{
    "tag": 7474,
    "title": "Surface water data for samples collected approximately hourly along the West Florida Shelf: USGS Cruise 11BHM03",
    "pubdate": "2013",
    "sername": null,
    "series_name": null,
    "issue": "822",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/spcmsc\/2011_September_Discrete_Samples_Surface.faq.html",
    "format": null,
    "email": null,
    "descript": "The United States Geological Survey (USGS) is conducting a study on the effects of climate change on ocean acidification within the Gulf of Mexico; dealing specifically with the effect of ocean acidification on marine organisms and habitats. To investigate this, the USGS participated in two cruises in the West Florida Shelf and northern Gulf of Mexico regions aboard the R\/V Weatherbird II, a ship of opportunity lead by Dr. Kendra Daly, of the University of South Florida (USF). The cruises occurred September 20 - 28 and November 2 - 4, 2011. Both left from and returned to Saint Petersburg, Florida, but followed different routes (see Trackline). On both cruises the USGS collected data pertaining to pH, dissolved inorganic carbon (DIC), and total alkalinity in discrete samples. Discrete surface samples were taken during transit approximatly hourly on both cruises, 95 in September were collected over a span of 2127 km, and 7 over a trackline of 732 km line on the November cruise. Along with the surface samples, another set of samples were taken at various depths at stations; 27 in September at four stations and 15 in November at five stations. In addition to the discrete samples flow-through data was also collected on both cruises in a variety of forms. Surface CTD data was collected every five minutes which includes temperature, salinity, and pH. In addition, two more flow-through instruments were setup on both cruises that recorded pH and CO2 every 15 minutes. Corroborating the USGS data is the vertical CTD profiles collected by USF, using the following sensors: CTD, oxygen, chlorophyll fluorescence, optical backscatter, and transmissometer. Additionally, discrete depth samples for nutrients, chlorophyll, and particulate organic carbon\/nitrogen were collected.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Robbins, Lisa L.",
            "role": "Author"
        },
        {
            "name": "Knorr, Paul O.",
            "role": "Author"
        },
        {
            "name": "Barrera, Kira E.",
            "role": "Author"
        },
        {
            "name": "Daly, Kendra L.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "153",
            "name": "chemical analysis",
            "scope": "Chemical techniques used to identify the composition of substances."
        },
        {
            "thcode": 2,
            "code": "703",
            "name": "marine chemistry",
            "scope": "Branch of chemistry that deals with the properties, composition, structure, and interaction of substances in the seas and oceans."
        },
        {
            "thcode": 2,
            "code": "2058",
            "name": "ocean acidification",
            "scope": "Decrease in the pH of ocean waters as a result of the increase in atmospheric carbon dioxide concentration."
        },
        {
            "thcode": 23,
            "code": "4",
            "name": "Assessments",
            "scope": "Derived data that provide information about the values, impacts, drivers, connections, or functions of a feature in its present distribution."
        },
        {
            "thcode": 23,
            "code": "20",
            "name": "Physical\/Chemical Features",
            "scope": "Geological, chemical, or hydrodynamic features that are ecologically important or influence patterns of human uses of the ocean. Examples include seamounts, persistent upwelling zones, areas of low dissolved oxygen, and areas of reduced pH. Distributions are recorded observations of parameters and features, often as a function of time as well as place, also including maps and three-dimensional predictions of distributions based on combinations of observations and theory. Distributions of physical and chemical features (for example, physical habitat, substrate, or bathymetry) are often used as data to support habitat-biota models. Assessments provide information about the value, impact, drivers, connections, or functions of a feature in its present distributions, or they evaluate the effects of physical\/chemical features on ecology or suitability for use. Assessments can include climate change models that project environmental effects of climate change and acidification. Larger assessments that combine physical\/chemical features with other Resources and Uses categories can appropriately be included here and also in the other related Resources or Uses categories. Predictions are the results of models or projections of future distributions, values, or impacts, which include anticipated changes produced by natural and human processes, and they are also the results of scenario-testing models for comparing outcomes of different management actions."
        },
        {
            "thcode": 61,
            "code": "494",
            "name": "chemical analysis",
            "scope": "used for all laboratory analyses in support of geochemical or biochemical research."
        },
        {
            "thcode": 61,
            "code": "751",
            "name": "chemical oceanography",
            "scope": "the study of the chemistry of oceans, often with a focus on chemical cycling."
        },
        {
            "thcode": 61,
            "code": "681",
            "name": "environmental chemistry",
            "scope": "the study of chemical processes as they relate to environmental systems."
        },
        {
            "thcode": 61,
            "code": "274",
            "name": "ocean acidification",
            "scope": "changes in ocean chemistry related to the increase of carbon dioxide in the atmosphere."
        }
    ],
    "place_term": [],
    "image": [],
    "fan": [
        "11BHM03"
    ]
}