近50年湘鄂双季稻低温冷害变化特征研究(英文)

Study on the Change Character of Double Rice Cold Damage in Hunan and Hubei Province during the Past 50 Years

应用湘鄂两省气象代表站1961～2008年气象资料,采用30年滑动累积统计方法,分析气候变化背景下湘鄂双季稻低温冷害的变化特征。初步分析表明,近50年来,湘鄂轻度春播期低温30年滑动累积日数呈下降趋势,湖北中南部、湖南北部和西部中度春播期低温30年滑动累积日数呈下降趋势,但湖南南部呈上升趋势,湘鄂重度春播期低温30年滑动累积日数呈上升趋势;湘鄂轻度5月低温30年滑动累积日数呈下降趋势,湖北中南部中度5月低温30年滑动累积日数呈上升趋势,湖南北部、湖南南部呈下降趋势,湖南西部变化不显著,湖北中南部、湖南北部、湖南西部重度5月低温30年滑动累积日数呈下降趋势,湖南南部呈上升趋势;湘鄂轻度寒露风30年滑动累积日数呈下降趋势,湖北中南部、湖南北部和湖南西部中度寒露风30年滑动累积日数呈下降趋势,湖南南部呈上升趋势,湖北中南部重度寒露风30年滑动累积日数呈下降趋势,湖南北部和南部未出现,湖南西部呈上升趋势。

Based on the meteorological data of representative meteorological stations in Hunan and Hubei from 1961 to 2008 years,the change character of double rice cold damage under the background of climate change were analyzed adopting 30 years glide accumulation method.The analysis showed that the 30 years sliding cumulative days of mild low-temperature during spring sowing in Hunan and Hubei were decreased in the recent 50 years,as well as the 30 years sliding cumulative days of moderate low-temperature in central south Hubei,northern and western Hunan.However,there was an increase in southern Hunan,so was the 30 years sliding cumulative days of severe low-temperature.The 30 years sliding cumulative days of mild low-temperature in May reduced in Hunan and Hubei.Instead,that of moderate low-temperature in May in central south Hubei was on the rise,and it was opposite in northern and southern Hunan,but there was no obvious change in western Hunan.The 30 years sliding cumulative days of severe low-temperature showed a decreasing tendency in May in central south Hubei,northern and western Hunan,and southern Hunan showed a contrary tendency.The 30 years sliding cumulative days of mild cold dew wind in Hunan and Hubei were decreased,that of moderate cold dew wind in central south Hubei,northern and western Hunan had the same tendency,but there was a contrary tendency in southern Hunan.The 30 years sliding cumulative days of severe cold dew wind was decreased in central south Hubei and increased in western Hunan,without cold dew wind in northern and southern Hunan.