Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 540928
Title Increased water-use efficiency and reduced CO2 uptake by plants during droughts at a continental scale
Author(s) Peters, W.; Velde, I.R. van der; Schaik, Erik van; Miller, John B.; Ciais, Philippe; Duarte, Henrique F.; Laan-Luijkx, I.T. van der; Molen, M.K. van der; Scholze, M.; Schaefer, Kevin; Vidale, Pier Luigi; Verhoef, Anne; Wårlind, D.; Zhu, Dan; Tans, Pieter P.; Vaughn, Bruce; White, James W.C.
Source Nature geoscience 11 (2018). - ISSN 1752-0894 - p. 744 - 748.
DOI https://doi.org/10.1038/s41561-018-0212-7
Department(s) Meteorology and Air Quality
WIMEK
Publication type Refereed Article in a scientific journal
Publication year 2018
Abstract Severe droughts in the Northern Hemisphere cause a widespread decline of agricultural yield, the reduction of forest carbon uptake, and increased CO2 growth rates in the atmosphere. Plants respond to droughts by partially closing their stomata to limit their evaporative water loss, at the expense of carbon uptake by photosynthesis. This trade-off maximizes their water-use efficiency (WUE), as measured for many individual plants under laboratory conditions and field experiments. Here we analyse the 13C/12C stable isotope ratio in atmospheric CO2 to provide new observational evidence of the impact of droughts on the WUE across areas of millions of square kilometres and spanning one decade of recent climate variability. We find strong and spatially coherent increases in WUE along with widespread reductions of net carbon uptake over the Northern Hemisphere during severe droughts that affected Europe, Russia and the United States in 2001–2011. The impact of those droughts on WUE and carbon uptake by vegetation is substantially larger than simulated by the land-surface schemes of six state-of-the-art climate models. This suggests that drought-induced carbon–climate feedbacks may be too small in these models and improvements to their vegetation dynamics using stable isotope observations can help to improve their drought response.
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