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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Impact of extreme climates on land surface phenology in Central Asia
TL;DR: In this paper , the authors evaluated the effects of extreme climate on land surface phenology in Central Asia (CA) based on 13 extreme climate indices (ECIs) and found that the start of the season (SOS) of the LSP was gradually delayed, the end of the seasons (EOS) advanced, and the length of the growing season (LOS) shortened.
Journal ArticleDOI
Sensitivity of Green-Up Date to Meteorological Indicators in Hulun Buir Grasslands of China
Jian Guo,Xiuchun Yang,Fan Chen,Min Zhang,Xiaoyu Xing,Ang Chen,Peng Yun,Liwei Jiang,Dong Yang,Bin Xu +9 more
TL;DR: In this paper , the authors examined the partial correlation and sensitivity of green-up date (GUD) to Tmax, Tmin, and precipitation, and found that the average GUD across the whole area was DOY 113.1 days/decade and the 25% region advanced significantly.
Posted ContentDOI
A warmer growing season triggers earlier following spring phenology
TL;DR: In this paper, Wang et al. showed that warmer temperatures during the previous growing season between May and September led to earlier spring phenology in the Northern Hemisphere, and they also found that warming-induced increases in maximum photosynthetic rate in the previous year advanced the spring phenotype.
Journal ArticleDOI
Influences of Seasonal Soil Moisture and Temperature on Vegetation Phenology in the Qilian Mountains
TL;DR: In this article , the authors used a time series of the normalized difference vegetation index (NDVI) from the moderate resolution imaging spectroradiometer (MODIS) dataset (2001-2020), the start of the growing season (SOS), the end of the grow season (EOS), and the length of the Growing Season (LOS) in the Qilian Mountains (QLMs) were extracted.
Dissertation
Remote sensing phenology at European northern latitudes - From ground spectral towers to satellites
TL;DR: In this paper, the authors proposed a spectral index for reliable retrieval of remote sensing phenology and climate sensitivity estimation at European northern latitudes, which is derived from a radiative transfer equation and uses red and near infrared reflectance.
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