Seasonal Differences in Air-Snow Chemical Relationships at Summit, Greenland

dibb, jack bales, Roger blake, donalduniversity of nh university of az university of caopp-9813441 opp-9813549albert, Mary kahl, jonathanusacreel university of wiopp-9813462 opp -9813462 davidson, cliff currie，研究人员建议继续进行1997- 1998年冬季开始的大气取样计划，在格陵兰冰盖顶部海拔10600英尺的地方进行试点计划。1997- 1998年的试点项目是在冬季测量大气化学的第一次尝试，也是美国国家科学基金会在冬季条件下支持高峰站科学小组的第一次尝试。试点项目在科学上的成功和从后勤方面吸取的经验教训证明，建议继续进行冬季取样计划是确定控制大气化学向冰芯记录转移的变量的可行方法。大气化学记录与降雪记录的校准将用于确定大气记录如何转化为冰记录。最终目标是利用先前在该地点收集的格陵兰冰盖2号（GISP2）项目冰芯样本来解释过去的大气化学。GISP2冰芯的10万年年度记录将为研究自然和人为原因引起的大气变化记录提供机会。

ABSTRACTOPP-9813312 OPP-9813442 OPP-9813550DIBB, JACK BALES, ROGER BLAKE, DONALDUNIVERSITY OF NH UNIVERSITY OF AZ UNIVERSITY OF CAOPP-9813441 OPP-9813549ALBERT, MARY KAHL, JONATHANUSACREEL UNIVERSITY OF WIOPP-9813462 OPP-9813333DAVIDSON, CLIFF CURRIE, LLOYDCARNEGIE MELLON UNIVERSITY NATIONAL INST. OF SCIENCE AND TECHNOLOGYThe investigators propose to continue an atmospheric sampling program that was initiated in winter 1997-98 with a pilot program at 10,600 feet altitude at the summit of the Greenland Ice Cap. The 1997-98 pilot project was the first attempt to measure atmospheric chemistry during the winter season and the first attempt by NSF to support a science team at the Summit station during winter conditions. The scientific success of the pilot project and the logistics lessons learned prove that the proposed continuation of a winterover sampling program is a viable method for determining the variables that control the transfer of the atmospheric chemistry into the ice core record. The calibration of the atmospheric chemical record with the snowfall record will be used to determine how the atmospheric record is transferred into the ice record. The ultimate goal is to interpret the past atmospheric chemistry using samples of the Greenland Ice Sheet Two (GISP2) project ice core that was collected previously at the site. The100,000 year annual record of the GISP2 ice core will provide the opportunity to examine the record of atmospheric changes from both natural and anthropogenic causes.