Crystal structure, stable isotopes (δ18O), and development of sea ice in the Ross, Amundsen, and Bellingshausen seas, Antarctica
Crystal structure, stable isotopes (δ18O), and development of sea ice in the Ross, Amundsen, and Bellingshausen seas, Antarctica
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南极洲罗斯海、阿蒙森海和别林斯高晋海的晶体结构、稳定同位素 (δ18O) 和海冰的发育
DOI：
10.1029/93jc02057
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发表时间：
1994
影响因子：
--
通讯作者：
H. Krouse
中科院分区：
文献类型：
--
作者：
M. Jeffries;R. Shaw;K. Morris;A.L. Veazey;H. Krouse
对夏末从东罗斯海、阿蒙森海和西别林斯高晋海的浮冰中获得的冰芯的晶体结构和氧同位素组成进行了研究，以确定有助于南大洋东太平洋区海冰形成的冰生长过程和条件。同位素数据表明，适量的降雪有助于海冰的形成。然而，即使结合使用同位素和晶体结构分析也不能明确解释所有雪被夹带在冰中的方式。尽管如此，很明显，大部分雪都包含在粒状雪冰中，这些雪冰是由海水淹没浮冰和雪盖底部而形成的。罗斯-阿蒙森地区的积雪深达 2 米，并由主要由碎冰组成的 7 至 8 米厚的浮冰支撑。别林斯高晋地区的积雪和浮冰比罗斯-阿蒙森地区要薄。别林斯高晋核心主要由多层冰和凝冰组成。此外，在这两个区域的核心都有许多倾斜或倾斜的凝冰块和筏状冰晶层。数据表明，海冰在湍流环境中通过多种机制形成。
The crystal structure and oxygen isotopic composition of ice cores obtained from floes at the end of summer in the eastern Ross Sea, the Amundsen Sea, and the western Bellingshausen Sea were investigated to determine the ice growth processes and conditions that contribute to sea ice development in the eastern Pacific sector of the southern ocean. The isotope data indicate that a moderate amount of snow contributes to the development of the sea ice. However, even the combined use of isotopes and crystal structure analysis does not unambiguously explain the means by which all of the snow is entrained in the ice. Nevertheless, it seems clear that much of the snow is contained in granular snow-ice that results from seawater flooding of floes and the base of the snow cover. The snow cover in the Ross-Amundsen region was as much as 2 m deep and supported by 7- to 8-m-thick floes primarily composed of frazil ice. In the Bellingshausen region the snow cover and the floes were thinner than in the Ross-Amundsen region. The Bellingshausen cores were composed primarily of multiple layers of frazil and congelation ice. In addition, in both regions there were numerous tipped or inclined blocks of congelation ice and layers of rafted nilas in the cores. The data indicate that the sea ice develops by multiple mechanisms in a turbulent environment.