کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10114234 | 1621390 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Remote sensing of sunlight-induced chlorophyll fluorescence and reflectance of Scots pine in the boreal forest during spring recovery
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کلمات کلیدی
Absorbed Photosynthetically Active RadiationAPARNPQFLDPRIChlPSIIPSILHCIIPassive remote sensingFv/Fm - Fv / FmPhotosynthetically active radiation - تابش فعال فتوسنتزیLight detection and ranging - تشخیص نور و محدودهPar - توسطBoreal forest - جنگل بئرالCO2 flux - جیوه CO2Non-photochemical quenching - خنک سازی غیر فتوشیمیاییChlorophyll - سبزینه یا کلروفیلnormalized difference vegetation index - شاخص تنوع گیاه شناسی نرمال شدهNDVI - شاخص نرمالشده تفاوت پوشش گیاهی photosystem I - عکس سیستم منPhotosystem II - فتوسیستم 2LiDAR - لیدار Diurnal cycle - چرخه روزانهScots pine - کاج اسکاتلندprimary quinone acceptor - گیرنده اولیه کینون
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
کامپیوتر در علوم زمین
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چکیده انگلیسی
A measurement campaign to assess the feasibility of remote sensing of sunlight-induced chlorophyll fluorescence (ChlF) from a coniferous canopy was conducted in a boreal forest study site (Finland). A Passive Multi-wavelength Fluorescence Detector (PMFD) sensor, developed in the LURE laboratory, was used to obtain simultaneous measurements of ChlF in the oxygen absorption bands, at 687 and 760 nm, and a reflectance index, the PRI (Physiological Reflectance Index), for a month during spring recovery. When these data were compared with active fluorescence measurements performed on needles they revealed the same trend. During sunny days fluorescence and reflectance signals were found to be strongly influenced by shadows associated with the canopy structure. Moreover, chlorophyll fluorescence variations induced by rapid light changes (due to transient cloud shadows) were found to respond more quickly and with larger amplitude under summer conditions compared to those obtained under cold acclimation conditions. In addition, ChlF at 760 nm was observed to increase with the chlorophyll content. During this campaign, the CO2 assimilation was measured at the forest canopy level and was found remarkably well correlated with the PRI index.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Remote Sensing of Environment - Volume 96, Issue 1, 15 May 2005, Pages 37-48
Journal: Remote Sensing of Environment - Volume 96, Issue 1, 15 May 2005, Pages 37-48
نویسندگان
Juliette Louis, Abderrahmane Ounis, Jean-Marc Ducruet, Sébastien Evain, Tuomas Laurila, Tea Thum, Mika Aurela, Gunnar Wingsle, Luis Alonso, Roberto Pedros, Ismaël Moya,