Update on WestJump model runs Mike Barna May 13, 2013 National Park Service U.S. Department of the Interior

WestJump and NPS policy issues WestJump is an ideal platform to ask questions about western US air quality: “where are the problem areas?” Base case run “who is contributing to the problem?” Source apportionment run “how would the problem respond to changing emissions?” DDM run “what will this look like in the future?” Future base case run

CAMx source apportionment run Emission sectors: O&G EGU’s Mobile Area Biogenic Performed by Environ as a ‘pilot study’ for WestJump Use CAMx APCA

CAMx emission response run Emission sectors: O&G EGU’s Mobile Area Biogenic Perform in-house at NPS/CIRA Use CAMx DDM