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Dataset Title:	[Geochemical data from methane seeps in the Cascadia Margin] - Porewater geochemical data from methane seeps in the Astoria Canyon and Hydrate Ridge along the Cascadia Margin collected during R/V Atlantis cruises in 2023 and 2024 (Collaborative Research: Investigating the source and flux of dissolved organic carbon released from methane seeps to the deep-ocean)
Institution:	BCO-DMO   (Dataset ID: bcodmo_dataset_1002509_v1)
Information:	Summary | License | FGDC | ISO 19115 | Metadata | Background | Files | Make a graph

 

Variable	Optional Constraint #1		Optional Constraint #2		Minimum	Maximum
Cruise (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"HR23"	"HR24"
Region (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Astoria Canyon"	"Southern Hydrate R..."
Station (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"AC"	"SHR"
latitude (Lat_ddeg, degrees_north)	!= =~ <= >= = < >		!= =~ <= >= = < >		44.56981	46.24242
longitude (Long_ddeg, degrees_east)	!= =~ <= >= = < >		!= =~ <= >= = < >		-125.1481	-124.6012
Core_Type (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Gravity"	"push"
Core_retrieval_method (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"Alvin"	"multicorer"
Date_Collected (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"2023-08-13"	"2024-08-24"
Dive (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		1586	5214
Water_depth_m (meters (m))	!= =~ <= >= = < >		!= =~ <= >= = < >		599.01	853.89
Top_sed_depth_cm (centimeters below sea floor (cmbsf))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	325.0
Bottom_sed_depth_cm (centimeters below sea floor (cmbsf))	!= =~ <= >= = < >		!= =~ <= >= = < >		1.5	335.0
Depth_cm (centimeters below sea floor (cmbsf))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	330.0
Sample_ID (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"HR23-001"	"HR24-PW99"
Core_ID (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"DC_O3_m1"	"RW_ref2"
Core_Allocation (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"14C-Kun"	"See \"GC_pwDist\""
Flux_Regime_Location_Based (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"HIgh"	"Reference"
OLW_num (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"1"	"9"
Comments (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"...only 3ml of sed..."	"white nodules on top"
Frozen_status (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		"frozen"	"not frozen"
CH4_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		6.756262E-4	10.961
del13C_CH4 (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		-255.79	-38.39
CO2_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.13	36.69
del13C_CO2 (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		-82.93	24.09
Porosity (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.634303	0.9032593
del13C_DIC (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		-58.1158	33.74447
DIC_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.2644642	48.05916
DOC_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.305	91.072
del13C_DOC (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		-93.6627	-20.547
Sulfate_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.01076974	37.32276
Chloride_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		29.15351	788.1551
del13C_TOC (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		-32.68333	-22.08322
Corg_percent_TOC (weight percent (wt.%))	!= =~ <= >= = < >		!= =~ <= >= = < >		1.584564	3.420473
del15N_TON (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.9573438	12.55274
Norg_percent_TON (weight percent (wt.%))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.1750972	0.4626438
Norg_percent_TN (weight percent (wt.%))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.2739855	0.4629918
Corg_percent_TC (weight percent (wt.%))	!= =~ <= >= = < >		!= =~ <= >= = < >		2.404154	4.330713
del15N_TN (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		6.726669	12.45203
del13C_TC (per mille (‰))	!= =~ <= >= = < >		!= =~ <= >= = < >		-35.96857	-21.03
Hydrogen_nM (nanomolar (nM))	!= =~ <= >= = < >		!= =~ <= >= = < >		"0.59196322027011"	"8.48347711752148"
pH (unitless)	!= =~ <= >= = < >		!= =~ <= >= = < >		7.09	9.34
Alkalinity_meq_L (milliequivalents per liter)	!= =~ <= >= = < >		!= =~ <= >= = < >		2.7	66.7
H2S_mM (millimolar (mM))	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0	21.1
NH3_mgN_L (milligrams N per liter)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.205	69.812
PO4_mgP_L (milligrams P per liter)	!= =~ <= >= = < >		!= =~ <= >= = < >		"0.08"	"4.3132"
NO2_NO3_mgN_L (milligrams N per liter)	!= =~ <= >= = < >		!= =~ <= >= = < >		"0.056"	"17.46"
B_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.3742968	0.5935397
Ba_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		3.94394E-4	0.008562338
Ca_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		3.873042	10.07181
Fe_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.01002352	0.09305826
K_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		10.54939	14.38524
Mg_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		45.95229	59.48077
Na_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		425.5598	536.3425
Si_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.3908966	0.9587949
Sr_mmol_kg (millimoles per kilogram)	!= =~ <= >= = < >		!= =~ <= >= = < >		0.0387879	0.1001002

