Circumpolar Active Layer Monitoring (CALM) Workshop

全球气候变化有可能对永久冻土区的自然系统和人类系统产生严重影响。环极活动层监测（CALM）项目关注的是在几十年的时间尺度上观测活动层和近地表永久冻土对气候变化的响应，是两个主要的国际永久冻土观测网之一。现在，在第一个十年的末期，CALM网络整合了100多个站点，涉及来自两个半球15个调查国家的实地科学家。本项目将举办一个研讨会，旨在分析从观测网络获得的丰富数据库，评估气候变化情景下活动层模型的应用，审查现有的CALM分析方法和协议，讨论未来的数据格式、提交和存档协议，审查CALM与其他国际项目的关系，讨论在2003年7月的国际多年冻土会议上的作用，以及CALM项目的未来。由于活动层厚度的广泛而系统的变化可能对寒冷地区的温室气体通量和人类基础设施产生深远影响，因此优化观测和分析程序至关重要。拟议中的研讨会将把永冻土科学家与密切相关领域的工作人员聚集在一起，他们中的许多人具有不同但互补的技能。对来自CALM主要站点的数据进行彻底检查，将允许对网络及其组成部分的整体性能进行评估。研讨会还将促进观察策略和抽样设计有效性的评估。

Global climate change has the potential to produce serious impacts on natural and human systems in permafrost regions. The Circumpolar Active Layer Monitoring (CALM) program is concerned with observing the response of the active layer and near-surface permafrost to climate change at multi-decade timescales, and is one of two major international observation networks devoted to permafrost. Nowat the end of its first decade, the CALM network incorporates more than 100 sites involving field scientists from 15 investigating countries in both hemispheres. This project will conduct a workshop designed to analyze the rich database obtained from the observational network, evaluate active-layer models forapplication under climate-change scenarios, review existing CALM analytical methodologies and protocols, discuss future data formatting, submission, and archive protocols, review the relation of CALM to other international programs, discuss the role of CALM at the International Permafrost Conference in July 2003, and the future of the CALM program. Because widespread, systematic changes in the thickness of the active layer could have profound effects on the flux of greenhouse gases and on the human infrastructure in cold regions, it is critical that observation and analysis procedures be optimized. The proposed workshop will bring together permafrost scientists with workers in closely related areas, many of whom have divergent but complementary skills. A thorough examination of data from the major CALM sites will permit assessment of the overall performance of the network and its components. Theworkshop will also facilitate evaluation of the effectiveness of observation strategies andsampling designs.