干旱气象 ›› 2019, Vol. 37 ›› Issue (2): 322-330.DOI: 10.11755/j.issn.1006-7639(2019)-02-0322

• 论文 • 上一篇    下一篇

基于卫星遥感的新疆地表太阳总辐射估算

彭冬梅1,陈鹏翔2,3,张旭2   

  1. 1.新疆兴农网信息中心,新疆 乌鲁木齐 830002;
    2.新疆气候中心,新疆 乌鲁木齐 830002;
    3.新疆应对气候变化与低碳发展研究中心,新疆 乌鲁木齐 830002
  • 出版日期:2019-04-30 发布日期:2019-04-30
  • 通讯作者: 陈鹏翔(1983—),男,高级工程师,从事区域气候变化领域研究工作. E-mail:cpx1860@163.com。
  • 作者简介:彭冬梅(1983— )女,工程师,从事农业气象领域研究工作. E-mail:124937440@qq.com。
  • 基金资助:
    国家自然科学基金(41505101)资助

Estimation of Surface Solar Total Radiation in Xinjiang Based on Satellite Remote Sensing Data

PENG Dongmei1, CHEN Pengxiang2,3, ZHANG Xu2   

  1. 1. Xinjiang Agriculture Network Information Center, Urumqi 830002, China;
    2. Xinjiang Climate Center, Urumqi 830002, China;
    3. Xinjiang Research Center for Climate Change and Low Carbon Development, Urumqi 830002, China
  • Online:2019-04-30 Published:2019-04-30

摘要: 为了实现地表太阳总辐射合理的精细化模拟,本文尝试将天文辐射分布式理论模型和总辐射气候学经验模型相结合,引入重采样后的FY-2G卫星遥感总云量资料,建立了基于卫星遥感数据的地表太阳总辐射估算模型,并以气象站点稀疏的新疆为例,完成年、季地表太阳总辐射的精细化空间模拟,同时对模拟结果进行分析和检验。结果表明:(1)新疆区域年天文辐射量由南向北递减,大致以天山为界,天山以南区域的年天文辐射量高于10 000 MJ·m-2,天山以北低于9750 MJ·m-2,三大山脉对天文辐射的影响非常明显;(2)基于条带状重采样后的FY-2G总云量建立的日照百分率模型,其模拟的新疆区域平均绝对误差14.4%,且空间分布更加客观;(3)新疆“单站单月式”地表太阳总辐射气候学估算模型中,相关系数在夏半年较高,冬半年略有下降,且a、b系数的互补关系较为稳定;(4)从地表太阳总辐射检验结果来看,全区地表太阳总辐射的均方根误差年平均3.08 MJ·m-2,模拟结果夏半年好于冬半年,南疆好于北疆,其中乌鲁木齐误差最大;(5)新疆年地表太阳总辐射整体表现为由西北向东南逐渐增加的空间分布,南疆盆地的总辐射量高于北疆盆地,天山山区西部为低值中心,而春、夏季总辐射由西向东呈经向分布,秋、冬季则呈纬向分布。

关键词: 地表太阳总辐射, FY-2G, 总云量, 新疆

Abstract: In order to reasonably and elaborately simulate the solar total radiation on the ground, based on the digital elevation model (DEM), total cloud amount of FY-2G satellite and the cloud amount, sunshine, radiation data from weather stations, and combined the distributed theoretical model of astronomical radiation and climatology empirical model of total radiation, the integrated remote sensing model of solar total radiation was established. And taking Xinjiang with sparse weather stations as an example, the annual and seasonal solar total radiation was simulated and tested. The results are as follows: (1) The annual total astronomical radiation decreased from south to north in Xinjiang, the annual total astronomical radiation was greater than 10 000 MJ·m-2 in the south of Tianshan Mountain and was less than 9750 MJ·m-2 in the north of Tianshan Mountain, and the influence of mountain topography on astronomical radiation was very obvious. (2) The mean absolute error of sunshine percentage in Xinjiang was 14.4% between the observation and simulation of sunshine percentage model based on total cloud amount from FY-2G satellite with the resampling scheme, and the spatial distribution of the simulated results was more objective. (3) The correlation coefficients in the climatology estimation model of solar total radiation with ‘single station and single month’ were higher in summer half year (from April to September), while that decreased slightly in winter half year, and the complementary relationship was steadier between a and b coefficients. (4) The test results show that the effect of simulation on solar total radiation in summer half year was better than that in winter half year, and in the south of Xinjiang it was better than that in the north, and the average annual root mean square error in the whole region was 3.08 MJ·m-2, the error in Urumqi was the maximum. (5) The annual solar total radiation increased from northwest to southeast in Xinjiang, and that in the basin of southern Xinjiang was higher than that in the basin of northern Xinjiang, the low value center located in the west of Tianshan Mountains. The solar total radiation increased gradually from west to east in Xinjiang in spring and summer, while that appeared the latitudinal distribution in autumn and winter.

Key words: surface solar total radiation, FY-2G, total cloud amount, Xinjiang

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