 

Server-side Functions

distinct()

orderBy orderByDescending orderByClosest orderByCount orderByLimit orderByMax orderByMin orderByMinMax orderByMean orderBySum (" Cruise Region Station latitude longitude Core_Type Core_retrieval_method Date_Collected Dive Water_depth_m Top_sed_depth_cm Bottom_sed_depth_cm Depth_cm Sample_ID Core_ID Core_Allocation Flux_Regime_Location_Based OLW_num Comments Frozen_status CH4_mM del13C_CH4 CO2_mM del13C_CO2 Porosity del13C_DIC DIC_mM DOC_mM del13C_DOC Sulfate_mM Chloride_mM del13C_TOC Corg_percent_TOC del15N_TON Norg_percent_TON Norg_percent_TN Corg_percent_TC del15N_TN del13C_TC Hydrogen_nM pH Alkalinity_meq_L H2S_mM NH3_mgN_L PO4_mgP_L NO2_NO3_mgN_L B_mmol_kg Ba_mmol_kg Ca_mmol_kg Fe_mmol_kg K_mmol_kg Mg_mmol_kg Na_mmol_kg Si_mmol_kg Sr_mmol_kg Cruise Region Station latitude longitude Core_Type Core_retrieval_method Date_Collected Dive Water_depth_m Top_sed_depth_cm Bottom_sed_depth_cm Depth_cm Sample_ID Core_ID Core_Allocation Flux_Regime_Location_Based OLW_num Comments Frozen_status CH4_mM del13C_CH4 CO2_mM del13C_CO2 Porosity del13C_DIC DIC_mM DOC_mM del13C_DOC Sulfate_mM Chloride_mM del13C_TOC Corg_percent_TOC del15N_TON Norg_percent_TON Norg_percent_TN Corg_percent_TC del15N_TN del13C_TC Hydrogen_nM pH Alkalinity_meq_L H2S_mM NH3_mgN_L PO4_mgP_L NO2_NO3_mgN_L B_mmol_kg Ba_mmol_kg Ca_mmol_kg Fe_mmol_kg K_mmol_kg Mg_mmol_kg Na_mmol_kg Si_mmol_kg Sr_mmol_kg Cruise Region Station latitude longitude Core_Type Core_retrieval_method Date_Collected Dive Water_depth_m Top_sed_depth_cm Bottom_sed_depth_cm Depth_cm Sample_ID Core_ID Core_Allocation Flux_Regime_Location_Based OLW_num Comments Frozen_status CH4_mM del13C_CH4 CO2_mM del13C_CO2 Porosity del13C_DIC DIC_mM DOC_mM del13C_DOC Sulfate_mM Chloride_mM del13C_TOC Corg_percent_TOC del15N_TON Norg_percent_TON Norg_percent_TN Corg_percent_TC del15N_TN del13C_TC Hydrogen_nM pH Alkalinity_meq_L H2S_mM NH3_mgN_L PO4_mgP_L NO2_NO3_mgN_L B_mmol_kg Ba_mmol_kg Ca_mmol_kg Fe_mmol_kg K_mmol_kg Mg_mmol_kg Na_mmol_kg Si_mmol_kg Sr_mmol_kg Cruise Region Station latitude longitude Core_Type Core_retrieval_method Date_Collected Dive Water_depth_m Top_sed_depth_cm Bottom_sed_depth_cm Depth_cm Sample_ID Core_ID Core_Allocation Flux_Regime_Location_Based OLW_num Comments Frozen_status CH4_mM del13C_CH4 CO2_mM del13C_CO2 Porosity del13C_DIC DIC_mM DOC_mM del13C_DOC Sulfate_mM Chloride_mM del13C_TOC Corg_percent_TOC del15N_TON Norg_percent_TON Norg_percent_TN Corg_percent_TC del15N_TN del13C_TC Hydrogen_nM pH Alkalinity_meq_L H2S_mM NH3_mgN_L PO4_mgP_L NO2_NO3_mgN_L B_mmol_kg Ba_mmol_kg Ca_mmol_kg Fe_mmol_kg K_mmol_kg Mg_mmol_kg Na_mmol_kg Si_mmol_kg Sr_mmol_kg Cruise Region Station latitude longitude Core_Type Core_retrieval_method Date_Collected Dive Water_depth_m Top_sed_depth_cm Bottom_sed_depth_cm Depth_cm Sample_ID Core_ID Core_Allocation Flux_Regime_Location_Based OLW_num Comments Frozen_status CH4_mM del13C_CH4 CO2_mM del13C_CO2 Porosity del13C_DIC DIC_mM DOC_mM del13C_DOC Sulfate_mM Chloride_mM del13C_TOC Corg_percent_TOC del15N_TON Norg_percent_TON Norg_percent_TN Corg_percent_TC del15N_TN del13C_TC Hydrogen_nM pH Alkalinity_meq_L H2S_mM NH3_mgN_L PO4_mgP_L NO2_NO3_mgN_L B_mmol_kg Ba_mmol_kg Ca_mmol_kg Fe_mmol_kg K_mmol_kg Mg_mmol_kg Na_mmol_kg Si_mmol_kg Sr_mmol_kg ")

