BCO-DMO ERDDAP
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Row Type Variable Name Attribute Name Data Type Value
attribute NC_GLOBAL cdm_data_type String Other
attribute NC_GLOBAL Conventions String COARDS, CF-1.6, ACDD-1.3
attribute NC_GLOBAL creator_email String info at bco-dmo.org
attribute NC_GLOBAL creator_name String BCO-DMO
attribute NC_GLOBAL creator_url String https://www.bco-dmo.org/ (external link)
attribute NC_GLOBAL doi String 10.26008/1912/bco-dmo.926873.1
attribute NC_GLOBAL Easternmost_Easting double -120.4065
attribute NC_GLOBAL geospatial_lon_max double -120.4065
attribute NC_GLOBAL geospatial_lon_min double -130.548
attribute NC_GLOBAL geospatial_lon_units String degrees_east
attribute NC_GLOBAL geospatial_vertical_max double 599.456
attribute NC_GLOBAL geospatial_vertical_min double 9.59
attribute NC_GLOBAL geospatial_vertical_positive String down
attribute NC_GLOBAL geospatial_vertical_units String m
attribute NC_GLOBAL infoUrl String https://www.bco-dmo.org/dataset/926873 (external link)
attribute NC_GLOBAL institution String BCO-DMO
attribute NC_GLOBAL license String The data may be used and redistributed for free but is not intended\nfor legal use, since it may contain inaccuracies. Neither the data\nContributor, ERD, NOAA, nor the United States Government, nor any\nof their employees or contractors, makes any warranty, express or\nimplied, including warranties of merchantability and fitness for a\nparticular purpose, or assumes any legal liability for the accuracy,\ncompleteness, or usefulness, of this information.
attribute NC_GLOBAL sourceUrl String (local files)
attribute NC_GLOBAL summary String Monomethylmercury (MMHg) is a neurotoxicant that biomagnifies in marine food webs, reaching high concentrations in apex predators. To predict changes in oceanic MMHg concentrations, it is important to quantify its sources and sinks. Here, we study mercury speciation in the California Current System through cruise sampling and modeling. Previous work in the California Current System has found that upwelling impacts mercury biogeochemistry by transporting mercury-enriched deep waters to productive surface waters. These upwelled waters originate within the California Undercurrent water mass and are subsequently advected as a surface water parcel to the California Current. By comparing the two major water masses, we find that the California Undercurrent contains elevated dissolved total mercury (Hg) and Dimethylmercury (DMHg) concentrations by 57% and 60%, respectively, compared to the California Current. We explain that these differences result from losses during advection, specifically scavenging and DMHg demethylation. We calculate a net DMHg demethylation rate constant of 1.8 ± 0.9% per day; and build an empirically constrained mass budget model to demonstrate that DMHg demethylation accounts for 59% of surface MMHg sources. These findings illustrate that DMHg is a significant source of MMHg in this region, challenging the current understanding of the major sources of marine MMHg. These data are associated with Adams et al., 2024 (doi: 10.21203/rs.3.rs-3909481/v1).
