基于MODIS云量产品的湖北省格点日照时数计算

doi:10.3969/j.issn.1673-503X.2024.03.016

Abstract

Abstract:

Using MODIS remote sensing cloud cover data from 2019 to 2021, based on the negative correlation between surface meteorological observation sunshine percentage and satellite remote sensing cloud cover, an inversion calculation model was established for different months and regions. The monthly sunshine percentage and sunshine hours at a spatial resolution of 1 km were calculated, and representative surface meteorological station observation data were selected to verify the calculation results of sunshine hours. The results show that there is a highly significant correlation between the monthly average remote sensing cloud cover and the percentage of sunshine in different climatic regions of Hubei province. The relative error in calculating annual (monthly) sunshine hours at each representative station is less than 2% (10 hours), indicating that the constructed sunshine hours inversion model has high calculation accuracy. The calculated annual sunshine hours in Hubei range from 854.8 hours to 1952.8 hours. The southwestern western regions of Hubei province have the lowest sunshine hours, with annual sunshine hours below 1100 hours. The northeastern northern and northwestern southern regions of Hubei province have the highest sunshine hours, with annual sunshine hours exceeding 1850 hours. From the inversion results of sunshine hours, it is also found that due to the thermal conditions differences between water and land, the cloud cover over lakes in the Hubei plain areas are less than that of surrounding land, and the sunshine hours are larger than that of surrounding land.

Key words: Cloud cover, Sunshine hours, Sunshine percentage

CLC Number:

P422.1

Chi CHENG,Yang CUl,Dan MENG. Calculation of sunshine hours at grid points in Hubei province based on MODIS cloud products[J]. Journal of Meteorology and Environment, 2024, 40(3): 131-137.

Figures/Tables 9

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References 21

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区域	模型参数a	模型参数b	相关系数R
鄂东北	103.64	-0.8588	0.855
鄂东南	84.77	-0.7040	0.870
江汉平原	112.85	-0.9865	0.844
鄂西北	108.29	-0.9702	0.852
鄂西南	111.68	-1.0626	0.862

时间		武汉	麻城	咸宁	枣阳	恩施
	实测	96.6	121.3	98	92.4	53.1
1月	计算	91.4	126.9	95.1	98.4	60.5
	误差	5.2	-5.6	2.9	-6	-7.4
	实测	137.6	148.5	114.5	153.8	100.5
4月	计算	134.5	149.1	107.7	159.6	98.4
	误差	3.1	-0.6	6.8	-5.8	2.1
	实测	192.5	199.4	152.1	209.3	190.3
7月	计算	194	199.7	156.4	205.9	181.1
	误差	-1.5	-0.3	-4.3	3.4	9.2
	实测	140.7	167	127.1	128.7	107.1
10月	计算	148.7	164.4	128.9	129.5	113.6
	误差	-8	2.6	-1.8	-0.8	-6.5
	实测	1615.7	1831.5	1373.3	1560.1	1146.6
全年	计算	1603.3	1846.6	1362.3	1579.5	1124.3
	误差	12.4	-15.1	11	-19.4	22.3

湖泊(常年水体面积)	水体平均日照时数/h	周边陆地平均日照时数/h	水陆日照时数差值/h
A长湖(122 km²)	1682.4	1592.1	90.3
B洪湖(348 km²)	1716.9	1617.1	99.8
C梁子湖(227 km²)	1814.6	1741.8	72.8
D龙感湖(154 km²)	1711.1	1634.2	76.9

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Calculation of sunshine hours at grid points in Hubei province based on MODIS cloud products

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