ADEARTH

Advances in Earth Science >

2022 , Vol. 37 >Issue 1: 80 - 86

DOI: https://doi.org/10.11867/j.issn.1001-8166.2021.113

The Ocean Wave Bridge Linking the Circulation in the Tropical Eastern Indian Ocean

  • Gengxin CHEN
Expand
  • 1.State Key Laboratory of Tropical Oceanography，South China Sea Institute of Oceanology，Chinese Academy of Sciences，Guangzhou 510301，China
    2.Southern Marine Science and Engineering Guangdong Laboratory （Guangzhou），Guangzhou 511458，China
    3.Innovation Academy of South China Sea Ecology and Environmental Engineering，Chinese Academy of Sciences，Guangzhou 510075，China
CHEN Gengxin (1984-), male, Guangzhou City, Guangdong Province, Professor. Research areas include dynamics of ocean circulations. E-mail: chengengxin@scsio.ac.cn

Received date: 2021-09-30

  Revised date: 2021-11-14

  Online published: 2022-01-29

Supported by

the National Natural Science Foundation of China "Physical oceanography"(41822602);"Intraseasonal variability of currents in the tropical Eastern Indian Ocean: characteristics and causes"(41976016)

Fold

Abstract

A large-scale hydrological observational network has been maintained in the tropical Indian Ocean since 2010 by the South China Sea Institute of Oceanography， Chinese Academy of Sciences （CAS）. This paper reviews the research progress on the circulation dynamics over recent years based on the CAS observations. The results reveal an "ocean wave bridge in the eastern boundary". On the equator， the currents in the upper layer， the thermocline， and the middle layer are significantly modulated by the equatorial Kelvin and Rossby waves directly forced by equatorial winds and reflected from the eastern boundary， which effectively transport energy horizontally and vertically. Off the equator， the currents are still regulated by the equatorial dynamics， as equatorial-origin wave signals transmit energy there relying on the eastern boundary in the form of coastal Kelvin waves and reflected Rossby waves. Under the support of the dynamic fulcrum of the eastern boundary， the ocean wave bridge is thus an energy belt， which links generation and variation of the circulation in the tropical eastern Indian Ocean. In addition to the internal factor， contributions of external factors such as large-scale climate mode on the circulation are also discussed. The dynamic framework of ocean wave bridge will provide scientific enlightenment for further research on the characteristics， changes， and effects of the tropical Indian Ocean circulation.

Key words： Indian Ocean; Circulation; Kelvin wave; Rossby wave; Equatorial dynamics

Cite this article

Gengxin CHEN . The Ocean Wave Bridge Linking the Circulation in the Tropical Eastern Indian Ocean[J]. Advances in Earth Science, 2022 , 37(1) : 80 -86 . DOI: 10.11867/j.issn.1001-8166.2021.113

