The GISP2 ice core and snow‐atmosphere chemical exchange
The GISP2 ice core and snow‐atmosphere chemical exchange
复制标题
GISP2冰芯和雪-大气化学交换
DOI：
10.1029/91eo00177
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发表时间：
1992
期刊：
影响因子：
--
通讯作者：
A. Neftel
中科院分区：
文献类型：
--
作者：
R. Bales;J. Dibb;A. Neftel
极地冰雪是重建过去气候条件最有价值的工具之一，也许是最有价值的工具。冰川记录了从年内到冰川-间冰期过渡的时间尺度上的巨大变化。冰的变化被认为在很大程度上反映了大气化学和动力学的变化，这些变化是由气候和其他扰动引起的地球化学循环变化造成的[Oeschger和Langway，1989年]。
然而，两大类的过程，空气-雪转移和沉积后的修改，联合收割机结合过滤和潜在的扭曲大气信号之前，他们可以保存在冰川记录[Neftel，1991]。认识到迫切需要了解空气-雪的转移和沉积后的变化，以解开记录在冰芯中的气候信息，国际冰雪委员会（ICSI）成立了一个雪-大气化学交换工作组。在国家科学基金会极地项目部的支持下，ICSI工作组组织了一次研讨会，为3至5年的研究工作制定一项科学计划，重点是交换过程。研讨会将遵循目前格陵兰冰盖项目二（GISP 2）在格陵兰峰会的钻探工作。
Polar snow and ice are among the most valuable, or perhaps are the most valuable, tools for reconstructing past climatic conditions. Glacial-ice records large changes over time scales ranging from intraannual to glacial-interglacial transitions. Changes in the ice are thought to largely reflect changes in atmospheric chemistry and dynamics resulting from variations in biogeochemical cycling due to climatic, and other, perturbations [Oeschger and Langway, 1989].
However, two broad classes of processes, air-to-snow transfer and post-depositional modification, combine to filter and potentially distort atmospheric signals before they can be preserved in the glacial record [Neftel, 1991]. Recognizing the critical need to understand air-snow transfer and postdepositional modifications to unravel the climate information recorded in ice cores, the International Commission on Snow and Ice (ICSI) established a working group on Snow-Atmosphere Chemical Exchange. With support from the National Science Foundation, Division of Polar Programs, the ICSI working group organized a workshop to develop a science plan for a 3- to 5-year research effort focused on exchange processes. The workshop will follow the current Greenland Ice Sheet Project Two (GISP2) drilling effort at Summit, Greenland.