干旱区生态环境知识资源中心(Arid): Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites

Arid

DOI	10.1029/2021MS002730
	Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites
	Kucuk, Caglar; Koirala, Sujan; Carvalhais, Nuno; Miralles, Diego G.; Reichstein, Markus; Jung, Martin
通讯作者	Küçük, Ç
来源期刊	JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS
EISSN	1942-2466
出版年	2022
卷号	14 期号:3
英文摘要	Hydrological interactions between vegetation, soil, and topography are complex, and heterogeneous in semi-arid landscapes. This along with data scarcity poses challenges for large-scale modeling of vegetation-water interactions. Here, we exploit metrics derived from daily Meteosat data over Africa at ca. 5 km spatial resolution for ecohydrological analysis. Their spatial patterns are based on Fractional Vegetation Cover (FVC) time series and emphasize limiting conditions of the seasonal wet to dry transition: the minimum and maximum FVC of temporal record, the FVC decay rate and the FVC integral over the decay period. We investigate the relevance of these metrics for large scale ecohydrological studies by assessing their co-variation with soil moisture, and with topographic, soil, and vegetation factors. Consistent with our initial hypothesis, FVC minimum and maximum increase with soil moisture, while the FVC integral and decay rate peak at intermediate soil moisture. We find evidence for the relevance of topographic moisture variations in arid regions, which, counter-intuitively, is detectable in the maximum but not in the minimum FVC. We find no clear evidence for wide-spread occurrence of the inverse texture effect on FVC. The FVC integral over the decay period correlates with independent data sets of plant water storage capacity or rooting depth while correlations increase with aridity. In arid regions, the FVC decay rate decreases with canopy height and tree cover fraction as expected for ecosystems with a more conservative water-use strategy. Thus, our observation-based products have large potential for better understanding complex vegetation-water interactions from regional to continental scales.
英文关键词	Africa fractional vegetation cover geostationary ecohydrology water limitation
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000776466100008
WOS关键词	GROUNDWATER-DEPENDENT ECOSYSTEMS ; SOIL-MOISTURE ; HYDROLOGIC PROCESSES ; ROOTING DEPTH ; WOODY COVER ; ACTIVE-ROLE ; MODEL ; PRECIPITATION ; CLIMATE ; PLANTS
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/393259
推荐引用方式 GB/T 7714	Kucuk, Caglar,Koirala, Sujan,Carvalhais, Nuno,et al. Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites[J],2022,14(3).
APA	Kucuk, Caglar,Koirala, Sujan,Carvalhais, Nuno,Miralles, Diego G.,Reichstein, Markus,&Jung, Martin.(2022).Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites.JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS,14(3).
MLA	Kucuk, Caglar,et al."Characterizing the Response of Vegetation Cover to Water Limitation in Africa Using Geostationary Satellites".JOURNAL OF ADVANCES IN MODELING EARTH SYSTEMS 14.3(2022).