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Antarctic slush-ice algal accumulation not quantified through conventional satellite imagery: beware the ice of March
Citation
Lieser, JL and Curran, MAJ and Bowie, AR and Davidson, AT and Doust, SJ and Fraser, AD and Galton-Fenzi, BK and Massom, RA and Meiners, KM and Melbourne-Thomas, J and Reid, PA and Strutton, PG and Vance, TR and Vancoppenolle, M and Westwood, KJ and Wright, SW, Antarctic slush-ice algal accumulation not quantified through conventional satellite imagery: beware the ice of March, The Cryosphere Discussions, 9 pp. 6187-6222. ISSN 1994-0432 (2015) [Non Refereed Article]
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DOI: doi:10.5194/tcd-9-6187-2015
Abstract
Our current knowledge of broad-scale patterns of primary production in the
Southern Ocean is derived from satellite ocean-colour estimates of
chlorophyll a (Chl a) in the open ocean, typically in spring-summer.
Here, we provide evidence that large-scale intra-ice phytoplankton surface
aggregation occur off the coast of Antarctica during austral autumn, and that
these "blooms" are largely undetected in satellite ocean-colour time series
(which mask the ice-covered ocean). We present an analysis of (i) true-colour
(visible) satellite imagery in combination with (ii) conventional
ocean-colour data, and (iii) direct sampling from a research vessel, to
identify and characterise a large-scale intra-ice algal occurrence off the
coast of East Antarctica in early autumn (March) 2012. We also present
evidence of these autumn "blooms" in other regions (for example, Princess
Astrid Coast in 2012) and other years (for example, Terra Nova Bay in 2015)
implying regular and widespread occurrence of these phenomena. The occurrence
of such undetected algal accumulations implies that the magnitude of primary
production in the Southern Ocean is currently underestimated.
Item Details
| Item Type: | Non Refereed Article |
|---|---|
| Keywords: | Antarctic sea ice, algae, remote sensing |
| Research Division: | Earth Sciences |
| Research Group: | Physical geography and environmental geoscience |
| Research Field: | Physical geography and environmental geoscience not elsewhere classified |
| Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
| Objective Group: | Understanding climate change |
| Objective Field: | Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts) |
| UTAS Author: | Lieser, JL (Dr Jan Lieser) |
| UTAS Author: | Curran, MAJ (Dr Mark Curran) |
| UTAS Author: | Bowie, AR (Professor Andrew Bowie) |
| UTAS Author: | Fraser, AD (Dr Alex Fraser) |
| UTAS Author: | Galton-Fenzi, BK (Dr Ben Galton-Fenzi) |
| UTAS Author: | Massom, RA (Dr Robert Massom) |
| UTAS Author: | Meiners, KM (Dr Klaus Meiners) |
| UTAS Author: | Melbourne-Thomas, J (Dr Jessica Melbourne-Thomas) |
| UTAS Author: | Strutton, PG (Professor Peter Strutton) |
| UTAS Author: | Vance, TR (Dr Tessa Vance) |
| UTAS Author: | Westwood, KJ (Dr Karen Westwood) |
| UTAS Author: | Wright, SW (Dr Simon Wright) |
| ID Code: | 104455 |
| Year Published: | 2015 |
| Deposited By: | CRC-Antarctic Climate & Ecosystems |
| Deposited On: | 2015-11-12 |
| Last Modified: | 2015-11-12 |
| Downloads: | 0 |
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