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Hyperspectral solar-induced chloroph...

Van Wittenberghe, Shari.

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Hyperspectral solar-induced chlorophyll fluorescence of urban tree leaves: Analyses and applications.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Hyperspectral solar-induced chlorophyll fluorescence of urban tree leaves: Analyses and applications./
作者:	Van Wittenberghe, Shari.
面頁冊數:	200 p.
附註:	Source: Dissertation Abstracts International, Volume: 76-04(E), Section: B.
Contained By:	Dissertation Abstracts International76-04B(E).
標題:	Physiology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3581946
ISBN:	9781321425222

Hyperspectral solar-induced chlorophyll fluorescence of urban tree leaves: Analyses and applications.
Van Wittenberghe, Shari.

Hyperspectral solar-induced chlorophyll fluorescence of urban tree leaves: Analyses and applications. - 200 p.

Source: Dissertation Abstracts International, Volume: 76-04(E), Section: B.

Thesis (Ph.D.)--Universiteit Antwerpen (Belgium), 2014.

This item must not be sold to any third party vendors.

Solar energy is the primary energy source for life on Earth which is converted into chemical energy through photosynthesis by plants, algae and cyanobacteria, releasing fuel for the organisms' activities. To dissipate excess of absorbed light energy, plants emit chlorophyll (Chl) fluorescence (650-850 nm) from the same location where photosynthesis takes place. Hence, it provides information on the efficiency of primary energy conversion. From this knowledge, many applications on vegetation and crop stress monitoring could be developed, a necessity for our planet under threat of a changing global climate.

ISBN: 9781321425222Subjects--Topical Terms:

518431
Physiology.

Hyperspectral solar-induced chlorophyll fluorescence of urban tree leaves: Analyses and applications.
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100 1 $a Van Wittenberghe, Shari. $3 3177101
245 1 0 $a Hyperspectral solar-induced chlorophyll fluorescence of urban tree leaves: Analyses and applications.
300 $a 200 p.
500 $a Source: Dissertation Abstracts International, Volume: 76-04(E), Section: B.
500 $a Advisers: Roeland Samson; Roland Valcke.
502 $a Thesis (Ph.D.)--Universiteit Antwerpen (Belgium), 2014.
506 $a This item must not be sold to any third party vendors.
506 $a This item must not be added to any third party search indexes.
520 $a Solar energy is the primary energy source for life on Earth which is converted into chemical energy through photosynthesis by plants, algae and cyanobacteria, releasing fuel for the organisms' activities. To dissipate excess of absorbed light energy, plants emit chlorophyll (Chl) fluorescence (650-850 nm) from the same location where photosynthesis takes place. Hence, it provides information on the efficiency of primary energy conversion. From this knowledge, many applications on vegetation and crop stress monitoring could be developed, a necessity for our planet under threat of a changing global climate.
520 $a Even though the Chl fluorescence signal is weak against the intense reflected radiation background, methods for retrieving the solar-induced Chl fluorescence have been refined over the last years, both at leaf and airborne scale. However, a lack of studies on solar-induced Chl fluorescence gives difficulties for the interpretation of the signal. Within this thesis, hyperspectral upward and downward solar-induced Chl fluorescence is measured at leaf level. Fluorescence yield (FY) is calculated as well as different ratios characterizing the emitted Chl fluorescence shape.
520 $a The research in this PhD dissertation illustrates the influence of several factors on the solar-induced Chl fluorescence signal. For instance, both the intensity of FY and its spectral shape of urban tree leaves are able to change under influence of stress factors such as traffic air pollution. This shows how solar-induced Chl fluorescence could function as an early stress indicator for vegetation. Further, it is shown that the signal contains information on the ultrastructure of the photosynthetic apparatus. Also, it is proven that the leaf anatomical structure and related light scattering properties play a role in the partitioning between upward and downward Chl fluorescence emission. All these findings indicate how the Chl fluorescence spectrum is influenced by factors which also influence photosynthesis.
520 $a From this we conclude that solar-induced Chl fluorescence emitted by vegetation is a meaningful signal affected by several environmental and plant specific factors. It is important to define these factors in order to obtain a better interpretation of the signal, especially regarding the current and future remote sensing mapping possibilities of the signal.
590 $a School code: 1513.
650 4 $a Physiology. $3 518431
650 4 $a Environmental science. $3 677245
650 4 $a Remote sensing. $3 535394
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690 $a 0768
690 $a 0799
710 2 $a Universiteit Antwerpen (Belgium). $3 1023974
773 0 $t Dissertation Abstracts International $g 76-04B(E).
790 $a 1513
791 $a Ph.D.
792 $a 2014
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3581946