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A biologically relevant method for considering patterns of oceanic retention in the Southern Ocean

Citation

Mori, M and Corney, SP and Melbourne-Thomas, J and Klocker, A and Sumner, M and Constable, A, A biologically relevant method for considering patterns of oceanic retention in the Southern Ocean, Progress in Oceanography, 159 pp. 1-12. ISSN 0079-6611 (2017) [Refereed Article]

Copyright Statement

2017 Elsevier Ltd.

DOI: doi:10.1016/j.pocean.2017.09.008

Abstract

Many marine species have planktonic forms either during a larval stage or throughout their lifecycle that move passively or are strongly influenced by ocean currents. Understanding these patterns of movement is important for informing marine ecosystem management and for understanding ecological processes generally. Retention of biological particles in a particular area due to ocean currents has received less attention than transport pathways, particularly for the Southern Ocean. We present a method for modelling retention time, based on the half-life for particles in a particular region, that is relevant for biological processes. This method uses geostrophic velocities at the ocean surface, derived from 23years of satellite altimetry data (19932016), to simulate the advection of passive particles during the Southern Hemisphere summer season (from December to March). We assess spatial patterns in the retention time of passive particles and evaluate the processes affecting these patterns for the Indian sector of the Southern Ocean. Our results indicate that the distribution of retention time is related to bathymetric features and the resulting ocean dynamics. Our analysis also reveals a moderate level of consistency between spatial patterns of retention time and observations of Antarctic krill (Euphausia superba) distribution.

Item Details

Item Type:Refereed Article
Keywords:retention time, Southern Ocean, particle advection, ecosystem modelling, plankton, krill distribution
Research Division:Earth Sciences
Research Group:Oceanography
Research Field:Physical Oceanography
Objective Division:Environment
Objective Group:Climate and Climate Change
Objective Field:Climate and Climate Change not elsewhere classified
Author:Mori, M (Ms Mao Mori)
Author:Corney, SP (Dr Stuart Corney)
Author:Melbourne-Thomas, J (Dr Jessica Melbourne-Thomas)
Author:Klocker, A (Dr Andreas Klocker)
Author:Constable, A (Dr Andrew Constable)
ID Code:121318
Year Published:2017
Deposited By:Centre for Oceans and Cryosphere
Deposited On:2017-09-22
Last Modified:2017-11-30
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