| 摘要: |
| 利用渤海中部两点一年中4个季节泥温观测资料，近似确定两侧点海底恒温层泥温分别为11.0℃和11.7℃．认为泥温随深度变化可视为一垂向波-泥温波，并利用这一概念分析了泥温相位随深度变化特征，8#，A（B）平台测点泥温波波长分别为ls=8 m和lA(B)=10 m。研究建议，以0.5m处多年泥温平均值作为海底恒温层温度。 |
| 关键词: 泥温 恒温深度 相位 热扩散率 泥温波 |
| DOI： |
| 分类号: |
| 基金项目:中国海洋石油开发工程设计公司“海上温湿观测及研究”项目资助 |
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| SOIL-TEMPERATURE AT THE DEPTH WITH CONSTANT TEMPERATURE AND PHASE CHARACTERISTICS OF SOIL TEMPERATURE PROFILE IN CEN'TRAL BOHAI SEA |
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Liu Wentong1, Xu Delun1, Wang Zhenglin1, Song Shan2, Wu Shuli2
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1.Physical Oceanography Lab.,Ocean Unirersity of Qingdao, Qingdao 266003;2.Bohai Petroleum Company, Tanggu 300450
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| Abstract: |
| In situ data measured in the representative months (Jan., Apr. - May, Aug., Oct. - Nov.) and the thermal conduction equation were used to calculate the soil depth with constant temperature (DCT) for two sites in the central part of the Bohai Sea. 'The calculated DCT was about 8 m at site 8# and 10 m at site A(B) with the DCT criterion being that the annual variation of soil temperature is equal to or less than 0.1°C. In the light of the results and with those on terrestrial soil temperature as reference, it is proposed that the multi-year averaged soil temperature at 0.5 m below the sea-bed could be taken as the temperature at the DCT, being 11.0°C and 11.7°C at the two sites, respectively.
The calculated results also show that the soil temperature variation with depth can be considered to be a vertical wave-soil temperature wave, with its wave length equaling the length of the soil layer with varying temperature, i.e, the length from the sea-bed surface to the DCT, 8 m at site 8# and 10 m at site A(B). At the depth of half wave-length, the phase of the soil temperature is opposite to that at the sea-bed surface. In summer, the soil temperature is maximum at the sea-bed surface and minimum at the depth of half wave-length; the situation is contrary in winter. |
| Key words: Soil temperature, Soil depth with constant temperature (DCT), Phase, Thermal dispersion rate, Soil temperature wave |
