干旱区生态环境知识资源中心(Arid): Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert

Arid

DOI	10.1007/s11356-021-18229-0
	Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert
	Yang, Ping; Zhao, Liqiang; Liang, Xueran; Niu, Zhenmin; Zhao, Hang; Wang, Yuanyuan; Wang, Nai'ang
通讯作者	Wang, NA (corresponding author)，Lanzhou Univ, Coll Earth & Environm Sci, Ctr Glacier & Desert Res, Lanzhou 730000, Gansu, Peoples R China.
来源期刊	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
ISSN	0944-1344
EISSN	1614-7499
出版年	2022-01
英文摘要	It is of great significance to study the effects of precipitation events on carbon exchange in the ecosystem for an accurate understanding of the carbon cycle. However, the response of net ecosystem CO2 exchange (NEE) in the desert to precipitation events is elusive. In this study, the NEE in response to precipitation events of varying intensities in the Badain Jaran Desert (BJD) in China was continuously monitored using the eddy covariance (EC) technique. The following results were obtained: (1) The BJD ecosystem was a net CO2 sink throughout the study period, with NEE values of -113.4, -130.7, and -175.4 g C m(-2)a(-1) in 2016, 2018, and 2019, respectively. The total precipitation yielded a higher carbon sequestration capacity in 2019 than in the other two years. In addition, the intensity, time, and frequency of precipitation had significant impacts on CO2; (2) the threshold value of the NEE response to precipitation was similar to 1.4 mm, indicating the extreme sensitivity of the BJD to precipitation events; (3) the variations in the NEE response to precipitation events conformed to a dual exponential model. The analytical results of the model indicate that precipitation intensity was positively correlated with the carbon sequestration capacity of the desert. The model revealed that the greater the precipitation intensity, the longer it takes the NEE to reach the maximum, and the lengthier the duration of the residual effects. With an increase in the total precipitation and frequency of extreme precipitation events under warm and humidification climates, the carbon sequestration capacity of the BJD will likely be enhanced. The results of this study are of great significance for revealing the carbon cycle mechanism of the desert ecosystem.
英文关键词	Badain Jaran Desert Net ecosystem CO2 exchange Precipitation events Eddy covariance technique Net CO2 sink Desert ecosystem
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000745504800016
WOS关键词	RAIN PULSES ; CARBON SEQUESTRATION ; BAJA-CALIFORNIA ; ALKALINE SOILS ; CLIMATE-CHANGE ; WATER-VAPOR ; FLUX ; RESPIRATION ; ABSORPTION ; TREND
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377096
作者单位	[Yang, Ping; Zhao, Liqiang; Liang, Xueran; Niu, Zhenmin; Zhao, Hang; Wang, Yuanyuan; Wang, Nai'ang] Lanzhou Univ, Coll Earth & Environm Sci, Ctr Glacier & Desert Res, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ping,Zhao, Liqiang,Liang, Xueran,et al. Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert[J],2022.
APA	Yang, Ping.,Zhao, Liqiang.,Liang, Xueran.,Niu, Zhenmin.,Zhao, Hang.,...&Wang, Nai'ang.(2022).Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH.
MLA	Yang, Ping,et al."Response of net ecosystem CO2 exchange to precipitation events in the Badain Jaran Desert".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2022).