Long and Medium-Term Research: Cirrus Cloud Studies With a Counterflow Virtual Impactor

长期中期研究：卷云研究， 逆流式虚拟冲击器 该奖项是根据长期和中期研究， 外国卓越中心计划，使美国 科学家和工程师将进行三到十二个月的 在国外被证明卓越的研究中心进行研究。 的 该计划的奖项提供了联合研究的机会， 利用独特或互补的设施、专门知识和 国外的实验条件。 该奖项将支持为期12个月的博士后研究访问 由西奥多L.安德森与约斯特教授合作 斯德哥尔摩大学的Heintzenberg。 逆流虚拟冲击器（CVI）是一种成熟的 用于收集液态水凝物的装置。 与其他云不同 水收集器，CVI应该在卷云中表现同样出色 (ice)云，允许收集微物理数据， 可以帮助解决一些基本问题，比如卷云是否 在温室气体引起的气候变化中起到积极或消极的反馈作用， 气候变暖 该项目的一个关键目标是描述和开发一个 控制大型水凝物收集的方法 CVI。 其他目标包括：（a）改进全面的气候变化脆弱性指数抽样 和分析系统，以降低两者的检测限。 凝结水和水凝物数浓度和（B） 针对低气压卷云环境优化所有仪器。 该奖项的建议提供资金，以支付国际 旅费、12个月的津贴和家属津贴。

Long & Medium-Term Research: Cirrus Cloud Studies with a Counterflow Virtual Impactor This award is under the Long and Medium-Term Research at Foreign Centers of Excellence Program, which enables U.S. scientists and engineers to conduct three to twelve months of research abroad at research centers of proven excellence. The program's awards provide opportunities for joint research, and the use of unique or complementary facilities, expertise and experimental conditions abroad. This award will support an twelve-month postdoctoral research visit by Dr. Theodore L. Anderson to work with Professor Jost Heintzenberg of Stockholm University. The Counterflow Virtual Impactor (CVI) is a well-established device for collecting liquid hydrometeors. Unlike other cloud water collectors, the CVI should perform equally well in cirrus (ice) clouds, allowing microphysical data to be collected which could help to resolve such fundamental questions as whether cirrus act as a positive or negative feedback in greenhouse-gas-induced climatic warming. A key goal of this project will be to characterize and develop a method of controlling the collection of large hydrometeors by the CVI. Other goals include (a) improving the overall CVI sampling and analysis system so as to lower the detection limits for both condensed water and hydrometeor number concentration and (b) optimizing all instruments for the low pressure cirrus environment. The award recommendation provides funds to cover international travel, a stipend for twelve months and a dependents' allowance.