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The Dataset Attribute Structure (.das) for this Dataset

Attributes {
 s {
  Cruise {
    String long_name "Cruise";
    String units "unitless";
  }
  Region {
    String long_name "Region";
    String units "unitless";
  }
  Station {
    String long_name "Station";
    String units "unitless";
  }
  latitude {
    String _CoordinateAxisType "Lat";
    Float32 actual_range 44.56981, 46.24242;
    String axis "Y";
    String ioos_category "Location";
    String long_name "Lat_ddeg";
    String standard_name "latitude";
    String units "degrees_north";
  }
  longitude {
    String _CoordinateAxisType "Lon";
    Float32 actual_range -125.1481, -124.6012;
    String axis "X";
    String ioos_category "Location";
    String long_name "Long_ddeg";
    String standard_name "longitude";
    String units "degrees_east";
  }
  Core_Type {
    String long_name "Core_type";
    String units "unitless";
  }
  Core_retrieval_method {
    String long_name "Core_retrieval_method";
    String units "unitless";
  }
  Date_Collected {
    String long_name "Date_collected";
    String units "unitless";
  }
  Dive {
    Int32 actual_range 1586, 5214;
    String long_name "Dive";
    String units "unitless";
  }
  Water_depth_m {
    Float32 actual_range 599.01, 853.89;
    String long_name "Water_depth_m";
    String units "meters (m)";
  }
  Top_sed_depth_cm {
    Float32 actual_range 0.0, 325.0;
    String long_name "Top_sed_depth_cm";
    String units "centimeters below sea floor (cmbsf)";
  }
  Bottom_sed_depth_cm {
    Float32 actual_range 1.5, 335.0;
    String long_name "Bottom_sed_depth_cm";
    String units "centimeters below sea floor (cmbsf)";
  }
  Depth_cm {
    Float32 actual_range 0.0, 330.0;
    String long_name "Depth_cm";
    String units "centimeters below sea floor (cmbsf)";
  }
  Sample_ID {
    String long_name "Sample_id";
    String units "unitless";
  }
  Core_ID {
    String long_name "Core_id";
    String units "unitless";
  }
  Core_Allocation {
    String long_name "Core_allocation";
    String units "unitless";
  }
  Flux_Regime_Location_Based {
    String long_name "Flux_regime_location_based";
    String units "unitless";
  }
  OLW_num {
    String long_name "Olw_num";
    String units "unitless";
  }
  Comments {
    String long_name "Comments";
    String units "unitless";
  }
  Frozen_status {
    String long_name "Frozen_status";
    String units "unitless";
  }
  CH4_mM {
    Float32 actual_range 6.756262e-4, 10.961;
    String long_name "Ch4_mm";
    String units "millimolar (mM)";
  }
  del13C_CH4 {
    Float32 actual_range -255.79, -38.39;
    String long_name "Del13c_ch4";
    String units "per mille (‰)";
  }
  CO2_mM {
    Float32 actual_range 0.13, 36.69;
    String long_name "Co2_mm";
    String units "millimolar (mM)";
  }
  del13C_CO2 {
    Float32 actual_range -82.93, 24.09;
    String long_name "Del13c_co2";
    String units "per mille (‰)";
  }
  Porosity {
    Float32 actual_range 0.634303, 0.9032593;
    String long_name "Porosity";
    String units "unitless";
  }
  del13C_DIC {
    Float32 actual_range -58.1158, 33.74447;
    String long_name "Del13c_dic";
    String units "per mille (‰)";
  }
  DIC_mM {
    Float32 actual_range 0.2644642, 48.05916;
    String long_name "Dic_mm";
    String units "millimolar (mM)";
  }
  DOC_mM {
    Float32 actual_range 0.305, 91.072;
    String long_name "Doc_mm";
    String units "millimolar (mM)";
  }
  del13C_DOC {
    Float32 actual_range -93.6627, -20.547;
    String long_name "Del13c_doc";
    String units "per mille (‰)";
