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中国农学通报 ›› 2020, Vol. 36 ›› Issue (26): 83-92.doi: 10.11924/j.issn.1000-6850.casb20190700378

所属专题: 现代农业发展与乡村振兴 农业气象

• 资源·环境·生态·土壤·气象 • 上一篇    下一篇

气候条件对气象干旱与农业干旱耦合关系的影响

范嘉智1,2(), 谭诗琪3, 王丹4, 罗宇1, 张建军5, 耿欢6   

  1. 1中国气象局气象干部培训学院湖南分院,长沙 410125
    2气象防灾减灾湖南省重点实验室,长沙 410118
    3湖南省气象服务中心,长沙 410118
    4南京信息工程大学应用气象学院生态气象环境研究中心,南京 210044
    5湖南省气候中心,长沙 410118
    6国网池州供电公司,安徽池州 247200
  • 收稿日期:2019-07-03 修回日期:2019-09-24 出版日期:2020-09-15 发布日期:2020-09-14
  • 作者简介:范嘉智,男,1992年出生,安徽马鞍山人,工程师,硕士,研究方向:农业气象、生态气象。通信地址:410125 湖南省长沙市芙蓉区远大二路1070号 中国气象局气象干部培训学院湖南分院,Tel:0731-84691896,E-mail:fjz92419@hotmail.com
  • 基金资助:
    中国气象局气象干部培训学院2018年度科研项目“农业气象数据处理实训个例设计与开发”(内2018-015);湖南省气象局短平快科研项目“湖南水稻天气指数保险研究”(XQKJ18B070)

Climate Conditions: Effects on Coupling Relationship Between Meteorological Drought and Agricultural Drought

Fan Jiazhi1,2(), Tan Shiqi3, Wang Dan4, Luo Yu1, Zhang Jianjun5, Geng Huan6   

  1. 1China Meteorological Administration Training Centre Hunan Branch, Changsha 410125
    2Key Laboratory of Hunan Province for Meteorological Disaster Prevention and Mitigation, Changsha 410118
    3Hunan Meteorological Service Center, Changsha 410118
    4International Center for Ecology, Meteorology and Environment, School of Applied Meteorology, Nanjing University of Information Science and Technology, Nanjing 210044
    5Hunan Climate Center, Changsha 410118
    6State Grid Chizhou Power Supply Company, Chizhou Anhui 247200
  • Received:2019-07-03 Revised:2019-09-24 Online:2020-09-15 Published:2020-09-14

摘要:

以多时间尺度SPEI干旱指数代表气象干旱,农业气象观测站观测的多层土壤体积含水量历史数据作为农业干旱的代表因子,在中国东部亚热带季风气候区、中部大陆性季风气候区和西部中温带干旱气候区探究了气象干旱和农业干旱间的耦合关系,并结合时间延迟进行分析。结果显示:中部地区整体相关性最好,西部最差,其中高相关区域在不同气候区有所差异,越干旱的地区与土壤水分更相关的是越长时间尺度的SPEI,西、中、东部站点最优时间尺度分别为9月、6月、4月尺度。土壤表层的降水在一月内即可下渗至50 cm深度并储存在此深度附近,待干旱时补充表层土壤水分。气象干旱和农业干旱均是水分亏缺现象,但是响应时间并不相同,探究其耦合关系对于提升对干旱机理的认识、提高干旱监测水平、助力防旱抗旱具有重要意义。

关键词: 标准化降水及蒸散指数, 土壤体积含水量, Pearson相关系数, 时间序列分析, 实测数据

Abstract:

Based on multi-time scale SPEI representing meteorological drought, and the historical multi-layers soil volumetric water content data from agro-meteorological stations as representative factors for agricultural drought, we explored the coupling relationship between meteorological drought and agricultural drought in subtropical monsoon climate region in eastern China, continental monsoon climate region in central China and moderate temperature arid climate region in western China, and conducted the analysis in combine with time delay as well. The results showed that: the overall correlation in the central region was the best, the worst was in the west, among them, the high correlation region had differences in different climatic regions, the longer time-scale of SPEI was more relevant with soil moisture in drier regions, the optimal time scale in western, central and eastern regions was September, June, April, respectively; precipitation infiltrated from soil surface to 50 cm depth within a month and then stored near that depth, to replenish surface soil moisture in the event of drought. Meteorological drought and agricultural drought are both water shortage phenomena, but the response time is not the same. Exploring the coupling relationship between the two is significant for enhancing the awareness of drought mechanism, as well as improving the ability of drought monitoring and mitigating and preventing drought.

Key words: the standardized precipitation and evapotranspiration index, soil volumetric water content, Pearson correlation coefficient, time series analysis, observed data

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