| 小冰期时中国南方地区降水模式的差异研究 |
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| 引用本文： | 肖思雅,李廷勇,陈朝军,黄冉,王涛,吴尧,徐玉珍,邱海英,黄洋阳,李俊云.小冰期时中国南方地区降水模式的差异研究[J].地质论评,2021,67(1):56-67. |
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| 作者姓名： | 肖思雅 李廷勇 陈朝军 黄冉 王涛 吴尧 徐玉珍 邱海英 黄洋阳 李俊云 |
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| 作者单位： | 1)西南大学地理科学学院岩溶环境重庆市重点实验室，重庆，400715;2)自然资源部/广西岩溶动力学重点实验室，中国地质科学院岩溶地质研究所，广西桂林，541004;1)西南大学地理科学学院岩溶环境重庆市重点实验室，重庆，400715;3)云南省高原地理过程与环境变化重点实验室，云南师范大学地理学部，昆明,650500 |
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| 基金项目： | 本文为广西岩溶动力学重大科技创新基地开放课题资助项目(编号：KDL & Guangxi 202003)，国家自然科学基金资助项目(编号：41772170, 42011530078)和中央高校基本科研业务费专项资金(编号： XDJK2017A010, XDJK2020D005)的成果 |
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| 摘 要： | 小冰期是过去一千年中全球气候变化的重要事件之一。关于小冰期时中国季风区和西风影响区气候变化的对比研究众多,但是缺乏中国南方地区降水模式时空差异的研究,难以了解中国南方地区降水变化规律。为了系统地了解小冰期时中国南方地区降水的复杂性,本文将中国南方地区划分为东南—华南沿海地区、中部地区以及西南地区三个区域,总共选取了19条高分辨率的古气候记录进行对比研究,主要有以下几点认识:(1)相对于中世纪暖期而言,小冰期期间中国南方东南—华南沿海地区的气候偏湿,这可能与雨带在中国南方的滞留时间延长和沿海地区受台风的影响增强有关。(2)中国中部地区秦岭南麓和神农架高山林区在小冰期时期主要呈"冷湿"的模式,差异在于秦岭南麓区域主要在小冰期中后期偏湿,这与中部其他区域偏"冷干"的模式不同。这种区域差异可能是由于地形地势和大气环流的复杂性导致。(3)中国西南地区受印度夏季风和东亚夏季风的共同影响,且该区域地形复杂,其气候变化在小冰期时期存在更加明显的空间差异,没有呈现出比较一致的降水模式。与小冰期期间的降水变化不同的是,近30年东南—华南沿海地区除了台湾和雷州半岛,其他区域降水明显减少,可能受气温和人类活动等因素的影响。通过结合高分辨率的古气候记录,我们系统分析了中国南方小冰期的干湿模式在时空上的差异及其可能的影响因子,这对于认识小冰期时中国南方不同区域降水的复杂性及未来旱涝灾害的防控具有一定意义。
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| 关 键 词： | 小冰期 中国南方地区 降水模式 古气候记录 |
| 收稿时间： | 2020/2/1 0:00:00 |
| 修稿时间： | 2020/10/27 0:00:00 |
Pattern of precipitation changes in southern China during the Little Ice Age |
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| XIAO Siy,LI Tingyong,CHEN Chaojun,HUANG Ran,WANG Tao,WU Yao,XU Yuzhen,QIU Haiying,HUANG Yangyang,LI Junyun.Pattern of precipitation changes in southern China during the Little Ice Age[J].Geological Review,2021,67(1):56-67. |
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| Authors: | XIAO Siy LI Tingyong CHEN Chaojun HUANG Ran WANG Tao WU Yao XU Yuzhen QIU Haiying HUANG Yangyang LI Junyun |
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| Institution: | (Chongqing Key Laboratory of Karst Environment,School of Geographical Sciences,Southwest University,Chongqing,400715;Key Laboratory of Karst Dynainics,MNR&Guangxi,Institute of Karst Geology,CAGS,Guilin,Guangxi,541004;Yunnan Key Laboratory of Plateau Geographical Processes and Environmental Change,Fdculty of Geography,Yunnan Normal University,Kunming,650500) |
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| Abstract: | The Little Ice Age(LIA)is one of the most distinct events of global climate change in the past millennium.There are many comparative studies on the climate change between monsoon-and westerly-dominated regions in China during the LIA,but there is a lack of research on the spatiotemporal differences of climate change in southern China.It makes difficulty to understand the regularity of precipitation changes in southern China during the LIA.In order to comprehensively and systematically understand the complexity of regional precipitation in southern China during the LIA,we divide southern China into three regions,namely the coastal region of southeast—south China,the central region and the southwest region.A total of 19 high-resolution paleoclimate records are selected for comparative study,mainly including the following points:①Compared to the Medieval Warm Period,the coastal region of southeast—south China mainly shows a"cold—wet"pattern over the LIA,which may be related to the prolonged residence time of rain belt in southern China and the enhanced influence of typhoon on coastal region.②Over the mid—late LIA,the south flank of the Qinling Mountains and the alpine forest region of Shennongjia mainly showed a"cold—wet"pattern,of which the difference is that the southern flank of the Qinling Mountains was wet over the mid—late LIA.However,other areas in Central region were characterized by a"cold—dry"pattern.Such regional differences may be caused by the complexity of topography and atmospheric circulation.③Affected by Indian summer monsoon,East Asian summer monsoon and complex terrain,the climate change in southwest China experienced discrepancy during the LIA,without presenting a relatively consistent and typical climate pattern.Different from the precipitation changes during the LIA,the precipitation changes in the coastal region of southeast—south China decreased significantly in the past 30 years,except for the Taiwan and Leizhou peninsula,which may be affected by factors such as temperature and human activities.Based on the high-resolution paleoclimate records,we systematically analyzed the spatial and temporal differences of the Drought/Wet patterns and their possible influencing factors of the LIA in southern China.It is of great significance to understand the complexity of precipitation in different regions of southern China during the LIA,contributing to prevent and control the drought/flood disasters in the future as well. |
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| Keywords: | The Little Ice Age southern China precipitation patterns paleoclimate records |
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