孟加拉湾海表盐度变化特征的卫星遥感应用研究

林新宇; 邱云; 杜岩; 周喜武; 宣莉莉; 许金电

doi:10.3969/j.issn.0253-4193.2016.05.005

孟加拉湾海表盐度变化特征的卫星遥感应用研究

doi: 10.3969/j.issn.0253-4193.2016.05.005

1.
国家海洋局第三海洋研究所, 福建厦门 361005
2.
中国科学院南海海洋研究所热带海洋环境国家重点实验室, 广东广州 510301
3.
国家海洋信息中心, 天津 300171

基金项目: 海洋三所基本科研业务费专项资金项目(海三科2009046);国家自然科学基金项目(41276034,40806014,41306027);热带海洋环境国家重点实验室(中国科学院南海海洋研究所)开放课题(LTO1402);海洋公益性行业科研专项经费项目(201005033-4)。

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出版历程
- 收稿日期: 2015-06-29

Study on the utilization of satellite remote sensing for variation characteristic of sea surface salinity in the Bay of Bengal

1.
Third Institute of Oceanography, State Oceanic Administration, Xiamen 361005, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.
National Marine Data and Information Service, Tianjin 300171, China

摘要

摘要: 本文利用2011年8月至2014年3月Aquarius卫星盐度产品结合Argo等实测盐度资料,探讨了孟加拉湾海表盐度的季节及年际变化特征。结果显示,Aquarius与Argo盐度呈显著线性正相关,总体较Argo盐度值低,偏差为-0.13,其中在孟加拉湾北部海域负偏差值比南部海域更大,分别为-0.28和-0.10。Aquarius卫星与Argo浮标在表层盐度观测深度上的差别是造成此系统偏差的主因。Aquarius盐度资料清晰显示了孟加拉湾海表盐度具有明显的季节变化特征,包括阿拉伯海高盐水的入侵引起湾南部海域盐度的变化以及湾北部淡水羽分布范围的季节性迁移等主要特征。此外,分析还揭示了2011(2012)年春季整个湾内出现异常高盐(低盐)现象。研究表明,2010(2011)年湾北部夏季降雨减少(增加)导致该海域海水盐度偏高(偏低),并通过表层环流向南输运引起次年春季湾内表层盐度出现异常高盐(低盐)现象,春季风应力旋度正(负)距平通过影响盐度垂直混合过程对同期表层盐度异常高盐(低盐)变化也有影响。
- 孟加拉湾 /
- Aquarius卫星 /
- 表层盐度 /
- 环流
Abstract: Sea surface salinity (SSS) from Aquarius during August 2011 and March 2014, together with in situ salinity data (e.g. Argo) are used to explore seasonal and interannual variations of the SSS in the Bay of Bengal. It shows that Aquarius SSS has a significant positive correlation with Argo SSS. The Aquarius SSS is relatively lower than Argo SSS, and there exists a negative bias of -0.13 between these two data. The negative bias is larger in the northern bay than that in the southern bay (-0.28 vs -0.10). The bias mainly comes from the different depth between Aquarius and Argo floats in measuring SSS. Aquarius SSS captures main seasonal variations of the SSS in the bay, such as the intrusion of saltier water from Arabian Sea and seasonal migrations of the freshwater plumes in the northern bay. Besides, the SSS reveals anomalous salting (freshening) in the bay during the spring 2011 (2012). Our results suggest that the reduced (enhanced) precipitation during the summer 2010 (2011) in the northern bay reduced (enhanced) freshening in that region, and the anomalous salting (freshening) water was advected southward by the surface-layer circulation causing anomalous salting (freshening) in the whole bay. Meanwhile, the positive (negative) wind stress curl anomaly also contribute to the anomalous salting (freshening) event during spring 2011 (2012) in the bay via impacting the vertical mixing processes.
- Bay of Bengal /
- Aquarius /
- sea surface salinity /
- ocean circulation

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参考文献(29)

Sengupta D, Bharath Raj G N, Shenoi S S C. Surface freshwater from Bay of Bengal runoff and Indonesian throughflow in the tropical Indian Ocean[J]. Geophysical Research Letters, 2006, 33(22): L22609.

Dube S K, Rao A D, Sinha P C, et al. Implications of climatic variations in the fresh water outflow on the wind-induced circulation of the Bay of Bengal[J]. Atmospheric Environment, 1995, 29(16): 2133-2138.

Vinayachandran P N, Murty V S N, Ramesh Babu V. Observations of barrier layer formation in the Bay of Bengal during summer monsoon[J]. Journal of Geophysical Research: Oceans (1978-2012), 2002, 107(C12): SRF 19-1-SRF 19-9.

Thadathil P, Muraleedharan P M, Rao R R, et al. Observed seasonal variability of barrier layer in the Bay of Bengal[J]. Journal of Geophysical Research: Oceans (1978-2012), 2007, 112(C2):C02009.

Masson S, Luo J J, Madec G, et al. Impact of barrier layer on winter-spring variability of the southeastern Arabian Sea[J]. Geophysical research letters, 2005, 32(7):L07703.

Varkey M J, Murty V S N, Suryanarayana A. Physical oceanography of the Bay of Bengal and Andaman Sea[J]. Oceanography and Marine Biology: An Annual Review, 1996, 34: 1-70.

张玉红,杜岩,徐海明,等.赤道印度洋中部断面东西水交换的季节变化及其区域差异[J]. 海洋学报, 2012, 34(2): 30-38. Zhang Yuhong, Du Yan, Xu Haiming, et al. Seasonal variability of the west-east water mass exchange on the section of central equatorial Indian Ocean and its regional difference[J]. Haiyang Xuebao,2012,34(2):30-38.

