Revealing Late Holocence Climate Variability in Antarctica from Borehole Paleothermometry

从钻孔古体温测量揭示南极洲晚全新世气候变化

• 批准号: 1142085
• 负责人: Atsuhiro Muto
• 金额: $ 18.51万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-07-01 至 2016-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1142085&HistoricalAwards=false
• 关键词: Revealing; Late; Holocence; Climate; Variability

Alley/1142085This award supports a project to continue the collection and analyses of firn temperature data from three automated firn thermal profiling units deployed in Dronning Maud Land sector of East Antarctica as part of the Norway-US IPY Traverse project between 2007 and 2009. The intellectual merits of this project are as follows: 1) to constrain and improve the parameterization of firn thermal properties (thermal conductivity and specific heat capacity) that are required for the borehole paleothermometry, 2) to study the change in firn temperature since the deployment of thermal profiling units ~5 years ago and derive the surface temperature trend for that time period, and 3) to compare and contrast the surface temperatures and their trends derived from the measured firn temperatures and satellite thermal infrared data for the past three decades. The project also involves acquiring and deploying an automated system to record transient temperatures at multiple depths in the top 16 meters of the shallow borehole at Dome Fuji, to provide useful data and to prepare for the possibility of conducting temperature-logging in the existing deep (3035 m) and shallow (112 m) boreholes at Dome Fuji in the near future. The preparation of the shallow borehole and the installation of the automated system will be carried out by collaborators from the Japanese Antarctic Research Expedition (JARE) in 2012-13 Antarctic field season. The data collected by this automated system will be used to constrain the thermal properties of upper firn layer at Dome Fuji, as well as comparing with data from other sites, increasing the geographic extent of these studies. The broader impacts of the project include presentation of results at scientific conferences and publication of results in peer-reviewed journals. Public outreach will include targeted work with science teachers and middle school students.

Alley/1142085该奖项支持一个项目，继续收集和分析2007年至2009年期间部署在东南极洲德龙宁毛德地部分的三个自动化积雪热剖面装置的积雪温度数据，作为挪威-美国IPY Traverse项目的一部分。该项目的智力价值如下：1）约束和改进积雪热性质的参数化（热导率和比热容），2）研究自5年前部署热剖面仪以来积雪温度的变化，并得出该时间段的地表温度趋势，（3）比较和对比近30年来由实测积雪温度和卫星热红外资料得到的地表温度及其变化趋势。该项目还涉及获取和部署一个自动化系统，以记录Dome Fuji浅钻孔顶部16米多个深度的瞬态温度，提供有用的数据，并为在不久的将来在Dome Fuji现有的深（3035米）和浅（112米）钻孔中进行温度记录的可能性做好准备。浅钻孔的准备和自动化系统的安装将由日本南极研究考察队（JARE）的合作者在2012-13南极实地考察季节进行。该自动化系统收集的数据将用于限制Dome Fuji上部积雪层的热特性，并与其他站点的数据进行比较，增加这些研究的地理范围。该项目更广泛的影响包括在科学会议上介绍成果，并在同行评审的期刊上发表成果。公共宣传将包括与科学教师和中学生进行有针对性的工作。