Characteristics and mechanisms of the intraseasonal variability of sea surface salinity in the southeastern Arabian Sea during 2015–2020

Hui Teng; Yun Qiu; Xinyu Lin; Xiwu Zhou

doi:10.1007/s13131-022-2074-5

Volume 42 Issue 5

May 2023

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Hui Teng, Yun Qiu, Xinyu Lin, Xiwu Zhou. Characteristics and mechanisms of the intraseasonal variability of sea surface salinity in the southeastern Arabian Sea during 2015–2020[J]. Acta Oceanologica Sinica, 2023, 42(5): 25-34. doi: 10.1007/s13131-022-2074-5

Citation:

Hui Teng, Yun Qiu, Xinyu Lin, Xiwu Zhou. Characteristics and mechanisms of the intraseasonal variability of sea surface salinity in the southeastern Arabian Sea during 2015–2020[J]. Acta Oceanologica Sinica, 2023, 42(5): 25-34. doi: 10.1007/s13131-022-2074-5

Citation:

Hui Teng, Yun Qiu, Xinyu Lin, Xiwu Zhou. Characteristics and mechanisms of the intraseasonal variability of sea surface salinity in the southeastern Arabian Sea during 2015–2020[J]. Acta Oceanologica Sinica, 2023, 42(5): 25-34. doi: 10.1007/s13131-022-2074-5

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Characteristics and mechanisms of the intraseasonal variability of sea surface salinity in the southeastern Arabian Sea during 2015–2020

doi: 10.1007/s13131-022-2074-5

Hui Teng¹,
Yun Qiu^{1, 2, 3, 4
,
,},
Xinyu Lin^{1, 4},
Xiwu Zhou^{1, 4}

1.
Third Institute of Oceanography, Ministry of Natural Resources, Xiamen 361005, China
2.
Laboratory for Regional Oceanography and Numerical Modeling, Laoshan Laboratory, Qingdao 266237, China
3.
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519082, China
4.
Fujian Provincial Key Laboratory of Marine Physical and Geological Processes, Xiamen 361005, China

Funds: The National Natural Science Foundation of China under contract No. 42130406; the Scientific Research Foundation of Third Institute of Oceanography, Ministry of Natural Resources under contract Nos 2022027 and 2018030; the Asian Countries Maritime Cooperation Fund under contract No. 99950410; the Global Change and Air-Sea InteractionⅡunder contract No. GASI-04-WLHY-01.

More Information

Corresponding author: Yun Qiu, E-mail: qiuyun@tio.org.cn
Received Date: 2022-04-05
Accepted Date: 2022-05-16

Available Online: 2023-03-20

Publish Date: 2023-05-25

Abstract

Abstract

Based on Soil Moisture Active Passive sea surface salinity (SSS) data from April 2015 to August 2020, combined with Objectively Analyzed Air-Sea Heat Flux and other observational data and Hybrid Coordinate Ocean Model (HYCOM) data, this work explores the characteristics and mechanisms of the intraseasonal variability of SSS in the southeastern Arabian Sea (SEAS). The results show that the intraseasonal variability of SSS in the SEAS is very significant, especially the strongest intraseasonal signal in SSS, which is located along the northeast monsoon current (NMC) path south of the Indian Peninsula. There are remarkable seasonal differences in intraseasonal SSS variability, which is very weak in spring and summer and much stronger in autumn and winter. This strong intraseasonal variability in autumn and winter is closely related to the Madden-Julian Oscillation (MJO) event during this period. The northeast wind anomaly in the Bay of Bengal (BOB) associated with the active MJO phase strengthens the East India Coastal Current and NMC and consequently induces more BOB low-salinity water to enter the SEAS, causing strong SSS fluctuations. In addition, MJO-related precipitation further amplifies the intraseasonal variability of SSS in SEAS. Based on budget analysis of the mixed layer salinity using HYCOM data, it is shown that horizontal salinity advection (especially zonal advection) dominates the intraseasonal variability of mixed layer salinity and that surface freshwater flux has a secondary role.
- southeastern Arabian Sea,
- sea surface salinity,
- intraseasonal variability,
- air-sea interaction

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References(27)

References

Behara A, Vinayachandran P N, Shankar D. 2019. Influence of rainfall over eastern Arabian Sea on its salinity. Journal of Geophysical Research: Oceans, 124(7): 5003–5020. doi: 10.1029/2019JC014999

Da-Allada C Y, Gaillard F, Kolodziejczyk N. 2015. Mixed-layer salinity budget in the tropical Indian Ocean: seasonal cycle based only on observations. Ocean Dynamics, 65(6): 845–857. doi: 10.1007/s10236-015-0837-7

Feng Ming, Hacker P, Lukas R. 1998. Upper ocean heat and salt balances in response to a westerly wind burst in the western equa-torial Pacific during TOGA COARE. Journal of Geophysical Research: Oceans, 103(C5): 10289–10311. doi: 10.1029/97JC03286

Gopalakrishna V V, Johnson Z, Salgaonkar G, et al. 2005. Observed variability of sea surface salinity and thermal inversions in the Lakshadweep Sea during contrast monsoons. Geophysical Research Letters, 32(18): L18605

Horii T, Ueki I, Ando K, et al. 2016. Impact of intraseasonal salinity variations on sea surface temperature in the eastern equatorial Indian Ocean. Journal of Oceanography, 72(2): 313–326. doi: 10.1007/s10872-015-0337-x

