2004 Winter Survey Profiles of Temperature, Salinity, Density and Nutrients [Christensen, J.]

As part of the Shelf-Basin Interactions (SBI) project, early spring sampling was performed in the eastern area of the Shelf-Basin Interactions Project using aircraft. Flights began on 1 April 2004 and finished on 16 April 2004. During this time, we sampled 32 sites on a series of 5 transect lines (Fig. 1). Stations were about 10 km apart along each transect line. Transect lines B, C, and D were at the same spacing; while, lines A and E were 20 km from the nearest transect line. Typically, 4 stations were sampled on each flying day. At each site, a Seabird SBE-19 Conductivity Temperature Depth (CTD) and a water sampling bottle was deployed through an 25 cm hole augered through the pack-ice. Continuous profiles of pressure, temperature, and salinity were made from the ice hole to either the sediment surface or to about 500 m. CTD data were processed with Seabird software (Seasoft) and the data binned into 0.5 dbar layers. Data herein are the vertical profiles of temperature, salinity, and density. About 30 ml of seawater collected from the Niskin bottle were poured into a 50 ml clean dry polyethylene sample bottle. The nutrient sample bottles quickly froze and were kept that way until measurement of nitrate, nitrite, ammonium, phosphate and silicate by the Nutrient Chemistry Laboratory of the Scripps Institute of Oceanography.

作为Shelf-Basin Interactions（大陆架-盆地相互作用，简称SBI）项目的一部分，在春季早期，项目组采用航空方式进行东部区域的采样工作。该次飞行活动自2004年4月1日开始，至4月16日结束。在此期间，项目组沿5条横切线对32个采样点进行了采集（见图1）。每个横切线上的站点间隔大约10公里；其中，横切线B、C和D的间距相同；而横切线A和E则距离最近的横切线约20公里。通常情况下，每天在每条横切线上都会采集4个站点。在每个采样点，通过钻取直径为25厘米的孔洞，将Seabird SBE-19电导率-温度-深度计（CTD）和水样采集瓶投入密集的冰层中。从冰孔至沉积物表面或约500米深处，进行了压力、温度和盐度的连续剖面测量。CTD数据经Seabird软件（Seasoft）处理，并按0.5 dbar层进行数据分组。本数据集包含温度、盐度和密度的垂直剖面数据。从Niskin瓶中收集的约30毫升海水被倒入一个50毫升的清洁干燥聚乙烯样品瓶中。营养样本瓶迅速冻结，并保持冻结状态直至由Scripps海洋研究所的营养化学实验室测量硝酸盐、亚硝酸盐、铵、磷酸盐和硅酸盐。