An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock ( ) or https://
means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Search Data.gov
Found 1298 dataset(s) matching "atmospheric composition".
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:01 AM
WNA-FLEXPART-BackTraj-2014 is the 2014 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:01 AM
WNA-FLEXPART-BackTraj-2018 is the 2018 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 29, 2025 at 08:54 PM
WNA-FLEXPART-BackTraj-2015 is the 2015 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 12, 2025 at 05:52 PM
WNA-FLEXPART-BackTraj-1994 is the 1994 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:01 AM
WNA-FLEXPART-BackTraj-2019 is the 2019 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 23, 2025 at 08:41 PM
WNA-FLEXPART-BackTraj-2020 is the 2020 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: November 04, 2025 at 09:25 PM
WNA-FLEXPART-BackTraj-2010 is the 2010 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 29, 2025 at 01:55 AM
WNA-FLEXPART-BackTraj-2001 is the 2001 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 20, 2025 at 08:27 PM
WNA-FLEXPART-BackTraj-2002 is the 2002 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 17, 2025 at 07:33 PM
WNA-FLEXPART-BackTraj-1994-2021-Merge is the combined 1994-2021 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product...
Updated: 2025-09-11
|Harvested: October 25, 2025 at 08:46 PM
WNA-FLEXPART-BackTraj-2003 is the 2003 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 27, 2025 at 08:48 PM
WNA-FLEXPART-BackTraj-1995 is the 1995 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:02 AM
WNA-FLEXPART-BackTraj-2004 is the 2004 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:02 AM
WNA-FLEXPART-BackTraj-2013 is the 2013 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:02 AM
WNA-FLEXPART-BackTraj-2007 is the 2007 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:02 AM
WNA-FLEXPART-BackTraj-2005 is the 2005 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 13, 2025 at 05:52 PM
WNA-FLEXPART-BackTraj-2009 is the 2009 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: October 22, 2025 at 08:27 PM
WNA-FLEXPART-BackTraj-2000 is the 2000 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:01 AM
WNA-FLEXPART-BackTraj-2021 is the 2021 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...
Updated: 2025-09-11
|Harvested: September 14, 2025 at 12:02 AM
WNA-FLEXPART-BackTraj-1996 is the 1996 Western North America Back Trajectory data using the FLEXible PARTicle (FLEXPART) dispersion model. Data collection for this product is complete.Backward...