  }
  Sulfate_mM {
    Float32 actual_range 0.01076974, 37.32276;
    String long_name "Sulfate_mm";
    String units "millimolar (mM)";
  }
  Chloride_mM {
    Float32 actual_range 29.15351, 788.1551;
    String long_name "Chloride_mm";
    String units "millimolar (mM)";
  }
  del13C_TOC {
    Float32 actual_range -32.68333, -22.08322;
    String long_name "Del13c_toc";
    String units "per mille (‰)";
  }
  Corg_percent_TOC {
    Float32 actual_range 1.584564, 3.420473;
    String long_name "Corg_percent_toc";
    String units "weight percent (wt.%)";
  }
  del15N_TON {
    Float32 actual_range 0.9573438, 12.55274;
    String long_name "Del15n_ton";
    String units "per mille (‰)";
  }
  Norg_percent_TON {
    Float32 actual_range 0.1750972, 0.4626438;
    String long_name "Norg_percent_ton";
    String units "weight percent (wt.%)";
  }
  Norg_percent_TN {
    Float32 actual_range 0.2739855, 0.4629918;
    String long_name "Norg_percent_tn";
    String units "weight percent (wt.%)";
  }
  Corg_percent_TC {
    Float32 actual_range 2.404154, 4.330713;
    String long_name "Corg_percent_tc";
    String units "weight percent (wt.%)";
  }
  del15N_TN {
    Float32 actual_range 6.726669, 12.45203;
    String long_name "Del15n_tn";
    String units "per mille (‰)";
  }
  del13C_TC {
    Float32 actual_range -35.96857, -21.03;
    String long_name "Del13c_tc";
    String units "per mille (‰)";
  }
  Hydrogen_nM {
    String long_name "Hydrogen_nm";
    String units "nanomolar (nM)";
  }
  pH {
    Float32 actual_range 7.09, 9.34;
    String long_name "Ph";
    String units "unitless";
  }
  Alkalinity_meq_L {
    Float32 actual_range 2.7, 66.7;
    String long_name "Alkalinity_meq_l";
    String units "milliequivalents per liter";
  }
  H2S_mM {
    Float32 actual_range 0.0, 21.1;
    String long_name "H2s_mm";
    String units "millimolar (mM)";
  }
  NH3_mgN_L {
    Float32 actual_range 0.205, 69.812;
    String long_name "Nh3_mgn_l";
    String units "milligrams N per liter";
  }
  PO4_mgP_L {
    String long_name "Po4_mgp_l";
    String units "milligrams P per liter";
  }
  NO2_NO3_mgN_L {
    String long_name "No2_no3_mgn_l";
    String units "milligrams N per liter";
  }
  B_mmol_kg {
    Float32 actual_range 0.3742968, 0.5935397;
    String long_name "B_mmol_kg";
    String units "millimoles per kilogram";
  }
  Ba_mmol_kg {
    Float32 actual_range 3.94394e-4, 0.008562338;
    String long_name "Ba_mmol_kg";
    String units "millimoles per kilogram";
  }
  Ca_mmol_kg {
    Float32 actual_range 3.873042, 10.07181;
    String long_name "Ca_mmol_kg";
    String units "millimoles per kilogram";
  }
  Fe_mmol_kg {
    Float32 actual_range 0.01002352, 0.09305826;
    String long_name "Fe_mmol_kg";
    String units "millimoles per kilogram";
  }
  K_mmol_kg {
    Float32 actual_range 10.54939, 14.38524;
    String long_name "K_mmol_kg";
    String units "millimoles per kilogram";
  }
  Mg_mmol_kg {
    Float32 actual_range 45.95229, 59.48077;
    String long_name "Mg_mmol_kg";
    String units "millimoles per kilogram";
  }
  Na_mmol_kg {
    Float32 actual_range 425.5598, 536.3425;
    String long_name "Na_mmol_kg";
    String units "millimoles per kilogram";
  }
  Si_mmol_kg {
    Float32 actual_range 0.3908966, 0.9587949;
    String long_name "Si_mmol_kg";
    String units "millimoles per kilogram";
  }
  Sr_mmol_kg {
    Float32 actual_range 0.0387879, 0.1001002;
    String long_name "Sr_mmol_kg";
    String units "millimoles per kilogram";
  }
 }
  NC_GLOBAL {
    String cdm_data_type "Other";
    String Conventions "COARDS, CF-1.6, ACDD-1.3";
