@article{Wu-2021-Widespread,
title = "Widespread decline in winds delayed autumn foliar senescence over high latitudes",
author = "Wu, Chaoyang and
Wang, Jian and
Ciais, Philippe and
Pe{\~n}uelas, Josep and
Zhang, Xiaoyang and
Sonnentag, Oliver and
Tian, Feng and
Wang, Xiaoyue and
Wang, Huanjiong and
Liu, Ronggao and
Fu, Yulan and
Ge, Quansheng",
journal = "Proceedings of the National Academy of Sciences, Volume 118, Issue 16",
volume = "118",
number = "16",
year = "2021",
publisher = "Proceedings of the National Academy of Sciences",
url = "https://gwf-uwaterloo.github.io/gwf-publications/G21-102001",
doi = "10.1073/pnas.2015821118",
abstract = "The high northern latitudes ({\textgreater}50{\mbox{$^\circ$}}) experienced a pronounced surface stilling (i.e., decline in winds) with climate change. As a drying factor, the influences of changes in winds on the date of autumn foliar senescence (DFS) remain largely unknown and are potentially important as a mechanism explaining the interannual variability of autumn phenology. Using 183,448 phenological observations at 2,405 sites, long-term site-scale water vapor and carbon dioxide flux measurements, and 34 y of satellite greenness data, here we show that the decline in winds is significantly associated with extended DFS and could have a relative importance comparable with temperature and precipitation effects in contributing to the DFS trends. We further demonstrate that decline in winds reduces evapotranspiration, which results in less soil water losses and consequently more favorable growth conditions in late autumn. In addition, declining winds also lead to less leaf abscission damage which could delay leaf senescence and to a decreased cooling effect and therefore less frost damage. Our results are potentially useful for carbon flux modeling because an improved algorithm based on these findings projected overall widespread earlier DFS than currently expected by the end of this century, contributing potentially to a positive feedback to climate.",
}
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<abstract>The high northern latitudes (\textgreater50°) experienced a pronounced surface stilling (i.e., decline in winds) with climate change. As a drying factor, the influences of changes in winds on the date of autumn foliar senescence (DFS) remain largely unknown and are potentially important as a mechanism explaining the interannual variability of autumn phenology. Using 183,448 phenological observations at 2,405 sites, long-term site-scale water vapor and carbon dioxide flux measurements, and 34 y of satellite greenness data, here we show that the decline in winds is significantly associated with extended DFS and could have a relative importance comparable with temperature and precipitation effects in contributing to the DFS trends. We further demonstrate that decline in winds reduces evapotranspiration, which results in less soil water losses and consequently more favorable growth conditions in late autumn. In addition, declining winds also lead to less leaf abscission damage which could delay leaf senescence and to a decreased cooling effect and therefore less frost damage. Our results are potentially useful for carbon flux modeling because an improved algorithm based on these findings projected overall widespread earlier DFS than currently expected by the end of this century, contributing potentially to a positive feedback to climate.</abstract>
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%0 Journal Article
%T Widespread decline in winds delayed autumn foliar senescence over high latitudes
%A Wu, Chaoyang
%A Wang, Jian
%A Ciais, Philippe
%A Peñuelas, Josep
%A Zhang, Xiaoyang
%A Sonnentag, Oliver
%A Tian, Feng
%A Wang, Xiaoyue
%A Wang, Huanjiong
%A Liu, Ronggao
%A Fu, Yulan
%A Ge, Quansheng
%J Proceedings of the National Academy of Sciences, Volume 118, Issue 16
%D 2021
%V 118
%N 16
%I Proceedings of the National Academy of Sciences
%F Wu-2021-Widespread
%X The high northern latitudes (\textgreater50°) experienced a pronounced surface stilling (i.e., decline in winds) with climate change. As a drying factor, the influences of changes in winds on the date of autumn foliar senescence (DFS) remain largely unknown and are potentially important as a mechanism explaining the interannual variability of autumn phenology. Using 183,448 phenological observations at 2,405 sites, long-term site-scale water vapor and carbon dioxide flux measurements, and 34 y of satellite greenness data, here we show that the decline in winds is significantly associated with extended DFS and could have a relative importance comparable with temperature and precipitation effects in contributing to the DFS trends. We further demonstrate that decline in winds reduces evapotranspiration, which results in less soil water losses and consequently more favorable growth conditions in late autumn. In addition, declining winds also lead to less leaf abscission damage which could delay leaf senescence and to a decreased cooling effect and therefore less frost damage. Our results are potentially useful for carbon flux modeling because an improved algorithm based on these findings projected overall widespread earlier DFS than currently expected by the end of this century, contributing potentially to a positive feedback to climate.
%R 10.1073/pnas.2015821118
%U https://gwf-uwaterloo.github.io/gwf-publications/G21-102001
%U https://doi.org/10.1073/pnas.2015821118
Markdown (Informal)
[Widespread decline in winds delayed autumn foliar senescence over high latitudes](https://gwf-uwaterloo.github.io/gwf-publications/G21-102001) (Wu et al., GWF 2021)
ACL
- Chaoyang Wu, Jian Wang, Philippe Ciais, Josep Peñuelas, Xiaoyang Zhang, Oliver Sonnentag, Feng Tian, Xiaoyue Wang, Huanjiong Wang, Ronggao Liu, Yulan Fu, and Quansheng Ge. 2021. Widespread decline in winds delayed autumn foliar senescence over high latitudes. Proceedings of the National Academy of Sciences, Volume 118, Issue 16, 118(16).
