Carbon and Oxygen Fluxes in the Central Arctic Ocean Based on Samples from the U.S. N. SCICEX 1999 Cruise

基于美国 N. SCICEX 1999 年巡航样本的北冰洋中部的碳和氧通量

• 批准号: 9813656
• 负责人: Raymond Sambrotto
• 金额: $ 24.79万
• 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: 1999-05-01 至 2001-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813656&HistoricalAwards=false
• 关键词: Carbon; Oxygen; Fluxes; Central; Arctic

9813656Sambrotto This 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. SCICEX 99 will be the sixth cruise in this program. The initial SCICEX submarine cruises to the Arctic Ocean have provided a much more detailed view of the geographic distributions of Arctic Ocean properties than has been recorded previously. This project will address the respiration of organic matter in the basins of the Arctic Ocean and the extent to which this carbon is redistributed beneath Arctic ice. The permanent Arctic ice cover profoundly alters biological and chemical conditions. The ice both restricts the light available for the creation of organic matter, as well as prevents much of the respiration signal in surface waters from re-equilibrating with the atmosphere. These unusual conditions create a situation in which the flux of carbon in this basin may be dominated by horizontal processes. Samples obtained from the 1996 cruise of the USS Pogy provided a geographically broad and coherent data set for the major variables in the ocean carbon system: the dissolved inorganic (DIC) and organic (DOC) carbon pools as well as the particulate carbon (PC) pool. In addition, the submarine mapped oxygen distributions in the surface waters of each basin, providing important evidence as to where the respiration of organic matter occurs in the Arctic. The comparison of these variables in the Canada, Makarov, Amundsen and Nansen basins are now underway with fall data from the SCICEX-96 cruise. The sampling program in 1999 will gather analogous information in the late spring months and extend coverage into the waters near the Canadian Archipelago. These measurements will be critical to sort out the importance of locally produced versus advected respiration signals as well as to determine how much of the large amount of organic matter that enters the Arctic from rivers escapes remineralization. Such rates are critical for understanding the Arctic's role in the carbon cycle of the ocean and atmosphere.

9813656 Sambrotto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。SCICEX 99将是该计划的第六次巡航。最初的SCICEX潜艇巡航北冰洋提供了一个更详细的视图比以前记录的北冰洋财产的地理分布。该项目将研究北冰洋盆地中有机物的呼吸作用，以及这种碳在北极冰层下重新分布的程度。北极永久的冰层覆盖深刻地改变了生物和化学条件。冰既限制了有机物产生的光线，也阻止了表面沃茨中的呼吸信号与大气重新平衡。这些不寻常的条件造成了一种情况，在这种情况下，该盆地中的碳通量可能是由水平过程主导的。从1996年波吉号航空母舰巡航中获得的样本为海洋碳系统的主要变量提供了一个地理上广泛和连贯的数据集：溶解无机碳（DIC）和有机碳（DOC）库以及颗粒碳（PC）库。此外，该潜艇绘制了每个盆地表面沃茨的氧气分布图，为北极有机物的呼吸作用发生在何处提供了重要证据。加拿大、马卡罗夫、阿蒙森和南森盆地的这些变量的比较目前正在进行中，与SCICEX-96巡航的秋季数据进行比较。1999年的取样计划将在晚春的几个月里收集类似的信息，并将覆盖范围扩大到加拿大群岛附近的沃茨。这些测量将是至关重要的，以整理出当地产生的呼吸信号与平流呼吸信号的重要性，以及确定有多少从河流进入北极的大量有机物逃脱了同化。这样的速率对于了解北极在海洋和大气碳循环中的作用至关重要。