中文摘要：

对青海高原2012年季节性降雪进行采集.6个采样点集中在青海高原东南部地区,共包括36袋雪样.从分析结果可知,青海高原东南部地区季节性降雪中含有较多的沙尘,滤膜颜色多为土黄色.6个采样点雪中的黑碳浓度为（184±123）ng/g,表层雪的黑碳浓度范围是59~238ng/g,平均值为152ng/g.通过后向轨迹聚类分析知道气流主要来自南亚和青藏高原地区,有少部分是来自塔克拉玛干沙漠和戈壁地区.

英文摘要：

A total of 36 snow samples were collected and analyzed at 6 sites over the southeastern part of Qinghai Plateau. The results showed that the major color of the filters over these sites was yellow, indicating that the seasonal snow contained a large amount of dust. The BC concentration in the seasonal snow was （184±123）ng/g over the 6 sites. In addition, the BC concentration in surface snow ranged from 59ng/g to 238ng/g with an average of 152ng/g. Back trajectory clustering analysis, suggested that the air mass streams were mainly from South Asia and Tibet Plateau, and a small portion was from Taklimakan and Gobi desert.