attribute NC_GLOBAL time_coverage_end String 2021-08-09T19:00:00Z
attribute NC_GLOBAL time_coverage_start String 2021-07-19T23:00:00Z
attribute NC_GLOBAL title String [Dissolved Mercury Speciation in the California Current System] - Dissolved mercury (Hg) speciation in the California Current System from samples collected on R/V Roger Revelle cruise RR2105 in July to August 2021 (California Current Ecosystem Long Term Ecological Research site)
attribute NC_GLOBAL Westernmost_Easting double -130.548
variable Water_Mass String
attribute Water_Mass long_name String Water_mass
attribute Water_Mass units String unitless
variable Station_Name String
attribute Station_Name long_name String Station_name
attribute Station_Name units String unitless
variable ISO_DateTime_PDT String
attribute ISO_DateTime_PDT long_name String Iso_datetime_pdt
attribute ISO_DateTime_PDT units String unitless
variable time double
attribute time _CoordinateAxisType String Time
attribute time actual_range double 1.6267356E9, 1.6285356E9
attribute time axis String T
attribute time ioos_category String Time
attribute time long_name String Iso_datetime_utc
attribute time standard_name String time
attribute time time_origin String 01-JAN-1970 00:00:00
attribute time units String seconds since 1970-01-01T00:00:00Z
variable Latitude float
attribute Latitude actual_range float 34.42333, 36.56186
attribute Latitude long_name String Latitude
attribute Latitude units String degrees_north
variable longitude float
attribute longitude _CoordinateAxisType String Lon
attribute longitude actual_range float -130.548, -120.4065
attribute longitude axis String X
attribute longitude ioos_category String Location
attribute longitude long_name String Longitude
attribute longitude standard_name String longitude
attribute longitude units String degrees_east
variable Trace_Metal_Cast_Num int
attribute Trace_Metal_Cast_Num actual_range int 5, 39
attribute Trace_Metal_Cast_Num long_name String Trace_metal_cast_num
attribute Trace_Metal_Cast_Num units String unitless
variable depth float
attribute depth _CoordinateAxisType String Height
attribute depth _CoordinateZisPositive String down
attribute depth actual_range float 9.59, 599.456
attribute depth axis String Z
attribute depth ioos_category String Location
attribute depth long_name String Depth_m
attribute depth positive String down
attribute depth standard_name String depth
attribute depth units String m
variable Temperature_C float
attribute Temperature_C actual_range float 5.5118, 18.434
attribute Temperature_C long_name String Temperature_c
attribute Temperature_C units String degrees Celsius
variable Salinity_PSU float
attribute Salinity_PSU actual_range float 28.0836, 34.3083
attribute Salinity_PSU long_name String Salinity_psu
attribute Salinity_PSU units String practical salinity units (PSU)
variable Oxygen_umol_kg float
attribute Oxygen_umol_kg actual_range float 10.45, 306.672
attribute Oxygen_umol_kg long_name String Oxygen_umol_kg
attribute Oxygen_umol_kg units String micromole per kilogram (umol/kg)
variable Density_kg_m3 float
attribute Density_kg_m3 actual_range float 1023.462, 1029.822
attribute Density_kg_m3 long_name String Density_kg_m3
attribute Density_kg_m3 units String kilogram per cubed meter (kg/m^3)
variable DMHg_fM float
attribute DMHg_fM actual_range float 1.57, 461.62
attribute DMHg_fM long_name String Dmhg_fm
attribute DMHg_fM units String femtomolar (fM)
variable DMHg_Flag int
attribute DMHg_Flag actual_range int 0, 1
attribute DMHg_Flag long_name String Dmhg_flag
attribute DMHg_Flag units String unitless
variable Hg0_fM float
attribute Hg0_fM actual_range float 6.4, 312.36
attribute Hg0_fM long_name String Hg0_fm
attribute Hg0_fM units String femtomolar (fM)
variable Hg0_Flag int
attribute Hg0_Flag actual_range int 0, 1
attribute Hg0_Flag long_name String Hg0_flag
attribute Hg0_Flag units String unitless
variable MMHg_fM float
attribute MMHg_fM actual_range float 11.34, 81.62
attribute MMHg_fM long_name String Mmhg_fm
attribute MMHg_fM units String femtomolar (fM)
variable MMHg_Flag int
attribute MMHg_Flag actual_range int 0, 1
attribute MMHg_Flag long_name String Mmhg_flag
attribute MMHg_Flag units String unitless
variable THg_pM float
attribute THg_pM actual_range float 0.0895, 2.5597
attribute THg_pM long_name String Thg_pm
attribute THg_pM units String picomolar (pM)
variable THg_Flag int
attribute THg_Flag actual_range int 0, 1
attribute THg_Flag long_name String Thg_flag
attribute THg_Flag units String unitless

 
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