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Atmospheric Composition

In response to NASA's Strategic Goals 3A.1, 3A.2, & 3A.7 in the ROSES-2007 NIP call, we propose to investigate the transport of Central American smoke aerosols and their impact on air quality, clouds, and precipitation over the United States. The two project objectives are to: (1) quantitatively assess the effect of Central American smoke aerosols on air quality over the southern and central United States, with an emphasis on understanding the intra-annual and inter-annual variability of smoke emissions as well as the smoke transport process; (2) investigate the effect of Central American smoke particles on clouds and precipitation over the southern and central United States, with an emphasis on understanding the role of smoke particles in deep convection. To achieve these objectives, we will analyze the EOS data and ground-based observations over the United States and integrate them with our model simulations. We will use a global chemistry model (GEOS-Chem) and a regional meteorology model (RAMS-AROMA) with aerosol transport and radiative effects to derive the distribution of non-smoke and smoke aerosols in our study region. The simulation will be combined with aerosol products from MODIS, MISR, CALIPSO, and ground-based instruments to better characterize the spatiotemporal variation of smoke aerosols. The smoke aerosol distribution will then be correlated with the cloud products from MODIS and CloudSat as well as precipitation data from TRMM and ground-based observations to identify the smoke signature in the cloud microphysical properties. To separate the compounding factors between smoke effect and metrological effects on clouds, statistical analysis will be conducted for days that have similar synoptic patterns but different air masses, with and without contamination of smoke particles. To understand the smoke effect on cloud life time, cloud resolving model simulation will be carried out for smoke-cloud interaction in various synoptic regimes. Key findings will be published in peer-reviewed scientific journals and delivered to the relevant federal and local agencies. The P.I.'s interdisciplinary collaborations with partners from NASA, NOAA, and Colorado State University will strengthen his plan of work and broader the project's impact. This project will also build educational modules for K-12 educators in Nebraska on using NASA's satellite products to view severe weather and other atmospheric phenomena. The module series, "View Weather from Space", will be made available to the public through collaboration with the NASA Nebraska Space Grant Consortium, Nebraska Department of Education, and Earth Science Institute for Elementary Educators (ESIEE) that is now funded by NASA. The modules will be revised after each workshop with K-12 educators. Upon completion of this proposed project, all the modules will be integrated as part of a graduate-level course in the curriculum of University of Nebraska - Lincoln for distance education.

Project PI: Jun Wang/University of Nebraska - Lincoln

Department of Geosciences University of Nebraska - Lincoln 303 Bessey Hall Lincoln, NE, 68588-0340

Phone: 402-472-3597

Fax: 402-472-4917

Email:  jwang7@unl.edu

http://eas.unl.edu/~jwang/

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Started: Aug 09, 2010

Last Activity: Dec 09, 2010

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