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BCO-DMO ERDDAP
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| griddap | Subset | tabledap | Make A Graph | wms | files | Accessible | Title | Summary | FGDC | ISO 19115 | Info | Background Info | RSS | Institution | Dataset ID | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_965250_v1 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_965250_v1.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_965250_v1/ | public | [Cryptic CH4 Cycling] - Biogeochemical data on cryptic methane cycling in hypersaline sediments of the Carpinteria Salt Marsh Reserve, California from sampling in 2019 (Deciphering the Cryptic Cycling of Methane in Sediments of a Coastal Wetland) | Methylotrophic methanogenesis occurring within sulfate-rich zones of coastal and marine sediments is functionally linked to anaerobic methane oxidation (AOM), together constituting a cryptic methane cycle. This investigation presents data on such cryptic methane cycling across a land-to-sea transect comprising four sampling sites within the Carpinteria Salt Marsh Reserve (CSMR) in southern California, USA: two brackish, one marine, and one hypersaline. Surface sediments (upper 20 cm) were examined using geochemical profiling and radiotracer incubation experiments employing 35S-labeled sulfate, 14C-labeled monomethylamine, and 14C-labeled methane.\n \nMethane concentrations in sediment porewater were generally low (3–28 µM) across all sites, except at the marine station, where levels increased with depth, reaching up to 665 µM. Methane production from monomethylamine was detected throughout the depth profiles at all stations, with estimated rates ranging from sub-nanomolar to nanomolar per cubic centimeter of sediment per day. AOM, quantified via 14C-CH₄ tracer, co-occurred with methylotrophic methanogenesis at each station, exhibiting activity levels between 0.03 and 19.4 nmol cm⁻³ d⁻¹.\n \nPorewater chemistry revealed elevated concentrations of sulfate and dissolved iron across all sites. Sulfate levels (9–91 mM) remained sufficiently high to support sulfate reduction, which showed activity levels from 1.5 to 2,506 nmol cm⁻³ d⁻¹. Vertical profiles of sulfide and Fe(II) suggested a geochemical shift along the transect—from iron-dominated reduction at the brackish stations to sulfate-dominated reduction at the marine and hypersaline stations. AOM activity overlapped with zones of sulfate reduction and Fe(II) enrichment, indicating that methane oxidation may be coupled to both sulfate and iron reduction across all sampling locations.\n\ncdm_data_type = Other\nVARIABLES:\nDate (unitless)\nTime_Local_PST (unitless)\nTime_UTC (unitless)\ntime (Iso_datetime_utc, seconds since 1970-01-01T00:00:00Z)\nSite_Name (unitless)\nlatitude (degrees_north)\n... (16 more variables)\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_965250_v1_fgdc.xml | https://erddap.bco-dmo.org/erddap/metadata/iso19115/xml/bcodmo_dataset_965250_v1_iso19115.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_965250_v1/index.htmlTable | https://osprey.bco-dmo.org/dataset/965250
| https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_965250_v1.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_965250_v1&showErrors=false&email= | BCO-DMO | bcodmo_dataset_965250_v1 | |||
| https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_646825.subset | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_646825 | https://erddap.bco-dmo.org/erddap/tabledap/bcodmo_dataset_646825.graph | https://erddap.bco-dmo.org/erddap/files/bcodmo_dataset_646825/ | public | [GN01 CTD - ODF Bottle] - Bottle data from the CTD-ODF carousel on the GEOTRACES Arctic Section cruise (HLY1502) from August to October 2015 (U.S. GEOTRACES Arctic project) (U.S. Arctic GEOTRACES Study) | Bottle data from the CTD-ODF carousel on the GEOTRACES Arctic Section cruise (HLY1502) from August to October 2015.\n\ncdm_data_type = Other\nVARIABLES:\ncruise_id (unitless)\nEXPOCODE (unitless)\nSECT_ID (unitless)\nSTNNBR (unitless)\nCASTNO (unitless)\nGEOTRC_EVENTNO (unitless)\nDATE (unitless)\ntime2 (TIME, unitless)\ntime (ISO Date Time UTC, seconds since 1970-01-01T00:00:00Z)\nlatitude (degrees_north)\nlongitude (degrees_east)\nGEOTRC_SAMPNO (unitless)\nSAMPNO (unitless)\nBTLNBR (unitless)\nBTLNBR_FLAG_W (unitless)\nDEPTH (meters (corrected))\nCTDPRS (decibars)\ndepth (CTDDEPTH, m)\nCTDTMP (degrees Celsius)\nCTDSAL (PSS-78)\nCTDSAL_FLAG_W (unitless)\nSALNTY (PSS-78)\nSALNTY_FLAG_W (unitless)\nSALTREF (Sea Water Practical Salinity, G/KG)\nSALTREF_FLAG_W (unitless)\nCTDOXY (UMOL/KG)\n... (34 more variables)\n | https://erddap.bco-dmo.org/erddap/metadata/fgdc/xml/bcodmo_dataset_646825_fgdc.xml | https://erddap.bco-dmo.org/erddap/info/bcodmo_dataset_646825/index.htmlTable | https://www.bco-dmo.org/dataset/646825
| https://erddap.bco-dmo.org/erddap/rss/bcodmo_dataset_646825.rss | https://erddap.bco-dmo.org/erddap/subscriptions/add.html?datasetID=bcodmo_dataset_646825&showErrors=false&email= | BCO-DMO | bcodmo_dataset_646825 |