气候变化领域集成服务门户(CCPortal): Winter Daytime Warming and Shift in Summer Monsoon Increase Plant Cover and Net CO2 Uptake in a Central Tibetan Alpine Steppe Ecosystem

CCPortal

DOI	10.1029/2021JG006441
	Winter Daytime Warming and Shift in Summer Monsoon Increase Plant Cover and Net CO2 Uptake in a Central Tibetan Alpine Steppe Ecosystem
	Nieberding, Felix; Wille, Christian; Ma, Yaoming; Wang, Yuyang; Maurischat, Philipp; Lehnert, Lukas; Sachs, Torsten
通讯作者	Nieberding, F (通讯作者)
发表日期	2021
ISSN	2169-8953
EISSN	2169-8961
卷号	126 期号:10
英文摘要	Over the past decades, human-induced climate change has led to a widespread wetting and warming of the Tibetan Plateau (TP), affecting both ecosystems and the carbon cycling therein. Whether the previously observed climate changes stimulate carbon uptake via enhanced photosynthesis or carbon loss via enhanced soil respiration remains unclear. Here we present 14 years of observations of carbon fluxes, meteorological variables and remotely sensed plant cover estimations from a central Tibetan alpine steppe ecosystem at Nam Co, the third largest lake on the TP. Using modified Mann-Kendall trend tests, we found a significant increasing daily net carbon uptake of 0.5 g C m(-2) decade(-1), which can be explained by a widespread greening at the southern shore of lake Nam Co. The Plateau-wide changes in temperature and precipitation are locally expressed as an increasing diurnal temperature range during winter, higher water availability during spring, higher cloud cover during early summer and less water availability during late summer. While these changes differ over the course of the year, they tend to stimulate plant growth more than microbial respiration, leading to an increased carbon uptake during all seasons. This study indicates that during the 14 years study period, a higher amplitude in winter temperatures and an earlier summer monsoon promote carbon uptake in a central Tibetan alpine steppe ecosystem.
关键词	MANN-KENDALL TEST GREEN-UP DATE TEMPERATURE-RANGE DETECT TREND PLATEAU CARBON GRASSLAND LAKE RESPIRATION EXCHANGE
英文关键词	eddy covariance; plant cover; climate change; tibetan plateau; alpine steppe; carbon dioxide
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:000711969900025
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/260509
推荐引用方式 GB/T 7714	Nieberding, Felix,Wille, Christian,Ma, Yaoming,et al. Winter Daytime Warming and Shift in Summer Monsoon Increase Plant Cover and Net CO2 Uptake in a Central Tibetan Alpine Steppe Ecosystem[J]. 中国科学院青藏高原研究所,2021,126(10).
APA	Nieberding, Felix.,Wille, Christian.,Ma, Yaoming.,Wang, Yuyang.,Maurischat, Philipp.,...&Sachs, Torsten.(2021).Winter Daytime Warming and Shift in Summer Monsoon Increase Plant Cover and Net CO2 Uptake in a Central Tibetan Alpine Steppe Ecosystem.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,126(10).
MLA	Nieberding, Felix,et al."Winter Daytime Warming and Shift in Summer Monsoon Increase Plant Cover and Net CO2 Uptake in a Central Tibetan Alpine Steppe Ecosystem".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 126.10(2021).