globalchange  > 全球变化的国际研究计划
DOI: 10.1088/1748-9326/ab22c3
WOS记录号: WOS:000475442000003
论文题名:
Impacts of the 2017 flash drought in the US Northern plains informed by satellite-based evapotranspiration and solar-induced fluorescence
作者: Hu, Mingzhu1; Kimball, John S.1,2; Yi, Yonghong3; Running, Steve1; Guan, Kaiyu4; Jensco, Kelsey5; Maxwell, Bruce6; Maneta, Marco7
通讯作者: Hu, Mingzhu
刊名: ENVIRONMENTAL RESEARCH LETTERS
ISSN: 1748-9326
出版年: 2019
卷: 14, 期:7
语种: 英语
英文关键词: drought ; cropland ; evapotranspiration ; solar-induced fluorescence ; crop production
WOS关键词: INDUCED CHLOROPHYLL FLUORESCENCE ; SOIL-MOISTURE ; INSIGHTS ; PHOTOSYNTHESIS ; PRECIPITATION ; AGRICULTURE ; MODEL ; MODIS ; WATER ; CYCLE
WOS学科分类: Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向: Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
英文摘要:

Drought is increasing in frequency and severity, exacerbating food and water security risks in an era of continued global warming and human population growth. Here, we analyzed a severe summer drought affecting the US Northern Plains region in 2017. We examined the spatial pattern and seasonal progression of vegetation productivity and water use in the region using satellite-based estimates of field-scale (30 m) cropland evapotranspiration (ET), county level annual crop production statistics, and GOME-2 satellite observations of solar-induced chlorophyll fluorescence (SIF). The cropland ET record shows strong potential to track seasonal cropland water demands spatially, with strong correspondence to regional climate variables in the Northern Plains. The GOME-2 SIF record shows significant but limited correlations with finer scale climate variability due to the coarse sensor footprint, but captured an anomalous regional productivity decline coincident with drought related decreases in crop production and ET. The drought contributed to an overall 25% reduction in cropland ET, 6% decrease in crop production, and 11% reduction in SIF productivity over the region from April to September in 2017 relative to the longer (2008-2017) satellite record. More severely impacted agricultural areas indicated by the US Drought Monitor exceptional drought (D4) category represented 11% of the region and showed much larger anomalous ET (20%-81%) and productivity (11%-73%) declines. The regional pattern of drought impacts indicated more severe productivity and ET reductions in the north central and southern counties with extensive agriculture, and less impact in the western counties of the Northern Plains. This study provides a multiscale assessment of drought related impacts on regional productivity and ET over a crop intensive region, emphasizing the use of global satellite observations capable of informing regional to global scale water and food security assessments.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/142956
Appears in Collections:全球变化的国际研究计划

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作者单位: 1.Univ Montana, WA Franke Coll Forestry & Conservat, Numer Terradynam Simulat Grp, Missoula, MT 59812 USA
2.Univ Montana, WA Franke Coll Forestry & Conservat, Dept Ecosyst & Conservat Sci, Missoula, MT 59812 USA
3.CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA
4.Univ Illinois, Dept Nat Resources & Environm Sci, Urbana, IL 61820 USA
5.Univ Montana, Coll Forestry & Conservat, Dept Forest Management, Missoula, MT 59812 USA
6.Montana State Univ, Dept Land Resources & Environm Sci, Bozeman, MT 59717 USA
7.Univ Montana, Dept Geosci, Missoula, MT 59812 USA

Recommended Citation:
Hu, Mingzhu,Kimball, John S.,Yi, Yonghong,et al. Impacts of the 2017 flash drought in the US Northern plains informed by satellite-based evapotranspiration and solar-induced fluorescence[J]. ENVIRONMENTAL RESEARCH LETTERS,2019-01-01,14(7)
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