贵州省地表温度的遥感反演评价及时空分异规律

生态学杂志

贵州省地表温度的遥感反演评价及时空分异规律

胡泽银^1,2,3,王世杰^1,3,白晓永^1,3*,李琴^1,2,3,吴路华^1,2,3,钱庆欢^1,3,4,肖建勇^1,3,4,陈飞^1,3,4,曾成^1,3,4

(¹中国科学院地球化学研究所环境地球化学国家重点实验室，贵阳 550081；²中国科学院研究生院，北京 100049；³中国科学院普定喀斯特生态系统观测研究站，贵州普定 562100； ⁴贵州师范大学地理与环境科学学院，贵阳 550001）

出版日期:2018-09-10 发布日期:2018-09-10

Remote sensing retrieval and spatial-temporal differentiation of land surface temperature in Guizhou Province.

HU Ze-yin^1,2,3, WANG Shi-jie^1,3, BAI Xiao-yong^1,3*, LI Qin^1,2,3, WU Lu-hua^1,2,3, QIAN Qing-huan^1,3,4, XIAO Jian-yong^1,3,4, CHEN Fei^1,3,4, ZENG Cheng^1,3,4

(¹State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; ²University of Chinese Academy of Sciences, Beijing 100049, China; ³Puding Karst Ecosystem Observation and Research Station, Chinese Academy of Sciences, Puding 562100, Guizhou, China; ⁴School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550001, China).

Online:2018-09-10 Published:2018-09-10

摘要/Abstract

摘要： 地表温度(LST)是全球变化研究中的关键参数，对生态系统和生物地球化学等具有重要研究意义。然而，目前针对复杂地形区域的地表温度的研究仍非常欠缺，贵州省是典型的西南喀斯特高原地区，地形复杂，生态系统脆弱。本研究以贵州省为研究区，基于多年MODIS遥感数据，结合地面观测气象数据，使用相关分析、趋势分析、R/S分析和地理探测器等方法，进行地表温度的时空演变规律研究。结果表明：（1）MODIS LST与实测气温具有良好的线性相关性；（2）地表温度在空间上呈南高北低的空间分布格局；（3）在时间上，地表温度的年际波动较大，最大差值为2.06 ℃·a^-1，年内主要呈现单峰型分布；（4）海拔800 m以上区域，地表温度随海拔升高而降低；海拔800 m以下区域，地表温度与海拔呈非线性关系；（5）不同土地利用类型的地表温度之间存在显著差异，且最大差值为1.3 ℃。综上所述，研究区地表温度空间分布与纬度分布相对一致，受到海拔和纬度双重控制，且与土地利用类型有关。

关键词: 禁牧, 氮循环, 氮储量, 功能基因, 半干旱草地

Abstract: Land surface temperature (LST) is a crucial parameter for global change investigation, which is significant to ecosystem and biogeochemical researches. However, studies on LST of complex terrain areas are limited. Guizhou Province is a typical karst landform with complex terrain and fragile ecosystems. Based on multi-year MODIS remote sensing data combined with meteorological data in Guizhou Province, the temporal and spatial changes of LST were studied by using correlation analysis, trend analysis, R/S analysis and geographic detector. The results showed that: (1) The MODIS LST displayed a linear correlation with near surface temperature; (2) LST showed a spatial distribution of the south-high and north-low; (3) The interannual fluctuation of LST was large with the maximum difference of 2.06 ℃·a^-1, while the annual variation was mainly in unimodal distribution; (4) LST decreased with increasing elevation in the regains with >800 m above sea level, and exhibited a nonlinear relationship with elevation in the regions with <800 m above sea level; (5) There were significant differences in LST among different land-use types, with a maximum difference of 1.3 ℃. In summary, the spatial distributions of LST in the study area were relatively consistent with that of latitude, which was impacted by elevation and latitude and was related to land-use types.

Key words: nitrogen storage, semiarid grassland, functional genes, nitrogen cycling, grazing exclusion

胡泽银,王世杰,白晓永,李琴,吴路华,钱庆欢,肖建勇,陈飞,曾成. 贵州省地表温度的遥感反演评价及时空分异规律[J]. 生态学杂志.

HU Ze-yin, WANG Shi-jie, BAI Xiao-yong, LI Qin, WU Lu-hua, QIAN Qing-huan, XIAO Jian-yong, CHEN Fei, ZENG Cheng. Remote sensing retrieval and spatial-temporal differentiation of land surface temperature in Guizhou Province.[J]. cje.

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