Satellite-based Estimates of Canopy Photosynthetic Parameters for an Alpine Meadow in Northern

Ben NIU; Yongtao HE; Xianzhou ZHANG; Peili SHI; Mingyuan DU

doi:10.5814/j.issn.1674-764X.2020.03.002

Journals >Journal of Resources and Ecology >Volume 11 >Issue 3 >Page 253 > Article

Journal of Resources and Ecology
Vol. 11, Issue 3, 253 (2020)

Satellite-based Estimates of Canopy Photosynthetic Parameters for an Alpine Meadow in Northern

Ben NIU¹, Yongtao HE^1、2, Xianzhou ZHANG^1、2、*, Peili SHI^1、2, and Mingyuan DU³

Author Affiliations

¹Lhasa Plateau Ecosystem Research Station, Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China

²College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China

³Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, Ibaraki 305-8604, Japan

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DOI: 10.5814/j.issn.1674-764X.2020.03.002 Cite this Article

Ben NIU, Yongtao HE, Xianzhou ZHANG, Peili SHI, Mingyuan DU. Satellite-based Estimates of Canopy Photosynthetic Parameters for an Alpine Meadow in Northern[J]. Journal of Resources and Ecology, 2020, 11(3): 253 Copy Citation Text

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The 8-day step radiation observations during the years 2009 to 2011. (a) Total radiation and net radiation. (b) Photosynthetically active radiation (PAR) and the absorbed PAR by canopy (APAR).

Fig. 1. The 8-day step radiation observations during the years 2009 to 2011. (a) Total radiation and net radiation. (b) Photosynthetically active radiation (PAR) and the absorbed PAR by canopy (APAR).

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Seasonal patterns of FPAR observations (FPARg) and satellite-based FPAR estimations from 2009 to 2011 (a); and comparison with the FPARg from: 2009 (b); 2010 (c); and 2011 (d). Slope values (Slope) in (b-d) are the linear relationships between FAPRg and satellite-based FPAR estimations, and the dashed lines are the reference lines of 1:1. All linear

Fig. 2. Seasonal patterns of FPAR observations (FPARg) and satellite-based FPAR estimations from 2009 to 2011 (a); and comparison with the FPARg from: 2009 (b); 2010 (c); and 2011 (d). Slope values (Slope) in (b-d) are the linear relationships between FAPRg and satellite-based FPAR estimations, and the dashed lines are the reference lines of 1:1. All linear

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$Satellite-based estimations of the fractions of absorbed PAR by vegetation canopy (FPAR) and the extinction coefficient (kt) in the alpine meadow study area (n = 63)$

Fig. 3. Satellite-based estimations of the fractions of absorbed PAR by vegetation canopy (FPAR) and the extinction coefficient (kt) in the alpine meadow study area (n = 63)

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Fig. 4. [in Chinese]

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Method	Daily average FPAR estimations (n=21)											Mean FPAR(n=63)
	Mean of SD			RMSE				RPE (%)				Mean FPAR(n=63)
	2009	2010	2011	2009	2010	2011	Mean	2009	2010	2011	Mean	Mean (SD)
FPAR_MOD	0.19 (0.08)	0.21 (0.11)	0.20 (0.09)	0.16	0.19	0.16	0.17	43.1	43.0	41.9	42.7	0.20 (0.09) a
FPAR_LAI	0.26 (0.16)	0.30 (0.21)	0.30 (0.20)	0.13	0.20	0.16	0.17	23.4	19.1	15.1	19.2	0.29 (0.19) b
FPAR_NDVI	0.34 (0.05)	0.36 (0.05)	0.36 (0.06)	0.07	0.06	0.03	0.05	-4.2	3.8	-1.3	-0.5	0.36 (0.05) c
FPAR_EVI	0.35 (0.05)	0.36 (0.06)	0.36 (0.05)	0.07	0.06	0.03	0.05	-4.1	4.5	1.2	-0.3	0.35 (0.05) c
FPARg	0.33 (0.08)	0.37 (0.10)	0.35 (0.09)	0	0	0	0	0	0	0	0	0.35 (0.08) c