气象学报(英文版)
氣象學報(英文版)
기상학보(영문판)
ACTA METEOROLOGICA SINICA
2015年
1期
144-154
,共11页
朱晓晨%邱新法%曾燕%高佳琦%何永健
硃曉晨%邱新法%曾燕%高佳琦%何永健
주효신%구신법%증연%고가기%하영건
sunshine duration%digital elevation model data%moderate-resolution imaging spectroradiome-ter (MODIS)%cloud cover%remote sensing estimation model
Sunshine duration (SD) is strongly correlated with solar radiation, and is most widely used to estimate the latter. This study builds a remote sensing model on a 100 m × 100 m spatial resolution to estimate SD for the Ningxia Hui Autonomous Region, China. Digital elevation model (DEM) data are employed to refl ect topography, and moderate-resolution imaging spectroradiometer (MODIS) cloud products (Aqua MYD06?L2 and Terra MOD06?L2) are used to estimate sunshine percentage. Based on the terrain (e.g., slope, aspect, and terrain shadowing degree) and the atmospheric conditions (e.g., air molecules, aerosols, moisture, cloud cover, and cloud types), observation data from weather stations are also incorporated into the model. Verifi cation results indicate that the model simulations match reasonably with the observations, with the average relative error of the total daily SD being 2.21%. Further data analysis reveals that the variation of the estimated SD is consistent with that of the maximum possible SD; its spatial variation is so substantial that the estimated SD diff ers signifi cantly between the south-facing and north-facing slopes, and its seasonal variation is also large throughout the year.