基于多源数据的昆仑山北坡地表太阳辐射调查评估

doi:10.12118/j.issn.1000-6060.2024.140

Abstract

Abstract:

Surface solar radiation is pivotal in the global energy balance and serves as the primary driver of climate change and the hydrological cycle. Despite its significance, the complexity of solar radiation components and the prohibitive cost of measurement instruments have resulted in a scarcity of long-term, reliable observation data in high-altitude mountain areas. This study utilizes the high-resolution homogeneous grid dataset of Chinese land surface climate observations alongside the ERA5 reanalysis radiation dataset to analyze the variation characteristics of surface solar radiation at different time scales over the north slope of the Kunlun Mountains from 1984 to 2023. Moreover, it employs the geographical detector model to examine the relationship between surface solar radiation and atmospheric factors. The findings indicate that: (1) The average annual surface solar radiation on the north slope of the Kunlun Mountains exhibited a significant decreasing trend during the study period, with a rate of -1.24 W·m^-2·(10a)^-1. Seasonally, the decline was most pronounced during summer. The monthly average surface solar radiation increased initially, peaking in June, before subsequently declining. (2) The spatial distribution of surface solar radiation on the north slope of the Kunlun Mountains gradually decreases from south to north. The variation trends differ between the east and west; except in winter, the eastern decline rate exceeded that of the west throughout the year, including during spring, summer, and autumn. (3) Single-factor detection results reveal that the explanatory capabilities of atmospheric factors on the spatial differentiation of surface solar radiation vary, with water vapor demonstrating a higher explanatory ability (q=0.90). These findings confirm that water vapor is a critical factor influencing the spatial distribution of solar radiation on the north slope of the Kunlun Mountains.

Key words: surface solar radiation, spatiotemporal variation, influencing factors, north slope of Kunlun Mountains

ZHANG Lu, SUN Meiping, YAN Xin, WANG Weisheng, FAN Ruiyi. Investigation and evaluation of surface solar radiation on the north slope of Kunlun Mountains based on multi-source data[J].Arid Land Geography, 2024, 47(8): 1304-1313.

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数据类型	数据	来源	数据处理方法	时段	空间分辨率	时间分辨率
卫星遥感产品	均一化中国陆表气候观测格点数据集（SSR-wang）	青藏高原科学数据中心	地理加权回归	1983.07—2017.06	0.1°	逐月
	全球高分辨率地表太阳辐射数据集（SSR-tang）		SUNFLUX方案	1983.07—2018.12	0.1°	3 h
	中国区域地面气象要素驱动数据集（CMFD）		Yang-混合模型	1979.01—2018.12	0.1°	3 h
再分析数据	ERA5	ECMWF	4D-Var同化	1979年至今	0.25°×0.25°	1 h
再分析数据	MERRA-2	NASA	4D-Var耦合同化	1980年至今	0.5°×0.625°	1 h

时间尺度	总云量/(10a)^-1	低云量/(10a)^-1	AOD/(10a)^-1	水汽/kg·m^-2·(10a)^-1	臭氧/DU·(10a)^-1
年	-0.0057	0.0019	0.0049	0.2779^*	-2.2210^*
春季	-0.0178^*	-0.0024	0.0032	0.0732	-3.2164
夏季	0.0091	0.0082^*	0.0180^*	0.7234^*	-1.5928
秋季	0.0033	0.0032^*	0.0045	0.3746^*	-1.2893
冬季	-0.0174^*	-0.0013	-0.0059	-0.0596	-2.7857

Investigation and evaluation of surface solar radiation on the north slope of Kunlun Mountains based on multi-source data

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