2007～2016年广西地表温度时空分异规律及其影响因素

以GIS、RS技术为支撑,利用2007-2016年MOD11A2数据,对广西地表温度时空分异规律及其影响因素进行分析。结果表明：(1)广西年均LST值在23.19~23.87℃之间,多年LST均值为23.64℃,2008、2010、2014年较为突出,分别超出多年LST均值0.22℃、0.15℃、0.12℃；LST值月际呈现先上升后下降的趋势；各季节LST值,夏季最高,冬季最低。(2)空间上,LST值呈现出西南高于东北的格局。高温区分布在左江、右江河谷及北部湾沿岸区域,而低温区分布在东北部。(3)不同岩性LST值由小到大为非碳酸盐岩<白云岩石灰岩互层<连续性白云岩<连续性石灰岩<白云岩碎屑岩<石灰岩碎屑岩；各种岩性LST处于中温等级面积比例最高,白云岩碎屑岩的极高温面积比例最大,非碳酸盐岩和白云岩碎屑岩的极低温面积比例较大。(4)不同土地利用类型,建设用地的LST值最高,而水域的最低；水域、草地、林地、耕地的LST较稳定,而建设用地的LST变化剧烈。

Spatial and Temporal Variation of Surface Temperature in Guangxi from 2007 to 2016 and Its Influencing Factors

Supported by GIS,RS technology, using the MOD11A2 data from 2007 to 2016, the spatial and temporal differentiation of surface temperature in Guangxi and its influencing factors were analyzed. The results show: (1) The average annual LST value of Guangxi fluctuated between 23.19~23.87 °C. The average LST of many years was 23.64 °C. It was more prominent in 2008, 2010 and 2014, respectively, higher than the average LST of 0.22 °C, 0.15 °C and 0.12 °C. The LST value showed a trend of rising first and then decreasing. The LST value in each season is highest in summer and lowest in winter. (2) In terms of space, the LST value shows a pattern in which the southwest is higher than the northeast. The high temperature areas are distributed in the Zuojiang, Youjiang, and Beibu Gulf coastal areas, while the low temperature areas are distributed in the northeast. (3) Different lithological LST values from small to large are non-carbonate rocks < dolomite limestone interbeds < dolomites < limestone < dolomite clastic interbeds < limestone clastic interbeds. The proportion of various lithologic LSTs in the middle temperature grade area is the highest, the ratio of the extremely high temperature area of the dolomite clastic rock interbedded layer is the largest, and the ratio of the ultra-low temperature area of the non-carbonate rock and dolomite clastic rock interbedded layer is larger. (4) Among the land use types, the construction land has the highest LST value and the lowest water area. The LST of waters, grasslands, woodlands and cultivated land is relatively stable, while the LST of construction land is drastically changed.