Heat flow measurement in shallow seas through long-term temperature monitoring
Heat flow measurement in shallow seas through long-term temperature monitoring
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DOI：
10.1029/2005gl024138
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发表时间：
2005-11-10
影响因子：
5.2
通讯作者：
Goto, S
中科院分区：
文献类型：
--
作者：
Hamamoto, H;Yamano, M;Goto, S
在底层水温不稳定的浅海区，很难获得可靠的热流值。我们试图通过监测沉积物中的温度剖面来测量浅海中的热流，使用具有2米长的温度探头的弹出式仪器。在日本西南部的四个观测站获得了超过200天的长期温度记录。数据分析表明，底层水温变化（BTV）通过沉积物传播的热扩散。我们可以从温度记录中去除BTV的影响，并确定热流，尽管BTV中较长周期分量的影响可能仍然存在。得到的热流值是一致的，从天然气水合物BSR的深度估计在附近的站点。这些结果表明，长期温度监测是一个有用的方法，在浅海热流测定。
It is difficult to obtain reliable heat flow values in shallow sea areas where the bottom water temperature is not stable. We attempted to measure heat flow in shallow seas by monitoring temperature profiles in sediments, using pop-up type instruments with 2 m long temperature probes. Long-term temperature records for over 200 days were obtained at four stations off southwest Japan. Analysis of the data showed the bottom water temperature variations (BTV) were propagated through sediments by thermal diffusion only. We could then remove the influence of BTV from the temperature records and determine the heat flow, though the effect of longer period components in BTV has possibly remained. The obtained heat flow values are consistent with those estimated from depths of gas hydrate BSRs in the vicinities of the stations. These results indicate that long-term temperature monitoring is a useful method for heat flow determination in shallow seas.