Impurities in Snow and Ice (ISI) Workshop; Silverton, Colorado; July 15-18, 2009

主要研究者（PI）将于2009年秋季在科罗拉多的西尔弗顿召开冰雪中杂质研讨会（ISI），以解决改善冰雪覆盖中杂质的气候和水文影响的监测、建模和重建的迫切需要。最近的研究表明，冰雪中的灰尘和烟尘对全球的影响被低估了，甚至更糟，在很大程度上没有意识到。最近的出版物表明，高纬度地区煤烟的辐射强迫对观测到的变暖信号有重大影响。除了全球烟尘排放外，世界沙漠地区广泛的土地利用变化导致粉尘排放逐步增加，这反过来又迫使中纬度山区积雪提前一个月消融。随着对冰雪表面杂质沉积变化的影响的突然关注，需要社区的这个重点研讨会，以及那些有兴趣加入社区的人，来确定和辩论我们目前的理解，正式定义术语（i）辐射强迫，（ii）杂质光学特性和（iii）反射率，揭示建模不足，考虑和起草监测和测量协议，并建立一个路线图，导致一个综合的方法来理解在一定范围内的尺度在冰冻圈杂质的空间和时间强迫。这次研讨会将导致成立一个冰雪杂质工作组，该工作组将起草雪中灰尘和烟尘测量的协议，编写EOS会议报告，并计划在未来一年内举行一次协议批准会议。这些活动将使研究雪尘的广大科学家以及从这些研究中受益的科学家，水管理员

The Principal Investigator (PI) will will convene the Impurities in snow and Ice Workshop (ISI) in the fall of 2009 in Silverton, Colorado in order to address the urgent need for improved monitoring, modeling, and reconstructions of the climatic and hydrologic effects of impurities in snow and ice cover. Recent research has suggested that the global effects of dust and soot in snow and ice have been underestimated or worse, largely unrealized. Recent publications reveal that radiative forcing by soot in the high latitudes has had significant impacts on the observed warming signal. In addition to global emissions of soot, widespread land use change in the world's desert regions has resulted in stepwise increases in dust emission that in turn are forcing order one month earlier ablation of mid latitude mountain snow cover. With this sudden focus on the implications of changes in impurity deposition to snow and ice surfaces, this focused workshop of the community, and those interested in joining the community, is needed to identify and debate our current understanding, formalize terminology for (i) radiative forcings, (ii) impurity optical properties and (iii) reflectance, reveal modeling inadequacies, consider and draft monitoring and measurement protocols, and establish a roadmap leading to an integrated approach to understanding the spatial and temporal forcings of impurities in the cryosphere at a range of scales. This workshop will result in the formation of a Snow and Ice Impurities Working Group that will draft protocols for dust and soot measurements in snow, prepare an EOS Meeting Report, and plan a protocol ratification meeting within the coming year. These activities will greatly benefit the broad community of scientists who study dust on snow and those that benefit from such studies, e.g., water managers.