A Cooperative Ice Core Paleoclimate Study of Monsoon Variablity as Archived in the Dasuopu Glacier, China

中国大索普冰川季风变化的合作冰芯古气候研究

• 批准号: 9523237
• 负责人: Lonnie Thompson
• 金额: $ 87.79万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-05-01 至 2000-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9523237&HistoricalAwards=false
• 关键词: Cooperative; Ice; Core; Paleoclimate; Study

Abstract ATM-9523237 Thompson, Lonnie G. Ohio State University Title: A Cooperative Ice Core Paleoclimate Study of Monsoon Variability as Archived in the Dasuopu Glacier, China This award supports the retrieval and analysis of ice cores from the tropical Dasuopu glacier located in the south central Himalayas where conventional, long-term climatic data are completely absent. Tropical records are of particular interest as 50% of the global surface lies between 30oN and 30oS and 75% of the Earth's population inhabits these climatically tropical lands. The records from these cores will complement the long histories recovered from Dunde and Guliya ice caps, on the northeastern and northwestern margins of the Qinghai-Tibetan (Q-T) Plateau. Located on the southern margin of the Q-T Plateau the new drilling site lies well within the spatial extent of the monsoon system. Dominance of monsoonal circulation produces distinctly annual cycles in oxygen isotopic ratios and in the deposition of visible dust which permit the reconstruction of high resolution (annual) records of climatic and environmental conditions. Dasuopu is located just north of the Himalayas with annual precipitation about 300 mm water equivalent (H2O eq.). The high elevation of this site ensures that ice temperatures will be well below OoC, hence this glacier may be "polar: in character and is likely to contain a long, well- preserved record. The initial field program includes a complement of geophysical and surface studies designed to determine the suitability of this glacier for the recovery of high resolution, well-preserved ice core records. Studies of the climate of China are plagued by the absence of data from major sections of the (Q-T) Plateau and the surrounding high mountain ranges. The successful retrieval of previous records (Dunde and Guliya) suggest that ice cores from carefully selected ice caps in Asia are excellent archives for climatic and environmental histories. These records are essential to fill one of the major spatial gaps in the Earth's climate history.

摘要ATM-9523237汤普森，朗尼G。 俄亥俄州州立大学题目：合作冰芯季风古气候研究 中国达索普冰川的变化 该奖项支持对位于喜马拉雅山脉中南部的热带达索普冰川的冰芯进行检索和分析，该冰川完全缺乏常规的长期气候数据。 热带记录特别令人感兴趣，因为全球50%的表面位于北纬30度至南纬30度之间，而地球75%的人口居住在这些气候热带地区。 这些冰芯的记录将补充青藏高原东北和西北边缘敦德冰帽和古里雅冰帽的长期历史。 新钻井位于青藏高原南缘，处于季风系统的空间范围内。 季风环流的优势产生明显的氧同位素比值的年度周期，并在沉积的可见尘埃，允许重建高分辨率（年度）记录的气候和环境条件。 达索普位于喜马拉雅山以北，年降水量约为300毫米水当量（H2O eq.）。 这个地点的高海拔确保了冰的温度将远低于0 ℃，因此这个冰川可能是“极地的：在性质上，很可能包含一个长期的，保存完好的记录。 最初的实地项目包括一系列地球物理和地表研究，旨在确定该冰川是否适合恢复高分辨率、保存完好的冰芯记录。 中国的气候研究一直受到缺乏青藏高原及其周围高山主要地段资料的困扰。 对以前记录（敦德和古利亚）的成功检索表明，来自亚洲精心挑选的冰盖的冰芯是气候和环境历史的极好档案。 这些记录对于填补地球气候历史上的一个主要空间空白至关重要。