Calendar Event Details
AEROCENTER: Yingxi Shi
Affiliation: NASA GSFC/USRA
Event Date: Tuesday, February 28, 2017
Location: G133
Time: 11:00 AM
A STUDY OF AEROSOL REGIONAL CLIMATOLOGY AND RADIATIVE EFFECTS USING AN EVENT-BASED MODIS AEROSOL PRODUCT UNDER HIGH AEROSOL LOADING CONDITIONS
High aerosol loading events, such as the Indonesia’s forest fire in Fall 2015 or the persistent wintertime haze near Beijing, gain tremendous interests due to their large impact on regional visibility and air quality. Understanding the optical properties of these events and further being able to simulate and predict these events are beneficial. However, it is a great challenge to consistently identify and then retrieve aerosol optical depth (AOD) from passive sensors during heavy aerosol events. Thus, even under clear-sky conditions, the global distribution of extreme aerosol events is not well captured in datasets such as the MODIS Dark-Target (DT) aerosol product. In this study, with the synthetic use of OMI Aerosol Index, MODIS cloud product, and operational DT product, the heavy smoke events over the Indonesia region are identified and retrieved over the dry season. An event based aerosol product that would compensate the standard “global” aerosol retrieval is created and evaluated. Using the research product, near 20% of 0.5° grid points over Indonesia region has an increased AOD of 1.0 and above. The impact of missing high AOD retrievals on the regional aerosol climatology is studied using this newly developed research product. The aerosol direct radiative effects (ADE) over the Indonesia region is calculated using Libradtran and an AERONET based smoke particle model that is a function of aerosol loading. The uncertainties of the estimated ADE are analyzed. Our study shows that the domain averaged over land ADE increased by 14 W/m2 in Sept and Oct. Over the region where severe burning occurs the increased ADE reaches 30 W/m2.
Posted or updated: Monday, February 27, 2017
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