Subjects: Geosciences >> Atmospheric Sciences submitted time 2023-05-30 Cooperative journals: 《干旱区研究》
Abstract： It is necessary to comprehensively evaluate the influence of various atmospheric environmental parameters on short-duration rainstorm forecasts in the Hedong region of Gansu Province in order to improve the short- duration rainstorm forecast equation and accuracy. Based on precipitation data from the flood season of 2013 to 2018 in the Hedong region of Gansu Province, using the percentile method, the threshold of shortduration rainstorms from June to August in Hedong was calculated. Ninety-two cases of short-duration rainstorms in the Hedong region of Gansu Province were selected based on the threshold of time- to- storm rain. Using ECMWF 0.25°×0.25° reanalysis data to analyze the atmospheric environmental parameters, it was found that the K index, relative humidity of 700 hPa, the atmospheric precipitable amount, and other parameters are good indicators of short-duration rainstorms in the Hedong region of Gansu Province. Based on the method of fuzzy mathematics, considering the significance and moderation, a comprehensive evaluation plan for 28 atmospheric environmental parameters was constructed, and the weights of atmospheric environmental parameters in different periods were obtained. The analysis shows that, when short-duration rainstorms occur in the flood season in the Hedong region of Gansu Province, the weights of atmospheric environmental parameters differ in different
periods. When forecasting a short-duration rainstorm, the weight of atmospheric environmental parameters in the
period in which it is located should be considered, and the parameters with the highest weight ranking should
mainly be considered.
Subjects: Geosciences >> Atmospheric Sciences submitted time 2021-01-07 Cooperative journals: 《干旱区地理》
Abstract： 为了对庆阳市气候资源特征进行分析和评价，指导当地城乡规划建设及旅游业的发展，利 用庆阳市 1981—2018年8个气象观测站逐日气温、降水、风速、相对湿度、日照时数等资料，计算当地气候舒适度的 4 种参数，分析庆阳市气候舒适度时空变化特征，结果表明：庆阳市春季、秋季偏 冷，夏无酷暑，温暖舒适，冬季寒冷，较不舒适；温湿指数、风效指数、穿衣指数年际变化特征显示， 四季气候均有向暖发展的趋势，春季和夏季变化趋势极显著，秋季和冬季变化显著性较弱；综合指 数年际波动大，夏季气候趋于不舒适，其余季节均趋于舒适；气候舒适期年内分布特征显示，5～9 月 为全市气候舒适期，适合开展旅游活动；5 月和 9 月舒适度空间分布的总体特征是西部高，东部低， 6～8 月均为东南部高，西部、北部低；舒适度月变化总体特征为，5 月＞6 月＞9 月＞8 月＞7 月。
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