2013年南沙群岛海域温跃层的季节变化及形成机理

田永青; 黄洪辉; 巩秀玉; 余少梅; 靖春生; 高璐

doi:10.3969/j.issn.0253-4193.2017.12.003

2013年南沙群岛海域温跃层的季节变化及形成机理

doi: 10.3969/j.issn.0253-4193.2017.12.003

1.
国家海洋局第三海洋研究所, 福建厦门 361005;中国水产科学研究院南海水产研究所广东省渔业生态环境重点实验室/农业部外海渔业开发重点实验室, 广东广州 510300
2.
中国水产科学研究院南海水产研究所广东省渔业生态环境重点实验室/农业部外海渔业开发重点实验室, 广东广州 510300
3.
国家海洋局第三海洋研究所, 福建厦门 361005

基金项目: 广东省渔业生态环境重点实验室开放基金（LFE-2015-5）；国家重点研发专项（2016YFC1402607）；农业部财政重大专项（NFZX2013）；南海物理海洋与海洋气象科学考察历史资料整编（2017FY201402）；国家海洋局第三海洋研究所基本科研业务费专项资金资助项目（海三科2013035）。

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出版历程
- 收稿日期: 2017-02-03
- 修回日期: 2017-06-30

The seasonal variation of the thermocline and its formation mechanism in the sea area around Nansha Islands in 2013

1.
Third Institude of Oceanography, State Oceanic Administration, Xiamen 361005, China;Guangdong Provincial Key Laboratory of Fishery Ecology and Environment/Key Laboratory of Open-sea Fishery Exploitation, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
2.
Guangdong Provincial Key Laboratory of Fishery Ecology and Environment/Key Laboratory of Open-sea Fishery Exploitation, Ministry of Agriculture, South China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou 510300, China
3.
Third Institude of Oceanography, State Oceanic Administration, Xiamen 361005, China

摘要

摘要: 利用调查数据及遥感数据揭示了2013年南沙群岛海域温跃层的季节变化特征，温跃层上界深度平均值春、夏、冬季基本一致，介于45~47 m之间，秋季最大，达60 m；温跃层厚度平均值夏、秋、冬季基本一致，介于85~87 m之间，春季相对较小，为78 m。温跃层强度平均值春、夏、秋、冬季几乎一致，介于0.13~0.15℃/m之间。调查海域温跃层上界深度季节变化的形成机理为：春季西深东浅的原因是西部受净热通量较小、大风速、负的风应力旋度以及中南半岛东部外海的中尺度暖涡和反气旋环流共同作用，东部近岸海域净热通量高值、风速相对较小及风应力旋度引起的Ekman抽吸效应共同控制；夏季深度分布较均匀的原因是10°N以北风致涡动混合强但受Ekman抽吸影响，10°N以南风致涡动混合弱但风应力旋度为负值；秋季深度较其他季节平均加深15 m的原因是南沙群岛海域被暖涡占据，暖涡引起的反气旋式环流使得温跃层上界深度被海水辐聚下压；冬季正的风应力旋度产生的Ekman抽吸和冷涡引起的气旋式环流共同作用，使得温跃层上界深度较秋季平均抬升15 m。
- 南沙群岛海域 /
- 温跃层 /
- 风应力旋度 /
- Ekman抽吸
Abstract: With the survey and remote sensing data, we revealed the seasonal characteristics of the thermocline in the sea area around Nansha Islands sea area in 2013. Specifically, the mean value of the thermocline upper-bounds depth was almost the same in spring, summer and winter, which was around 45 to 47 m, and it was maximum in autumn which was as deep as 60 m. For the thermocline thickness, in the seasons of summer, autumn and winter it demonstrated almost the same mean value ranging from 85 to 87 m, while a slightly smaller value of 78 m was found in spring. The mean value of the thermocline intensity was almost the same throughout the year from spring to winter, which ranged from 0.13 to 0.15℃/m. The formation mechanism of such seasonal characteristics of thermocline upper-bounds depth was also revealed. In spring, it was deep in the west whereas shallow in the east. This is because that the western area was controlled by relatively low net heat fluxes, high wind speeds and the negative wind stress curl, and it is also influenced simultaneously by the mesoscale warm eddy and the anticyclonic circulation from the coastal area off the eastern Indo-China Peninsula; contrarily, the eastern area was controlled by relatively high net heat fluxes, low wind speed as well as the Ekman pumping effect induced by the wind stress curl. In summer, the depth was almost uniform from west to east. It was because that, in the north of 10°N, the wind-induced vortex mixing, though being strong, was undermined by the Ekman pumping, whereas in the south of 10°N the wind-induced vortex mixing, which although was weak, was affected by the negative wind stress curl. In autumn, the mean depth was 15 m deeper than those in the other three seasons. The reason was that the sea area of Nansha Islands was controlled by a warm eddy which induced the anticyclonic circulation that subsequently deepened the thermocline upper-bounds depth through the convergence of upper layer seawater. When it came to winter, the Ekman pumping induced by the positive wind stress curl and the cyclconic circulation caused by the cold eddy worked together, which lifted up the mean value of the thermocline upper-bounds depth by 15 m compared with that in autumn.
- the Nansha Islands sea area /
- thermocline /
- wind stress curl /
- Ekman pumping

