FLEXPART Influence Functions for ACT-America, 2016-2017

Published by ORNL_DAAC | National Aeronautics and Space Administration | Metadata Last Checked: October 21, 2025 | Last Modified: 2025-09-11

This dataset contains a set of Lagrangian particle dispersion simulations of carbon dioxide concentrations using the FLEXible PARTicle (FLEXPART) model. FLEXPART quantified the source-receptor relationships, so-called "influence functions", in a backward mode. The simulations were constructed for five Atmospheric Carbon and Transport America (ACT-America) deployments over the eastern U.S. that occurred in 2016-2019. Each receptor of the influence function is the 30-second or 10-minute interval along flight tracks, characterized by a box with boundaries between the maximum and minimum latitude/longitude as well as between the maximum and minimum altitudes during the interval. Each receptor box released 5,000 particles and simulated their transport and dispersion backward for 10 or 20 days. The simulations were driven by 27-km meteorology provided by the WRF-Chem simulation or by ERA-Interim data from the European Centre for Medium-Range Weather Forecasts (ECMWF). Background levels of carbon dioxide were obtained from CarbonTracker and OCO-2 v9 MIP. The data are provided in netCDF and FLEXPART binary formats.

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Complete Metadata

bureauCode	[ "026:00" ]
identifier	10.3334/ORNLDAAC/2018
landingPage	https://search.earthdata.nasa.gov/search?q=FLEXPART_Influence_Functions_2018&ac=true
programCode	[ "026:000" ]
spatial	[[{"WestBoundingCoordinate":-170.0,"NorthBoundingCoordinate":70.1,"EastBoundingCoordinate":5.0,"SouthBoundingCoordinate":-10.01}],"CARTESIAN"]
temporal	2016-07-18/2016-07-18
theme	[ "Earth Science" ]