Reactive nitrogen in and around the northeastern and mid-Atlantic US: sources, sinks, and connections with ozone

Huang, Min; Carmichael, Gregory R.; Bowman, Kevin W.; De Smedt, Isabelle; Colliander, Andreas; Cosh, Michael H.; Kumar, Sujay V.; Guenther, Alex B.; Janz, Scott J.; Stauffer, Ryan M.; Thompson, Anne M.; Fedkin, Niko M.; Swap, Robert J.; Bolten, John D.; Joseph, Alicia T.

doi:https://doi.org/10.5194/acp-25-1449-2025

Articles | Volume 25, issue 3

https://doi.org/10.5194/acp-25-1449-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

Tropospheric Ozone Assessment Report Phase II (TOAR-II) Community...

https://doi.org/10.5194/acp-25-1449-2025

© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 25, issue 3

Research article

|

03 Feb 2025

Research article |

| 03 Feb 2025

Reactive nitrogen in and around the northeastern and mid-Atlantic US: sources, sinks, and connections with ozone

Min Huang, Gregory R. Carmichael, Kevin W. Bowman, Isabelle De Smedt, Andreas Colliander, Michael H. Cosh, Sujay V. Kumar, Alex B. Guenther, Scott J. Janz, Ryan M. Stauffer, Anne M. Thompson, Niko M. Fedkin, Robert J. Swap, John D. Bolten, and Alicia T. Joseph

Supplement

https://doi.org/10.5194/acp-25-1449-2025-supplement

Data sets

SMAP Enhanced L3 Radiometer Global and Polar Grid Daily 9 km EASE-Grid Soil Moisture, Version 5 P. E. O'Neill et al. https://doi.org/10.5067/4DQ54OUIJ9DL

GPM IMERG Final Precipitation L3 1 day 0.1 degree x 0.1 degree, Version 7 G. J. Huffman et al. https://doi.org/10.5067/GPM/IMERGDF/DAY/07

TROPESS CrIS-JPSS1 L2 Ozone for Forward Stream Summary Product, Version 1 K. W. Bowman https://doi.org/10.5067/MHH8R0UZ5BMJ

TROPESS CrIS-JPSS1 L2 Carbon Monoxide for Forward Stream Summary Product, Version 1 K. W. Bowman https://doi.org/10.5067/JL1HT3NGEAW3

TROPESS CrIS-JPSS1 L2 Peroxyacetyl Nitrate for Forward Stream Summary Product, Version 1 K. W. Bowman https://doi.org/10.5067/6HTQB4F81S08

Long Island Sound Tropospheric Ozone Study GCAS and GeoTASO measurements of NO2 and CH2O, Version R1 S. Janz https://www-air.larc.nasa.gov/missions/listos/index.html

NCEP ADP Global Surface Observational Weather Data, October 1999 -- continuing NCEP https://doi.org/10.5065/4F4P-E398

Ozone and other key fields (2018-2024) over the northeastern and mid-Atlantic US modeled by WRF-Chem, relevant to the TOAR-II activity, Version 1 M. Huang https://doi.org/10.5281/zenodo.14703647

Gridded TROPOMI data at TOAR-II Tropospheric Ozone Precursors Focus Group repository I. De Smedt ttps://usf.app.box.com/s/lskz9z3cuxqgv0ckaxxxi8attcuckxxd/folder/157070671575

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Short summary

We use model simulations along with multiplatform, multidisciplinary observations and a range of analysis methods to estimate and understand the distributions, temporal changes, and impacts of reactive nitrogen and ozone over the most populous US region that has undergone significant environmental changes. Deposition, biogenic emissions, and extra-regional sources have been playing increasingly important roles in controlling pollutant budgets in this area as local anthropogenic emissions drop.