SCICEX 98 and 99: Tracer Studies of the Large Scale Circulation of the Upper and Intermediate Waters in the Canadian Basin

SCICEX 98 和 99：加拿大盆地上层和中层水域大规模环流示踪研究

• 批准号: 9813539
• 负责人: Peter Schlosser
• 金额: $ 16.26万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-04-15 至 2002-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813539&HistoricalAwards=false
• 关键词: SCICEX; 98; 99; Tracer; Studies

ABSTRACT9813539SchlosserThis project is part of the SCICEX program, which makes use of U.S. Navy nuclear submarines as a research platform. This is a joint science program between the Arctic Natural Sciences Program, the Office of Naval Research and the operational Navy. This project will analyze samples collected on the SCICEX 98 cruise and will collect and analyze samples from the upcoming SCICEX 99 cruise. The scientific goal is to map the distribution, pathways, and mean residence times of the surface and halocline waters of the Arctic Ocean by means of a number of chemical tracers. This information is important for our understanding of the shelf/basin exchange, the freshwater distribution and circulation, the impact of freshwater on the stability of the stratification of the upper waters, and the possible effect of variability in the freshwater exportfrom the Arctic on deep-water formation in the Greenland, Iceland, Norwegian (GIN) and Labrador seas. Additionally, these data contribute to filling the gaps in the tracer database used for model calibration. The new data will be combined with tracer data sets from previous SCICEX and icebreaker cruises and interpreted in terms of the goals of this project outlined above. This project will provide new results from the Arctic Ocean on the surface water circulation and freshwater balance.During the SCICEX 98 cruise the team collected 64 oxygen isotope, 64 tritium, 64 helium isotope, and 64 chloroflurocarbon (CFC) samples at 4 surface stations. During SCICEX 99, the science team will collect 10 samples per spiral station for oxygen isotopes, helium isotopes and tritium at a total of 24 spirals stations. The ten samples include 8 depth levels plus 2 replicates. A new sampling method will be applied for CFCs (there were problems with CFC contaminationusing the flame sealing method in the interior of the submarine during the 97 cruise). The samples will be collected and stored in copper tubes. Using this new method, 50 CFC samples will be collected at 5 of the spiral stations. Additionally, about 200 underway oxygen isotopesamples will be collected. For both the SCICEX 98 and 99 cruises a total of 304 tritium, 304 helium isotope, 114 CFC, and 500 oxygen isotope samples will be analyzed.

该项目是SCICEX计划的一部分，该计划利用美国海军核潜艇作为研究平台。这是北极自然科学计划、海军研究办公室和作战海军之间的联合科学计划。该项目将分析在SCICEX 98巡航中收集的样本，并将收集和分析即将到来的SCICEX 99巡航中的样本。科学目标是通过一些化学示踪剂绘制北冰洋表面和盐跃层沃茨的分布、路径和平均停留时间。这一信息对于我们了解大陆架/海盆交换、淡水分布和循环、淡水对上层沃茨分层稳定性的影响以及北极淡水输出的变化对格陵兰海、冰岛海、挪威海和拉布拉多海深水形成的可能影响都很重要。此外，这些数据有助于填补用于模型校准的示踪剂数据库中的空白。新的数据将与以前的SCICEX和破冰船巡航的示踪剂数据集相结合，并根据上述项目的目标进行解释。该项目将提供北冰洋表层水循环和淡水平衡的新结果。在SCICEX 98巡航期间，该小组在4个表层站收集了64个氧同位素、64个氚、64个氦同位素和64个氯氟化碳（CFC）样品。在SCICEX 99期间，科学队将在总共24个螺旋站中每个螺旋站收集10个氧同位素、氦同位素和氚的样品。10个样本包括8个深度水平和2个重复样本。 将对氟氯化碳采用一种新的取样方法（97年巡航期间在潜艇内部使用火焰密封法时存在氟氯化碳污染问题）。将收集样本并储存在铜管中。使用这种新方法，将在5个螺旋站点收集50个氟氯化碳样本。此外，还将收集大约200个航行中的氧同位素样品。对于SCICEX 98和99巡航，总共将分析304个氚、304个氦同位素、114个CFC和500个氧同位素样品。