Huffman G J, Adler R F, Arkin P, et al. 1997. The Global Precipitation Climatology Project (GPCP) combined precipitation dataset. Bulletin of the American Meteorological Society, 78(1): 5–20. doi: 10.1175/1520-0477(1997)078<0005:TGPCPG>2.0.CO;2

Jayarathna W N D S, Du Yan, Zhang Yuhong, et al. 2018. Seasonal and interannual variability of sea surface salinity in the central north Arabian Sea based on satellite and Argo observations. Journal of Nanjing University of Information Science and Technology (Natural Science Edition), 10(3): 311–323

Kara A B, Rochford P A, Hurlburt H E. 2000. An optimal definition for ocean mixed layer depth. Journal of Geophysical Research: Oceans, 105(C7): 16803–16821. doi: 10.1029/2000JC900072

Li Yuanlong, Han Weiqing, Lee T. 2015. Intraseasonal sea surface salinity variability in the equatorial Indo-Pacific Ocean induced by Madden-Julian oscillations. Journal of Geophysical Research: Oceans, 120(3): 2233–2258. doi: 10.1002/2014JC010647

Li Xin, Yin Ming, Chen Xiong, et al. 2020. Impacts of the tropical Pacific–Indian Ocean associated mode on Madden–Julian oscillation over the maritime continent in boreal winter. Atmosphere, 11(10): 1049. doi: 10.3390/atmos11101049

Matthews A J, Singhruck P, Heywood K J. 2010. Ocean temperature and salinity components of the Madden–Julian oscillation observed by Argo floats. Climate Dynamics, 35(7–8): 1149–1168

Narvekar J, D’Mello J R, Prasanna Kumar S, et al. 2017. Winter-time variability of the eastern Arabian Sea: A comparison between 2003 and 2013. Geophysical Research Letters, 44(12): 6269–6277. doi: 10.1002/2017GL072965

Nyadjro E S, Subrahmanyam B, Murty V S N, et al. 2012. The role of salinity on the dynamics of the Arabian Sea mini warm pool. Journal of Geophysical Research: Oceans, 117(C9): C09002

Prakash S, Mahesh C, Mohan Gairola R. 2012. Observed relationship between surface freshwater flux and salinity in the north Indian Ocean. Atmospheric and Oceanic Science Letters, 5(3): 163–169. doi: 10.1080/16742834.2012.11446984

Price J F, Weller R A, Pinkel R. 1986. Diurnal cycling: Observations and models of the upper ocean response to diurnal heating, cooling, and wind mixing. Journal of Geophysical Research: Oceans, 91(C7): 8411–8427. doi: 10.1029/JC091iC07p08411

Rao R R, Sivakumar R. 2003. Seasonal variability of sea surface salinity and salt budget of the mixed layer of the north Indian Ocean. Journal of Geophysical Research: Oceans, 108(C1): 3009. doi: 10.1029/2001JC000907

Schiller A, Godfrey J S. 2003. Indian Ocean intraseasonal variability in an ocean general circulation model. Journal of Climate, 16(1): 21–39. doi: 10.1175/1520-0442(2003)016<0021:IOIVIA>2.0.CO;2

Schott F A, Xie Shangping, McCreary J P Jr. 2009. Indian Ocean circulation and climate variability. Reviews of Geophysics, 47(1): RG1002

Shankar D, Shetye S R. 1997. On the dynamics of the Lakshadweep high and low in the southeastern Arabian Sea. Journal of Geophysical Research: Oceans, 102(C6): 12551–12562. doi: 10.1029/97JC00465

Sun Qiwei, Du Yan, Zhang Yuhong, et al. 2019. Evolution of sea surface salinity anomalies in the southwestern tropical Indian Ocean during 2010–2011 influenced by a Negative IOD Event. Journal of Geophysical Research: Oceans, 124(5): 3428–3445. doi: 10.1029/2018JC014580

Vinayachandran P N, Kurian J, Neema C P. 2007. Indian Ocean response to anomalous conditions in 2006. Geophysical Research Letters, 34(15): L15602

Wang Lin, Kodera K, Chen Wen. 2012. Observed triggering of tropical convection by a cold surge: implications for MJO initiation. Quarterly Journal of the Royal Meteorological Society, 138(668): 1740–1750. doi: 10.1002/qj.1905

Wang Yanxin, Yang Xiaoyi, Hu Jianyu. 2016. Position variability of the Kuroshio Extension sea surface temperature front. Acta Oceanologica Sinica, 35(7): 30–35. doi: 10.1007/s13131-016-0909-7

Wu Yue, Liu Lin, Zheng Xiaotong. 2020. Influence of El Niño events on sea surface salinity over the central equatorial Indian Ocean. Environmental Research, 182: 109097. doi: 10.1016/j.envres.2019.109097

Wu Yue, Zheng Xiaotong, Sun Qiwei, et al. 2021. Decadal variability of the upper-ocean salinity in the Southeast Indian Ocean: Role of local ocean–atmosphere dynamics. Journal of Climate, 34(19): 7927–7942. doi: 10.1175/JCLI-D-21-0122.1

Xu Jindian, Gao Lu. 2018. The temporal-spatial features of evaporation and precipitation and the effect on sea surface salinity in the tropical Indian Ocean. Haiyang Xuebao (in Chinese), 40(7): 90–102

Zhang Yuhong, Du Yan. 2012. Seasonal variability of salinity budget and water exchange in the northern Indian Ocean from HYCOM assimilation. Chinese Journal of Oceanology and Limnology, 30(6): 1082–1092. doi: 10.1007/s00343-012-1284-7

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