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
Citations
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Journal ArticleDOI
Characterizing ecosystem phenological diversity and its macroecology with snow cover phenology
Yi Lin,Juha Hyyppä +1 more
TL;DR: It is found that the circumpolar green-up and brown-up EPDs both were shrinking, driven more by the delaying of the onset SPDs than the advancing of the end SPDs; North America and North Eurasia performed with inconsistent EPD response/feedbacks to the related SPD anomalies; and further, the EPD-SPD response/ Feedback effect exhibited the time-lag effect.
Journal ArticleDOI
A Novel Large-Scale Temperature Dominated Model for Predicting the End of the Growing Season.
TL;DR: The results indicated that the model showed better performance in representing the spatial and interannual variability of leaf senescence, compared with the original phenology model in the Integrated Biosphere Simulator (IBIS), and the temperature threshold of grassland was lower than that of woody species in the same latitudinal zone.
Journal ArticleDOI
Direct and Legacy Effects of Spring Temperature Anomalies on Seasonal Productivity in Northern Ecosystems
Hanna Marsh,Wenxin Zhang +1 more
TL;DR: In this article , impacts of spring temperature anomalies on spring, summer and autumn GPP were investigated, and the dominant drivers of summer GPP including air temperature, vapor pressure deficit and soil moisture have been explored for northern ecosystems (>30°N).
Book ChapterDOI
NightWarming Affecting Interspecific Interactions: Implications for Biological Control
TL;DR: In this article, the effects of night warming on plants, herbivorous insects, natural enemies and their interactions are investigated and the authors emphasize the importance of night-warming effects on biological control, pest management and ecosystem functioning.
Journal ArticleDOI
Greenness Index from Phenocams Performs Well in Linking Climatic Factors and Monitoring Grass Phenology in a Temperate Prairie Ecosystem
TL;DR: In this paper, the authors investigated the response of grass Gcc to daily environmental factors in 2018, such as soil moisture (temperature), air temperature, and solar radiation, and found that daily Gcc was in good agreement with ground-level environmental variables.
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