Akhil V P, Durand F, Lengaigne M, et al. A modeling study of the processes of surface salinity seasonal cycle in the Bay of Bengal[J]. Journal of Geophysical Research: Oceans, 2014, 119(6): 3926-3947.

Murty V S N, Sarma Y V B, Rao D P, et al. Water characteristics, mixing and circulation in the Bay of Bengal during southwest monsoon[J]. Journal of Marine Research, 1992, 50(2): 207-228.

Wu L J, Wang F, Yuan D L, et al. Evolution of freshwater plumes and salinity fronts in the northern Bay of Bengal[J]. Journal of Geophysical Research: Oceans (1978—2012), 2007,112(C08):C08017.

Vinayachandran P N, Shankar D, Vernekar S, et al. A summer monsoon pump to keep the Bay of Bengal salty[J]. Geophysical Research Letters, 2013, 40(9): 1777-1782.

Zhang Y H, Du Y, Zheng S J, et al. Impact of Indian Ocean Dipole on the salinity budget in the equatorial Indian Ocean[J]. Journal of Geophysical Research: Oceans, 2013, 118(10): 4911-4923.

Subrahmanyam B, Murty V S N, Heffner D M. Sea surface salinity variability in the tropical Indian Ocean[J]. Remote Sensing of Environment, 2011, 115(3): 944-956.

Zeng L L, Timothy Liu W, Xue H J, et al. Freshening in the South China Sea during 2012 revealed by Aquarius and in situ data[J]. Journal of Geophysical Research: Oceans, 2014, 119(12): 8296-8314.

Du Y, Zhang Y H. Satellite and Argo observed surface salinity variations in the tropical Indian Ocean and their association with the Indian Ocean Dipole mode[J]. Journal of Climate, 2015, 28(2): 695-713.

Le Vine D M, Lagerloef G S E, Colomb F R, et al. Aquarius: An instrument to monitor sea surface salinity from space[J]. Geoscience and Remote Sensing, IEEE Transactions on, 2007, 45(7): 2040-2050.

Roemmich D, Gilson J. The 2004—2008 mean and annual cycle of temperature, salinity, and steric height in the global ocean from the Argo Program[J]. Progress in Oceanography, 2009, 82(2): 81-100.

Huffman G J, Bolvin D T, Nelkin E J, et al. The TRMM multisatellite precipitation analysis (TMPA): Quasi-global, multiyear, combined-sensor precipitation estimates at fine scales[J]. Journal of Hydrometeorology, 2007, 8(1): 38-55.

Yu L S, Weller R A. Objectively analyzed air-sea heat fluxes for the global ice-free oceans (1981-2005)[J]. Bulletin of the American Meteorological Society, 2007, 88(4): 527-539.

Oki T, Sud Y C. Design of Total Runoff Integrating Pathways (TRIP)-A global river channel network[J]. Earth interactions, 1998, 2(1): 1-37.

Tang W Q, Yueh S H, Fore A G, et al. Validation of Aquarius sea surface salinity with in situ measurements from Argo floats and moored buoys[J]. Journal of Geophysical Research: Oceans, 2014, 119(9): 6171-6189.

Reagan J, Boyer T, Antonov J, et al. Comparison analysis between Aquarius sea surface salinity and World Ocean Database in situ analyzed sea surface salinity[J]. Journal of Geophysical Research: Oceans, 2014, 119(11): 8122-8140.

Le Vine D M, Lagerloef G S E, Pellerano F, et al. The Aquarius/SAC-D mission and status of the Aquarius instrument[C]//Microwave Radiometry and Remote Sensing of the Environment, 2008. MICRORAD 2008. IEEE, 2008: 1-4.

Ebuchi N, Abe H. Evaluation of sea surface salinity observed by Aquarius[C]//Geoscience and Remote Sensing Symposium (IGARSS), 2014 IEEE International. IEEE, 2014: 4427-4430.

王新新, 杨建洪, 赵冬至, 等. Aquarius/SAC-D卫星盐度数据在中国南海的准确度评估[J]. 热带海洋学报, 2013, 32(5): 23-28. Wang Xinxin, Yang Jianghong, Zhao Dongzhi, et al. Assessment of Aquarius/SAC-D salinity data accuracy in the South China Sea[J]. Journal of Tropical Oceanography,2013,32(5):23-28.

Xuan L L, Qiu Y, Xu J D, et al. Hydrography and circulation in the eastern tropical Indian Ocean during April-May 2011[J]. Atmospheric and Oceanic Science Letters, 2012, 5(4): 284-289.

Dai A, Trenberth K E. Estimates of freshwater discharge from continents: Latitudinal and seasonal variations[J]. Journal of hydrometeorology, 2002, 3(6): 660-687.

Pant V, Girishkumar M S, Udaya Bhaskar T V S, et al. Observed interannual variability of near-surface salinity in the Bay of Bengal[J]. Journal of Geophysical Research: Oceans, 2015,120(5):3315-3329.

邱云,李立. 孟加拉湾上层地转环流周年变化的遥感研究[J]. 海洋学报, 2007, 29(3): 39-46. Qiu Yun, Li Li. Annual variation of geostrophic circulation in the Bay of Bengal observed with TOPEX/Poseidon altimeter data[J]. Haiyang Xuebao, 2007, 29(3): 39-46.

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