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参考文献(26)

邱章, 黄企洲. 南沙群岛海区温跃层时空分布的分析[G]//南沙群岛海区物理海洋学研究论文集Ⅰ. 北京:海洋出版社, 1994:64-80. Qiu Zhang, Huang Qizhou. The analysis of the thermocline temperal-spatial distribution in the sea area of Nansha Islands[G]//The Journal of Physical Oceanography in the Nansha Islands Ⅰ. Beijing:China Ocean Press, 1994:64-80.

徐锡祯, 邱章, 龙小敏. 南海温跃层基本特征及一维预报模式[J]. 海洋与湖沼, 1993, 24(5):494-502. Xu Xizhen, Qiu Zhang, Long Xiaomin. The radical characteristics and the one-dimensional calculation pattern of the South China Sea thermocline[J]. Oceanologia et Limnologia Sinica, 1993, 24(5):494-502.

何有海, 关翠华, 王盛安, 等. 南海南部热结构和水温的垂直分布[G]//南沙群岛海区物理海洋学研究论文集Ⅰ. 北京:海洋出版社, 1994:167-177. He Youhai, Guan Cuihua, Wang Sheng'an, et al. The heat structure and the vertical distribution of water temperature in the southern South China sea[G]//The Journal of Physical Oceanography in the Nansha Islands Ⅰ. Beijing:China Ocean Press, 1994:167-177.

邱章, 徐锡祯, 龙小敏. 1994年9月南沙群岛调查海区的跃层特征[J]. 热带海洋, 1996, 15(2):61-67. Qiu Zhang, Xu Xizhen, Long Xiaomin. The characteristics of the sea water transition layer in the investigated area of Nansha Islands in Sept.1994[J]. Tropic Oceanology, 1996, 15(2):61-67.

Chen Dake, Busalacchi A J, Rothstein L M. The roles of vertical mixing, solar radiation, and wind stress in a model simulation of the sea surface temperature seasonal cycle in the tropical Pacific Ocean[J]. Journal of Geophysical Research:Oceans, 1994, 99(C10):20345-20359.

Mccreary J P, Kundu P K, Molinari R L. A numerical investigation of dynamics thermodynamics and mixed-layer processes in the Indian Ocean[J]. Progress in Oceanography, 1993, 31(3):181-244.

邱章, 蔡树群. 与南沙深水区温跃层有关的海水平均温度的分布特征[J]. 热带海洋, 2000, 19(4):10-14. Qiu Zhang, Cai Shuqun. Distribution characteristics of mean sea temperature relative to thermocline in deep water of Nansha Islands sea area[J].Tropic Oceanology, 2000, 19(4):10-14.

方文东, 郭忠信, 黄羽庭. 南海南部海区的环流观测研究[J]. 科学通报, 1997, 42(21):2264-2271. Fang Wendong, Guo Zhongxin, Huang Yuting. A study on circulation observation in the southern South China Sea[J]. Chinese Science Bulletin, 1997, 42(21):2264-2271.

蔡树群, 龙小敏, 陈荣裕, 等. 春季南沙群岛海区环流结构的探讨[J]. 热带海洋学报, 2004, 23(2):37-44. Cai Shuqun, Long Xiaomin, Chen Rongyu, et al. A study on circulation structure in spring in Nansha Islands sea area, South China Sea[J]. Journal of Tropical Oceanography, 2004, 23(2):37-44.

Cai Shuqun, Long Xiaomin, Wang Shengan, et al. Spring upper warm water of the Nansha Islands sea area in the South China Sea and the numerical study on its dynamic mechanism[J]. Chinese Science Bulletin, 2006, 51(SⅡ):38-44.

Fang Wendong, Fang Gonghong, Shi Ping, et al. Seasonal structures of upper layer circulation in the southern South China Sea from in situ observations[J]. Journal of Geophysical Research:Oceans, 2002, 107(C11):3202.

Liu Qinyu, Jia Yinglai, Liu Penghui, et al. Seasonal and intraseasonal thermocline variability in the central South China Sea[J]. Geophysical Research Letters, 2001, 28(23):4467-4470.

陈希, 沙文钰, 李妍. 南海北部海区温跃层分布特征及成因的初步分析[J]. 海洋预报, 2001, 8(4):9-17. Chen Xi, Sha Wenyu, Li Yan. The elementary analysis for the distribution character of thermocline in the area of South China Sea[J]. Marine Forecasts, 2001, 8(4):9-17.