References

1 SCHOTT F A， MCCREARY Jr J P. The monsoon circulation of the Indian Ocean［J］. Progress in Oceanography， 2001， 51（1）： 1-123.
2 CHEN G， WANG Q， CHU X. Accelerated spread of Fukushima's waste water by ocean circulation［J］. The Innovation， 2021， 2（2）： 100119.
3 SCHOTT F A， XIE S P， MCCREARY J P. Indian Ocean circulation and climate variability［J］. Reviews of Geophysics， 2009， 47. DOI：10. 1029/2007 RG 000245.
4 ZHOU Z Q， XIE S P， ZHANG R. Historic Yangtze flooding of 2020 tied to extreme Indian Ocean conditions［J］. Proceedings of the National Academy of Sciences， 2021， 118（12）.DOI： 10.1073/pnas.202255118.
5 MCPHADEN M J， MEYERS G， ANDO K， et al. RAMA： the research moored array for African-Asian-Australian monsoon analysis and prediction［J］. Bulletin of the American Meteorological Society， 2009， 90（4）： 459-480.
6 DU Y， ZHANG Y， ZHANG L Y， et al. Thermocline warming induced extreme Indian Ocean Dipole in 2019［J］. Geophysical Research Letters， 2020， 47（18）： e2020GL090079.
7 YU W， XIANG B， LIU L， et al. Understanding the origins of interannual thermocline variations in the tropical Indian Ocean［J］. Geophysical Research Letters， 2005， 32（24）. DOI： 10.1029/200GL024327.
8 YUAN D， LIU H. Long-wave dynamics of sea level variations during Indian Ocean dipole events［J］. Journal of Physical Oceanography， 2009， 39（5）： 1 115-1 132.
9 MADDEN R A， JULIAN P R. Detection of a 40-50 day oscillation in the zonal wind in the tropical Pacific［J］. Journal of Atmospheric Sciences， 1971， 28（5）： 702-708.
10 HENDON H H， GLICK J. Intraseasonal air-sea interaction in the tropical Indian and Pacific Oceans［J］. Journal of Climate， 1997， 10（4）： 647-661.
11 SHINODA T， HENDON H H. Mixed layer modeling of intraseasonal variability in the tropical western Pacific and Indian Oceans［J］. Journal of Climate， 1998， 11（10）： 2 668-2 685.
12 DUAN Y， LIU H， YU W， et al. The onset of the Indonesian-Australian summer monsoon triggered by the first-branch eastward-propagating Madden-Julian oscillation［J］. Journal of Climate， 2019， 32（17）： 5 453-5 470.
13 MASUMOTO Y， HASE H， KURODA Y， et al. Intraseasonal variability in the upper layer currents observed in the eastern equatorial Indian Ocean［J］. Geophysical Research Letters， 2005， 32（2）. DOI： 10.1029/2004GL021896.
14 ISKANDAR I， TOZUKA T， SASAKI H， et al. Intraseasonal variations of surface and subsurface currents off Java as simulated in a high‐resolution ocean general circulation model［J］. Journal of Geophysical Research： Oceans， 2006， 111（C12）. DOI： 10.1029/2006jc003486.
15 YUAN D， HAN W. Roles of equatorial waves and western boundary reflection in the seasonal circulation of the equatorial Indian Ocean［J］. Journal of Physical Oceanography， 2006， 36（5）： 930-944.
16 HAN W， LAWRENCE D M， WEBSTER P J. Dynamical response of equatorial Indian Ocean to intraseasonal winds： zonal flow［J］. Geophysical Research Letters， 2001， 28（22）： 4 215-4 218.
17 QIU Y， LI L， YU W. Behavior of the Wyrtki Jet observed with surface drifting buoys and satellite altimeter［J］. Geophysical Research Letters， 2009， 36（18）. DOI： 10.1029/2009gl039120.
18 ZENG L， CHEN G， HUANG K， et al. A decade of eastern Tropical Indian Ocean Observation Network （TIOON）［J］. Bulletin of the American Meteorological Society， 2021. DOI： 10.1175/BAMS-D-19-02324.1.
19 CHEN G， LI Y， XIE Q， et al. Origins of eddy kinetic energy in the Bay of Bengal［J］. Journal of Geophysical Research： Oceans， 2018， 123（3）： 2 097-2 115.
20 ZHONG Q， CHEN G， LI Y， et al. Intraseasonal variability of the surface zonal current in the equatorial Indian Ocean： seasonal differences and causes［J］. Acta Oceanologica Sinica， 2021. DOI： 10.1007/S13131-021-1935-7.
21 CHEN G， HAN W， LI Y， et al. Seasonal-to-interannual time-scale dynamics of the equatorial undercurrent in the Indian Ocean［J］. Journal of Physical Oceanography， 2015， 45（6）： 1 532-1 553.
22 CHEN G， HAN W， LI Y， et al. Intraseasonal variability of the equatorial undercurrent in the Indian Ocean［J］. Journal of Physical Oceanography， 2019， 49（1）： 85-101.
23 HUANG K， HAN W， WANG D， et al. Features of the equatorial intermediate current associated with basin resonance in the Indian Ocean［J］. Journal of Physical Oceanography， 2018， 48（6）： 1 333-1 347.
24 HAN W， MCCREARY J P， MASUMOTO Y， et al. Basin resonances in the equatorial Indian Ocean［J］. Journal of Physical Oceanography， 2011， 41（6）： 1 252-1 270.
25 CHEN G， HAN W， ZHANG X， et al. Determination of spatiotemporal variability of the Indian Equatorial Intermediate Current［J］. Journal of Physical Oceanography， 2020， 50（11）： 3 095-3 108.
26 CHEN G， HAN W， LI Y， et al. Intraseasonal variability of upwelling in the equatorial Eastern Indian Ocean［J］. Journal of Geophysical Research： Oceans， 2015， 120（11）： 7 598-7 615.
27 CHEN G， HAN W， LI Y， et al. Interannual variability of equatorial Eastern Indian Ocean upwelling： local versus remote forcing［J］. Journal of Physical Oceanography， 2016， 46（3）： 789-807.
28 CHEN G， HAN W， SHU Y， et al. The role of equatorial under current in sustaining the Eastern Indian Ocean upwelling［J］. Geophysical Research Letters， 2016， 43（12）： 6 444-6 451.
29 CHEN G， HAN W， LI Y， et al. Strong intraseasonal variability of meridional currents near 5° N in the Eastern Indian Ocean： characteristics and causes［J］. Journal of Physical Oceanography， 2017， 47（5）： 979-998.
30 HUANG K， WANG D， HAN W， et al. Semiannual variability of middepth zonal currents along 5° N in the Eastern Indian Ocean： characteristics and causes［J］. Journal of Physical Oceanography， 2019， 49（10）： 2 715-2 729.
31 CHEN G， WANG D， HOU Y. The features and interannual variability mechanism of mesoscale eddies in the Bay of Bengal［J］. Continental Shelf Research， 2012， 47： 178-185.
32 CHENG X， MCCREARY J P， QIU B， et al. Dynamics of eddy generation in the central Bay of Bengal［J］. Journal of Geophysical Research： Oceans， 2018， 123（9）： 6 861-6 875.
33 HUANG K， WANG D， FENG M， et al. Baroclinic characteristics and energetics of annual Rossby waves in the southern tropical Indian Ocean［J］. Journal of Physical Oceanography， 2020， 50（9）： 2 591-2 607.
34 FENG M， WIJFFELS S. Intraseasonal variability in the South Equatorial Current of the East Indian Ocean［J］. Journal of Physical Oceanography， 2002， 32（1）： 265-277.
35 CHEN G， WANG D， HAN W， et al. The extreme El Ni?o events suppressing the intraseasonal variability in the eastern tropical Indian Ocean［J］. Journal of Physical Oceanography， 2020， 50（8）： 2 359-2 372.
36 WANG J， YUAN D. Roles of western and eastern boundary reflections in the interannual sea level variations during negative Indian Ocean Dipole events［J］. Journal of Physical Oceanography， 2015， 45： 1 804-1 821.
37 SHANKARA D， VINAYACHANDRANB P N， UNNIKRISHNANA A S. The monsoon currents in the North Indian Ocean［J］. Progress in Oceanography， 2000， 52（1）： 63-120.
Options
Outlines

/

〈 〉

Address: No. 8, Tianshui Middle Road, Lanzhou, Gansu
QQ：114723517
Tel：0931-8762293　E-mail：adearth@lzb.ac.cn
陇ICP备2021001824号-5　 甘公网安备62010202000687