{
    "tag": 14270,
    "title": "Vertical chemical profiles collected across haloclines in the water column of the Ox Bel Ha cave network within the coastal aquifer of the Yucatan Peninsula in January 2015 and January 2016",
    "pubdate": "20200318",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P9N4H6Y4",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_P9N4H6Y4\/CenoteBang_OPP-gechem-data_2015-2016_meta.faq.html",
    "format": null,
    "email": null,
    "descript": "Natural cave passages penetrating a coastal aquifer in the Yucatan Peninsula (Mexico) were accessed to test the hypothesis that chemoclines associated with salinity gradients (haloclines) within the flooded cave networks of the karst subterranean estuary are sites of methane oxidation. Two field trips were carried out to the fully-submerged cave system located 6.6 km inland from the coastline in January 2015 and January 2016. Vertical chemical profiles across the water column haloclines were obtained using the OctoPiPi (OPP), a high-resolution water sampler built by the U.S. Geological Survey (USGS). The sampling efforts resulted in cm-scale profiles of major ions (e.g., chloride and sulfate), as well as concentrations and stable carbon isotopic values of methane, dissolved organic carbon (DOC), and dissolved inorganic carbon (DIC). Field activities were carried out by the USGS Coastal and Marine Geology Program in conjunction with Texas A&M University at Galveston",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Brankovits, David",
            "role": "Author"
        },
        {
            "name": "Pohlman, John W.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "93",
            "name": "biogeochemical cycling",
            "scope": "The cycling of chemical constituents through a biological system."
        },
        {
            "thcode": 2,
            "code": "141",
            "name": "carbon cycling",
            "scope": "The circulation of carbon in the biosphere, atmosphere, and hydrosphere through a series of processes that include photosynthesis, consumption, and respiration."
        },
        {
            "thcode": 2,
            "code": "142",
            "name": "carbon isotope analysis",
            "scope": "Experimental determination of the proportion of a given stable carbon isotope (C12 or C13) in a sample."
        },
        {
            "thcode": 2,
            "code": "174",
            "name": "coastal ecosystems",
            "scope": "Biological communities and habitats within the narrow zones of land between the margin of oceans or seas and large landmasses."
        },
        {
            "thcode": 2,
            "code": "358",
            "name": "estuarine ecosystems",
            "scope": "Biological communities and habitats within sea inlets or the zones where rivers meet the seas which are subject to tidal effects and the mixture of fresh and saltwater."
        },
        {
            "thcode": 2,
            "code": "1803",
            "name": "estuarine mixing",
            "scope": "Interaction of tidal forcing and river discharge in an estuary, leading to any of three vertical salinity profiles: salt wedge, stratified, or well mixed. We also include mixing due to extreme events such as storm surge."
        },
        {
            "thcode": 2,
            "code": "375",
            "name": "field inventory and monitoring",
            "scope": "Repeated observation or sampling at a site, on a scheduled or event basis, for study and analysis.  In general, this category excludes sampling programs in which materials are obtained in the field and brought back to a laboratory for study and analysis."
        },
        {
            "thcode": 2,
            "code": "419",
            "name": "freshwater ecosystems",
            "scope": "Biological communities and habitats that exist in lakes, rivers, ponds, and other bodies of water that are not salty."
        },
        {
            "thcode": 2,
            "code": "513",
            "name": "groundwater",
            "scope": "All water that exists beneath the land surface, but more commonly applied to water in fully saturated soils and geologic formations."
        },
        {
            "thcode": 2,
            "code": "554",
            "name": "hydrogeology",
            "scope": "Study of subsurface waters and geologic aspects of surface waters."
        },
        {
            "thcode": 2,
            "code": "560",
            "name": "hydrology",
            "scope": "Branch of earth science that deals with water as it occurs in the atmosphere, on the surface of the ground, and underground."
        },
        {
            "thcode": 2,
            "code": "1010",
            "name": "salinity",
            "scope": "Measure of the concentration of salts dissolved in a solution."
        },
        {
            "thcode": 15,
            "code": "007",
            "name": "environment",
            "scope": "Environmental resources, protection and conservation, for example environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape, water quality, air quality, environmental modeling"
        },
        {
            "thcode": 15,
            "code": "012",
            "name": "inlandWaters",
            "scope": "Inland water features, drainage systems and characteristics, for example rivers and glaciers, salt lakes, water utilization plans, dams, currents, floods and flood hazards, water quality, hydrographic charts, watersheds, wetlands, hydrography"
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5e503065e4b0ff554f72d6be\/?name=CenoteBang_OPP-gechem-data_2015-2016_browse.jpg",
            "description": "Browse graphic of the conceptual model of the karst subterranean estuary in an unconfined coastal aquifer setting (top). Mixing between freshwater and marine-derived saline groundwater occurs within the aquifer\u2019s porous geologic setting, including its sinkholes and cave conduits. Mixing zones were accessed through flooded cave networks to obtain high-resolution vertical profiles of chemical parameters (bottom box). Samples were collected with 12-cm spacing in (a) January 2015 and (b) January 2016, as well as with the 2.5-cm spacing (c) in January 2016. The blue line is the sulfate to chloride ratio (0.0515) of the regional seawater."
        }
    ],
    "fan": [
        "2016-003-FA",
        "2015-013-FA"
    ]
}