| A probe heat flow value of the East China Sea shelf |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： |
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| 关 键 词： | 东海 热流 温度变异 海洋动力学 |
| 收稿时间： | 2004-04-14 |
| 修稿时间： | 2005-10-20 |
A probe heat flow value of the East China Sea shelf |
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| Authors: | Li Guanbao Liu Baohua Li Naisheng |
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| Institution: | (1) First Institute of Oceanography, State Ocean Administration, Qingdao 266061, China;(2) Key Laboratory of Marine Sedimentology & Environmental Geology, SOA, 266061 Qingdao, China;(3) Institute of Oceanology, Chinese Academy of Sciences, 266071 Qingdao, China |
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| Abstract: | Bottom temperature variation (BTV) is a serious problem in determining the thermal gradient and heart flow of the sediments
in shallow seas. The water depth of the East China Sea shelf is mostly below 150m, and the heat flow measurement is strongly
affected by BTV. Following a statistical algorithm, we rechecked the temperature and thermal conductivity data of the cruises
KX90-1 and KX91-1, carried out by a cooperation program of China and Japan, and calculate the heat flow in a site without
long-term temperature record. The calculated heat flow in the site was 58.6±3.6 mW/m2, being just within the range of the drill heat flow value of East China Sea shelf. The inversed amplitude spectrum of BTV
has a peak in frequency of 1/10 per year, and the annual component is also an important part. Comparison with two lakes of
Lake Greifensee and Lac Leman (i.e. Lake Geneva), which are in different water depth, revealed that with increasing water
depth, the peak of amplitude spectrum moved towards low frequency components. The heat flow values calculated in this paper
and from petroleum bore hole in East China Sea shelf are much more close to that in southeast China than in Okinawa Trough.
Supported by the National High Technology R&D Program of China (2004 AA616060) |
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| Keywords: | East China Sea shelf heat flow bottom temperature variation |
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