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The dry season intensity as a key driver of NPP trends

Murray-Tortarolo, Guillermo; Friedlingstein, Pierre; Sitch, Stephen LU ; Seneviratne, Sonia I.; Fletcher, Imogen; Mueller, Brigitte; Greve, Peter; Anav, Alessandro; Liu, Yi and Ahlström, Anders LU , et al. (2016) In Geophysical Research Letters 43(6). p.2632-2639
Abstract (Swedish)
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... (More)
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. (Less)
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keywords
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
in
Geophysical Research Letters
volume
43
issue
6
pages
8 pages
publisher
American Geophysical Union
external identifiers
  • scopus:84988352967
  • wos:000374697200037
ISSN
1944-8007
DOI
10.1002/2016GL068240
language
Swedish
LU publication?
yes
id
8863ab9b-2d93-4199-a135-aa488fb59e26
date added to LUP
2016-12-27 15:50:26
date last changed
2017-10-01 05:28:07
@article{8863ab9b-2d93-4199-a135-aa488fb59e26,
  abstract     = {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.},
  author       = {Murray-Tortarolo, Guillermo and Friedlingstein, Pierre and Sitch, Stephen and Seneviratne, Sonia I. and Fletcher, Imogen and Mueller, Brigitte and Greve, Peter and Anav, Alessandro and Liu, Yi and Ahlström, Anders and Huntingford, Chris and Levis, Sam and Levy, Peter and Lomas, Mark and Poulter, Benjamin and Viovy, Nicholas and Zaehle, Sonke and Zeng, Ning},
  issn         = {1944-8007},
  keyword      = {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},
  language     = {swe},
  number       = {6},
  pages        = {2632--2639},
  publisher    = {American Geophysical Union},
  series       = {Geophysical Research Letters},
  title        = {The dry season intensity as a key driver of NPP trends},
  url          = {http://dx.doi.org/10.1002/2016GL068240},
  volume       = {43},
  year         = {2016},
}