北方农业学报 ›› 2020, Vol. 48 ›› Issue (6): 108-113.doi: 10.12190/j.issn.2096-1197.2020.06.18

• 农业气象·农业信息技术 • 上一篇    下一篇

兴安盟岭南地区干燥度指数变化特征及影响因素研究

尹春艳1, 赵举1, 戚迎龙1, 李彬1, 张宇1, 刘虎2, 刘晓宇1   

  1. 1.内蒙古自治区农牧业科学院,内蒙古 呼和浩特 010031;
    2.水利部牧区水利科学研究所,内蒙古 呼和浩特 010020
  • 收稿日期:2020-09-02 出版日期:2020-12-20 发布日期:2021-02-04
  • 通讯作者: 赵 举(1972—),研究员,博士,主要从事农业生态及栽培耕作技术的研究工作。
  • 作者简介:尹春艳(1983—),助理研究员,硕士,主要从事土壤盐渍化与水肥高效利用的研究工作。
  • 基金资助:
    国家重点研发计划项目(2018YFD0300402);内蒙古自治区科技计划项目(2019GG027)

Study on the variation characteristics and influencing factors of dryness index in Southern Daxing′Anling Mountains in Hinggan League

YIN Chunyan1, ZHAO Ju1, QI Yinglong1, LI Bin1, ZHANY Yu1, LIU Hu2, LIU Xiaoyu1   

  1. 1. Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China;
    2. Institute of Water Resources for Pastoral Area Ministry of Water Resources,Hohhot 010020,China
  • Received:2020-09-02 Online:2020-12-20 Published:2021-02-04

摘要: 【目的】 明确兴安盟岭南地区干燥度指数年际变化特征及其主要气象影响因子,从而准确估算未来当地干旱变化趋势,指导农业生产和农业节水。【方法】 采用距平分析和逐步回归分析等方法评价1973—2018年6个气象要素(日平均最高温度、日平均最低温度、日平均相对湿度、日平均风速、日平均日照时数、降水量)对干燥度指数的影响,分析了不同时间尺度上的干燥度指数变化。【结果】 兴安盟岭南地区年干燥度指数为 1.80~7.02,多年平均值为3.50;干燥度指数最大值出现在2004年,为7.02,次大值出现在2001年,为5.69;最小值出现在1998年,为1.80,次小值出现在1991年,为1.97。通过距平分析,气候倾向率为每10年增加0.1(P<0.01),气候呈变干趋势;在各气候因子对干燥度指数的逐步回归分析中,日最低温度、平均相对湿度、平均风速和降水量构成因素的直接通径系数绝对值的大小依次为降水量>平均相对湿度>平均风速>日最低温度,应用回归方程估测干燥度指数可靠程度总贡献达到了86.31%。【结论】 兴安盟岭南地区1973—2018年有整体变干的趋势,干燥度指数对平均风速最敏感;平均风速减少是引起兴安盟岭南地区干燥度指数变化的最主要气候因子。

关键词: 干燥度指数, 气象因素, 气候变化, 回归分析, 通径分析

Abstract: 【Objective】To clarify the inter-annual variation characteristics of the dryness index in Southern Daxing′Anling Mountains in Hinggan League and its main meteorological influence factors,so as to accurately estimate the future local drought trend,and then guide agricultural production and agricultural water saving.【Methods】Using methods of anomaly analysis and stepwise regression analysis to evaluate the effects of 6 meteorological elements from 1973 to 2018(daily average maximum temperature,daily average minimum temperature,daily average relative humidity,daily average wind speed,daily average sunshine hours,precipitation)on the dryness index,and the change of dryness index on different time scales was also analyzed.【Results】The annual dryness index in Southern Daxing′Anling Mountains in Hinggan League was 1.80-7.02,and the multi-year average was 3.50;the maximum value of the dryness index was 7.02 in 2004,the second one was 5.69 in 2001,the minimum value was 1.80 in 1998,and the second smallest value appeared in 1991,which was 1.97. Through anomaly analysis,the climate tendency rate increased by 0.1 per 10 years(P<0.01),and the climate showed a dry trend. In the stepwise regression analysis of each climatic factor on the dryness index,the absolute values of the direct path coefficients of daily minimum temperature,average relative humidity,average wind speed and precipitation constitute were in the order of precipitation>average relative humidity>average wind speed>daily minimum temperature. The total contribution of the reliability of the dryness index estimated by the regression equation reached 86.31%.【Conclusion】A trend of overall drying from 1973 to 2018 in Southern Daxing′Anling Mountains in Hinggan League,the dryness index was the most sensitive to average wind speed,and the average wind speed decreased was the main meteorological factor causing the change of the dryness index in Southern Daxing′Anling Mountains in Hinggan League.

Key words: Dryness index, Meteorological factors, Climate change, Regression analysis, Path analysis

中图分类号: 

  • S275.3