气候变化领域集成服务门户(CCPortal): Spatiotemporal variability of evapotranspiration in Alpine grasslands and its biotic and abiotic drivers

CCPortal

DOI	10.1002/eco.2633
	Spatiotemporal variability of evapotranspiration in Alpine grasslands and its biotic and abiotic drivers
	Ambrosi, Lisa; Berger, Vanessa; Rainer, Georg; Obojes, Nikolaus; Tappeiner, Ulrike; Tasser, Erich; Leitinger, Georg
发表日期	2024
ISSN	1936-0584
EISSN	1936-0592
起始页码	17
结束页码	3
卷号	17 期号:3
英文摘要	To gain a deeper understanding of the water balances of Alpine grassland ecosystems, it is crucial to know the abiotic and biotic drivers of evapotranspiration. The abiotic drivers are very heterogeneous in mountain regions because elevation, slope and aspect control incoming Rs, and atmospheric layering affect air temperature, humidity and wind distribution. In a study with 24 lysimeter plots distributed over a study area of approx. 300 km2 in the Eastern Alps, we covered a wide range of topographic conditions. We investigated the effects of abiotic drivers on evapotranspiration by measuring evaporation from a free-water body (Ew). For the biological modulation of crop evapotranspiration (ETc), we analysed two different grassland types (at peak biomass and at low biomass) and calculated the respective crop coefficients (Kc). Results showed that primarily physical drivers such as the accumulated solar radiation from sunrise to measurement (Rs_acc), followed by atmospheric pressure (P), wind speed (u) and vapour pressure deficit (VPD) influence both Ew and ETc. Moreover, ETc is also significantly influenced by standing biomass and the grassland type (i.e., resource use strategies of the vegetation types) and by the geographic location along the valley (i.e., entrance, middle and head of the valley). We suppose plant stress and/or ground winds to be the underlying factor for the significance of the geographic location, yet further research is needed. The current study helps towards a better understanding of the water balance in alpine grassland ecosystems, but we also show that some spatial drivers cannot yet be adequately addressed.
英文关键词	abiotic drivers; alpine grassland; crop coefficient; evapotranspiration; lysimeter
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
WOS类目	Ecology ; Environmental Sciences ; Water Resources
WOS记录号	WOS:001162954400001
来源期刊	ECOHYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/300020
作者单位	University of Innsbruck; Carinthia University of Applied Sciences; European Academy of Bozen-Bolzano
推荐引用方式 GB/T 7714	Ambrosi, Lisa,Berger, Vanessa,Rainer, Georg,et al. Spatiotemporal variability of evapotranspiration in Alpine grasslands and its biotic and abiotic drivers[J],2024,17(3).
APA	Ambrosi, Lisa.,Berger, Vanessa.,Rainer, Georg.,Obojes, Nikolaus.,Tappeiner, Ulrike.,...&Leitinger, Georg.(2024).Spatiotemporal variability of evapotranspiration in Alpine grasslands and its biotic and abiotic drivers.ECOHYDROLOGY,17(3).
MLA	Ambrosi, Lisa,et al."Spatiotemporal variability of evapotranspiration in Alpine grasslands and its biotic and abiotic drivers".ECOHYDROLOGY 17.3(2024).