气候变化背景下信阳茶叶气候资源时空分布特征分析

Analysis on Spat-iotemporal Distribution Characteristics of Xinyang Tea Climate Resources under the Background of Climate Change

基于1961—2020年信阳地区逐日气象观测数据,采用5日滑动平均法、气候倾向率法等,分析信阳地区气候资源及历年开采期的时空分布规律,研究表明:(1)信阳市茶叶生长季内多年平均气温和≥0℃活动积温分别为15.6℃和5195.0℃·d,其气候倾向率分别为0.21℃/10年和70.0℃·d/10年。(2)生长季内平均降水量和相对湿度分别为1089.0 mm和76%,降水量年际差异大。(3)平均日照时数为1902.7 h,气候倾向率为-89.6 h/10年,年际、年代际差异较大,空间上表现为东高西低。(4)平均开采期为87.7 d,年际、年代际差异较大,空间上东早西晚。

Based on the daily meteorological observation data of Xinyang region from 1961 to 2020,using the 5-day moving average method and the climate tendency rate method,the spatiotemporal distribution of climate resources and mining periods over the years in Xinyang region was analyzed.The results showed that:(1)During the tea growing season in Xinyang City,the annual average temperature and active accumulated temperature of≥0℃were 15.6℃and 5195.0℃·d,respectively.The climate tendency rates were 0.21℃/10 years and 70.0℃·d/10 years,respectively.(2)The average precipitation and relative humidity during the growing season are 1089.0 mm and 76%,respectively,with significant interannual differences in precipitation.(3)The average sunshine duration is 1902.7 h,and the climate tendency rate is-89.6 h/10 years.There are significant interannual and interdecadal differences,with a spatial increase in the east and a decrease in the west.(4)The average mining period is 87.7d,with significant interannual and interdecadal differences,with a spatial distribution of early in the east and late in the west.