    String creator_email "info@bco-dmo.org";
    String creator_name "BCO-DMO";
    String creator_url "https://www.bco-dmo.org/";
    String doi "10.26008/1912/bco-dmo.1002509.1";
    Float64 Easternmost_Easting -124.6012;
    Float64 geospatial_lat_max 46.24242;
    Float64 geospatial_lat_min 44.56981;
    String geospatial_lat_units "degrees_north";
    Float64 geospatial_lon_max -124.6012;
    Float64 geospatial_lon_min -125.1481;
    String geospatial_lon_units "degrees_east";
    String history 
"2026-09-11T07:05:19Z (local files)
2026-09-11T07:05:19Z https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_1002509_v1.html";
    String infoUrl "https://osprey.bco-dmo.org/dataset/1002509";
    String institution "BCO-DMO";
    String license 
"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.";
    Float64 Northernmost_Northing 46.24242;
    String sourceUrl "(local files)";
    Float64 Southernmost_Northing 44.56981;
    String summary "These data include vertical profiles of concentrations and stable carbon isotope values of dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), and total organic carbon (TOC) from sediment cores collected at methane seeps and reference sites. Sediment porosity and dissolved sulfate and methane concentrations are also presented. Methane seeps in Astoria Canyon and Hydrate Ridge along the Cascadia Margin were sampled. These data were collected over two years and across two cruises: AT50-14 (R/V Atlantis, 2023) and AT50-29B (R/V Atlantis, 2024). These data are used to assess the prevalence of methane-derived DOC at methane seeps, which may contribute 'old' carbon to the deep ocean or serve as a source of reduced carbon for the deep ocean microbial loop.";
    String title "[Geochemical data from methane seeps in the Cascadia Margin] - Porewater geochemical data from methane seeps in the Astoria Canyon and Hydrate Ridge along the Cascadia Margin collected during R/V Atlantis cruises in 2023 and 2024 (Collaborative Research: Investigating the source and flux of dissolved organic carbon released from methane seeps to the deep-ocean)";
    Float64 Westernmost_Easting -125.1481;
  }
}

 

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Using tabledap to Request Data and Graphs from Tabular Datasets

tabledap lets you request a data subset, a graph, or a map from a tabular dataset (for example, buoy data), via a specially formed URL. tabledap uses the OPeNDAP Data Access Protocol (DAP) and its selection constraints.

The URL specifies what you want: the dataset, a description of the graph or the subset of the data, and the file type for the response.

• (easy) You can get data by using the dataset's Data Access Form or Subset form. They make the URL for you.
• (easy) You can make a graph or map by using the dataset's Make A Graph form. It makes the URL for you.
• (not hard) You can bypass the forms and get the data or make a graph or map by generating the URL by hand or with a computer program or script.

Tabledap request URLs must be in the form
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/datasetID.fileType{?query}
For example,
https://coastwatch.pfeg.noaa.gov/erddap/tabledap/pmelTaoDySst.htmlTable?longitude,latitude,time,station,wmo_platform_code,T_25&time>=2015-05-23T12:00:00Z&time<=2015-05-31T12:00:00Z
Thus, the query is often a comma-separated list of desired variable names, followed by a collection of constraints (e.g., variable<value), each preceded by '&' (which is interpreted as "AND").

For details, see the tabledap Documentation.

 

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