Weakened connection between spring leaf-out and autumn senescence in the Northern Hemisphere

Bibliographische Detailangaben
Veröffentlicht in:	Global change biology. - 1999. - 30(2024), 7 vom: 15. Juli, Seite e17429
1. Verfasser:	Zhang, Yichen (VerfasserIn)
Weitere Verfasser:	Hong, Songbai, Peñuelas, Josep, Xu, Hao, Wang, Kai, Zhang, Yao, Lian, Xu, Piao, Shilong
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2024
Zugriff auf das übergeordnete Werk:	Global change biology
Schlagworte:	Journal Article acclimation autumn senescence biological carryover effect climate change phenology vegetation dynamic

Beschreibung
Zusammenfassung:	© 2024 John Wiley & Sons Ltd. Vegetation autumn phenology is critical in regulating the ecosystem carbon cycle and regional climate. However, the dominant drivers of autumn senescence and their temporal shifts under climate change remain poorly understood. Here, we conducted a multi-factor analysis considering both direct climatic controls and biological carryover effects from start-of-season (SOS) and seasonal peak vegetation activities on the end-of-season (EOS) to fill these knowledge gaps. Combining satellite and ground observations across the northern hemisphere, we found that carryover effects from early-to-peak vegetation activities exerted greater influence on EOS than the direct climatic controls on nearly half of the vegetated land. Unexpectedly, the carryover effects from SOS on EOS have significantly weakened over recent decades, accompanied by strengthened climatic controls. Such results indicate the weakened constraint of leaf longevity on senescence due to prolonged growing season in response to climate change. These findings underscore the important role of biological carryover effects in regulating vegetation autumn senescence under climate change, which should be incorporated into the formulation and enhancement of phenology modules utilized in land surface models
Beschreibung:	Date Completed 23.07.2024 Date Revised 23.07.2024 published: Print Citation Status MEDLINE
ISSN:	1365-2486
DOI:	10.1111/gcb.17429