Filters: Tags: {"type":"USGS Scientific Topic Keyword"} (X) > partyWithName: Lisamarie Windham-Myers (X)

Filters Date Range Past year (1) Past month (0) Past week (0) Past day (0) Custom range... To   Search Types Map Service (3) OGC WFS Layer (3) OGC WMS Layer (3) OGC WMS Service (3) Contacts U.S. Geological Survey U.S. Geological Survey - ScienceBase Brian Bergamaschi Monica M Moritsch Water Resources More... Categories Data (2) Tags (with Type=USGS Scientific Topic Keyword ) ecology (3) environmental health (1) geochemistry (1) land use change (1) remote sensing (1) soil sciences (1) water quality (1) More... View Results as: JSON ATOM CSV

Tidal hydrologic and constitutent loads from First Mallard Water Quality Station in the Rush Ranch Marsh Complex of the San Francisco Bay Estuarine Research Reserve (SFBNERR) 2016-2018 The data herein report continuous field measurements and specific discrete sampling events associated with water quality and carbon consitutents – both dissolved and particulate forms. These data were coupled with atmospheric flux measurements during the 2017-18 water year to estimate the net storage of fixed carbon within the marsh on an areal basis. Direct and indirect measurement showed 47 to 59% of fixed carbon is stored on site, and most loss is through dissolved inorganic carbon (DIC) export. Comparing this with other tidal wetlands in the U.S. showed similar rates of loss, and a global meta-analysis showed that lateral loss is a proportionally larger term in coastal wetland carbon budgets, relative to other... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ecology, USGS Science Data Catalog (SDC), Water Resources, atmospheric properties, carbon cycling, All tags... environment, wetlands, Fewer tags High resolution and discrete temporal and spatial water-quality measurements in support of modeling mercury and methylmercury concentrations in surface waters of the Sacramento-San Joaquin River Delta The Sacramento / San Joaquin River Delta (SSJRD) is contaminated with legacy mercury (Hg) from historical mining and mineral processing activities throughout the watershed, as well as from contemporary atmospheric and industrial inputs. The current project was designed for the purpose of developing high-resolution spatial and temporal models for estimating concentrations of mercury species in surface waters of the SSJRD. The field component of the project brings together three high-resolution platforms for collecting water-quality data (fixed continuous monitoring stations (CMS) outfitted with in-situ sensors, spatial mapping using boat-mounted flow-through sensors, and satellite-based remote sensing) coupled with... Categories: Data; Tags: California, Environmental Health, Geochemistry, Lower Sacramento, Remote Sensing, All tags... Sacramento, San Francisco Bay, San Joaquin Delta, Solano, USGS Science Data Catalog (SDC), Water Quality, Yolo, chemical analysis, environment, environmental proxies, field inventory and monitoring, field monitoring stations, field sampling, mercury, mercury analysis, mercury contamination, optical methods, remote sensing, suspended material (water), transect sampling, water chemistry, water column reflectivity, water properties, water sampling, water sampling, Fewer tags Biomass Carbon Stock and Net Primary Productivity in Tidal Herbaceous Wetlands of the Conterminous United States Product Description: This dataset provides maps of peak biomass carbon stock (C) in gC/m2 and net primary productivity (NPP) in gC/m2/yr of coastal herbaceous wetlands at a resolution of 30 m across the conterminous United States (CONUS) for 2015. Aboveground, belowground, and total peak biomass C and NPP are provided for tidal herbaceous wetlands. Data is presented for 1. all herbaceous/emergent marshes, 2. palustrine emergent marshes and 3. estuarine emergent marshes. Background: Spatial assessments of greenhouse gas emissions and carbon sequestration in natural ecosystems are necessary to develop climate mitigation strategies. Regional and national-level assessments of carbon sequestration require high-resolution... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Biological Productivity, Biomass, Blue Carbon, Carbon Sink, Ecology, All tags... Remote Sensing, USGS Science Data Catalog (SDC), United States, Fewer tags Harmonizing wetland soil organic carbon datasets to improve spatial representation of 2011 soil carbon stocks in the conterminous United States These datasets represent a revised national scale estimate of wetland soil carbon stock assessments by improving representation of soil organic carbon densities. This assessment is based on a three-step approach to harmonize survey and point-based data for predicting soil organic carbon density from percent organic carbon alone (or percent organic matter, with conversion), when reliable dry bulk density information is not available. Given issues with survey-level extrapolation of soil pedons into discontinuous hydric soils, quantile, segmented data analysis provides a more accurate spatially explicit soil organic carbon density product. These modeled data leverage spatial and statistical distributions of soil organic... Tags: CONUS, Soil Sciences, USGS Science Data Catalog (SDC), biota, bulk density, All tags... hydric soil, inland, soil chemistry, soil horizons, soil organic carbon, tidal, wetland, Fewer tags Projected future habitat, elevation change, and carbon accumulation of coastal wetlands in the Nisqually River Delta, Washington This dataset consists of raster geotiff outputs from modeling habitat change, marsh vertical accretion, and carbon accumulation in the Nisqually River Delta, Washington, USA. These rasters represent projections of future habitat type, change in surface elevation above Mean Sea Level, and total sediment carbon accumulation since 2011 in coastal wetland habitats. Projections were generated in 20-year increments for 100 years for five amounts of sea-level rise, three amounts of suspended sediment concentrations, and two alternative configurations of the U.S. Interstate-5 causeway as it crosses the Nisqually River to either prevent or allow inland habitat migration (a total of 30 scenarios). The full methods and results... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ecology, Land Use Change, Nisqually, Pierce County, Thurston County, All tags... USGS Science Data Catalog (SDC), Washington (WA), Wildlife Biology, effects of climate change, Fewer tags