Science Data Catalog submission - USGS:0eaedcc3-8672-41bd-ac3d-7d604968ba34
Dates
Publication Date
2023-07-21
Start Date
2021-05-27
End Date
2022-12-31
Citation
Ward, Eric J, Merino, Sergio L, Stagg, Camille L, and Krauss, Ken W, 20230721, AmeriFlux BASE US-LA2 Salvador WMA Freshwater Marsh, ver. 3-5: , https://doi.org/10.17190/AMF/1543387.
Summary
Wind speed, wind direction (3D) and gas concentrations are measured at 10 Hz and statistically processed using the eddy covariance technique to half-hour estimates of flux rates of gas exchange between the ecosystem and atmosphere. Three gases were measured: carbon dioxide, methane and water vapor. Simultaneous measurements of environmental drivers are also measured and recorded as half-hourly values: photosynthetic photon flux density, downwelling and upwelling short and long wave radiation, air temperature, relative humidity and precipitation. Variable names and units follow AmeriFlux and FLUXNET standards. This site is a flotant herbaceous freshwater marsh in Salvador Wildlife Management Area near Luling, LA.
Summary
Wind speed, wind direction (3D) and gas concentrations are measured at 10 Hz and statistically processed using the eddy covariance technique to half-hour estimates of flux rates of gas exchange between the ecosystem and atmosphere. Three gases were measured: carbon dioxide, methane and water vapor. Simultaneous measurements of environmental drivers are also measured and recorded as half-hourly values: photosynthetic photon flux density, downwelling and upwelling short and long wave radiation, air temperature, relative humidity and precipitation. Variable names and units follow AmeriFlux and FLUXNET standards. This site is a flotant herbaceous freshwater marsh in Salvador Wildlife Management Area near Luling, LA.
For this project, we established two monitoring stations: the first within the receiving basin of the active Davis Pond diversion (this site, US-LA2), and the second in the receiving basin of the planned Mid-Barataria Sediment diversion (US-LA3). These monitoring sites use eddy-covariance techniques to provide real-time, high-resolution (half-hourly) data on ecosystem water and carbon fluxes to the atmosphere, which provide comprehensive estimates of net ecosystem exchange and serve as an indicator of ecosystem health. These data provide critical components to estimates of the ecosystem carbon budget, making this site one of only a handful of coastal wetlands in the country to currently have such comprehensive carbon characterization. The monitoring stations collect the baseline information necessary to evaluate impacts of the diversion project. Much like a heart rate monitor on a hospital patient, this kind of high-resolution data on ecosystem carbon exchange is critical to evaluating the impacts of the diversion in real-time.
