Investigation of Photochemical Transformations within Snow and their Effect on Snow and Atmospheric Composition

honrath, Richard dibb, jack albert, marymich。shepson, PAUL BLAKE, DONALD ANASTASIO， CORTPURDUE大学加州大学欧文分校（UC-IRVINE） steffan，科罗拉多大学（UNIVERSITY OF colorado） PIs在格陵兰冰盖的顶峰提出了一个实地采样计划，以检查来自太阳的能量对雪中被困的间隙空气中有机化合物化学的影响。研究结果将用于确定空气/雪的化学成分是否随穿透雪的光能波动而随时间变化。这项研究对于开发一种解释过去大气化学历史的冰芯记录的方法至关重要。正在研究的光化学过程可以更准确地解释过去的大气状况，并更好地估计气候变化或人类活动对大气的自然和人为影响。研究结果还将为格陵兰冰盖在现代大气化学中的作用提供证据，这对了解高纬度过程如何影响大气至关重要。

ABSTRACTOPP-9907197 OPP-9907469 OPP-9907330HONRATH, RICHARD DIBB, JACK ALBERT, MARYMICH. TECH. UNIVERSITY UNIVERSITY NH CRRELOPP-9907376 OPP-9907623 OPP-9907434SHEPSON, PAUL BLAKE, DONALD ANASTASIO, CORTPURDUE UNIVERSITY UC-IRVINE UC-DAVISOPP-9907314STEFFAN, CONRADUNIVERSITY OF COLORADOThe PIs propose a field sampling program at the summit of the Greenland ice cap to examine the effects of energy from the sun on the chemistry of organic compounds contained in the interstitial air trapped in snow. The results of the research will be used to determine if the chemistry of the air/snow changes through time in response to fluctuations in light energy penetrating the snow. The study is critical to developing a method for interpreting ice core records for the history of atmospheric chemistry in the past. The photochemical process under study could lead to more accurate interpretations of past atmospheric conditions and provide better estimates of both natural and anthropogenic impacts on the atmosphere from changing climate or human activities. The results of the research will also provide evidence of the role of the Greenland ice sheet on modern atmospheric chemistry that will be critical to understanding how high-latitude processes affect the atmosphere.