0.4.4          viridisLite_0.4.1  
 [4] jsonlite_1.8.3      modelr_0.1.10       bslib_0.4.1        
 [7] assertthat_0.2.1    getPass_0.2-2       highr_0.9          
[10] googlesheets4_1.0.1 cellranger_1.1.0    yaml_2.3.6         
[13] pillar_1.9.0        backports_1.4.1     glue_1.6.2         
[16] digest_0.6.30       promises_1.2.0.1    polyclip_1.10-4    
[19] rvest_1.0.3         colorspace_2.0-3    htmltools_0.5.8.1  
[22] httpuv_1.6.6        pkgconfig_2.0.3     broom_1.0.5        
[25] haven_2.5.1         scales_1.2.1        processx_3.8.0     
[28] tweenr_2.0.2        whisker_0.4         later_1.3.0        
[31] tzdb_0.3.0          git2r_0.30.1        googledrive_2.0.0  
[34] farver_2.1.1        generics_0.1.3      ellipsis_0.3.2     
[37] cachem_1.0.6        withr_2.5.0         cli_3.6.1          
[40] magrittr_2.0.3      crayon_1.5.2        readxl_1.4.1       
[43] evaluate_0.18       ps_1.7.2            fs_1.5.2           
[46] fansi_1.0.3         MASS_7.3-58.1       xml2_1.3.3         
[49] tools_4.2.2         hms_1.1.2           gargle_1.2.1       
[52] lifecycle_1.0.3     munsell_0.5.0       reprex_2.0.2       
[55] callr_3.7.3         compiler_4.2.2      jquerylib_0.1.4    
[58] RNetCDF_2.6-1       rlang_1.1.1         grid_4.2.2         
[61] rstudioapi_0.15.0   labeling_0.4.2      rmarkdown_2.18     
[64] gtable_0.3.1        DBI_1.2.2           R6_2.5.1           
[67] knitr_1.41          fastmap_1.1.0       utf8_1.2.2         
[70] rprojroot_2.0.3     stringi_1.7.8       Rcpp_1.0.10        
[73] vctrs_0.6.4         dbplyr_2.2.1        tidyselect_1.2.0   
[76] xfun_0.35

Prepare core temperature data and vertically align to climatology

David Stappard, Marguerite Larriere & Jens Daniel Müller

13 June, 2024