西北地区植被覆盖度与气候因子响应关系探究  

Research on the relationship between vegetation coverage and climate factor response in Northwest China

作　　者：姜凯升 刘宇 刘英[2,3] 毕银丽 岳辉[2,3] JIANG Kaisheng;LIU Yu;LIU Ying;BI Yinli;YUE Hui(Hongshaquan Open Pit Coal Mine of Shenhua Xinjiang Energy Co.,Ltd.,Urumqi 838100,China;College of Geomatics,Xi'an University of Science and Technology,Xi'an 710054,China;Institute of Ecological Environment Restoration in Mine Areas of West China,Xi'an University of Science and Technology,Xi'an 710054,China;College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]国能新疆红沙泉能源有限责任公司,乌鲁木齐838100 [2]西安科技大学测绘科学与技术学院,西安710054 [3]西安科技大学西部矿山生态环境修复研究院,西安710054 [4]西安科技大学地质与环境学院,西安710054

出　　处：《测绘科学》2023年第6期172-180,共9页Science of Surveying and Mapping

基　　金：国家重点研发计划项目(2022YFF1303300);国家能源集团2030重大项目先导项目(GJNY2030XDXM1903.2)。

摘　　要：针对西北地区植被覆盖度(FVC)与气候因子的累积与时滞双效应研究较匮乏的问题,该文以西北5省(自治区)为研究区域,基于2000—2021年MOD13A2归一化植被指数(NDVI)数据、1 km降雨及气温数据,利用Mann-Kendall突变检验和偏相关分析,分析植被对降雨、温度的累积和时滞效应。结果表明:植被覆盖度变化总体较平稳,空间上中部戈壁表现为不显著减少,陕甘北部呈显著增加;气候因子变化不明显。农用地FVC对降雨的累积及滞后月数为4~5.5个月,气温的累积效应与农用地表现为强正相关(r=0.88),累积时间为5~7个月;荒漠戈壁在气候的累积及时滞关系上均呈正相关,干旱抵抗能力较强,气候因子的累积及滞后效应时间为4~7个月,新疆气温滞后效应最为明显,可达到8个月,主要体现在草地及林地类型。Aiming at the lack of studies on the cumulative and time-lag effects of vegetation coverage and climate factors in Northwest China,this paper took five provinces in Northwest China as the research area,based on MOD13A2 NDVI data,1 km rainfall and temperature data from 2000 to 2021,using Mann-Kendall mutation test and partial correlation analysis to analyze the cumulative and time-lag effects of vegetation on rainfall and temperature.The results showed that the change of fractional vegetation cover(FVC)was generally stable,the central Gobi showed no significant decrease in space,and the northern Shaanxi-Gansu showed a significant increase;the change of climate factors was not obvious.The accumulation and lag months of FVC of agricultural land on rainfall were 4~5.5 months,the cumulative effect of temperature was strongly positively correlated with agricultural land(r=0.88),and the accumulation time was 5~7 months;Both the accumulation and lag were positively correlated,and the ability to resist drought was strong.The cumulative and lag effects of climate factors were 4~7 months.The lag effect of temperature in Xinjiang was the most obvious,which could reach more than 8 months,mainly in grassland and Woodland type.

关 键 词：累积效应 时滞效应 植被覆盖度 降雨 温度 

分 类 号：P237[天文地球—摄影测量与遥感]