By Jacqueline Lenoble, Lorraine Remer, Didier Tanre
This ebook offers a miles wanted clarification of the elemental actual rules of radiative move and distant sensing, and provides all of the tools and retrieval algorithms in a homogenous demeanour. The editors supply, for the 1st time, a simple direction from concept to useful algorithms in a single simply available quantity, making the relationship among theoretical radiative move and person useful strategies to retrieve aerosol details from distant sensing, and supplying the specifics and intercomparison of all present and old retrieval equipment.
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Extra resources for Aerosol Remote Sensing
The depolarization factor dLVGHÀQHGDVWKHUDWLRRIWKHSDUDOOHOWRWKHSHUSHQGLFXODUFRPSRQHQWVRIWKHHOHFWULFÀHOG vector at Ə 90°. It has been measured several times, but is still subject to uncertainty, leading to an uncertainty of about 2% in the so-called King factor (6+3d)/(6–7d) appearing in Eq. 33) below. 25 hPa and a temperature of 15°C), N is the molecular density, and Ns is the same quantity in standard conditions. The ms is also subject to some uncertainty and slightly depends on the wavelength.
The number size distribution then derives from Eq. 4), and it is not LND. 7) 2 µ r n(r )dr 0 WKHDVVRFLDWHGHIIHFWLYHYDULDQFHLVGHÀQHGE\ h µ (r r eff v eff " ) 2 r 2 n(r )dr . 8) n(r )dr 0 While the log-normal function, especially the bimodal version, is a common representation of the aerosol size distribution for mathematical purposes, in nature aerosol size distributions are not necessarily lognormal or even bimodal lognormal. Sometimes aerosol size distributions are complex superpositions of more than two modes, and modern retrieval methods that allow for irregularly shaped size distributions do retrieve distributions that ZRXOGQRWÀWDORJQRUPDO Other mathematical expressions are often used for the size distribution and two of them are given here.
Remer, Didier Tanré :KDWDUHDHURVROV" Aerosols are the solid and liquid particles suspended in the atmosphere. They can be seen DVWKHDPRUSKRXVKD]HWKDWGHFUHDVHVYLVLELOLW\RQSROOXWHGGD\VRUWKHZHOOGHÀQHGSOXPHV RISDUWLFOHVWKDWULVHRXWRIDEXUQLQJÀUH7KHVHSDUWLFOHVFDQEHHLWKHUQDWXUDOORIWHGGHVHUW DQGVRLOGXVWVHDVDOWSDUWLFOHVYROFDQLFHPLVVLRQVZLOGÀUHVPRNHELRJHQLFHPLVVLRQVRU anthropogenic (industrial emissions, biomass burning for agriculture, or land use changes that accelerate erosion and evaporation of lakes).