The study of minor constituents in Antarctic ice samples as an environmental indicator.

1)在距海岸线约40 Km的S-25现场采集样品，用离子色谱法测定CL、SO_4、Na、K、NH_4，用高效液相色谱法测定Fe、Al、Cu、Zn。这些样品覆盖了从雪面(1986年2月1日)到50厘米(1985年2月)或近一年的时间。Na和Cl在0-37 cm层呈特征性分布，在0-37 cm层高(分别为800 ppb和450 ppb)，在37-50 cm层低(分别为200 ppb和100 ppb)。Na/Cl值接近0.5，表明海相的形成。它们的特征分布模式表明，在它们的浓度水平上存在着与剧烈变化有关的特定过程。春季NO_3含量最高。2)分别测定了干草金属元素的无机态、有机态和不溶性态。铁、铝、铜和锌的总浓度分别约为300ppt、500ppt、500ppt和100ppt，这些有机重金属化合物存在于南极气溶胶以及陆地和海洋大气中，表明有机重金属化合物普遍存在于全球大气气溶胶中，对它们在南极冰层中的分布研究揭示了全球生物活性或环境条件的历史变化，因为这些有机重金属化合物只能通过生物活性产生。

1)Firn block samples were taken at S-25 site located at ca.40Km inland from shore line and analysed for CL,SO_4,Na,K and NH_4 by IC and Fe,Al,Cu and Zn by HPLC mcthods. These samples cover from snow surface(Feb.1,1986)to 50cm depth (Feb.,1985)or nearly 1 year.Na and Cl show characterstic distribution,high(800ppb and 450ppb, respectively) in 0-37cm layer and low (200ppb and 100ppb, respectively) in 37-50cm layer.The Na/Cl ratio is close to 0.5 and indicats seasalt origine.Their characteristic distribution patern suggests existence of some definit process responsible to the drastic chanfe in their concentration levels. NO_3 shows high peak in the spring.2)Inorganic,organic and insoluble fractions of haeavy metal elements were measured separately. The total concentrations of Fe, Al,Cu and Zn were ca. 300ppt,500ppt,500ppt and 100ppt,respectively with active variation mostly in accordance with that of organic fraction but in contrast with that of major elements.The organic haeavy metals are expected to have some different sources and pass-way other than those of major elements.3)These organic heavy metal compounds have been found in Antarctic aerosol as well as in that on land and maritime air This indicats that the organic heavy metal compounds are prevailing in the global atmospheric aerosol and the study of their distribution in Antarctic ice reveals the historical variation of global biological activity or that of environmental conditions as these organic heavy metal compounds can be produced only through biological activity.