ERDDAP > info > bcodmo_dataset_926873_v1

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
		data	graph		files	public	[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)		M	background			BCO-DMO	bcodmo_dataset_926873_v1

The Dataset's Variables and Attributes

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/
attribute	NC_GLOBAL	defaultDataQuery	String	&time<now
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
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 for legal use, since it may contain inaccuracies. Neither the data Contributor, ERD, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, 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

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.