Location of Repository

Annual amphidromes: a common feature in the ocean?

By G. Chen and G. Quartly

Abstract

The scientific term "amphidrome" is usually associated with tides in oceanography. The dozen tidal amphidromes observed in the ocean are critical points that determine the fundamental pattern of the global tidal system. Exploration of recently available satellite data with an unprecedented 1-2 decades duration suggests that an amphidrome is not a tide-only phenomenon in the ocean. Analysis of altimeter-derived sea level anomaly (SLA) data and radiometer-derived sea surface temperature (SST) data allows ten amphidromic points to be clearly identified in annual SLA and SST variations. These amphidromes are located in the tropical areas of the Pacific, Atlantic, and Indian oceans. Their existence implies that the annual cycle (in time) of the atmosphere-ocean system is translated into a rotary variation (in space) for many of the geophysical parameters. It can be concluded that annual amphidromes are common, the knowledge of which is of particular interest, given their annually "constant" nature, for the monitoring and understanding of oceanic, climatic, as well as biological variabilities at seasonal to decadal scales, which strongly affect many aspects of the natural and societal activities on the globe

Topics: GC
Year: 2005
OAI identifier: oai:eprints.soton.ac.uk:17319
Provided by: e-Prints Soton

Suggested articles

Preview

Citations

  1. (1994). A preliminary evaluation of ocean topography from the TOPEX/POSEIDON mission".
  2. (1998). An improved mapping method of multisatellite altimeter data".
  3. (1992). Annual sea level variations in the southern tropical Indian Ocean from Geosat and shallow-water simulations".
  4. (1999). Contribution of wind forcing, waves and surface heating to sea surface height observations in the Pacific Ocean.
  5. (1998). Forced Rossby waves in the southern tropical Indian Ocean".
  6. (1994). Global low harmonic degree models of the seasonal variability and residual ocean tides from TOPEX/POSEIDON altimeter data".
  7. (1998). NOAA/NASA AVHRR Oceans Pathfinder sea surface temperature data set user's reference manual,
  8. (2004). Observing the coupling effect between warm pool and “rain pool” in the tropical Pacific". Remote Sens.
  9. (1994). Ocean dynamics in the region between Australia and Indonesia and its influence on the variation of the sea surface temperature in a global general circulation model".
  10. (1996). Oceanography: An Invitation to Marine Science",
  11. (1994). Preliminary assessment of the accuracy and precision of TOPEX/POSEIDON altimeter data with respect to the large-scale ocean circulation".
  12. (1974). Sea-Level Changes",
  13. (2000). Seasonal sea surface height variability in the North Atlantic Ocean",
  14. (1997). Steric and wind-induced changes in TOPEX/POSEIDON large-scale sea surface topography observations".
  15. (1994). The global distribution of the seasonal sea level cycle calculated from coastal tide gauge data".
  16. (1992). The global structure of the annual and semiannual sea surface height variability from Geosat altimeter data".
  17. (1955). The seasonal oscillation in sea level".
  18. (1989). The wind-driven seasonal circulation in the southern tropical Indian Ocean".
  19. (1984). The worldwide distribution of the seasonal cycle of mean sea level",
  20. (1994). TOPEX/POSEIDON: The 2-cm solution".
  21. (2001). Transition regions and their role in the relationship between sea surface height and subsurface temperature structure in the Atlantic Ocean"
  22. (2004). User Handbook, (M)SLA and (M)ADT Near Real Time and Delayed Time Products",

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.