辽宁省农业干旱频发区首场透雨气候特征
Climatic Characteristics of the First Soaking Rain in Agricultural Drought-prone Areas in Liaoning Province
王婉昭 1胡春丽 1梁丰 2李晶 1焦敏 1刘东明 1王阳 1周斌 1王赫然 1黄岩 1王婷1
作者信息
- 1. 辽宁省气象科学研究所，辽宁沈阳110166
- 2. 辽宁省朝阳市气象局，辽宁朝阳122000
- 折叠
摘要
利用1961～2013年辽宁省农业干旱易发区春播期首场透雨出现的日期及首场透雨量资料，采用线性回归、M－K检验法，分析了近53年该区春播期首场透雨出现的日期及首场透雨量的时空分布及气候学变化特征。结果表明，辽宁省农业干旱频发区透雨发生日期较晚，透雨量较少。透雨发生日期和透雨量空间分布均呈东南至北部方向逐渐递减的特征，沿海各站春播期首场透雨量普遍高于内陆地区。区域平均透雨发生日期和透雨量均有年际变化特征，但趋势不明显。各站春播期首场透雨发生日期多呈随时间逐渐提前、透雨量多呈增多趋势，但变化趋势均未通过显著性检验。研究时段内无透雨过程出现的个例占总数的8．4％，内陆及西部各站较沿海及其他地区更易出现春播期无透雨现象。
Abstract
Based on the date and quantity of the first soaking rain in agricultural drought-prone areas in Liaoning Province during 1961-2013,the characteristics of spatial and temporal distribution and climate change in recent 53 years were analyzed by linear regression,M-K test method.The results indicated that the date of the first soaking rain in agricultural drought-prone areas in Liaoning Province appears late and the soaking rainfall quantity is small.The date of the first soaking rain and the soaking rainfall have the same spatial characteristics of decrease from southeast to north.The interdecadal variations of regional average of the date of the first soaking rain and the soaking rainfall are insignificant.The date of the first soaking rain of most weather stations appears earlier and the soaking rainfall is increasing.During the research period,the cases of no soaking rain emergence accounted for 8.4%,no soaking rain in spring sowing period was more easily occurred in inland and western stations than that in coastal and other regions.
关键词
春播期/首场透雨/气候特征/辽宁干旱频发区Key words
Spring sowing season/First soaking rain/Climate characteristic/Drought-prone areas in Liaoning Province引用本文复制引用
出版年
2016
国家科技期刊平台
NSTL
维普
万方数据