...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Geophysical Research. Biogeosciences >Radiocarbon in the Arabian Sea water column: Temporal variations in bomb C-14 inventory since the GEOSECS and CO2 air-sea exchange rates
【24h】

Radiocarbon in the Arabian Sea water column: Temporal variations in bomb C-14 inventory since the GEOSECS and CO2 air-sea exchange rates

机译：阿拉伯海水柱中的放射性碳：自GEOSECS和CO2气-海汇率以来，C-14炸弹清单的时间变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Results of measurements of C-14 in the upper 1500 m water column in 10 stations of the Arabian Sea are presented. The study carried out during 1994-1945, which includes reoccupation of three Geochemical Ocean Sections Study (GEOSECS) stations (1977-1978), provides an opportunity to assess the temporal variations in the distribution and inventory of bomb radiocarbon over a period of similar to 2 decades. The Delta(14)C values of surface waters (5 m) range between 31 and 58 parts per thousand, similar to 20 parts per thousand less than those measured during 1978 at-the three GEOSECS stations. The higher Delta(14)C values measured during the present (as well as GEOSECS) study occur in the southern Arabian Sea, which can be attributed to the influx of low-salinity and high-Delta(14)C waters from the Bay of Bengal. The Delta(14)C in the Persian Gulf Water (PGW) and the Red Sea Water (RSW) are in the range of -34 to -59 parts per thousand and -89 to -113 parts per thousand, respectively, and do not show any significant differences from those measured during the GEOSECS. The bomb C-14 inventories at the three GEOSECS stations during 1977 and 1995 show that at station 417 in the central Arabian Sea it has increased by similar to 30%, whereas at the other two stations, 416 and 418 in the north and south central Arabian Sea, it is nearly the same. In general, the bomb C-14 inventory in the region ranges between 3.5 and 7.7 x10(9) atoms cm(-2). The CO2 air-sea exchange rates, derived from the bomb C-14 inventory, yield values of 7 - 16 mol m(-2) yr(-1). These exchange rates coupled with reported pCO(2) measurements in surface Arabian Sea waters yield CO2 evasion rates in the range of 50-180 Tg-C yr(-1) for the Arabian Sea. [References: 51]
机译：给出了阿拉伯海10个站上1500 m水柱上部C-14的测量结果。 1994-1945年进行的这项研究包括重新占用三个地球化学海洋剖面研究（GEOSECS）站（1977-1978），为评估炸弹放射性碳的分布和库存随时间变化的时间变化提供了机会。 2个十年。地表水（5 m）的Delta（14）C值在千分之31和58之间，与三个1978年GEOSOS站测得的水相比，降低了千分之二十。在当前（以及GEOSECS）研究中测得的较高Delta（14）C值发生在阿拉伯海南部，这可能归因于来自墨西哥湾的低盐度和高Delta（14）C水的涌入。孟加拉。波斯湾水（PGW）和红海水（RSW）中的Delta（14）C分别在-34至-59千分之一和-89至-113千分之范围内显示与GEOSECS期间测得的任何显着差异。 1977年和1995年，三个GEOSECS站点的C-14炸弹清单显示，阿拉伯海中部417站点的炸弹C-14增长了近30％，而中北部和南部中部的另外两个站点416和418阿拉伯海几乎一样。通常，该地区的C-14炸弹库存在3.5到7.7 x10（9）原子cm（-2）之间。从炸弹C-14存量中得出的CO2气-海汇率为7-16 mol m（-2）yr（-1）。这些汇率加上阿拉伯海表层水域中报道的pCO（2）测量值，得出阿拉伯海的CO2逃逸率在50-180 Tg-C yr（-1）范围内。 [参考：51]

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号