干旱区生态环境知识资源中心(Arid): Effects of changes in precipitation on energy and water balance in a Eurasian meadow steppe

Arid

DOI	10.1186/s13717-019-0170-z
	Effects of changes in precipitation on energy and water balance in a Eurasian meadow steppe
	Chen, Jingyan; Shao, Changliang; Jiang, Shicheng; Qu, Luping; Zhao, Fangyuan; Dong, Gang
通讯作者	Dong, G (corresponding author), Chinese Acad Agr Sci, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China. ; Dong, G (corresponding author), Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China. ; Dong, G (corresponding author), Shanxi Univ, Sch Life Sci, Taiyuan 030006, Shanxi, Peoples R China.
来源期刊	ECOLOGICAL PROCESSES
EISSN	2192-1709
出版年	2019
卷号	8
英文摘要	IntroductionWater such as precipitation is the most critical environment driver of ecosystem processes and functions in semi-arid regions. Frequency and intensity of drought and transient waterlogging are expected to increase in the meadow steppe in northeastern China. Using a 4-year dataset of eddy covariance flux measurements, ground measurements of biomass, phenology, and meteorological conditions, we investigated the changes in energy fluxes at multiple temporal scales and under different precipitation regimes.ResultsThe meadow steppe was latent heat (LE) dominated when soil water content was >0.3m(3)m(-3), but switched to sensible heat (H) dominated status when soil water content fell below 0.3m(3)m(-3). LE dominated the energy exchange of the meadow grasslands on a yearly basis. Intensive precipitation had a profound impact on water-energy balance that could reduce the damages of drought by elevating deep soil moisture. The influence of LE on waterlogging depended on timing, with increased LE at the beginning of growing season and decreased LE after waterlogging. Spring and summer droughts resulted in different energy partitioning between latent and sensible heat energies, with spring drought dramatically decreased the LE fraction due to the change in water. In contrast, summer drought had little impact on LE due to the sufficient water input from large precipitation events at the beginning of the growing season.ConclusionsThere existed great seasonal and interannual variabilities in energy balance and partitioning in the meadow steppe over the 4-year study period, which were strongly influenced by changes in precipitation. The water loss through latent heat was more sensitive to spring drought than to summer drought, while summer drought had negligible impact on LE. Waterlogging contributed to LE by enhancing its values during and after the waterlogged periods at the beginning of the growing season in a dry year, but lowering its value after the waterlogged periods in growing season.
英文关键词	Energy balance Energy partition Precipitation change Eddy covariance Drought
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000469035900001
WOS关键词	LAND-SURFACE ; INTERANNUAL VARIATION ; GRASSLAND ECOSYSTEMS ; HEAT-FLUX ; EVAPOTRANSPIRATION ; EXCHANGE ; VARIABILITY ; DYNAMICS ; DROUGHT ; CLOSURE
WOS类目	Ecology ; 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/2XILL650/369873
作者单位	[Chen, Jingyan] Shanxi Univ, Inst Loess Plateau, Taiyuan 030006, Shanxi, Peoples R China; [Shao, Changliang; Dong, Gang] Chinese Acad Agr Sci, Natl Hulunber Grassland Ecosyst Observat & Res St, Beijing 100081, Peoples R China; [Shao, Changliang; Dong, Gang] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China; [Jiang, Shicheng] Northeast Normal Univ, Minist Educ, Key Lab Vegetat Ecol, Changchun 130024, Jilin, Peoples R China; [Qu, Luping] Fujian Agr & Forestry Univ, Coll Forestry, Forest Ecol Stable Isotope Ctr, Forestry Postdoctoral Stn, Fuzhou 350002, Fujian, Peoples R China; [Zhao, Fangyuan] Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China; [Zhao, Fangyuan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Dong, Gang] Shanxi Univ, Sch Life Sci, Taiyuan 030006, Shanxi, Peoples R China
推荐引用方式 GB/T 7714	Chen, Jingyan,Shao, Changliang,Jiang, Shicheng,et al. Effects of changes in precipitation on energy and water balance in a Eurasian meadow steppe[J],2019,8.
APA	Chen, Jingyan,Shao, Changliang,Jiang, Shicheng,Qu, Luping,Zhao, Fangyuan,&Dong, Gang.(2019).Effects of changes in precipitation on energy and water balance in a Eurasian meadow steppe.ECOLOGICAL PROCESSES,8.
MLA	Chen, Jingyan,et al."Effects of changes in precipitation on energy and water balance in a Eurasian meadow steppe".ECOLOGICAL PROCESSES 8(2019).