Understanding Changes in Atmospheric Composition and Climate During the Past 200,000 Years: The Paleo Trace Gas and Aerosol Challenge Workshop; Jena, Germany; Spring, 1999

题目：了解过去20万年大气成分和气候的变化：古微量气体和气溶胶的挑战-研讨会；全球变化科学面临的最突出的挑战之一是了解大气化学成分自然变化的强迫、调节和气候反馈。CO2、N2O、CH4和其他活性微量气体、海洋生物硫化合物和矿物粉尘的变化需要在年代际到几千年的时间尺度上得到了解，才能充分了解最近和未来人为大气化学扰动的后果。该奖项支持美国参与一个国际研讨会，该研讨会旨在解决以下一级现象：冰川CO2浓度低的原因，冰川开始时CO2减少滞后2- 3000年的原因，末次冰川极大期大气粉尘含量增加的原因，以及冰川和全新世期间最重要的CH4源的位置。讲习班将于1999年3月在IGBP的主持下在德国耶拿举行。

AbstractATM-9904140Sahagian, Dork L.University of New HampshireTitle: Understanding Changes in Atmospheric Composition the Climate During the Past 200,000 years: The Paleo Trace Gas and Aerosol Challenge-Workshop; March 3-6, 1999 in Jena, GermanyOne of the most outstanding challenges facing the science of global change is to understand the forcing, regulation and climate feedbacks of the natural variations in the chemical composition of the atmosphere. Variations of CO2, N2O, CH4 and other reactive trace gases, marine biogenic Sulfur compounds, and mineral dust need to be understood on decadal to multi-millennial time scales before the consequences of recent and future anthropogenic perturbations of atmospheric chemistry can be fully understood. This award supports the U.S. participation in an international workshop designed to address such first-order phenomena as: the cause of low glacial CO2 concentrations, the reason for the 2-3,000 years lag in CO2 drawdown at the beginning of glacials, the causes of enhanced atmospheric dust content during the last glacial maximum, and the locations of the most important CH4 sources during the glacial and the Holocene. The workshop will be held in Jena, Germany (March, 1999) under the auspices of the IGBP.