Assessment of mass-induced sea level variability in the Tropical Indian Ocean based on GRACE and altimeter observations

2021 ◽  
Vol 95 (2) ◽  
Author(s):  
Shiva Shankar Manche ◽  
Rabindra K. Nayak ◽  
Prakash Chandra Mohanty ◽  
M. V. R. Shesasai ◽  
V. K. Dadhwal
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Tropical Indian Ocean ◽  
Sea Level Variability

Baroclinic Characteristics and Energetics of Annual Rossby Waves in the Southern Tropical Indian Ocean

2020 ◽  
Vol 50 (9) ◽  
pp. 2591-2607
Author(s):  
Ke Huang ◽  
Dongxiao Wang ◽  
Ming Feng ◽  
Weiqing Han ◽  
Gengxin Chen ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Large Scale ◽  
Rossby Waves ◽  
Tropical Indian Ocean ◽  
High Energy ◽  
High Order ◽  
Baroclinic Mode ◽  
Sea Level Variability ◽  
Low Order

AbstractThe first baroclinic mode Rossby wave is known to be of critical importance to the annual sea level variability in the southern tropical Indian Ocean (STIO; 0°–20°S, 50°–115°E). In this study, an analysis of continuously stratified linear ocean model reveals that the second baroclinic mode also has significant contribution to the annual sea level variability (as high as 81% of the first baroclinic mode). The contributions of residual high-order modes (3 ≤ n ≤ 25) are much less. The superposition of low-order (first and second) baroclinic Rossby waves (BRWs) primarily contribute to the high energy center of sea level variability at ~10°S in the STIO and the vertical energy penetration below the seasonal thermocline. We have found that 1) the low-order BRWs, having longer zonal wavelengths and weaker damping, can couple more efficiently to the local large-scale wind forcing than the high-order modes and 2) the zonal coherency of the Ekman pumping results in the latitudinal energy maximum of low-order BRWs. Overall, this study extends the traditional analysis to suggest the characteristics of the second baroclinic mode need to be taken into account in interpreting the annual variability in the STIO.

Impact of Satellite Altimetry on Simulations of Sea Level Variability by an Indian Ocean Model

2001 ◽  
Vol 24 (1) ◽  
pp. 53-63 ◽  
Author(s):  
S. K. Singh ◽  
Sujit Basu ◽  
Raj Kumar ◽  
Vijay K. Agarwal
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Satellite Altimetry ◽  
Ocean Model ◽  
Sea Level Variability

Natural decadal sea-level variability in the Indian Ocean: lessons from CMIP models

2019 ◽  
Vol 53 (9-10) ◽  
pp. 5653-5673
Author(s):  
A. G. Nidheesh ◽  
Matthieu Lengaigne ◽  
Jérôme Vialard ◽  
Takeshi Izumo ◽  
A. S. Unnikrishnan ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Sea Level Variability ◽  
The Indian Ocean

scholarly journals Does sea level pressure modulate the dynamic and thermodynamic forcing in the tropical Indian Ocean?

2011 ◽  
Vol 33 (7) ◽  
pp. 1991-2002 ◽  
Author(s):  
P. G. Nisha ◽  
P. M. Muraleedharan ◽  
M. G. Keerthi ◽  
P. V. Sathe ◽  
M. Ravichandran
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Tropical Indian Ocean ◽  
Sea Level Pressure ◽  
Level Pressure

scholarly journals Basin-wide sea level coherency in the tropical Indian Ocean driven by Madden–Julian Oscillation

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
B. Rohith ◽  
Arya Paul ◽  
Fabien Durand ◽  
Laurent Testut ◽  
S. Prerna ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Sea Level ◽  
Tropical Indian Ocean ◽  
Madden Julian Oscillation
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