Estimates of the Southern Ocean general circulation improved by animal-borne instruments
Estimates of the Southern Ocean general circulation improved by animal-borne instruments
复制标题
通过动物传播的仪器改进了对南大洋大气环流的估计
DOI：
10.1002/2013gl058304
复制
发表时间：
2013
影响因子：
5.2
通讯作者：
Roquet F
中科院分区：
文献类型：
--
作者：
Roquet F
在过去的十年中，数百只海豹在南大洋配备了电导率-温度-深度传感器，用于生物和物理海洋学研究。现在可以使用经过校准的海豹衍生水文数据集，包括超过165,000个剖面。这些水文数据在现有的南大洋观测系统中的价值是通过进行两个状态估计实验来证明的，不同的只是使用或不使用密封数据来约束系统。包括海豹来源的数据，大大修改了对南极环极流内部和南部的地表混合层性质和环流模式的估计。与独立卫星观测的海冰浓度的一致性得到了改善，特别是沿着东南极大陆架。仪器动物有效地缩小了一个关键的观测差距，随着数据精度和空间覆盖率的提高，它们对监测极地气候变率的贡献将继续增加。
Over the last decade, several hundred seals have been equipped with conductivity‐temperature‐depth sensors in the Southern Ocean for both biological and physical oceanographic studies. A calibrated collection of seal‐derived hydrographic data is now available, consisting of more than 165,000 profiles. The value of these hydrographic data within the existing Southern Ocean observing system is demonstrated herein by conducting two state estimation experiments, differing only in the use or not of seal data to constrain the system. Including seal‐derived data substantially modifies the estimated surface mixed‐layer properties and circulation patterns within and south of the Antarctic Circumpolar Current. Agreement with independent satellite observations of sea ice concentration is improved, especially along the East Antarctic shelf. Instrumented animals efficiently reduce a critical observational gap, and their contribution to monitoring polar climate variability will continue to grow as data accuracy and spatial coverage increase.