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Evidence for a weakening relationship between interannual temperature variability and northern vegetation activity.

Piao, Shilong; Nan, Huijuan; Huntingford, Chris; Ciais, Philippe; Friedlingstein, Pierre; Sitch, Stephen; Peng, Shushi; Ahlström, Anders LU ; Canadell, Josep G and Cong, Nan, et al. (2014) In Nature Communications 5.
Abstract
Satellite-derived Normalized Difference Vegetation Index (NDVI), a proxy of vegetation productivity, is known to be correlated with temperature in northern ecosystems. This relationship, however, may change over time following alternations in other environmental factors. Here we show that above 30°N, the strength of the relationship between the interannual variability of growing season NDVI and temperature (partial correlation coefficient RNDVI-GT) declined substantially between 1982 and 2011. This decrease in RNDVI-GT is mainly observed in temperate and arctic ecosystems, and is also partly reproduced by process-based ecosystem model results. In the temperate ecosystem, the decrease in RNDVI-GT coincides with an increase in drought. In... (More)
Satellite-derived Normalized Difference Vegetation Index (NDVI), a proxy of vegetation productivity, is known to be correlated with temperature in northern ecosystems. This relationship, however, may change over time following alternations in other environmental factors. Here we show that above 30°N, the strength of the relationship between the interannual variability of growing season NDVI and temperature (partial correlation coefficient RNDVI-GT) declined substantially between 1982 and 2011. This decrease in RNDVI-GT is mainly observed in temperate and arctic ecosystems, and is also partly reproduced by process-based ecosystem model results. In the temperate ecosystem, the decrease in RNDVI-GT coincides with an increase in drought. In the arctic ecosystem, it may be related to a nonlinear response of photosynthesis to temperature, increase of hot extreme days and shrub expansion over grass-dominated tundra. Our results caution the use of results from interannual time scales to constrain the decadal response of plants to ongoing warming. (Less)
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Nature Communications
volume
5
publisher
Nature Publishing Group
external identifiers
  • pmid:25318638
  • wos:000343935000001
  • scopus:84927133050
ISSN
2041-1723
DOI
10.1038/ncomms6018
project
MERGE
language
English
LU publication?
yes
id
283ac964-5e02-4430-936c-6914dbdf4bc7 (old id 4736845)
date added to LUP
2014-11-14 12:24:52
date last changed
2017-11-19 03:55:10
@article{283ac964-5e02-4430-936c-6914dbdf4bc7,
  abstract     = {Satellite-derived Normalized Difference Vegetation Index (NDVI), a proxy of vegetation productivity, is known to be correlated with temperature in northern ecosystems. This relationship, however, may change over time following alternations in other environmental factors. Here we show that above 30°N, the strength of the relationship between the interannual variability of growing season NDVI and temperature (partial correlation coefficient RNDVI-GT) declined substantially between 1982 and 2011. This decrease in RNDVI-GT is mainly observed in temperate and arctic ecosystems, and is also partly reproduced by process-based ecosystem model results. In the temperate ecosystem, the decrease in RNDVI-GT coincides with an increase in drought. In the arctic ecosystem, it may be related to a nonlinear response of photosynthesis to temperature, increase of hot extreme days and shrub expansion over grass-dominated tundra. Our results caution the use of results from interannual time scales to constrain the decadal response of plants to ongoing warming.},
  articleno    = {5018},
  author       = {Piao, Shilong and Nan, Huijuan and Huntingford, Chris and Ciais, Philippe and Friedlingstein, Pierre and Sitch, Stephen and Peng, Shushi and Ahlström, Anders and Canadell, Josep G and Cong, Nan and Levis, Sam and Levy, Peter E and Liu, Lingli and Lomas, Mark R and Mao, Jiafu and Myneni, Ranga B and Peylin, Philippe and Poulter, Ben and Shi, Xiaoying and Yin, Guodong and Viovy, Nicolas and Wang, Tao and Wang, Xuhui and Zaehle, Soenke and Zeng, Ning and Zeng, Zhenzhong and Chen, Anping},
  issn         = {2041-1723},
  language     = {eng},
  publisher    = {Nature Publishing Group},
  series       = {Nature Communications},
  title        = {Evidence for a weakening relationship between interannual temperature variability and northern vegetation activity.},
  url          = {http://dx.doi.org/10.1038/ncomms6018},
  volume       = {5},
  year         = {2014},
}