Observation and parameterization of small icebergs: Drifting breakwaters in the southern ocean

• Published in: Ocean Modelling
• Main Authors: Ardhuin, Fabrice, Tournadre, Jean, Queffeulou, Pierre, Ardhuin, Fanny, Collard, Fabrice
• Format: Article in Journal/Newspaper
• Language: English
• Published: Elsevier 2011
• Subjects: Pacific; Southern Ocean
• Online Access: https://archimer.ifremer.fr/doc/00044/15535/13317.pdf; https://doi.org/10.1016/j.ocemod.2011.03.004; https://archimer.ifremer.fr/doc/00044/15535/

The variability of small-size iceberg distributions is revealed from a novel analysis of satellite altimeter data. A strong annual cycle is modulated by pulse-like events confined to single ocean basins, with dense iceberg populations in the South Atlantic in 2004-2005, and in the South Pacific in 2008. Anomalies in sea surface temperatures of the order of 1 degrees C may be related to the iceberg distribution. Icebergs also appear very strongly associated with anomalies in the heights of ocean waves. A preliminary parameterization of wave blocking by icebergs significantly reduces wave model errors in the region south of 45 degrees South, and has a perceptible influence on all the west coasts of the Southern hemisphere. (C) 2011 Elsevier Ltd. All rights reserved.