Diurnal and Seasonal Solar Induced Chlorophyll Fluorescence and Photosynthesis in a Boreal Scots Pine Canopy

被引：38

作者：

Nichol, Caroline J. ^{[1
]}

Drolet, Guillaume ^{[1
,2
]}

Porcar-Castell, Albert ^{[3
]}

Wade, Tom ^{[1
]}

Sabater, Neus ^{[4
,5
]}

Middleton, Elizabeth M. ^{[6
]}

MacLellan, Chris ^{[7
]}

Levula, Janne ^{[8
]}

Mammarella, Ivan ^{[9
]}

Vesala, Timo ^{[9
]}

Atherton, Jon ^{[3
]}

机构：

[1] Univ Edinburgh, Sch GeoSci, Alexander Crum Brown Rd, Edinburgh EH9 3FF, Midlothian, Scotland

[2] Minist Forets Faune & Parcs, Direct Rech Forestiere, Quebec City, PQ G1P 3W8, Canada

[3] Univ Helsinki, Inst Atmospher & Earth Syst Res Forest Sci, Opt Photosynth Lab, POB 27, FIN-00014 Helsinki, Finland

[4] Univ Valencia, Image Proc Lab, Parc Cient, Valencia 46980, Spain

[5] Finnish Meteorol Inst, Erik Palmenin Aukio 1,POB 501, FI-00101 Helsinki, Finland

[6] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20740 USA

[7] Grant Inst, Sch GeoSci, NERC Field Spect Facil, West Mains Rd, Edinburgh EH9 3JW, Midlothian, Scotland

[8] Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res Phys, Hyytialantie 124, FI-35500 Korkeakoski, Finland

[9] Univ Helsinki, Fac Sci, Inst Atmospher & Earth Syst Res Phys, POB 48, FI-00014 Helsinki, Finland

来源：

REMOTE SENSING | 2019年 / 11卷 / 03期

基金：

芬兰科学院;

关键词：

solar-induced chlorophyll fluorescence (SiF); seasonal dynamics; photosynthetic efficiency; proximal remote sensing; coniferous forest; gross primary productivity (GPP); light-use efficiency (LUE); Fraunhofer Line Discriminator (FLD); flux tower; GROSS PRIMARY PRODUCTION; PHOTOCHEMICAL REFLECTANCE INDEX; SUN-INDUCED FLUORESCENCE; LIGHT-USE EFFICIENCY; PHOTOSYSTEM-II; WATER-STRESS; TEMPERATURE; FIELD; RETRIEVAL; SPECTROMETER;

D O I：

10.3390/rs11030273

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Solar induced chlorophyll fluorescence has been shown to be increasingly an useful proxy for the estimation of gross primary productivity (GPP), at a range of spatial scales. Here, we explore the seasonality in a continuous time series of canopy solar induced fluorescence (hereafter SiF) and its relation to canopy gross primary production (GPP), canopy light use efficiency (LUE), and direct estimates of leaf level photochemical efficiency in an evergreen canopy. SiF was calculated using infilling in two bands from the incoming and reflected radiance using a pair of Ocean Optics USB2000+ spectrometers operated in a dual field of view mode, sampling at a 30 min time step using custom written automated software, from early spring through until autumn in 2011. The optical system was mounted on a tower of 18 m height adjacent to an eddy covariance system, to observe a boreal forest ecosystem dominated by Scots pine. (Pinus sylvestris) A Walz MONITORING-PAM, multi fluorimeter system, was simultaneously mounted within the canopy adjacent to the footprint sampled by the optical system. Following correction of the SiF data for O-2 and structural effects, SiF, SiF yield, LUE, the photochemicsl reflectance index (PRI), and the normalized difference vegetation index (NDVI) exhibited a seasonal pattern that followed GPP sampled by the eddy covariance system. Due to the complexities of solar azimuth and zenith angle (SZA) over the season on the SiF signal, correlations between SiF, SiF yield, GPP, and LUE were assessed on SZA <50 degrees and under strictly clear sky conditions. Correlations found, even under these screened scenarios, resulted around similar to r(2) = 0.3. The diurnal responses of SiF, SiF yield, PAM estimates of effective quantum yield (Delta F/Delta F-m(')), and meteorological parameters demonstrated some agreement over the diurnal cycle. The challenges inherent in SiF retrievals in boreal evergreen ecosystems are discussed.

引用

页数：22

共 91 条

[41] Global patterns of land-atmosphere fluxes of carbon dioxide, latent heat, and sensible heat derived from eddy covariance, satellite, and meteorological observations [J].