The dry season intensity as a key driver of NPP trends

We analyze the impacts of changing dry season length and intensity on vegetation productivity and biomass. Our results show a wetness asymmetry in dry ecosystems, with dry seasons becoming drier and wet seasons becoming wetter, likely caused by climate change. The increasingly intense dry seasons were consistently correlated with a decreasing trend in net primary productivity (NPP) and biomass from different products and could potentially mean a reduction of 10–13% in NPP by 2100. We found that annual NPP in dry ecosystems is particularly sensitive to the intensity of the dry season, whereas an increase in precipitation during the wet season has a smaller effect. We conclude that changes in water availability over the dry season affect vegetation throughout the whole year, driving changes in regional NPP. Moreover, these results suggest that usage of seasonal water fluxes is necessary to improve our understanding of the link between water availability and the land carbon cycle.

NATURVETENSKAP Geovetenskap och miljövetenskap Klimatforskning hsv//swe
NATURAL SCIENCES Earth and Related Environmental Sciences Climate Research hsv//eng
dry season length land carbon cycle drought 0428 Carbon cycling 1630 Impacts of global change 1655 Water cycles 1615 Biogeochemical cycles, processes, and modeling 1616 Climate variability

Friedlingstein, PierreUniversity of Exeter (författare)
Sitch, StephenLund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science,University of Exeter(Swepub:lu)extLU-837 (författare)
Seneviratne, Sonia I.ETH Zürich (författare)
Fletcher, ImogenUniversity of Exeter (författare)
Mueller, BrigitteEnvironment Canada,ETH Zürich (författare)
Greve, PeterETH Zürich (författare)
Anav, AlessandroUniversity of Exeter (författare)
Liu, YiUniversity of New South Wales (författare)
Ahlström, AndersLund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science(Swepub:lu)nate-ana (författare)
Huntingford, ChrisCentre for Ecology & Hydrology, Wallingford (författare)
Levis, SamNational Center for Atmospheric Research (författare)
Levy, PeterCentre for Ecology & Hydrology, Wallingford (författare)
Lomas, MarkUniversity of Sheffield (författare)
Poulter, BenjaminLaboratoire des Sciences du Climat et de l'Environnement (författare)
Viovy, NicholasMax Planck Institute for Biogeochemistry (författare)
Zaehle, SonkeUniversity of Maryland (författare)
Zeng, NingKarlsruhe Institute of Technology (författare)
University of ExeterBiologiska institutionen (creator_code:org_t)

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