期刊
DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
卷 62, 期 -, 页码 40-52出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.dsr.2011.12.012
关键词
Expendable bathythermograph; Depth bias; Temperature bias; Global ocean bathymetry
类别
资金
- Cluster of Excellence 'CliSAP', University of Hamburg [EXC177]
- German Science Foundation (DFG)
A global ocean 30 arc-second gridded GEBCO bathymetry is used as a reference to infer depth biases in expendable bathythermograph (XBT) data. In agreement with earlier studies we diagnose a depth varying XBT depth bias, with XBT sample depth being overestimated within the upper 50-200 m and underestimated below 200 m. The depth bias also exhibits certain time variability, with the fall rate for the majority of the XBT types being slower in the 1970s, with a minimum around 1975-77, again in agreement with earlier studies. However, when applied to the global XBT dataset, the new depth- and time varying depth corrections do not eliminate the total XBT temperature bias relative to the quasi-collocated Conductivity-Temperature-Depth (CTD) and bottle data thus implying the existence of a fall-rate-independent XBT thermal bias. In agreement with earlier works, the largest positive thermal bias is observed before 1980-85. The analysis also suggests different fall-rates for the probes produced by the two main XBT manufacturers. (c) 2012 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据