[en] Drought is typically associated with a lack of precipitation, whereas the contribution of evapotranspiration and runoff to drought evolution is not well understood. Here, we use unique long-term observations made in four headwater catchments in Central and Western Europe to reconstruct storage anomalies and study the drivers of storage anomaly evolution during drought. We provide observational evidence for the ‘drought-paradox’ in that region: a consistent and significant increase in evapotranspiration during drought episodes which acts to amplify the storage anomalies. In contrast, decreases in runoff act to limit storage anomalies. Our findings stress the need for the correct representation of evapotranspiration and runoff processes in drought indices.
Disciplines :
Earth sciences & physical geography
Author, co-author :
Teuling, Adriaan J.; Wageningen University > 1Hydrology and Quantitative Water Management Group
Van Loon, Anne F.; Wageningen University > Hydrology and Quantitative Water Management Group
Seneviratne, Sonia Isabelle; 2Institute for Atmospheric and Climate Science, ETH Zurich, Switzerland
Lehner, Irene; Institute for Atmospheric and Climate Science, ETH Zurich, Switzerland and University of Lund, Sweden
Aubinet, Marc ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Heinesch, Bernard ; Université de Liège - ULiège > Sciences et technologie de l'environnement > Physique des bio-systèmes
Bernhofer, Christian; TU Dresden, Germany
Grünwald, Thomas; TU Dresden, Germany
Prasse, Heiko; TU Dresden, Germany
Spank, Uwe; TU Dresden, Germany
Language :
English
Title :
Evapotranspiration amplifies European summer drought
Publication date :
22 April 2013
Journal title :
Geophysical Research Letters
ISSN :
0094-8276
eISSN :
1944-8007
Publisher :
American Geophysical Union, Washington, United States - District of Columbia
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