Spatial-temporal Variation of Land Surface Temperature in Shangluo City and Its Influencing Factors

doi:10.11923/j.issn.2095-4050.cjas2021-0194

Abstract

Abstract:

Based on the daily 0 cm land surface temperature, air temperature, precipitation and sunshine duration observation data from 7 meteorological stations in Shangluo City from 1960 to 2020, the spatial-temporal variation of land surface temperature were investigated by M-K test and wavelet analysis, aiming to response to climate change and guide agricultural production and research reasonably. The results showed that the annual mean land surface temperature in Shangluo City increased gradually from northwest to southeast during 1960-2020. The seasonal mean temperature of land surface exhibited an order of summer > spring > autumn > winter. The land surface temperature was the lowest in January and the highest in July. The climatic tendency rate of land surface temperature was 0.37℃/10 a, and the increasing range decreased from west to east. Spring, winter and annual mean land surface temperature showed a warming trend year by year, and a mutation occurred in 1997. Four oscillation frequencies of land surface temperature (LST) were 6, 10, 14 and 28 years, and 6 years was the first main cycle, and 10 years was the second main cycle of LST variation. Altitude was the main geographical factor that affected land surface temperature in Shangluo City, while air temperature and sunshine duration were the main meteorological factors. The rise of land surface temperature could alleviate the disaster caused by low temperature to agricultural production and is beneficial to agricultural structural adjustment in a certain period of time.

Key words: land surface temperature, spatial-temporal distribution, mutation, wavelet analysis, Shangluo

CLC Number:

LI Liang, LIU Fan, WANG Hua, TIAN Liang, YAN Hongmei. Spatial-temporal Variation of Land Surface Temperature in Shangluo City and Its Influencing Factors[J]. Journal of Agriculture, 2022, 12(5): 24-29.

Figures/Tables 9

References 26

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年代际	年	春季	夏季	秋季	冬季
1960—1969	-1.01	-1.28	0.10	-0.99	-0.90
1970—1979	-0.39	-0.70	0.06	-0.33	-0.30
1980—1989	-0.54	-0.45	-1.01	-0.13	-0.28
1990—1999	0.04	-0.39	0.35	0.34	0.17
2000—2009	0.38	1.28	-0.16	0.21	0.54
2010—2019	0.91	1.30	1.02	0.88	0.74
2020—2020	0.92	1.39	0.88	0.88	0.83

年代际	年	春季	夏季	秋季	冬季
1960—1969	-1.01	-1.28	0.10	-0.99	-0.90
1970—1979	-0.39	-0.70	0.06	-0.33	-0.30
1980—1989	-0.54	-0.45	-1.01	-0.13	-0.28
1990—1999	0.04	-0.39	0.35	0.34	0.17
2000—2009	0.38	1.28	-0.16	0.21	0.54
2010—2019	0.91	1.30	1.02	0.88	0.74
2020—2020	0.92	1.39	0.88	0.88	0.83

气象因子	线性回归系数	R²
气温	1.175^*	0.994^*
降水量	-0.007	0.098
风速	-0.821	0.001
日照时数	0.087^*	0.204^*

气象因子	线性回归系数	R²
气温	1.175^*	0.994^*
降水量	-0.007	0.098
风速	-0.821	0.001
日照时数	0.087^*	0.204^*