Carbonyl Sulfide Measurements in the Deep West Antarctic Ice Sheet Divide Ice Core

艾丹/1043780该奖项支持对南极洲西南极冰盖分水岭（WAIS-D）深冰芯中痕量气体羰基硫（COS）的分析。 COS是对流层中最丰富的含硫气体，也是平流层硫酸盐的前体。 它有一个大的陆地COS汇，与大气二氧化碳（CO2）的光合吸收密切相关。 该项目的主要目标是从WAIS-D 06 A冰芯中获得高分辨率的COS全新世记录。 其主要目的是：1）评估COS的自然变率及其大气变率受气候变率影响的程度; 2）研究大气COS和CO2变化之间的关系。 该项目还包括对10，000 - 30，000年BP的COS进行低分辨率采样和分析，涵盖从末次盛冰期到全新世早期的过渡。 这项工作的目标是评估长期尺度上冰芯空气中COS的稳定性，并确定末次盛冰期COS水平以及冰期和间冰期条件之间变化的幅度。这项工作的结果将通过同行审查出版物传播，并将有助于气象组织平流层臭氧评估和气候小组气候评估等环境评估。 该项目将支持一名博士生和欧文市加州大学地球系统科学系的本科生研究员，并将为非研究活跃大学的本科生创造夏季研究机会。

Aydin/1043780This award supports the analysis of the trace gas carbonyl sulfide (COS) in a deep ice core from West Antarctic Ice Sheet Divide (WAIS-D), Antarctica. COS is the most abundant sulfur gas in the troposphere and a precursor of stratospheric sulfate. It has a large terrestrial COS sink that is tightly coupled to the photosynthetic uptake of atmospheric carbon dioxide (CO2). The primary goal of this project is to develop high a resolution Holocene record of COS from the WAIS-D 06A ice core. The main objectives are 1) to assess the natural variability of COS and the extent to which its atmospheric variability was influenced by climate variability, and 2) to examine the relationship between changes in atmospheric COS and CO2. This project also includes low-resolution sampling and analysis of COS from 10,000-30,000 yrs BP, covering the transition from the Last Glacial Maximum into the early Holocene. The goal of this work is to assess the stability of COS in ice core air over long time scales and to establish the COS levels during the last glacial maximum and the magnitude of the change between glacial and interglacial conditions. The results of this work will be disseminated via peer-review publications and will contribute to environmental assessments such as the WMO Stratospheric Ozone Assessment and IPCC Climate Assessment. This project will support a PhD student and undergraduate researcher in the Department of Earth System Science at the University of California, Irvine, and will create summer research opportunities for undergraduates from non-research active Universities.