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Atmospheric Composition, Weather

Nominally, biomass burning impacts can be categorized through their associated emissions, or their resulting land use modification. Both can perturb the Earth’s energy balance. Smoke particles can induce direct, semi-direct, and indirect forcing. Land use change can impact the surface heat budget and consequently through boundary layer feedbacks, impact cloud properties. In the Maritime Continent (MC, Indonesia, Malaysia, Singapore etc.) meteorology and land use practices result in highly variable seasonal and intra-seasonal burning activity. Consequently, impacts of burning span many spatial and temporal scales and demands attention to meteorological context, and in particular precipitation (e.g., ENSO, ITCZ migration, MJO, local convection etc). In order to begin to unravel the extremely complicated nature of biomass burning in the MC we propose to apply Top-of Atmosphere (TOA) radiation as metric and address the question: “At the top of the atmosphere over the Maritime Continent, how do aerosol direct and semi-direct radiative effects compare to the resulting change in land surface properties (e.g., surface energy budget, and subsequent cloud cover)?” by testing the hypothesis: “At the Top-of-Atmosphere of the Maritime Continent, radiative impact of biomass burning from the land surface and its feedback on clouds is on the same order as the direct radiative and semi-direct effect of smoke particles. ” We propose the formation of an interdisciplinary team to perform a first order scale and uncertainty analysis to test this hypothesis. Components include: a) Fire and emissions characterization: NRL, U. of Maryland, and U. of Wisconsin will utilize MODIS, MTSAT, and ASTER to derive a 10 year record f burning activity and emissions. b) Land surface characterization: U. of Maryland, U. of Alabama, and NRL will apply and refine land surface products to derive an adequate land surface database to feed the radiative analysis and models. c) Meteorology, precipitation, and cloud context: JPL and NRL will analyze available satelltie precipitation and cloud products with model and in situ observation products to provide context to the fire and land surface products as well as model analyses. d) Large scale analyses: NRL, U of Alabama and U. of North Dakota will combine MODIS, MISR, CERES and CALIPSO satelltie products with the NAAPS aerosol model w/ MODIS+MISR data assimilation to derive aerosol flux maps for the MC. e) Fine/mesoscale modeling of the joint land-aerosol-atmosphere system: U. of Alabama and U of Nebraska will employ the RAMS model to test the sensitivity of the atmosphere and cloud cover to land use change and the aerosol semi-direct effect. These components will all feed into an overall assessment of TOA radiative impacts with appropriate meteorological context. Research activities will leverage from other programs to support active cooperation between the land, aerosol and meteorological communities. Members of this team will make use of numerous collaborators though several active field campaigns in the region, including 7 Southeast Asian Studies (7SEAS) and Dynamics of the MJO (DYNAMO) as well another IDS submission by GSFC on biomass burning in SE Asia.

Project PI: Jeffrey Reid/Naval Research Laboratory

Naval Research Laboratory Marine Meteorology Division 7 Grace Hopper Avenue, Stop 2 Monterey, CA 93943-5502

Phone : (831) 656-4725

Fax: (831) 656-4769

Email: jeffrey.reid@nrlmry.navy.mil

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Started: Sep 29, 2010

Last Activity: Mar 16, 2011

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