周发琇, 丁洁, 于慎余. 南海表层水温的季节内振荡[J]. 青岛海洋大学学报, 1995, 25(1):1-6. Zhou Faxiu, Ding Jie, Yu Shenyu. The inerseasonal oscillation of sea surface temperature in the South China Sea[J]. Journal of Ocean University of Qingdao, 1995, 25(1):1-6.

周发琇, 高荣珍. 南海次表层水温的季节内变化[J]. 科学通报, 2001, 46(21):1831-1837. Zhou Faxiu, Gao Rongzhen. The inerseasonal variation of the subsurface temperature in the South China Sea[J]. Chinese Science Bulletin, 2001, 46(21):1831-1837.

Liu Qingyu, Yang Haijun, Wang Qi. Dynamic characteristics of seasonal thermocline in the deep sea region of the South China Sea[J]. Chinese Journal of Oceanology and Limnology, 2000, 118(2):104-109.

兰健, 鲍颖, 于非, 等. 南海深水海盆环流和温跃层深度的季节变化[J]. 海洋科学进展, 2006, 24(4):436-445. Lan Jian, Bao Ying, Yu Fei, et al. Seasonal variabilities of the circulation and thermocline depth in the South China Sea deep water basin[J]. Advances in Marine Science, 2006, 24(4):436-445.

宋利明, 张禹, 周应祺.印度洋公海温跃层与黄鳍金枪鱼和大眼金枪鱼渔获率的关系[J]. 水产学报, 2008, 32(3):369-378. Song Liming, Zhang Yu, Zhou Yingqi. The relationships between the thermocline and the catch rate of Thunnus albacares and Thunnus obesus in the high seas of the Indian Ocean[J]. Journal of Fisheries of China, 2008, 32(3):369-378.

张义钧, 范文静, 骆敬新, 等. GB/T 12763.7-2007海洋调查规范第7部分:海洋调查资料交换[S]. 北京:中国标准出版社, 2007. Zhang Yijun, Fan Wenjing, Luo Jingxin, et al. GB/T 12763.7-2007 The specifications for oceanographic survey-Part 7:Exchange of oceanographic survey data[S]. Beijing:China Standards Press, 2007.

姜波, 吴新荣, 丁杰, 等.南海温跃层深度计算方法的比较[J]. 海洋通报, 2016, 35(1):64-73. Jiang Bo, Wu Xinrong, Ding Jie, et al. Comparison on the methods of determining the depths of thermocline in the South China Sea[J]. Marine Science Bulletin, 2016, 35(1):64-73.

吴巍, 方欣华, 吴德星, 等. 南海南部海区的障碍层[J]. 科学通报, 2001, 46(7):590-594. Wu Wei, Fang Xinhua, Wu Dexing, et al. The barrier layer in the southern sea area of the South China Sea[J]. Chinese Science Bulletin, 2001, 46(7):590-594.

蒋国荣, 郝少东, 杜涛, 等. 南海北部温跃层逐月变化特征分析[J]. 海洋预报, 2011, 28(3):40-45. Jiang Guorong, Hao Shaodong, Du Tao, et al. Monthly variabilities of the thermocline in the northern South China Sea[J]. Marine Forecasts, 2011, 28(3):40-45.

潘爱军, 刘秦玉. 北太平洋副热带西部模态水形成区海洋涡旋对冬季垂直混合过程的影响[J]. 科学通报, 2005, 50(14):1523-1530. Pan Aijun, Liu Qinyu. The effection of the ocean eddy formed in subtropical western mode water in the North Pacific on the vertical mixing process in winter[J]. Chinese Science Bulletin, 2005, 50(14):1523-1530.

方雪娇, 王彩霞, 徐佳佳. 南海温跃层深度的季节和年际变化特征[J]. 海洋湖沼通报, 2013(3):45-55. Fang Xuejiao, Wang Caixia, Xu Jiajia. Seasonal and interannual variations of the thermocline depth in the South China Sea[J].Transactions of Oceanology and Limnology, 2013(3):45-55.

施平, 杜岩, 王东晓, 等. 南海混合层年循环特征[J]. 热带海洋学报, 2001, 20(1):10-17. Shi Ping, Du Yan, Wang Dongxiao, et al. Annual cycle of mixed layer in South China Sea[J]. Journal of Tropical Oceanography, 2001, 20(1):10-17.

吴日升, 郭小钢, 李立. 1998年冬季南海的海洋水文特征与环流[J]. 海洋学报, 2002, 24(S1):142-153. Wu Risheng, Guo Xiaogang, Li Li. Winter hydrographic condition and circulation of the South China Sea in 1998[J]. Haiyang Xuebao, 2002, 24(S1):142-153.

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