气候变化领域集成服务门户(CCPortal): Large-scale remote sensing analysis reveals an increasing coupling of grassland vitality to atmospheric water demand

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DOI	10.1111/gcb.17315
	Large-scale remote sensing analysis reveals an increasing coupling of grassland vitality to atmospheric water demand
	Kowalski, Katja; Senf, Cornelius; Okujeni, Akpona; Hostert, Patrick
发表日期	2024
ISSN	1354-1013
EISSN	1365-2486
起始页码	30
结束页码	5
卷号	30 期号:5
英文摘要	Grasslands provide important ecosystem services to society, including biodiversity, water security, erosion control, and forage production. Grasslands are also vulnerable to droughts, rendering their future vitality under climate change uncertain. Yet, the grassland response to drought is not well understood, especially for heterogeneous Central European grasslands. We here fill this gap by quantifying the spatiotemporal sensitivity of grasslands to drought using a novel remote sensing dataset from Landsat/Sentinel-2 paired with climate re-analysis data. Specifically, we quantified annual grassland vitality at fine spatial scale and national extent (Germany) from 1985 to 2021. We analyzed grassland sensitivity to drought by testing for statistically robust links between grassland vitality and common drought indices. We furthermore explored the spatiotemporal variability of drought sensitivity for 12 grassland habitat types given their different biotic and abiotic features. Grassland vitality maps revealed a large-scale reduction of grassland vitality during past droughts. The unprecedented drought of 2018-2019 stood out as the largest multi-year vitality decline since the mid-1980s. Grassland vitality was consistently coupled to drought (R2 = .09-.22) with Vapor Pressure Deficit explaining vitality best. This suggests that high atmospheric water demand, as observed during recent compounding drought and heatwave events, has major impacts on grassland vitality in Central Europe. We found a significant increase in drought sensitivity over time with highest sensitivities detected in periods of extremely high atmospheric water demand, suggesting that drought impacts on grasslands are becoming more severe with ongoing climate change. The spatial variability of grassland drought sensitivity was linked to different habitat types, with declining sensitivity from dry and mesic to wet habitats. Our study provides the first large-scale, long-term, and spatially explicit evidence of increasing drought sensitivities of Central European grasslands. With rising compound droughts and heatwaves under climate change, large-scale grassland vitality loss, as in 2018-2019, will thus become more likely in the future. Grasslands are vulnerable to droughts, rendering their future vitality under climate change uncertain. We quantified the drought sensitivity of Central European grasslands pairing a fine-scale remote sensing dataset with climate re-analysis data. Grassland vitality was most sensitive to atmospheric water demand highlighting the importance of recent compounding drought and heatwaves. The spatial variability of drought sensitivity was linked to different grassland habitat types. Our study provides the first large-scale, long-term, and spatially explicit evidence of increasing drought sensitivities of Central European grasslands.image
英文关键词	drought; EUNIS; habitat; Landsat; Sentinel-2; time series; Vapor Pressure Deficit
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:001216174400001
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/309433
作者单位	Humboldt University of Berlin; Technical University of Munich; Humboldt University of Berlin
推荐引用方式 GB/T 7714	Kowalski, Katja,Senf, Cornelius,Okujeni, Akpona,et al. Large-scale remote sensing analysis reveals an increasing coupling of grassland vitality to atmospheric water demand[J],2024,30(5).
APA	Kowalski, Katja,Senf, Cornelius,Okujeni, Akpona,&Hostert, Patrick.(2024).Large-scale remote sensing analysis reveals an increasing coupling of grassland vitality to atmospheric water demand.GLOBAL CHANGE BIOLOGY,30(5).
MLA	Kowalski, Katja,et al."Large-scale remote sensing analysis reveals an increasing coupling of grassland vitality to atmospheric water demand".GLOBAL CHANGE BIOLOGY 30.5(2024).