{
  "accessLevel": "public",
  "bureauCode": [
    "010:12"
  ],
  "contactPoint": {
    "@type": "vcard:Contact",
    "fn": "Karen M Thorne",
    "hasEmail": "mailto:kthorne@usgs.gov"
  },
  "description": "Water levels are an important driver of salt marsh processes. In Humboldt Bay, CA, water-level data loggers were deployed in the tidal channels of two USGS study marshes (Mad River marsh and Hookton marsh). From 03/16/2016 to 12/08/2016, Onset-Hobo loggers (Model U-20-001-01-Ti, Onset Computer Corp., Bourne, MA, USA; +/-0.5cm or 0.005 meters accuracy), with a combined barometric pressure sensor, were deployed. The Hobo loggers were replaced by higher accuracy Solinst-Edge LT water-level and Barologgers (Model 3001, Solinst Canada Ltd., Georgetown, Ontario, Canada; +/- 0.3 cm or 0.003 meters accuracy) which were deployed from 12/08/2016 to 09/05/2019. The water-level sensors were placed as low in the tide frame as possible, while still maintaining access to the sensors at low tide. The sensors captured water levels during high tides; but sensor elevations were too high to capture water levels during low tides. The Solinst water-level loggers, deployed in the two study marshes, were programmed to record continuous measurements of absolute pressure, air temperature, and water temperature on a 6-minute timestep. A single barometric pressure logger can be used to correct water-level data within a 30km radius and/or 300 m change in elevation. A single Solinst barometric logger, deployed at the USFWS Humboldt Bay Wildlife Refuge Complex Headquarters Office (https://www.fws.gov/refuge/humboldt-bay), and recorded barometric pressure on a 6 -minute timestep. Following deployment, sensor elevations were surveyed using Real-Time Kinematic GPS (Leica GS-15, Leica Geosystems, Norcross, GA, USA) relative to the North American Vertical Datum of 1988 (NAVD88). The water-level height data collected at Hookton and Mad River marshes was atmospherically corrected using the barometric data. The corrected water-level height data were converted to water-level elevations relative to NAVD88.",
  "distribution": [
    {
      "@type": "dcat:Distribution",
      "accessURL": "https://doi.org/10.5066/P9QLAL7B",
      "description": "Landing page for access to the data",
      "format": "XML",
      "mediaType": "application/http",
      "title": "Digital Data"
    },
    {
      "@type": "dcat:Distribution",
      "description": "The metadata original format",
      "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.622be8ccd34ec9f19eea444b.xml",
      "format": "XML",
      "mediaType": "text/xml",
      "title": "Original Metadata"
    }
  ],
  "identifier": "http://datainventory.doi.gov/id/dataset/USGS_622be8ccd34ec9f19eea444b",
  "keyword": [
    "California",
    "Hookton marsh",
    "Humboldt Bay",
    "Humboldt County",
    "Mad River marsh",
    "USGS:622be8ccd34ec9f19eea444b",
    "biota",
    "estuarine processes",
    "inundation",
    "marsh ecosystems",
    "salt marsh",
    "water level"
  ],
  "modified": "2022-09-19T00:00:00Z",
  "publisher": {
    "@type": "org:Organization",
    "name": "U.S. Geological Survey"
  },
  "spatial": "-124.2713, 40.6765, -124.0796, 40.9107",
  "theme": [
    "geospatial"
  ],
  "title": "Water level and barometric pressure measurements in two salt marshes, Humboldt Bay, CA, 2016-2019"
}