北印度洋障碍层厚度气候态和季节变化特征及其成因初步分析

doi:10.11978/2019117

Abstract

Abstract:

Based on the Array for Real-Time Geostrophic Oceanography (Argo) temperature and salinity observations from 2004 to 2018, we studies the spatial and temporal variations of the barrier layer in the Northern Indian Ocean (40°—105°E, 5°S—25°N) by using EOF (Empirical Orthogonal Function) analysis, wavelet analysis and other methods. The results show that barrier layer exists in the eastern Indian Ocean all year round, but the probability of its occurrence in the western Indian Ocean is low. Thick barriers appear mainly in the south-eastern Arabian Sea (67°—75°E, 3°—12°N), Bay of Bengal (82°—93°E, 11°—20°N) and eastern equatorial Indian Ocean (81°—102°E, 4°S—3°N). The thickness of the barrier layer, which is present in the southeast Arabian Sea and Bay of Bengal, exhibits remarkable annual variation with the largest value in winter and the smallest in summer. In the eastern equatorial Indian Ocean, there is a semi-annual cycle, with peaks in summer and winter. Further analysis shows that the thickness of the barrier layer in the Bay of Bengal and eastern equatorial Indian Ocean is mainly affected by the change of isothermal layer depth, while the change of mixed layer depth has little effect on the change of barrier layer thickness. The thickness of the barrier layer in the Arabian Sea is affected by the changes of both isothermal layer depth and mixed layer depth, of which the isothermal layer depth has a greater influence on it.

Key words: Northern Indian Ocean, barrier layer thickness, isothermal layer, mixed layer

CLC Number:

P731.24

LIU Ying, YAN Youfang, LING Zheng. Preliminary analysis on climatological and seasonal variation of barrier layer thickness in the northern Indian Ocean and it’s mechanism[J].Journal of Tropical Oceanography, 2020, 39(5): 98-108.

