Objective The risk of vegetation loss under temperature stress considering lag effects was assessed to provide a scientific basis for formulating regional adaptive management measures. Methods Using Heilongjiang Province as an example, a risk assessment method for vegetation loss under temperature stress considering lag effects was proposed based on weekly normalized difference vegetation index (NDVI) and temperature data. Quantifying the probability of warming and cooling stress risk in different terrestrial ecosystems in Heilongjiang Province. were quantified. Results Vegetation during the growing season is closely associated with temperature changes, reaching the most sensitive state at approximately 9 and 23 weeks of lag, respectively, and with high spatial consistency. The eastern and western regions of the study area are high-risk regions for vegetation loss, whereas the northwestern and central regions have a lower risk. For every 1 ℃ increase in the average temperature, the risk probability increased by approximately 0.5%, and for every 1 ℃ decrease, the risk increased by approximately 0.70%, indicating that cooling had a greater impact on vegetation than warming. The risk variation under temperature stress was higher in farmland ecosystems and lower in forest ecosystems. Conclusion The eastern and western regions of Heilongjiang Province are high-risk areas for vegetation loss, and cooling has a greater impact on vegetation than warming. This highlights the practical significance of comprehensively considering the lag effects of temperature stress to accurately assess vegetation health in the context of global climate change.
文献参数: 付晨星, 王雪梅, 李特, 等.考虑滞后效应的气温胁迫下植被损失风险评估[J].水土保持通报,2025,45(3):179-186. Citation:Fu Chenxing, Wang Xuemei, Li Te, et al. Vegetation loss risk assessment under temperature stress considering lag effects [J]. Bulletin of Soil and Water Conservation,2025,45(3):179-186.
日最大气温数据来自The Climate Prediction Center (CPC)的 Global Unified Temperature(https:∥psl.noaa.gov/data/gridded/data.cpc.globaltemp.html),空间分辨率为0.5°,日尺度。网格化每日归一化差异植被指数(NDVI)来自AVHRR归一化差异植被指数(NDVI)第5版的NOAA气候数据记录(https:∥www.ncei.noaa.gov),空间分辨率为0.05°。为了更好地匹配NDVI数据,我们将气温数据插值到0.05°分辨率上。此外,考虑到年内植被生长的物候期,本研究只选取了生长季的数据(每年第15~39周的NDVI)。生态系统划分数据来自Resource and Environmental Science Data Platform的2020年的1 km分辨率(https:∥www.resdc.cn/DOI/DOI.aspx?DOIID=131)。研究数据时间段为2002—2022年。
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