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Retrieval of ocean parameters from o...

Fan, Yongzhen.

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Retrieval of ocean parameters from optical satellite remote sensing measurements and their vertical distribution from in situ radiometric measurements.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Retrieval of ocean parameters from optical satellite remote sensing measurements and their vertical distribution from in situ radiometric measurements./
作者:	Fan, Yongzhen.
面頁冊數:	135 p.
附註:	Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
Contained By:	Dissertation Abstracts International78-05B(E).
標題:	Remote sensing. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10189080
ISBN:	9781369369793

Retrieval of ocean parameters from optical satellite remote sensing measurements and their vertical distribution from in situ radiometric measurements.
Fan, Yongzhen.

Retrieval of ocean parameters from optical satellite remote sensing measurements and their vertical distribution from in situ radiometric measurements. - 135 p.

Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.

Thesis (Ph.D.)--Stevens Institute of Technology, 2016.

Measurements of "ocean color" from space can be used to infer absorption and scattering coefficients, which in turn can be inverted to provide information about marine parameters including amounts of pigmented particles, colored dissolved organic matter, and inorganic particles suspended in the water column. Current methods to retrieve marine parameters from satellite remote sensing measurements require accurate "atmospheric correction", which ideally should remove the radiance due to atmospheric molecular and aerosol multiple scattering and absorption from the total radiances measured by the remote sensor, so that the remaining radiances are solely from the ocean. Such methods are not completely sound physically, since radiances can be reliably subtracted only when the single scattering approximation applies. As a result, due to overestimation of the atmospheric contribution to the measured signal standard atmospheric correction methods produce negative water-leaving radiances in the visible part of the spectrum, which happens more frequently in coastal areas with turbid water than in open ocean areas with relatively pristine water. This research introduced a new method to simultaneously retrieve aerosol and marine parameters based on an accurate radiative transfer model of a coupled atmosphere-ocean system and a non-linear (Levenberg-Marquardt) optimal estimation technique. The vertical distribution of the marine parameters cannot be retrieved from the satellite remote sensing measurements because they only provide information about the upper ocean, and do not include information about the vertical distribution. This research used in-situ radiometric measurements, i.e. upwelling radiance (Lu) and downwelling irradiance (Ed), inside the water column to retrieve the vertical distribution of marine parameters. A two step strategy was adopted. First, the vertical distribution of the inherent optical properties (absorption and scattering coefficients) of the water column is inferred from the radiometric measurements. Second, the vertical distribution of algal and mineral particles was retrieved from the inherent optical properties. This research also introduced a neural network method to correct for the bidirectional effect of the water-leaving radiance used in ocean color remote sensing retrievals.

ISBN: 9781369369793Subjects--Topical Terms:

535394
Remote sensing.

Retrieval of ocean parameters from optical satellite remote sensing measurements and their vertical distribution from in situ radiometric measurements.
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245 1 0 $a Retrieval of ocean parameters from optical satellite remote sensing measurements and their vertical distribution from in situ radiometric measurements.
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500 $a Source: Dissertation Abstracts International, Volume: 78-05(E), Section: B.
500 $a Adviser: Knut Stamnes.
502 $a Thesis (Ph.D.)--Stevens Institute of Technology, 2016.
520 $a Measurements of "ocean color" from space can be used to infer absorption and scattering coefficients, which in turn can be inverted to provide information about marine parameters including amounts of pigmented particles, colored dissolved organic matter, and inorganic particles suspended in the water column. Current methods to retrieve marine parameters from satellite remote sensing measurements require accurate "atmospheric correction", which ideally should remove the radiance due to atmospheric molecular and aerosol multiple scattering and absorption from the total radiances measured by the remote sensor, so that the remaining radiances are solely from the ocean. Such methods are not completely sound physically, since radiances can be reliably subtracted only when the single scattering approximation applies. As a result, due to overestimation of the atmospheric contribution to the measured signal standard atmospheric correction methods produce negative water-leaving radiances in the visible part of the spectrum, which happens more frequently in coastal areas with turbid water than in open ocean areas with relatively pristine water. This research introduced a new method to simultaneously retrieve aerosol and marine parameters based on an accurate radiative transfer model of a coupled atmosphere-ocean system and a non-linear (Levenberg-Marquardt) optimal estimation technique. The vertical distribution of the marine parameters cannot be retrieved from the satellite remote sensing measurements because they only provide information about the upper ocean, and do not include information about the vertical distribution. This research used in-situ radiometric measurements, i.e. upwelling radiance (Lu) and downwelling irradiance (Ed), inside the water column to retrieve the vertical distribution of marine parameters. A two step strategy was adopted. First, the vertical distribution of the inherent optical properties (absorption and scattering coefficients) of the water column is inferred from the radiometric measurements. Second, the vertical distribution of algal and mineral particles was retrieved from the inherent optical properties. This research also introduced a neural network method to correct for the bidirectional effect of the water-leaving radiance used in ocean color remote sensing retrievals.
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