地理学报 ›› 2000, Vol. 55 ›› Issue (1): 55-65.doi: 10.11821/xb200001006

• 论文 • 上一篇    下一篇

希夏邦马峰冰川粒雪中环境季节变化记录研究

康世昌1, 秦大河1, 姚檀栋1, CameronP.Wake2   

  1. 1. 中国科学院兰州冰川冻土研究所冰芯与寒区环境开放研究实验室,兰州730000;
    2. Climate Change Research Center,Institute for the Study of Earth,Ocean and Space,University of New Hamp shire,Durham,NH03824,USA
  • 收稿日期:1999-03-26 修回日期:1999-07-30 出版日期:2000-01-15 发布日期:2000-01-15
  • 基金资助:
    国家攀登计划项目 (95-预-40 和95-预-24);中国科学院院重大项目 (KZ951-A1-402 和KZ951-A1-2);国家自然科学基金(49871022);中科院兰州冰川冻土研究所与美国俄亥俄州立大学伯德极地研究中心、新罕布什尔大学气候变化研究中心的合作研究项目

Environment Recorder in the Glacier from Mount Xixiabangma

KANG Shi chang1, QIN Da he1, YAO Tan dong1, Cameron P Wake2   

  1. 1. Laboratory of Ice Core and Cold Regions environment, Lanzhou Institute of Glaciology and Geogryology, Chinese Academy of sciences, Lanzhou 730000, PR of China;
    2. Climate Change Research Center,I nstitute f or the Study of Earth,Ocean and Sp ace,University of New Hamp shire,Durham,NH03824,USA
  • Received:1999-03-26 Revised:1999-07-30 Online:2000-01-15 Published:2000-01-15
  • Supported by:
    the Climbing Project of China,No.95-Yu-40 and 95-Y u-24;the Project of Chinese Academy of Sciences,No.KZ951-A1-402 and KZ951-A1-204;the National Nature Science Foundation of China,No.49871022;Cooperative Project between Lanzhou Institute of Glaciology and Geocryology,CAS and Climate Change Research Center,University of New Hampshire,Byed Polar Research Center,Ohio State University,USA

摘要: 在希夏邦马峰达索普冰川海拔7000m 冰雪平台钻取14m 粒雪芯一支。通过对粒雪芯中δ18O和主要离子浓度的季节变化分析,认识希夏邦马峰地区大气环境的季节变化特征。相关分析和经验正交函数(EOF)分析结果表明,达索普粒雪芯内的δ18O与Ca2+、 Mg2+、 SO42-、NO3-和NH4+浓度之间正相关显着,而与Na+ 、Cl- 和K+ 浓度之间的关系不明显。EOF1 代表了以尘埃来源为主的离子变化趋势,EOF2 则代表了海盐离子的变化趋势,EOF3 表明NO3- 和NH4+的次一级变化与Ca2+和 Mg2+具有反相关性,说明除尘埃来源外NO3- 和NH4+还具有其它来源。达索普粒雪芯中δ18O季节变化的“春高夏低”态势表明,在印度夏季风期间,大气降水中较低δ18O 值受 “降水量效应”影响,春季δ18O的高值主要受气温的影响。

关键词: 希夏邦马峰, 达索普冰川, 大气环境, 季节变化

Abstract: The seasonal variations of δ18O values and concentrations of major ions (Ca2+, Mg2+, NH4+, SO42-, NO3-, Na+, Cl- and K +) recorded in the 14 m firn core, which was recovered from the Dasuopu Glacier, are analyzed to understand the characteristics of seasonal variations of atmospheric environment in the Mt.Xixiabangma. The analyses of the correlation and EOF show that δ18O values are evident positive correlation with Ca2+, Mg2+, NH4+, SO42-, and NO3- concentrations, but not relevant with Na+, Cl- and K+concentrations. The variation trends of ion concentration that mainly source is dust in the atmosphere are represented by EOF1. However, the variation trends of sea salt ion concentrations are indicated by EOF2. And EOF3 indicates that the secondary seasonal variations of NH4+ and NO3- are negative correlation with Ca2+ and Mg2+, which probably mean other sources besides dust. “High values in spring and low in summer” of δ18O in the Dasuopu Glacier indicate that the low δ18O values in precipitation in summer monsoon season are controlled by the “amount effect”. However, the high δ18O values in spring are mainly affected by increasing temperature. The seasonal variations of atmospheric dust species recorded in the Dasuopu Glacier are high in spring and low in late summer. High concentrations of dust species (Ca2+, Mg2+ and SO42- ) are due to the import of spring dust storms from the arid and semi-arid desert regions in Asia. The atmospheric environment is clear in late summer in Mt. Xixiabangma region. Seasonal variations of sea salt ions concentrations are not so evident.

Key words: Dasuopu Glacier, present atmospheric environment, seasonal variations

中图分类号: 

  • P343.6