摘要
安徽省作为中国气候敏感和生态受损的地区,正面临极端气候事件影响日益显著的挑战。由于植被对干旱的响应存在不对称性,安徽省植被变化对干旱的响应尚不明确。针对这一问题,分析了2011-2020年安徽省标准化降水蒸散发指数(SPEI)和归一化植被指数(NDVI)的时空分布特征,探究了2011-2020年气象干旱对植被变化的影响。结果表明:安徽省2011-2020年SPEI在中部上升,整体空间呈干旱减弱趋势;相同时期NDVI整体下降,北部下降显著,中南部下降缓慢,东部微弱增加。通过SPEI和NDVI的相关关系及时滞效应分析,南、北部地区植被对干旱的响应几乎即时,而中部相对滞后,可能受其他因素的影响。该研究增进了对安徽省气候-植被关系的认识,为应对气候变化下干旱风险的防范提供了理论支撑。
Anhui Province,as a region sensitive to climate and ecologically vulnerable in China,is facing increasingly significant challenges from the impacts of extreme climate events.Due to the asymmetrical response of vegetation to drought,the specific impact of vegetation changes on drought in Anhui Province remains unclear.In order to address this issue,this study analyzes the spatiotemporal distribution characteristics of the Standardized Precipitation Evapotranspiration Index(SPEI)and Normalized Difference Vegetation Index(NDVI)in Anhui Province from 2011 to 2020 and explores the influence of meteorological drought on vegetation changes during this period.The research indicates that,from 2011 to 2020,SPEI in the central region of Anhui Province increased,showing an overall spatial trend of drought weakening.Concurrently,NDVI decreased overall during the same period,with a significant decline in the north,a slow decline in the central-southern regions,and a slight increase in the east.Through the analysis of the correlation and time lag effects between SPEI and NDVI,it was observed that vegetation response to drought is almost immediate in the northern and southern regions,while the central region exhibits a relative lag,possibly influenced by other factors.This study enhances our understanding of the climate-vegetation relationship in Anhui Province,providing theoretical support for addressing drought risks under climate change.
作者
黄梦楠
丛培月
莫李娟
寇艳梅
Huang Mengnan;Cong Peiyue;Mo Lijuan;Kou Yanmei(Anhui Key Laboratory of Water Conservancy and Water Resources,Bengbu 233000,Anhui,China;(Huaihe River Commission of the Ministry of Water Recourses)Institute of Hydraulic Research(Anhui Province Water Conservancy Engineering Quality Inspection Center Station),Bengbu 233000,Anhui,China;Nanjing Hydraulic Research Institute,Nanjing 210029,Jiangsu,China;Taihu Basin Hydrology and Water Resources Monitoring Center,Wuxi 214024,Jiangsu,China;Non-Commissioned Officer Academy,Space Engineering University,102200,Beijing,China)
出处
《绿色科技》
2024年第4期104-108,共5页
Journal of Green Science and Technology
关键词
气象干旱
植被变化
时滞效应
安徽省
meteorological drought
vegetation changes
time-lag effect
Anhui Province
