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中国第三次北极科学考察走航路线上空黑碳气溶胶的观测研究

, PP. 60-68

Keywords: 第3次北极考察,黑碳,气溶胶,观测

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Abstract:

2008年7月至9月,中国第3次北极科学考察期间,在走航路线上利用黑碳仪对黄海-日本海-鄂霍次克海-西北太平洋-白令海-楚科奇海-加拿大海盆等海区上的黑碳气溶胶浓度进行连续观测,最北观测位置达85°21.3'N。观测结果显示,北冰洋是全航线黑碳浓度最低的海区,平均浓度为(5.3±3.7)ng/m3;在70°N以北的海区范围内黑碳浓度纬向梯度分布不显著。后向气流轨迹的分析显示,夏季期间环北冰洋陆地向北冰洋的输送作用很弱,是北冰洋海区内大气黑碳浓度较低、变化幅度较小、纬向分布不明显的主要原因。日本海、黄海海区的黑碳浓度比较接近,也是整个航线各海区中最高的。7月份去程期间,这两个海区的黑碳浓度均为140160ng/m3;9月回程期间为400500ng/m3,约为7月份的3倍。对不同海区黑碳浓度差异的分析以及后向气流轨迹的分析均显示,陆源输送是影响海洋大气中黑碳气溶胶浓度的关键因素。

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