气候变化领域集成服务门户(CCPortal): Global Patterns and Climate Controls of Terrestrial Ecosystem Light Use Efficiency

CCPortal

DOI	10.1029/2020JG005908
	Global Patterns and Climate Controls of Terrestrial Ecosystem Light Use Efficiency
	Tang, Shuchang; Wang, Xuhui; He, Mingzhu; Huang, Ling; Zhang, Yuan; Yang, Hui; Piao, Shilong
通讯作者	Wang, XH (通讯作者)
发表日期	2020
ISSN	2169-8953
EISSN	2169-8961
卷号	125 期号:12
英文摘要	Light use efficiency (LUE) is a critical parameter, on which we rely to quantify the vegetation's capability to harvest solar energy and thus the photosynthesis carbon uptake. However, our understanding on its magnitude, global pattern, and climatic drivers remains uncertain. In this study, we investigated global mean annual LUE during 1980-2013 based on state-of-the-art estimates from scaled-up eddy covariance measurements (data-driven models) and 10 process-based models used in Global Carbon Project. We found comparable global LUE estimates from data-driven models (0.90 +/- 0.25 g C MJ(-1)) and process-based models (0.73 +/- 0.22 g C MJ(-1)), with individual model estimates ranging from 0.49 to 0.98 g C MJ(-1). While both types of models agreed on highest LUE over the tropical evergreen forests, discrepancies remained over middle and high latitudes of the Northern Hemisphere, which probably resulted from different response of LUE to climatic factors. Spatial analyses revealed that LUE variations were more driven by temperature and precipitation than by solar radiation. While the response of LUE to precipitation was almost always positive globally, the response of LUE to temperature was only positive in part of the nontropical regions. Process-based models showed that precipitation strongly regulated the response of LUE to temperature, which shifted from negative to positive when mean annual precipitation was larger than 1,000 mm yr(-1). Our results provide converging global LUE estimates and highlight the need to take fully account of interactive effects of climatic factors in regulating LUE and thus the response of photosynthesis to climate change.
关键词	GROSS PRIMARY PRODUCTION WATER-USE EFFICIENCY RADIATION USE EFFICIENCY PRIMARY PRODUCTIVITY CARBON-CYCLE DIFFUSE-RADIATION MODEL DESCRIPTION NITROGEN FOREST FLUX
英文关键词	light use efficiency; data‐ driven model; process‐ based model; temperature; precipitation; interaction of climatic factors
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000603282000023
来源期刊	JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259709
推荐引用方式 GB/T 7714	Tang, Shuchang,Wang, Xuhui,He, Mingzhu,et al. Global Patterns and Climate Controls of Terrestrial Ecosystem Light Use Efficiency[J]. 中国科学院青藏高原研究所,2020,125(12).
APA	Tang, Shuchang.,Wang, Xuhui.,He, Mingzhu.,Huang, Ling.,Zhang, Yuan.,...&Piao, Shilong.(2020).Global Patterns and Climate Controls of Terrestrial Ecosystem Light Use Efficiency.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,125(12).
MLA	Tang, Shuchang,et al."Global Patterns and Climate Controls of Terrestrial Ecosystem Light Use Efficiency".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 125.12(2020).