Figures/Tables 13

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References 26

[1]	马天, 齐义泉, 程旭华, 2019. 赤道东印度洋和孟加拉湾障碍层厚度的季节内和准半年变化[J]. 热带海洋学报, 38(5):18-31.
	MA TIAN, QI YIQUAN, CHENG XUHUA, 2019. Intraseasonal-to-semiannual variability of barrier layer thickness in the eastern equatorial Indian Ocean and Bay of Bengal[J]. Journal of Tropical Oceanography, 38(5):18-31 (in Chinese with English abstract)
[2]	AGARWAL N, SHARMA R, PAREKH A, et al, 2012. Argo observations of barrier layer in the tropical Indian Ocean[J]. Advances in Space Research, 50(5):642-654.
[3]	BALAGURU K, CHANG P, SARAVANAN R, et al, 2012. Ocean barrier layers’ effect on tropical cyclone intensification[J]. Proceedings of the National Academy of Sciences of the United States of America, 109(36):14343-14347. pmid: 22891298
[4]	DELCROIX T, MCPHADEN M J, DESSIER A, et al, 2005. Time and space scales for sea surface salinity in the tropical oceans[J]. Deep Sea Research Part I: Oceanographic Research Papers, 52(5):787-813. doi: 10.1016/j.dsr.2004.11.012
[5]	DURAND F, SHANKAR D, MONTÉGUT C D B, et al, 2007. Modeling the barrier-layer formation in the southeastern Arabian Sea[J]. Journal of Climate, 20(10):2109-2120.
[6]	FELTON C S, SUBRAHMANYAM B, MURTY V S N, et al, 2014. Estimation of the barrier layer thickness in the Indian Ocean using Aquarius Salinity[J]. Journal of Geophysical Research: Oceans, 119(7):4200-4213. doi: 10.1002/2013JC009759
[7]	FOLTZ G R, MCPHADEN M J, 2009. Impact of barrier layer thickness on SST in the central tropical North Atlantic[J]. Journal of Climate, 22(2):285-299. doi: 10.1175/2008JCLI2308.1
[8]	GIRISHKUMAR M S, RAVICHANDRAN M, MCPHADEN M J, et al, 2011. Intraseasonal variability in barrier layer thickness in the south central Bay of Bengal[J]. Journal of Geophysical Research: Oceans, 116(C3):C03009.
[9]	GODFREY S J, LINDSTROM E J, 1989. The heat budget of the equatorial western Pacific surface mixed layer[J]. Journal of Geophysical Research: Oceans, 94(C6):8007-8017.
[10]	JOSEPH P V, 1990. Warm pool over the Indian Ocean and monsoon onset[J]. Tropical Ocean Atmosphere Newsletter, 53:1-5.
[11]	KUMARI A, KUMAR S P, CHAKRABORTY A, 2018. Seasonal and interannual variability in the barrier layer of the Bay of Bengal[J]. Journal of Geophysical Research: Oceans, 123(2):1001-1015.
[12]	LUKAS R, LINDSTROM E, 1991. The mixed layer of the western equatorial Pacific Ocean[J]. Journal of Geophysical Research: Oceans, 96(S01):3343-3357.
[13]	MAES C, PICAUT J, BELAMARI S, 2002. Salinity barrier layer and onset of El Niño in a Pacific coupled model[J]. Geophysical Research Letters, 29(24): 59-1-59-4.
[14]	MAES C, PICAUT J, BELAMARI S, 2005. Importance of the salinity barrier layer for the buildup of El Niño[J]. Journal of Climate, 18(1):104-118.
[15]	MASSON S, DELECLUSE P, BOULANGER J P, et al, 2002. A model study of the seasonal variability and formation mechanisms of the barrier layer in the eastern equatorial Indian Ocean[J]. Journal of Geophysical Research: Oceans, 107(C12): SRF 18-1-SRF 18-20.
[16]	MASSON S, LUO J J, MADEC G, et al, 2005. Impact of barrier layer on winter-spring variability of the southeastern Arabian Sea[J]. Geophysical Research Letters, 32(7):L07703.
[17]	MONTÉGUT C D B, MADEC G, FISCHER A S, et al, 2004. Mixed layer depth over the global ocean: An examination of profile data and a profile-based climatology[J]. Journal of Geophysical Research: Oceans, 109(C12):C12003.
[18]	PAILLER K, BOURLÉS B, GOURIOU Y, 1999. The barrier layer in the western tropical Atlantic Ocean[J]. Geophysical Research Letters, 26(14):2069-2072.
[19]	QIU YUN, CAI WENJU, LI LI, et al, 2012. Argo profiles variability of barrier layer in the tropical Indian Ocean and its relationship with the Indian Ocean Dipole[J]. Geophysical Research Letters, 39(8):L08605.
[20]	QU TANGDONG, MEYERS G, 2005. Seasonal variation of barrier layer in the southeastern tropical Indian Ocean[J]. Journal of Geophysical Research: Oceans, 110(C11):C11003.
[21]	SPRINTALL J, TOMCZAK M, 1992. Evidence of the barrier layer in the surface layer of the tropics[J]. Journal of Geophysical Research: Oceans, 97(C5):7305-7316.
[22]	THADATHIL P, THOPPIL P, RAO R R, et al, 2008. Seasonal variability of the observed barrier layer in the Arabian Sea[J]. Journal of Physical Oceanography, 38(3):624-638.
[23]	VARKEY M J, MURTY V S N, SURYANARAYANA A, 1996. Physical oceanography of the Bay of Bengal and Andaman Sea[J]. Oceanography and Marine Biology, 34:1-70.
[24]	VIALARD J, DELECLUSE P, 1998a. An OGCM study for the TOGA decade. Part I: Role of salinity in the physics of the Western pacific fresh pool[J]. Journal of Physical Oceanography, 28(6):1071-1088.
[25]	VIALARD J, DELECLUSE P, 1998b. An OGCM study for the TOGA decade. Part II: Barrier-layer formation and variability[J]. Journal of Physical Oceanography, 28(6):1089-1106.
[26]	VINAYACHANDRAN P N, MURTY V S N, BABU V R, 2002. Observations of barrier layer formation in the Bay of Bengal during summer monsoon[J]. Journal of Geophysical Research: Oceans, 107(C12): SRF 19-1-SRF 19-9.

区域	等温层	混合层
阿拉伯海东南部	0.63**	-0.32**
孟加拉湾北部	0.94**	0.11
赤道东印度洋	0.64**	-0.13*

Preliminary analysis on climatological and seasonal variation of barrier layer thickness in the northern Indian Ocean and it’s mechanism

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