Download Aerosol Remote Sensing by Jacqueline Lenoble, Lorraine Remer, Didier Tanre PDF

By Jacqueline Lenoble, Lorraine Remer, Didier Tanre

This ebook supplies a far wanted rationalization 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 offer, for the 1st time, a simple course from conception to functional algorithms in a single simply obtainable quantity, making the relationship among theoretical radiative move and person functional options to retrieve aerosol details from distant sensing, and supplying the specifics and intercomparison of all present and historic retrieval equipment.

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Extra resources for Aerosol Remote Sensing

Sample text

Shortwave aerosol remote sensing is usually performed outside the absorption bands, but some instruments also have channels capturing absorption bands with the objective of quantifying gaseous components. Absorption in the longwave terrestrial spectrum, both by molecules and aerosols, is accompanied by emission, according to Kirchhoff’s law. This subject will be addressed in Chapter 9. ,Q6HFWLRQVDQGZHSUHVHQWVRPHEDVLFGHÀQLWLRQVFRQFHUQLQJWKHVFDWWHULQJDQG polarization phenomena; the same formalism will be used throughout this book.

Aerosols are a non-gaseous part of the atmosphere that play a critical role in cloud formation and precipitation processes. They exist in a variety of forms: solid matter (soluble or insoluble), liquid matter (chemicals dissolved in water), or a mixture of the two. They DUHVXEMHFWWRFRQWLQXRXVWUDQVIRUPDWLRQïWKHUHVXOWRIFKHPLFDOSKRWRFKHPLFDODQGK\GURORJLFDO UHDFWLRQV ï DQG WKH\ DIIHFW WKH ZHDWKHU DQG FOLPDWH V\VWHP GLUHFWO\ WKURXJK WKHLUHIIHFWRQWKHUDGLDWLRQÀHOGDQGLQGLUHFWO\WKURXJKWKHLULQWHUDFWLRQZLWKFORXGVDQG precipitation.

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.

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