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The Southeast Atmosphere Study (SAS) is a collaboration that brings together resources and facilities from NSF, NOAA, EPA, and EPRI. The SAS is the "umbrella" for the NOMADSS, SOAS, NAAMEX, TROPHONO, and SENEX projects. SAS's main purpose is to ensure that the objectives of the individual projects are coordinated.
The field phase for the SAS will be 1 June 2013 through 15 July 2013 and is generally focused in the southeastern United States. All airborne platforms (i.e., NSF/NCAR C-130, NOAA WP-3D, Purdue Duchess, and Stonybrook Long-EZ) and ground based facilities (i.e. Centreville and Alabama Aquatic Biosdiversity Centre (AABC), Alabama; Look Rock, Tennessee; and Research Triangle Park (RTP), North Carolina) are involved in the SAS. The individual project descriptions and objectives are described below.
The Nitrogen, Oxidants, Mercury and Aerosol Distributions, Sources and Sinks (NOMADSS) project integrates three proposed studies: the Southern Oxidant and Aerosol Study (SOAS), the North American Airborne Mercury Experiment (NAAMEX), and the TROPospheric HONO (TROPHONO).
The merger of the SOAS, NAAMEX, and TROPHONO field campaigns on the C-130 platform provides the opportunity to address the objectives and science questions for the three respective projects summarized below.
NOMADSS Principal Investigator: Dan Jaffe, UW
The SOAS objectives include the direct quantification of VOC, ozone and NOx surface fluxes and reconcile differences with "blank-down" emission estimates; better understanding of HOx/NOx/ozone/organics/aerosol distributions, sources and sinks.
SOAS plans to address the following science questions:
The primary goals for NAAMEX are to:
These goals will be fully met in the merged project. The merger represents a significant opportunity to conduct detailed sampling in the most concentrated Hg source region in North America as well as flights into the middle and upper troposphere where models suggest a significant source of oxidized Hg. The NOMADSS payload includes the key NAAMEX measurements, plus fast VOC measurements that will help in source identification. The data on HONO will provide an additional constraint on oxidation processes, which are poorly understood for Hg.
The objectives for TROPHONO are:
TROPHONO Principal Investigator: Xianliang Zhou, Wadsworth Center and SUNY Albany
The SENEX project goal is to use the NOAA P-3 aircraft to
in order to answer five specific science questions:
SENEX Principal Investigator: Joost DeGouw, NOAANOAA SENEX Web Page
Unless otherwise noted, photos courtesy of Carlye Calvin, University Corporation for Atmospheric Research.