Numerical modelling of the fall-rate behaviour of a free-fall ocean sensor and its validation

自由落体海洋传感器下落率行为的数值模拟及其验证

• 批准号: 23540506
• 负责人: HANAWA Kimio
• 金额: $ 2.91万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23540506/
• 关键词: XBT; 降下速度; 水温計測; 水温; 海洋貯熱量; 海洋温暖化; 貯熱量; 落下速度; 比較実験; CTD; 粘性

This study attempted to quantify and model the impact of variance in probe weight on the fall-rate of XBT (expendable bathythermograph), which has been a major tool for ocean temperature profiling over the last half a century. Based on a series of direct comparisons, the change of fall-rate of T-7, the most popularly-used probe type, caused by a change of 10g in its probe weight is estimated to be about 1%. This is almost equal to the relative weight change. When this is applied to the manufacturers' weight tolerance in their QC, the influence of weight change on the fall-rate is reasonably confined, and the results of this study give some upper limit on the XBT fall-rate bias, which has been a matter of debate over the last decade for the improvement of the historical ocean temperature data archive.

这项研究试图量化和模拟探头重量变化对 XBT（一次性深海温度计）下降率的影响，XBT 是过去半个世纪海洋温度剖面的主要工具。根据一系列直接比较，最常用的探头类型T-7，其探头重量变化10g所引起的跌落率变化估计约为1%。这几乎等于相对重量变化。当这应用于制造商在质量控制中的重量容差时，重量变化对下降率的影响被合理限制，并且本研究的结果给出了 XBT 下降率偏差的一些上限，这在过去十年中一直是历史海洋温度数据档案改进的争论问题。

项目成果

An assessment of the effect of variance in probe weight on the fall-rate of expendable bathythermograph and pure temperature bias

探头重量变化对一次性深海温度计下落率影响的评估和纯温度偏差

• 发表时间: 2011
• 作者: Kizu;S.;and K. Hanawa
• 通讯作者: and K. Hanawa

Impact of difference in probe weight on the fall-rate of XBT

探针重量差异对XBT跌落率的影响

• 发表时间: 2013
• 作者: Kizu;S. and K. Hanawa
• 通讯作者: S. and K. Hanawa

XBTの落下速度の水温依存性と製造年代による違い

XBT 下降速度的水温依赖性以及不同生产年份的差异

• 发表时间: 2012
• 作者: Kizu;S. and K. Hanawa;木津昭一・花輪公雄;木津昭一・花輪公雄;木津昭一・花輪公雄
• 通讯作者: 木津昭一・花輪公雄

The expendable bathythermograph (XBT) - the biases, and their possible causes

一次性深海温度计 (XBT) - 偏差及其可能的原因

• 作者: Kizu;S.
• 通讯作者: S.

Comparison of the fall rate and structure of recent T-7 XBT manufactured by Sippican and TSK

• DOI: 10.5194/os-7-231-2011
• 发表时间: 2010-10
• 期刊: Ocean Science
• 影响因子: 3.2
• 作者: S. Kizu;C. Sukigara;K. Hanawa