Coastal environment of the past millennium recorded by a coastal dune in Fujian,China  

作　　者：JIN Jianhui LI Zhizhong JIANG Feng deng tao HU Fan'gen LING Zhiyong 

机构地区：[1]Institute of Geography, Fujian Normal University, Fuzhou 350007, China [2]Fujian Provincial Key Laboratory of Subtropical Resources and Environment, Fuzhou 350007, China [3]Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China [4]Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China

出　　处：《Journal of Arid Land》2016年第5期707-721,共15页干旱区科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (41301012,41271031,U1405231);the Natural Science Foundation of Fujian Province (2013J01153)

摘　　要：Coastal dune is a common aeolian geomorphology in a sandy coast,which records the evolution process of the aeolian landscape system and reflects the complex interaction among land surface,atmosphere and ocean.Coast is a sensitive area to global climate change.Restricted by chronology,most previous researches in China focused only on the cause of formation of coastal dunes.In recent years,the development of optically stimulated luminescence （OSL） dating provides a good method and acts as a carrier for coastal dunes to paleoclimate and paleoenvironmental studies.In this study,we selected an aeolian dune at the Anshan archaeological site,Fujian,China as the research object based on field observations.For determining their sedimentary stages and the primary influencing factors,we used the OSL dating method to construct a chronological framework for the aeolian dune.In addition,the sizes of grains were analyzed for identifying factors influencing the winter monsoon during the Medieval Warm Period （MWP） and the Little Ice Age （LIA） in this area.The results showed that the deposition of the aeolian dune was closely related to variations in the winter monsoon intensity.The changes of the winter monsoon were similar to the tendency of the East Asian winter monsoon,although there were several sub-fluctuations.From an overall perspective,the winter monsoon was strengthened during the MWP （1050–1300） .The results of a power spectrum analysis showed that the intensity of the East Asian winter monsoon is correlated with sunspot activity.Coastal dune is a common aeolian geomorphology in a sandy coast,which records the evolution process of the aeolian landscape system and reflects the complex interaction among land surface,atmosphere and ocean.Coast is a sensitive area to global climate change.Restricted by chronology,most previous researches in China focused only on the cause of formation of coastal dunes.In recent years,the development of optically stimulated luminescence （OSL） dating provides a good method and acts as a carrier for coastal dunes to paleoclimate and paleoenvironmental studies.In this study,we selected an aeolian dune at the Anshan archaeological site,Fujian,China as the research object based on field observations.For determining their sedimentary stages and the primary influencing factors,we used the OSL dating method to construct a chronological framework for the aeolian dune.In addition,the sizes of grains were analyzed for identifying factors influencing the winter monsoon during the Medieval Warm Period （MWP） and the Little Ice Age （LIA） in this area.The results showed that the deposition of the aeolian dune was closely related to variations in the winter monsoon intensity.The changes of the winter monsoon were similar to the tendency of the East Asian winter monsoon,although there were several sub-fluctuations.From an overall perspective,the winter monsoon was strengthened during the MWP （1050–1300） .The results of a power spectrum analysis showed that the intensity of the East Asian winter monsoon is correlated with sunspot activity.

关 键 词：coastal dune Optically Stimulated Luminescence Medieval Warm Period Little Ice Age winter monsoon 

分 类 号：P737.1[天文地球—海洋地质] P425.42[天文地球—海洋科学]