Last updated: 2021-07-07

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Knit directory: emlr_obs_preprocessing/

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1 Data source

2 Read nc files

Here, we use the standard case V101 for public and raw data sets.

2.1 Public data sets

The publicly available data sets contain only positive Cant estimates.

2.1.1 3d fields

# open file
dcant <- tidync(paste(
  path_gruber_2019,
  "dcant_emlr_cstar_gruber_94-07_vs1.nc",
  sep = ""
))

# read gamma field as tibble
dcant <- dcant %>%  activate(GAMMA_DENS)
dcant_gamma <- dcant %>% hyper_tibble()

# read delta cant field
dcant <- dcant %>%  activate(DCANT_01)
dcant <- dcant %>% hyper_tibble()

# join cant and gamma fields
dcant <- left_join(dcant, dcant_gamma)

# harmonize column names and coordinates
dcant <- dcant %>% 
  rename(lon = LONGITUDE,
         lat = LATITUDE,
         depth = DEPTH,
         gamma = GAMMA_DENS,
         dcant_pos = DCANT_01) %>% 
  mutate(lon = if_else(lon < 20, lon + 360, lon))

rm(dcant_gamma)

2.1.2 Column inventories

dcant_inv <- tidync(paste(
  path_gruber_2019,
  "inv_dcant_emlr_cstar_gruber_94-07_vs1.nc",
  sep = ""
))

dcant_inv <- dcant_inv %>%  activate(DCANT_INV01)
dcant_inv <- dcant_inv %>% hyper_tibble()

# harmonize column names and coordinates
dcant_inv <- dcant_inv %>% 
  rename(lon = LONGITUDE,
         lat = LATITUDE,
         dcant_pos = DCANT_INV01) %>% 
  mutate(lon = if_else(lon < 20, lon + 360, lon))

2.2 Raw data

Internally available data sets also contain negative Cant estimates, as they are generated in the “raw” output of the eMLR mapping step.

# open v 101 file
V101 <- tidync(paste(path_gruber_2019,
                     "Cant_V101new.nc",
                     sep = ""))

# create tibble
V101 <- V101 %>%  activate(Cant)
V101 <- V101 %>% hyper_tibble()

# harmonize column names and coordinates
V101 <- V101 %>% 
  rename(lon = longitude,
         lat = latitude,
         dcant = Cant) %>% 
  filter(dcant != -999) %>% 
  mutate(lon = if_else(lon < 20, lon + 360, lon))

3 Apply basin mask

# use only three basin to assign general basin mask
# ie this is not specific to the MLR fitting
basinmask <- basinmask %>% 
  filter(MLR_basins == "2") %>% 
  select(lat, lon, basin_AIP)

dcant <- inner_join(dcant, basinmask)
dcant_inv_publ <- inner_join(dcant_inv, basinmask)
V101 <- inner_join(V101, basinmask)

4 Join pos and all delta Cant

# join files
dcant_3d <- inner_join(dcant, V101)

rm(dcant, V101)

5 Zonal mean section

dcant_zonal <- m_zonal_mean_sd(dcant_3d)

6 Column inventory

6.1 Calculation

dcant_inv_layers <- m_dcant_inv(dcant_3d)

dcant_inv <- dcant_inv_layers %>% 
  filter(inv_depth == params_global$inventory_depth_standard)

6.2 Plots

6.2.1 All Cant

p_map_cant_inv(
  df = dcant_inv,
  var = "dcant",
  col = "divergent")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

6.2.2 Pos Cant

p_map_cant_inv(
  df = dcant_inv,
  var = "dcant_pos")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

6.2.3 Published inventories

p_map_cant_inv(
  df = dcant_inv,
  var = "dcant_pos")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

6.2.4 Published vs calculated

# join published and calculated data sets
dcant_inv_offset <- inner_join(
  dcant_inv %>% rename(dcant_re = dcant_pos),
  dcant_inv_publ %>% rename(dcant_pub = dcant_pos)
)

# calculate offset
dcant_inv_offset <- dcant_inv_offset %>% 
  mutate(dcant_offset = dcant_re - dcant_pub)

# plot map
p_map_cant_inv_offset(df = dcant_inv_offset,
                      var = "dcant_offset",
                      breaks = seq(-3,3,0.25))

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06
rm(dcant_inv_offset, dcant_inv_publ)

7 Horizontal plane maps

7.1 All Cant

p_map_climatology(
  df = dcant_3d,
  var = "dcant",
  col = "divergent")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

7.2 Positive Cant

p_map_climatology(
  df = dcant_3d,
  var = "dcant_pos")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

