226Ra and 228Ra from SHEBA, Polar Star 2000 Expeditions (Excel) [Kadko, D.]

These data are from two different cruises, one the SHEBA cruise with data from 6/27/98 - 10/17/98, and the second a Polar Star Cruise during August of 2000. This dataset contains measurements of the water column activities of the naturally occuring isotopes 226Ra and 228Ra. Because 228Ra (T1/2= 5.77y) is derived through input from shelf sediments, it is an unambiguous marker of water that has been in contact with shelves. Its relative distribution in the shelf and basin water is therefore very valuable in assessing the degree of shelf-basin interaction. These data are in Excel format.

本数据集源自两次独立的科考巡航：其一为1998年6月27日至1998年10月17日开展的SHEBA科考巡航，其二为2000年8月实施的Polar Star科考巡航。本数据集包含天然放射性同位素226Ra（镭-226）与228Ra（镭-228）的水柱活度实测数据。由于228Ra（半衰期T₁/₂=5.77年）由陆架沉积物输入产生，可作为与陆架发生接触的水体的明确示踪剂。因此，该同位素在陆架与海盆水体中的相对分布特征，对评估陆架-海盆相互作用强度具有重要科研价值。本数据集采用Excel格式存储。