Is the Simultaneous Onset of the Florida, East Australia, and Indian Ocean Currents Related to Himalayan tectonics?

2020 ◽  
Author(s):  
Gregor Eberli ◽  
Christian Betzler ◽  
Anna Ling Hui Mee ◽  
Dick Kroon ◽  
Silvia Spezzaferri
2009 ◽  
Vol 379 ◽  
pp. 267-278 ◽  
Author(s):  
PA Gagnaire ◽  
Y Minegishi ◽  
J Aoyama ◽  
E Réveillac ◽  
T Robinet ◽  
...  

2020 ◽  
Author(s):  
Christian Betzler ◽  
Gregor Eberli ◽  
Thomas Luedmann ◽  
Sebastian Lindhorst ◽  
Dick Kroon

2012 ◽  
Vol 42 (7) ◽  
pp. 1099-1123 ◽  
Author(s):  
Toshiaki Shinoda ◽  
Weiqing Han ◽  
E. Joseph Metzger ◽  
Harley E. Hurlburt

Abstract The seasonal variation of Indonesian Throughflow (ITF) transport is investigated using ocean general circulation model experiments with the Hybrid Coordinate Ocean Model (HYCOM). Twenty-eight years (1981–2008) of ⅓° Indo-Pacific basin HYCOM simulations and three years (2004–06) from a global HYCOM simulation are analyzed. Both models are able to simulate the seasonal variation of upper-ocean currents and the total transport through Makassar Strait measured by International Nusantara Stratification and Transport (INSTANT) moorings reasonably well. The annual cycle of upper-ocean currents is then calculated from the Indo-Pacific HYCOM simulation. The reduction of southward currents at Makassar Strait during April–May and October–November is evident, consistent with the INSTANT observations. Analysis of the upper-ocean currents suggests that the reduction in ITF transport during April–May and October–November results from the wind variation in the tropical Indian Ocean through the generation of a Wyrtki jet and the propagation of coastal Kelvin waves, while the subsequent recovery during January–March originates from upper-ocean variability associated with annual Rossby waves in the Pacific that are enhanced by western Pacific winds. These processes are also found in the global HYCOM simulation during the period of the INSTANT observations. The model experiments forced with annual-mean climatological wind stress in the Pacific and 3-day mean wind stress in the Indian Ocean show the reduction of southward currents at Makassar Strait during October–November but no subsequent recovery during January–March, confirming the relative importance of wind variations in the Pacific and Indian Oceans for the ITF transport in each season.


2015 ◽  
Vol 65 (9-10) ◽  
pp. 1235-1247 ◽  
Author(s):  
Sanikommu Sivareddy ◽  
Muthalagu Ravichandran ◽  
Madathil Sivasankaran Girishkumar ◽  
Koneru Venkata Siva Rama Prasad

Author(s):  
Neethu Chacko ◽  
M M Ali

This study examines the effect of surface currents on the bulk algorithm calculation of wind stress estimated using the scatterometer data during 2007-2020 in the Indian Ocean. In the study region as a whole the wind stress decreased by 5.4% by including currents into the wind stress equation. The most significant reduction in the wind stress is found along the most energetic regions with strong currents such as Somali Current, Equatorial Jets and Aghulhas retroflection. A highest reduction of 11.5% is observed along the equator where the Equatorial Jets prevail. A sensitivity analysis has been carried out for the study region and for different seasons to assess the relative impact of winds and currents in the estimation of wind stress by changing the winds while keeping the currents constants and vice versa. The inclusion of currents decreased the wind stress and this decrease is prominent when the currents are stronger. This study showed that equatorial Indian Ocean is the most sensitive region where the current can impact on wind stress estimation. The results showed that uncertainties in the wind stress estimations are quite large at regional levels and hence better representation of wind stress incorporating ocean currents should be considered in the ocean/climatic models for accurate air-sea interaction studies.


2019 ◽  
Vol 9 (16) ◽  
pp. 8953-8964 ◽  
Author(s):  
Marlene Jahnke ◽  
Martin Gullström ◽  
Josefine Larsson ◽  
Maria E. Asplund ◽  
Said Mgeleka ◽  
...  

1954 ◽  
Vol 7 (4) ◽  
pp. 343-361
Author(s):  
C. E. N. Frankcom ◽  
E. W. Barlow

One of the earliest publications about ocean currents was Dampier's Discourse of Winds, Breezes, Storm Tides and Currents published in about 1700. Dampier wrote his book in 1688 and he says:By currents I mean a motion of the sea which is different from the tides in several respects—both as to its duration and also as to its course; currents run a day, a week, nay sometimes more one way, then it may be, run another way. In some places they run six months one way and six months another. In some places they run constantly one way and never shift at all.After some remarkably detailed discussion of currents in the West Indies and off the coast of Africa and in the south seas he says, of the Indian Ocean currents, ‘north of the line the current stays with the monsoon but does not shift altogether so soon, sometimes not for three weeks or more and then never shifts again till the monsoon is settled in the contrary way’. Of the Gulf Stream he says, ‘near the shores on each side of this Gulf there are tides, especially on the Florida shore, and ships may pass which way they please, if they are acquainted’. In conclusion he says, ‘I humbly offer this not as a complete and perfect account but as a rude and imperfect beginning or specimen of what may be done by abler hands hereafter’.


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