海洋生物生产力的气溶胶表征及其在冰芯研究中的意义

自中国青岛到南极中山站共１３个样品粗粒部分Ｓ和Ｃｌ浓度的分析结果表明海洋气溶胶中的非海盐源Ｓ浓度与Ｃｌ浓度的分布是相似的，因而说明Ｓ和Ｃｌ一样都来自海洋并且主要受海洋气溶胶总量的影响。但非海盐硫与Ｃｌ比值的经向变化则与海洋初级生产力的空间分布是一致的，更能反映海洋生物的活动强度。本文计算了南极Ｖｏｓｔｏｋ冰芯中非海盐硫酸根与海盐总量的比值，该比值的变化和冰芯所反映的温度变化是一致的，暖期高于冷期。

MARINE AEROSOLS INDEX FOR BIOLOGICAL PRODUCTIVITY AND SIGNIFICANCE TO ICE CORE STUDY

Marine biological productivity determines the sea surface emitted sulfur which is the second largest contribution to atmospheric sulfur. Aerosols formed by the local sea surface comprise a far larger part to coarse marine aerosols than anthropgenic emission or long-range transportation does. The concentrations of sulfur and chloride in the coarse part of marine aerosols are presented in this paper. The spacial distributions of non seasalt S (nss S) and Cl are closely correlated,which shows that they are of the same origin and that they are influenced by the total aerosol flux from sea surface with the atmosphere. The ratio of nss S to Cl agrees well with the spacial distribution of marine primary productivity and hence can be used as a more accurate index for marine biological activity. Finally,the ratio of non seasalt sulfate to the total seasalt concentration in Vostok ice core is calculated and shows a quite similar trend to that of the temperature. The ratio shows that marine biological activity in the source area of the ice was stronger in warm period than in glacial period.