Seasonal changes in aerosol characteristics over Arabian Sea and their consequence on aerosol short-wave radiative forcing: Results from ARMEX field campaign |
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| Institution: | 1. School of Geography Sciences, East China Normal University, Shanghai 200241, PR China;2. School of Ecological and Environmental Sciences, East China Normal University, Shanghai 200241, PR China;3. Shanghai Key Lab for Urban Ecological Processes and Eco-restoration, East China Normal University, Shanghai 200241, PR China;4. Center for Ecological Wisdom and Practice Research, College of Architecture and Urban Planning, Tongji University, Shanghai 200092, PR China;1. Departamento de Física, Universidad de Extremadura, Badajoz, Spain;2. Departamento de Física Aplicada, Universidad de Granada, Granada, Spain;3. Andalusian Institute for Earth System Research (IISTA-CEAMA), Granada, Spain;4. Grupo de Óptica Atmosférica, Universidad de Valladolid, Valladolid, Spain;5. Departamento de Física Aplicada II, Universidad de Málaga, Málaga, Spain |
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| Abstract: | Extensive and collocated measurements of several aerosol parameters were made over the eastern Arabian Sea, during the inter-monsoon and summer monsoon seasons of 2003 as a part of the Arabian Sea Monsoon Experiment (ARMEX). Associated with the seasonal changes in the synoptic wind fields from northeasterly/easterly to westerly/northwesterly, the aerosol characteristics and columnar optical depth show large variations. Consequently, the atmospheric forcing is found to increase from March to April and then to decrease consistently towards June. However, the magnitude of the forcing efficiency of aerosols continuously decreases from winter to summer. Such temporal changes in radiative forcing need to be accounted for in reducing the uncertainty in aerosol climate impact. |
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