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Annual amphidromes: a common feature in the ocean?

Annual amphidromes: a common feature in the ocean?
Annual amphidromes: a common feature in the ocean?
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.
amphidrome, sea level, sea surface height, sea surface temperature, global, seasonal cycle
425-427
Chen, G.
ae218ce4-4fea-4495-9520-0e2111c5ce6e
Quartly, G.
3d1e4e87-f001-4d18-b95f-9bca4db6ff9d
Chen, G.
ae218ce4-4fea-4495-9520-0e2111c5ce6e
Quartly, G.
3d1e4e87-f001-4d18-b95f-9bca4db6ff9d

Chen, G. and Quartly, G. (2005) Annual amphidromes: a common feature in the ocean? IEEE Geoscience and Remote Sensing Letters, 2 (4), 425-427. (doi:10.1109/LGRS.2005.854205).

Record type: Article

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.

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Published date: 2005
Keywords: amphidrome, sea level, sea surface height, sea surface temperature, global, seasonal cycle

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Local EPrints ID: 17319
URI: https://eprints.soton.ac.uk/id/eprint/17319
PURE UUID: 7ff8f11c-0433-40a0-bf37-56d223990b6a

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Date deposited: 16 Sep 2005
Last modified: 24 Jul 2017 16:36

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