You are here:
Modeling Analysis of Multi-Decadal Trends in Ozone and Precursor Species across the Northern Hemisphere and the United States
Citation:
Mathur, R., J. Xing, D. Kang, S. Napelenok, C. Hogrefe, G. Sarwar, AND Jon Pleim. Modeling Analysis of Multi-Decadal Trends in Ozone and Precursor Species across the Northern Hemisphere and the United States. ENV-VISION Conference, Washington, DC, May 10 - 11, 2016.
Impact/Purpose:
The National Exposure Research Laboratory (NERL) Computational Exposure Division (CED) develops and evaluates data, decision-support tools, and models to be applied to media-specific or receptor-specific problem areas. CED uses modeling-based approaches to characterize exposures, evaluate fate and transport, and support environmental diagnostics/forensics with input from multiple data sources. It also develops media- and receptor-specific models, process models, and decision support tools for use both within and outside of EPA.
Description:
The WRF-CMAQ modeling system was applied over a domain encompassing the northern hemisphere and a nested domain over the U.S. Model simulations for the 1990-2010 were performed to examine trends in various air pollutant concentrations. Trends in O3 mixing ratios over the U.S. are analyzed and relationships with changing long-range transport is investigated. CMAQ configured with the direct decoupled method is used to estimate source region contributions to O3 levels in the receptor region. These are then combined with the multi-decadal simulations to delineate the trends in the relative contributions of different source regions across the northern hemisphere to background O3 levels in the U.S.
URLs/Downloads:
http://www.epri.com/Pages/ENV-VISION-Second-Annual-International-Electricity-Sector-Conference.aspx