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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 793 records · Page 44
All sourcesNASA NTRSDOE OSTI
DOE OSTI2023

AmeriFlux US-INb INFLUX - Golf Course

This is the AmeriFlux version of the carbon flux data for the site US-INb INFLUX - Golf Course. Site Description - Turfgrass site, highly managed

Davis, Kenneth↗
DOE OSTI2023

AmeriFlux US-INf INFLUX - East 21st St (Site 2)

This is the AmeriFlux version of the carbon flux data for the site US-INf INFLUX - East 21st St (Site 2). Site Description - Urban site. Tower is a lattice communications tower.

Davis, Kenneth↗
DOE OSTI2023

AmeriFlux US-INg INFLUX - Wayne Twp Comm (Site-7)

This is the AmeriFlux version of the carbon flux data for the site US-INg INFLUX - Wayne Twp Comm (Site-7). Site Description - Urban site, tower is a lattice communications tower

Forsythe, Brandon R↗
DOE OSTI2023

AmeriFlux US-RGF Stanislaus County Forage Farm

This is the AmeriFlux version of the carbon flux data for the site US-RGF Stanislaus County Forage Farm. Site Description - Commercially farmed field in Stanislaus County, California. Part of a multi-year, ground-truthing field study under the DOE ARPA-E SMARTFARM project (https://arpa-e.energy.gov/news-and-media/blog-posts/smartfarm-changing-whats-possible-agriculture). Field is approx. 31.3 ha in size (1,300 ft by 2,600 ft), part of a 176+ acre site in several fields with commercial corn-wheat rotation for silage, in combination with manure application.

Schuppenhauer, Michael R.↗
DOE OSTI2023

AmeriFlux US-UTB UFLUX Bonneville Salt Flats

This is the AmeriFlux version of the carbon flux data for the site US-UTB UFLUX Bonneville Salt Flats. Site Description - Enclosed in fence; Piezometers nearby; Replaced smaller standard station BFLAT

Ladig, Kathryn↗
DOE OSTI2023

AmeriFlux AR-Cel CELPA Mar Chiquita BA

This is the AmeriFlux version of the carbon flux data for the site AR-Cel CELPA Mar Chiquita BA. Site Description - The site is located at a mid-latitude South Atlantic pristine salt marsh. It occupies 43 km2 of an extended marginal flat surrounding a 25 km long brackish lagoon connected with the Argentine Sea through an inlet channel. The small tide amplitude prevents extensive waterlogging with salt water. Unlike other Northern Hemisphere salt marshes regularly flooded by daily tides, Mar Chiquita soaks throughout the winter with approximately a 10 cm freshwater layer coming from rains, and during summer high temperatures and high evapotranspiration dry the soil, producing a thin salt crust on the surface. Another significant difference is that the canopy persists throughout the year without dying out, due to the lack of snowfall or below-freezing winter temperatures.

Gassmann, Maria Isabel↗
DOE OSTI2023

AmeriFlux US-EA5 Uvalde Ranch Mesquite Woodland

This is the AmeriFlux version of the carbon flux data for the site US-EA5 Uvalde Ranch Mesquite Woodland. Site Description - This tower was located on a private ranch located approximately 25 km northwest of Uvalde, TX. The tower was installed on a trailer and situated amongst primarily mesquite trees. The lat/long provided here is approximate as the landowner wishes to maintain anonymity.

McKinney, Tyson↗
DOE OSTI2023

AmeriFlux US-GL1 Stannard Rock

This is the AmeriFlux version of the carbon flux data for the site US-GL1 Stannard Rock. Site Description - Stannard Rock is located 39 km from the nearest shore (Keweenaw Peninsula) in Lake Superior, 44 miles NNE of Marquette, Michigan, and 24 miles ESE of Manitou Island. The site is located on the historic Stannard Rock Lighthouse, which was completed in 1882. Eddy covariance instrumentation was installed in 2008 by a network of scientists from both US and Canada, eventually to be called the Great Lakes Evaporation Network (GLEN). The intent of GLEN has been to provide observations of over-lake meteorology and evaporation, improve forecasting of Great Lakes water levels, and support a wide variety of stakeholders, including the National Weather Service (NWS), Environment and Climate Change Canada, National Oceanic and Atmospheric Administration, U.S. Coast Guard, recreational boaters and commercial shipping, emergency management officials, and the Great Lakes research community. The eddy covariance station along with other ancillary meteorological instrumentation is located at an approximate elevation of 39.2 meters above mean lake water level. Meteorological data from the lighthouse are sent to the National Data Buoy Center, where they can be viewed in real-time at http://www.ndbc.noaa.gov/station_page.php?station=stdm4 Uncorrected half-hour fluxes were computed directly on the logger using a 30-minute block averaging period as high-frequency data were not available. The half hour flux measurements downloaded from the datalogger were post-processed with the following filters and corrections. Latent and sensible heat and carbon dioxide fluxes were corrected with 2-D coordinate rotation. Although the primary objective of data collection at Stannard Rock was to quantify the evaporative flux, additional preliminary measurements of the carbon dioxide concentration and flux from the LI-7500 are also included in this dataset but it is advised to use the carbon data with caution. Carbon data reported in this dataset includes turbulent fluxes of CO2 with no storage correction (FC, µmol m-2 s-1) and CO2 density in mole fraction of wet air (CO2), which was originally output on the datalogger as average CO2 density (mg m-2 s-1) and converted into µmol mol-1 using air temperature and pressure in post-processing. Webb, Pearman, and Leuning terms were applied to account for density fluctuations for water vapor and CO2. Sonic path length, high-frequency attenuation and sensor separation were accounted for according to Horst and Massman, and the oxygen absorption correction for the KH2O hygrometer was also applied. Latent and sensible heat fluxes were assumed to be unrealistic above an absolute value of 1000 W m-2 and were removed. Both carbon flux (FC) and carbon dioxide mole fraction in wet air (CO2) and were assumed to be unrealistic above 1000 µmol m-2 s-1 and 1000 µmol mol-1 respectively. Spikes in latent and sensible heat and carbon fluxes and densities (often due to periods of precipitation) were identified by computing the mean and standard deviation over a moving, overlapping window of 336 half-hours (7 days), similar to Shao et al., and were removed when the flux was more than 1.5 standard deviations from the moving window’s mean. While Vickers and Mahrt use a threshold of 3.5 standard deviations from the mean, a conservative value of 1.5 was chosen due to the noisy nature of over-lake data at this particular site. This process was repeated twice for latent and sensible heat, and carbon dioxide fluxes and densities and therefore it is possible that some real, realistic data was filtered out in this process. No detrending was performed. As per AmeriFlux standards, no friction velocity (USTAR, m s-1) filtering was performed.

Spence, Chris↗
DOE OSTI2023

AmeriFlux US-UTN UFLUX Nephi

This is the AmeriFlux version of the carbon flux data for the site US-UTN UFLUX Nephi. Site Description - This tower is located in between 3 agricultural pivots in a rural valley of Utah. It is within 100 meters of SCAN station 2137. Crops include soybeans, corn, and wheat. The tower was installed for a temporary project.

Inkenbrandt, Paul↗
DOE OSTI2023

AmeriFlux US-BWa INFLUX - NIST Turfgrass Site

This is the AmeriFlux version of the carbon flux data for the site US-BWa INFLUX - NIST Turfgrass Site. Site Description - Turfgrass site on NIST campus, periodic mowing at site.

Davis, Kenneth↗