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中国农学通报

中国农学通报 ›› 2015, Vol. 31 ›› Issue (25): 235-240.doi: 10.11924/j.issn.1000-6850.casb15040053

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

1951—2013年河南省降水量时空变化特征

韩 艳,赵国永,江蕾蕾,向 梅,闫军辉,郭雪莲   

  1. 信阳师范学院城市与环境科学学院,信阳师范学院城市与环境科学学院,信阳师范学院城市与环境科学学院,信阳师范学院城市与环境科学学院,信阳师范学院城市与环境科学学院,兰州大学地质科学与矿产资源学院 甘肃省西部矿产资源重点实验室
  • 收稿日期:2015-04-07 修回日期:2015-07-18 接受日期:2015-06-08 出版日期:2015-09-23 发布日期:2015-09-23
  • 通讯作者: 韩 艳
  • 基金资助:
    国家自然科学基金(41202129、41402149)；信阳师范学院博士科研启动基金(0201306)；校青年基金(2013-QN-071)；大学生基金项目(2014- DXS-150)。

Temporal-spatial Variation Characteristic of rainfall in Henan Province During 1951-2013

韩 艳,,,, and   

  • Received:2015-04-07 Revised:2015-07-18 Accepted:2015-06-08 Online:2015-09-23 Published:2015-09-23

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摘要： 本研究选取1951—2013 年河南省18 个观测站月观测降水量数据为研究对象，运用小波分析、Mann-Kendall 线性趋势检验、降水量变率、累积距平等方法，分析河南省降水量及800 mm等降水量线时空演化规律。结果表明：过去63 年，（1）河南省年和四季降水量具有不显著减少趋势，夏季降水量变化控制年降水量变化，发生旱灾的程度高于洪灾；（2）年和四季降水量存在2~3 年、准4.5 年和准6 年的振荡周期，可能与厄尔尼诺/南方涛动有关；（3）年和四季降水量自东南向西北逐渐减少，大部分地区年和四季降水量均具有减少趋势；（4）将800 mm等降水量线作为中国南北方分界线显得单薄，需要寻找更多的代用指标，综合分析南北方分界线具体走向及宽度范围。

关键词: 烤烟, 烤烟, 总糖, 区域特征, 湘西州

Abstract: The data of monthly rainfall, observed from 18 stations of Henan Province during 1951-2013, were selected as the subject for analyzing the temporal-spatial characteristics of Henan rainfall and 800 mm rainfall line, with wavelet analysis, Mann-Kendall test, rainfall variability and cumulative departure methods. The results showed that: (1) the rainfall of annual and four seasons had non-significant decreasing trend in Henan Province, the variations of annual rainfall was primarily controlled by the summer rainfall, the extent of drought was bigger than that of flood; (2) there were typical oscillations with 2-3 a, approximate 4.5 a and 6 a cycles in the annual and seasonal mean precipitation variation, which were possibly relate to the El Nino/Southern Oscillation; (3) the rainfall of annual and four seasons decreased from southeast to northwest, and most areas of Henan Province had a decreasing trend; (4) only regarding the 800 mm rainfall as the separatrix of southern and northern China seemed to be insufficient, more substitute indexes were needed to comprehensively analyze the specific trend and width range.