昼夜不对称性增温对秦巴山地植被NDVI的影响研究  

Effects of Day and Night Asymmetric Warming on Different Vegetation Types in Qinling-Daba Mountains

作　　者：李理 刘俊杰 赵芳[3] 朱文博 董庆栋 朱连奇[3] LI Li;LIU Junjie;ZHAO Fang;ZHU Wenbo;DONG Qindong;ZHU Lianqi(School of Government,Beijing Normal University,Beijing 100875,China;Institute of Geographic Sciences and Natural Resources Research,Bejing 100101,China;College of Geography and Environment,Henan University,Kaifeng 475004,China)

机构地区：[1]北京师范大学政府管理学院,北京100875 [2]中国科学院地理科学与资源研究所,北京100101 [3]河南大学地理与环境学院,河南开封475004

出　　处：《地域研究与开发》2023年第1期161-166,173,共7页Areal Research and Development

基　　金：国家重点研发计划(2021YFE0106700);国家自然科学基金项目(41671090);科技基础资源调查专项(2017FY100902)。

摘　　要：通过收集1982—2020年秦巴山地94个气象站点逐日观测资料、2000—2020年MODIS归一化植被指数(NDVI)以及中国1100万植被数据集,利用Mann-Kendall检验、趋势分析以及二阶偏相关分析等方法,综合分析秦巴山地昼夜增温时序变化及增速差异,探讨秦巴山地植被NDVI对昼夜不对称增温的响应特征,分析昼夜不对称增温对不同植被类型生长的影响。结果表明:(1)1982—2020年秦巴山地日最低气温和日最高气温存在明显上升趋势,夜间增温速率是白天增温速率的1.3倍,表明昼夜增温存在不对称性。(2)昼夜增温对秦巴山地植被生长促进作用更明显,显著性分析结果存在空间差异,但通过显著性检验的站点数量不多。(3)不同植被类型对昼夜增温响应特征有所差别,白天增温促进草丛、草甸、灌丛、阔叶林、农作物的生长,抑制了针叶林的生长,而夜间增温对植被生长的影响仅对草甸起积极影响,对其他植被类型均为消极影响。The daily observation from 94 meteorological stations in the Qinba mountains from 1982 to 2020,MODIS normalized vegetation index(NDVI)from 2000 to 2020,and 1:100 million vegetation datasets in China were collected.The Mann-Kendall(M-K)test,trend analysis and second-order partial correlation analysis were used to comprehensively analyze the diurnal temperature increase and growth rate in the Qinba mountains,to explore the response of NDVI to diurnal asymmetric temperature increase,and to analyze the effects of diurnal asymmetric temperature increase on the growth of various vegetation types.The results show that:(1)From 1982 to 2020,Tmax and Tmin had an obvious upward trend,and the temperature increase rate at the night was 1.2 times that in the daytime,indicating that there was asymmetry in the temperature increase between day and night in the Qinling-Daba mountains.(2)The diurnal warming had a more significant effect on vegetation growth promotion in the Qinlin-Daba Mountains,and the results of the significance analysis showed spatial differences,but the number of sites passing the significance test was small.(3)The response characteristics of different vegetation types to diurnal warming differed,with daytime warming promoting the growth of grasses,meadows,scrub,broadleaf forests and crops and suppressing the growth of coniferous forests,while the effect of nighttime warming on vegetation growth was positive only for meadows and negative for all other vegetation types.

关 键 词：气候变化 昼夜增温 植被NDVI 偏相关分析 秦巴山地 

分 类 号：S159.2[农业科学—土壤学]