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讨论了中日东海MASFLEX合作计划中调查的东海及冲绳海槽海水中溶解态10Be浓度水平及垂直剖面的结果。在这个海区影响10Be浓度的因素主要有生物生产力、悬浮颗粒物的再溶解,以及长江水与黑潮水的混合程度。在样品采集期间(夏季和秋季),东海水柱呈分层状态。通常10Be的垂直剖面可以分成三层,即表面混合层、10Be释放层和底层。表层水10Be的浓度从长江口到黑潮逐渐增大,在黑潮的边缘则剧烈增大。10Be的垂直分布表明,在夏季10Be富集在长江口附近和大陆架中部的底层水中,这两个富集海区是分开的,很可能是由大陆沿岸水所隔开。在秋季,10Be在底层水中的富集仅仅出现在东海大陆架的西部。这个现象是和受季风影响的东海海流的变化相一致的。黑潮分支在台湾东北外海向东海南部侵入对10Be的影响要比黑潮主干流本身更加重要显著。由箱式模型所得到的10Be质量平衡计算结果表明,来自黑潮的10Be输入要比长江及大气沉降的输入更为重要。输入东海的10Be大约81%进入到沉积物中,而19%的10Be则通过海流和水交换流出东海。在东海的10Be沉积通量是10Be全球平均大气生产率的5倍左右,因而东海是10Be的一个重要汇集地。
The results of the concentration and vertical profiles of dissolved 10Be in the seawater of the East China Sea and the Okinawa Trough surveyed in the MASFLEX cooperation program of the East China Sea and East China Sea were discussed. In this area, the main factors affecting the concentration of 10Be are biological productivity, resuspension of suspended particulates, and the degree of mixing of Yangtze River water and Kuroshio water. During the sample collection (summer and autumn), the East China Sea was stratified. The vertical profile of 10Be can usually be divided into three layers, namely the surface mixed layer, 10Be release layer and the bottom layer. The concentration of 10Be in the surface water gradually increased from the Changjiang Estuary to the Kuroshio, and sharply increased at the edge of the Kuroshio. The vertical distribution of 10Be shows that in the summer 10Be is enriched in the bottom water near the Yangtze Estuary and in the middle of the continental shelf, the two rich sea areas are separated and probably separated by continental coastal water. In autumn, the enrichment of 10Be in the bottom water occurs only in the western part of the East China Sea shelf. This phenomenon is consistent with the changes of the East China Sea current affected by the monsoon. The impact of the Kuroshio intrusion on 10Be in the offshore of the northeastern Taiwan toward the southern part of the East China Sea is more significant than that of the Kuroshio main stream itself. The 10Be mass balance calculated from the box model shows that the 10Be input from the Kuroshio is more important than the Yangtze and atmospheric subsidence inputs. About 81% of 10Be entering the East China Sea enters the sediment, while 19% of 10Be flows out of the East China Sea by sea currents and water exchanges. The 10Be deposition flux in the East China Sea is about 5 times the global average for 10Be, making the East China Sea an important gathering point for 10Be.