Leaf onset in the northern hemisphere triggered by daytime temperature
Shilong Piao,Jianguang Tan,Anping Chen,Yongshuo H. Fu,Philippe Ciais,Qiang Liu,Ivan A. Janssens,Sara Vicca,Zhenzhong Zeng,Su-Jong Jeong,Yue Li,Ranga B. Myneni,Shushi Peng,Miaogen Shen,Josep Peñuelas +14 more
TLDR
This work shows that the interannual anomalies of LUD during 1982–2011 are triggered by daytime (Tmax) more than by nighttime temperature (Tmin), and suggests a new conceptual framework of leaf onset using daytime temperature to improve the performance of phenology modules in current Earth system models.Abstract:
Recent warming significantly advanced leaf onset in the northern hemisphere. This signal cannot be accurately reproduced by current models parameterized by daily mean temperature (Tmean). Here using in situ observations of leaf unfolding dates (LUDs) in Europe and the United States, we show that the interannual anomalies of LUD during 1982–2011 are triggered by daytime (Tmax) more than by nighttime temperature (Tmin). Furthermore, an increase of 1 Ci nTmax would advance LUD by 4.7 days in Europe and 4.3 days in the United States, more than the conventional temperature sensitivity estimated from Tmean. The triggering role of Tmax, rather than the Tmin or Tmean variable, is also supported by analysis of the large-scale patterns of satellite-derived vegetation green-up in spring in the northern hemisphere (430N). Our results suggest a new conceptual framework of leaf onset using daytime temperature to improve the performance of phenology modules in current Earth systemread more
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Responses of vegetation green-up date to temperature variation in alpine grassland on the Tibetan Plateau
TL;DR: In this paper, the authors evaluated 14 years of field GUD observations of sedge species Kobresia humilis on the Tibetan Plateau and found that January and March-April were two critical periods in determining the long-term GUD variations.
Journal ArticleDOI
Forest Phenology Shifts in Response to Climate Change over China–Mongolia–Russia International Economic Corridor
TL;DR: In this article, the authors examined the long-term changes in forest phenology and the associated relationship with the temperature and snow water equivalent in the China-Mongolia-Russia International Economic Corridor.
Journal ArticleDOI
Evidence of an extreme weather‐induced phenological mismatch and a local extirpation of the endangered Karner blue butterfly
Tamatha A. Patterson,Ralph Grundel,Jason D. K. Dzurisin,Randy L. Knutson,Jessica J. Hellmann +4 more
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Contrasting drought impacts on the start of phenological growing season in Northern China during 1982-2015
Journal ArticleDOI
Time to branch out? Application of hierarchical survival models in plant phenology
TL;DR: In this article, the authors leveraged two national, standardized phenology datasets to develop a multi-species and multi-site state-space survival model of the onset of deciduous tree and shrub spring (leaf out) and fall (leaf color) events across temperate ecoregions of the United States.
References
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