文献类型：期刊文献

英文题名：Macro- and Micro-Climate-Controlled Impacts of Heatwave With Drought on the Autumn Phenology of a Subtropical Forest Ecosystem

作者：Zhou, Wei[1,2,3] Tian, Zhenpeng[1,2,3] Zhang, Yao[4,5] Ju, Weimin[3,6,7] Tan, Mou Leong[8] Yang, Yun[9] Sun, Fangfang[10] Dai, Lu[11] Liu, Jing[1,2,3] Sun, Honggang[12] Ma, Qin[1,2,3,13]

第一作者：Zhou, Wei

通信作者：Ma, Q[1];Ma, Q[2];Ma, Q[3];Ma, Q[4]

机构：[1]Nanjing Normal Univ, Sch Geog, Nanjing, Peoples R China;[2]Nanjing Normal Univ, Key Lab Virtual Geog Environm, Minist Educ, Nanjing, Peoples R China;[3]Jiangsu Ctr Collaborat Innovat Geog Informat Resou, Nanjing, Peoples R China;[4]Peking Univ, Sino French Inst Earth Syst Sci, Coll Urban & Environm Sci, Beijing, Peoples R China;[5]Peking Univ, Inst Carbon Neutral, Beijing, Peoples R China;[6]Nanjing Univ, Int Inst Earth Syst Sci, Frontiers Sci Ctr Crit Earth Mat Cycling, Nanjing, Peoples R China;[7]Nanjing Univ, Sch Geog & Ocean Sci, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Key Lab Land Satellite Remote Sensing Applicat,Min, Nanjing, Peoples R China;[8]Univ Sains Malaysia, Sch Humanities, GeoInformat Unit, Geog Sect, George Town, Malaysia;[9]Mississippi State Univ, Mississippi State, MS USA;[10]Shenzhen Acad Environm Sci, Shenzhen, Peoples R China;[11]Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA USA;[12]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou, Peoples R China;[13]State Key Lab Climate Syst Predict & Risk Manageme, Nanjing, Peoples R China

年份：2025

卷号：130

期号：5

外文期刊名：JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES

收录：;Scopus(收录号：2-s2.0-105005777900);WOS:【SCI-EXPANDED(收录号:WOS:001490961000001)】；

基金：This work was supported by the National Key Research and Development Program of China (2023YFB3907401), the National Natural Science Foundation of China (Grant 42201366) and the National Key Technologies Research and Development Program of China (Grant 2021YFD2201303-03). Q.M. is also supported by the Jiangsu Specially Appointed Professor, the research fund provided by Nanjing Normal University (Grant 184080H202B349).

语种：英文

外文关键词：heatwave with flash drought; autumn phenology; macro- and micro-climate; subtropical forest

摘要：Heatwave and flash droughts are increasingly diminishing global vegetation productivity. Phenology, a key indicator of vegetation ecosystem responses to climate change, is crucial for regulating terrestrial carbon and water cycles. How heatwave with flash drought would influence phenology, particularly the autumn phenology, remains under-explored. Here we studied the heatwave with flash drought in summer 2022 over a subtropical forest ecosystem in China, and investigated its effects on autumn phenology from multiple aspects. We quantified land surface phenology using the MCD12Q2 derived End of Season (EOS) and compared the EOS in 2022 with that in normal years between 2000 and 2021. We found EOS was 8 days earlier than normal year, which indicated forests dropping leaf earlier to avoid excessive water loss and to increase survival rate. But their sensitivity to the event varied by macro-climatic conditions, terrain features, and forest attributes. Higher summer temperature advanced the EOS by approximately 1.49 days per 1 degrees C (R2 = 0.82). Microclimatic differences determined by terrain also impacted the EOS, with EOS advancing by 1 day for every 100 m decrease in elevation and 1 day for every 3.5 degrees decrease in slope, respectively (R2 = 0.94 and 0.95). Forests with different structural and composition features also responded differently to the extreme events. Coniferous forests were the least affected, while mature and taller forests showed greater resilience with less EOS advancement. These findings underscore the complex interactions between climatic events and ecosystem responses, highlighting the need for targeted conservation strategies and biodiversity protection.