Abstract
Aerosol optical depth (AOD) is a measure of aerosol loading in an atmospheric column. The satellite-based measurements can cover a large area, providing a means to study aerosol effects at a global scale. However, in the early years, such datasets are only available over the ocean, such as from the AVHRR measure- ments. TOMS is the first satellite sensor capable of deriving aerosol properties over both land and ocean but the measurement accuracy has been affected by its large footprint (∼50 km) and strong altitude dependence. MODIS (Salomonson et al., 1989) is one of the sensors designed to measure aerosol properties onboard the EOS (Earth Observing System) Terra (launched on 18 December, 1999) and Aqua (launched on 4 May, 2002) satellites launched into Sun-synchronous orbits with equator-crossing times at around 10:30 a.m. and 1:30 p.m. respectively. The unique set of seven MODIS channels (0.47, 0.55, 0.67, 0.87, 1.24, 1.64, and 2.1 µm) with 250 – 500 m resolutions enables us not only to derive aerosol optical depth but also other parameters, for example, fine-mode fraction over land and fine-mode fraction and effective radius over ocean. It is expected to aid significantly in studying aerosol effects on Earth’s energy budget and hydrological cycle.
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© 2006 Tsinghua University Press, Beijing and Springer-Verlag GmbH Berlin Heidelberg
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Chu, D.A., Remer, L. (2006). MODIS Observation of Aerosol Loading from 2000 to 2004. In: Qu, J.J., Gao, W., Kafatos, M., Murphy, R.E., Salomonson, V.V. (eds) Earth Science Satellite Remote Sensing. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-37293-6_6
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DOI: https://doi.org/10.1007/978-3-540-37293-6_6
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