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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Dissertation
Comprendre et prédire la réponse des écosystèmes forestiers d'altitude aux changements climatiques. Apports d'un programme de sciences participatives
TL;DR: In this article, the authors used a set of modeles phenologiques (debourrement, floraison, senescence foliaire) to evaluate the repartition of arborees in the presence of rechauffement.
Journal ArticleDOI
A global increase in tree cover extends the growing season length as observed from satellite records
TL;DR: In this paper , the authors studied the impact of changes in tree cover on satellite observed land surface phenology at a global scale over the past three decades and found an extension of the growing season length in 36.6% of the areas where tree cover increased, whereas only 20.1% of those areas with tree cover decreased.
Journal ArticleDOI
Earlier leaf senescence dates are constrained by soil moisture
TL;DR: In this paper , a new model based on soil moisture constrained cooling degree days (CDDSM) was developed to characterize the effects of soil moisture on LSD and compared its performance with the CDD, Delpierre and springinfluenced autumn models.
Journal ArticleDOI
Diverse responses of vegetation phenology to changes in temperature and precipitation in Northern China
TL;DR: Wang et al. as mentioned in this paper analyzed the response relationship of SOS and EOS to average temperature and precipitation in each period and found that SOS, EOS, the average timing of SOS (AvSOS), and the average time of EOS (AvEOS) all had strong spatial heterogeneity.
Journal ArticleDOI
Diverse variations in middle and high latitudes of the Northern Hemisphere spring phenology sensitivity to diurnal temperature during 1982–2015
Guorong Deng,Hongyan Zhang,Jianjun Zhao,Xiaoyi Guo,Ehsan Biniyaz,Hang Zhao,Dan Guo,Rihan Wu,Hui Li +8 more
TL;DR: In this article , the sensitivity of the growing season (SOS) to daytime and night-time temperatures (ST_daytime) and the influence of nighttime temperature on SOS is investigated.
References
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