7.3 Neutral density

p_map_climatology(
  df = dcant_3d,
  var = "gamma")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

8 Zonal mean section plot

8.1 Positive Cant

dcant_zonal %>%
  group_split(basin_AIP) %>%
  head(1) %>%
  map(
    ~ p_section_zonal(
      df = .x,
      var = "dcant_pos_mean",
      plot_slabs = "n",
      subtitle_text = paste("Basin:", unique(.x$basin_AIP))
    )
  )
[[1]]

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

9 Global sections plot

9.1 All Cant

p_section_global(
  df = dcant_3d,
  var = "dcant",
  col = "divergent")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

9.2 Positive Cant

p_section_global(
  df = dcant_3d,
  var = "dcant_pos")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

10 Sections at regular longitudes

10.1 All Cant

p_section_climatology_regular(
  df = dcant_3d,
  var = "dcant",
  col = "divergent")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

10.2 Positive Cant

p_section_climatology_regular(
  df = dcant_3d,
  var = "dcant_pos")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

10.3 Neutral density

p_section_climatology_regular(
  df = dcant_3d,
  var = "gamma")

Version Author Date
58bc706 jens-daniel-mueller 2021-07-06

11 Write files

dcant_3d %>%
  write_csv(paste(path_preprocessing,
                  "G19_dcant_3d.csv",
                  sep = ""))

dcant_inv %>%
  write_csv(paste(path_preprocessing,
                  "G19_dcant_inv.csv",
                  sep = ""))

dcant_zonal %>%
  write_csv(paste(path_preprocessing,
                  "G19_dcant_zonal.csv",
                  sep = ""))

sessionInfo()
R version 4.0.3 (2020-10-10)
Platform: x86_64-pc-linux-gnu (64-bit)
Running under: openSUSE Leap 15.2

Matrix products: default
BLAS:   /usr/local/R-4.0.3/lib64/R/lib/libRblas.so
LAPACK: /usr/local/R-4.0.3/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] stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
 [1] tidync_0.2.4    ggforce_0.3.3   metR_0.9.0      scico_1.2.0    
 [5] patchwork_1.1.1 collapse_1.5.0  forcats_0.5.0   stringr_1.4.0  
 [9] dplyr_1.0.5     purrr_0.3.4     readr_1.4.0     tidyr_1.1.2    
[13] tibble_3.0.4    ggplot2_3.3.3   tidyverse_1.3.0 workflowr_1.6.2

loaded via a namespace (and not attached):
 [1] httr_1.4.2               viridisLite_0.3.0        jsonlite_1.7.1          
 [4] modelr_0.1.8             assertthat_0.2.1         blob_1.2.1              
 [7] cellranger_1.1.0         yaml_2.2.1               pillar_1.4.7            
[10] backports_1.1.10         lattice_0.20-41          glue_1.4.2              
[13] RcppEigen_0.3.3.7.0      digest_0.6.27            promises_1.1.1          
[16] polyclip_1.10-0          checkmate_2.0.0          rvest_0.3.6             
[19] colorspace_1.4-1         htmltools_0.5.0          httpuv_1.5.4            
[22] Matrix_1.2-18            pkgconfig_2.0.3          broom_0.7.5             
[25] haven_2.3.1              scales_1.1.1             tweenr_1.0.2            
[28] whisker_0.4              later_1.1.0.1            git2r_0.27.1            
[31] generics_0.0.2           farver_2.0.3             ellipsis_0.3.1          
[34] withr_2.3.0              cli_2.1.0                magrittr_1.5            
[37] crayon_1.3.4             readxl_1.3.1             evaluate_0.14           
[40] ncdf4_1.17               fs_1.5.0                 fansi_0.4.1             
[43] MASS_7.3-53              xml2_1.3.2               RcppArmadillo_0.10.1.2.0
[46] tools_4.0.3              data.table_1.13.2        hms_0.5.3               
[49] lifecycle_1.0.0          munsell_0.5.0            reprex_0.3.0            
[52] isoband_0.2.2            compiler_4.0.3           RNetCDF_2.4-2           
[55] rlang_0.4.10             grid_4.0.3               rstudioapi_0.11         
[58] labeling_0.4.2           rmarkdown_2.5            gtable_0.3.0            
[61] DBI_1.1.0                R6_2.5.0                 ncmeta_0.3.0            
[64] lubridate_1.7.9          knitr_1.30               rprojroot_2.0.2         
[67] stringi_1.5.3            parallel_4.0.3           Rcpp_1.0.5              
[70] vctrs_0.3.5              dbplyr_1.4.4             tidyselect_1.1.0        
[73] xfun_0.18