气候因子对全球洪水的影响及其驱动机制
Impacts of Climatic Indices on Global Flooding and their driving mechanisms
投稿时间:2021-03-07  修订日期:2021-03-07
DOI:
中文关键词:  洪水变化  气候因子  大气环流  驱动机制
英文关键词:Flood change  Climatic index  Atmosphere circulation  Driving mechanism
基金项目:国家自然科学基金(42001042);湖北省自然科学基金(2019CFB221);中国地质大学自主创新启航项目(1910491B14)
作者单位邮编
王诗琳 中国地质大学(武汉) 地理与信息工程学院 地理科学系 430074
刘剑宇 中国地质大学(武汉) 地理与信息工程学院 地理科学系 430074
游元媛 中国地质大学(武汉) 地理与信息工程学院 地理科学系 
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中文摘要:
      气候变化对洪水时空演变具有重要影响。然而,由于全球水文观测数据的缺乏,现有研究集中于区域尺度,难以形成洪水变化与气候因子关系的全球性认识。因此,本文通过整编全球最新实测水文数据集,系统评估全球洪水变化与气候因子的关系及其影响机理。结果表明,气候因子对全球洪水变化具有显著的影响。其中,南方涛动(SOI)对北美、南美以及澳大利亚的洪水影响最为显著,印度洋海温偶极子型震荡(IOD)对欧洲和南美的洪水影响最为显著,欧洲、北美洪水多受大西洋多年代际振荡(AMO)影响,而太平洋年代际振荡(PDO)主要影响南美和欧洲的洪水。气候因子主要通过改变海平面气压和大气环流,对全球洪水产生影响。本文对理解全球洪水变化及其形成机理有重要意义。
英文摘要:
      Flooding is one of the extreme hydrologic events with the most severe socio-economic losses worldwide. Here, we use the newly-issued observed streamflow datasets to examine the response of flood changes to climate indices and their underlying mechanisms. Global assessment indicated that the flood changes are significantly correlated with climate indices. Southern Oscillation Index [SOI] had a significant impact on North and South America as well as Australia, while the Indian Ocean Dipole [IOD] has a significant impact on flooding in Europe and South America. Europe and North America are affected by the Atlantic Multi-decadal Oscillation [AMO], and Pacific Decadal Oscillations [PDO] mainly affects South America and Europe. Moreover, atmospheric circulation, sea surface temperature, and sea level pressure related to the dominant climate index can well explain the relationship between climate index and flood changes. This study clarifies the relationship and its driving mechanism between climate indices and FC, which is of great significance to flood risk management.
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