Journal Article

FZJ-2022-04659

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png An Interannual Drought Feedback Loop Affects the Surface Energy Balance and Cloud Properties

Hartick, C. (Corresponding author)FZJ* ; Furusho-Percot, C.FZJ* ; Clark, M. P. ; Kollet, S.FZJ*

2022
Wiley Hoboken, NJ

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Please use a persistent id in citations: http://hdl.handle.net/2128/32612  doi:10.1029/2022GL100924

Abstract: Long-term groundwater droughts are known to persist over timescales from multiple years up to decades. The mechanisms leading to drought persistence are, however, only partly understood. Applying a unique terrestrial system modeling platform in a probabilistic simulation framework over Europe, we discovered an important positive feedback mechanism from groundwater into the atmosphere that may increase drought persistence at interannual time scales over large continental regions. In the feedback loop, groundwater drought systematically increases net solar radiation via a cloud feedback, which, in turn, increases the drying of the land. In commonly applied climate and Earth system models, this feedback cannot be simulated due to a lack of groundwater memory effects in the representation of terrestrial hydrology. Thus, drought persistence and compound events may be underestimated in current climate projections.

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Contributing Institute(s):

1. Agrosphäre (IBG-3)

Research Program(s):

1. 2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217) (POF4-217)

Appears in the scientific report 2022

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; DEAL Wiley ; Ebsco Academic Search ; Essential Science Indicators ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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