Search Results

You are looking at 1 - 7 of 7 items for :

  • Water budget/balance x
  • Indian Ocean Climate x
  • All content x
Clear All
Clémentde Boyer Montégut, Jérôme Vialard, S. S. C. Shenoi, D. Shankar, Fabien Durand, Christian Ethé, and Gurvan Madec

understand how oceanic processes act to balance the atmospheric forcing and regulate the SST in the NIO. To do so, a mixed layer budget method ( Vialard and Delecluse 1998 ; Vialard et al. 2001 ) allows us to compute the vertically averaged temperature (salinity) tendency terms within the time-varying MLD. The depth of the mixed layer over which the diagnostic is applied, is computed using a density criterion. This depth is the bottom of the last model level from the surface, where the density is

Full access
Tommy G. Jensen

wind patterns and SST during IOD events in El Niño years and during non–El Niño years, and provides a detailed discussion of the role of advection and heat flux. The two following papers address the response of the Indian Ocean. Using an Indian Ocean model driven with composite winds, Jensen finds that the annual clockwise cross-equatorial circulation of the upper Indian Ocean on average is slowed down during La Niña years, allowing Bay of Bengal water to enter the Arabian Sea. Conversely, the

Full access
Rui-Jin Hu and J. Stuart Godfrey

flux across that latitude in a closed basin, is in geostrophic balance. If the western and eastern boundary walls at latitude y are vertical to a great enough depth that a “depth of no motion” Z can be used for estimating the side-to-side geostrophic flow, then (on multiplying both sides of the mass budget equation by Coriolis parameter f  ) one finds where P is the depth-integrated steric height defined in appendix B of Part I . Here Δ E ( y , z ), Δ W ( y , z ) are the specific volume

Full access
J. Stuart Godfrey, Rui-Jin Hu, Andreas Schiller, and R. Fiedler

that can be stored in the ocean over one summer monsoon and restored to the atmosphere in following summers—may also be underestimated. If so, some predictability to the monsoon—and indeed, possibly also of the El Nino–Southern Oscillation phenomenon—may be being missed. For example, Meehl et al. (2003) have suggested that the tropospheric quasi-biennial oscillation may relate to storage of cold water created in a strong monsoon year in the tropical Indian Ocean, to cool the SST the following

Full access
Joaquim Ballabrera-Poy, Eric Hackert, Raghu Murtugudde, and Antonio J. Busalacchi

environmental errors (such as ionospheric or water vapor corrections to travel time). Along-track data are filtered with a low-pass filter and binned every 0.25° and every 1/36 of a year. Operationally, TPJ anomalies are defined as sea level deviations from a 9-yr (1993–2001) mean sea level, which removes the geoid error. Next, the along-track data is gridded spatially using an optimal interpolation technique that takes into account grid location and propagation speed in the sea level signal. The 1993

Full access
Roxana C. Wajsowicz

water balance calculations in the Mosaic LSM. NASA Tech. Memo. 104606, Vol. 9, 69 pp . Latif , M. , T. P. Barnett , M. A. Cane , M. Flugel , N. E. Graham , H. von Storch , J-S. Xu , and S. E. Zebiak , 1994 : A review of ENSO prediction studies. Climate Dyn. , 9 , 167 – 179 . Li , T. , B. Wang , C-P. Chang , and Y. Zhang , 2003 : A theory for the Indian Ocean dipole–zonal mode. J. Atmos. Sci. , 60 , 2119 – 2135 . Lorenz , E. N. , 1975 : The physical

Full access
Jean Philippe Duvel and Jérôme Vialard

also suggested that formation of a warm layer prior to the cooling event might contribute to the enhancement of the SST perturbation. The balance between the different physical sources that can explain the strong intraseasonal SST perturbation is still unknown and is probably variable from one event to another. A strong point however is that the shallow thermocline between 5° and 10°S, due to average Ekman pumping during NH winter, is a fundamental feature in helping to explain these SST

Full access