探针偏角对海底热流测量结果的影响*

doi:10.11978/2015117

Abstract

Abstract: It is well known that probe tilt is one of error sources of seafloor heat flow measurements. And the error can never be neglected when the probe tilt becomes greater. Recently, we found that the probe tilts were more than 10° at over half of the 87 seafloor heat flow measurement stations in the South China Sea and the Indian Ocean, where the probe tilts were recorded simultaneously. Thus, we obtained a quantitative relationship between probe tilt and the errors of thermal gradient and heat flow. Based on this relationship, we learned that the relative error, which is within 2%, can be neglected when the probe tilt is within 10 degrees. But at terrible operation conditions, especially the bad state of the sea, the tilt is perhaps up to 15~20 degrees, the relative error can be up to about 5%, and will increase nonlinearly and swiftly with probe tilt. We suggest that the inclinometer should be attached when we carry out seafloor heat flow measurements. Then, we should make tilt correction for the seafloor thermal gradient and heat flow if possible.

Key words: Seafloor heat flow, Thermal gradient, Probe tilt, Relative error, South China Sea, Indian Ocean

CLC Number:

P716⁺.8

XU Ziying, YANG Xiaoqiu, SHI Xiaobin, ZENG Xin, ZHAO Junfeng, YU Chuanhai. Effects on the results of seafloor heat flow measurements by probe tilt[J].Journal of Tropical Oceanography, 2016, 35(4): 95-101.

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Effects on the results of seafloor heat flow measurements by probe tilt

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