eCite Digital Repository
East Antarctic landfast sea ice distribution and variability, 2000-08
Citation
Fraser, AD and Massom, RA and Michael, KJ and Galton-Fenzi, BK and Lieser, JL, East Antarctic landfast sea ice distribution and variability, 2000-08, Journal of Climate, 25, (4) pp. 1137-1156. ISSN 0894-8755 (2012) [Refereed Article]
![]() | PDF Restricted - Request a copy 5Mb |
Copyright Statement
© Copyright 2012 AMS
DOI: doi:10.1175/JCLI-D-10-05032.1
Abstract
This study presents the first continuous, high spatiotemporal resolution time series of landfast sea ice extent
along the East Antarctic coast for the period March 2000–December 2008. The time series was derived from
consecutive 20-day cloud-free Moderate Resolution Imaging Spectroradiometer (MODIS) composite images.
Fast ice extent across the East Antarctic coast shows a statistically significant (1.43% ±0.30% yr-1)
increase. Regionally, there is a strong increase in the Indian Ocean sector (20°–90°E, 4.07% ±0.42% yr-1),
and a nonsignificant decrease in the western Pacific Ocean sector (90°–160°E, 20.40% ±0.37% yr-1). An
apparent shift from a negative to a positive extent trend is observed in the Indian Ocean sector from 2004. This
shift also coincides with a greater amount of interannual variability. No such shift in apparent trend is observed
in the western Pacific Ocean sector, where fast ice extent is typically higher and variability lower than
the Indian Ocean sector. The limit to the maximum fast ice areal extent imposed by the location of grounded
icebergs modulates the shape of the mean annual fast ice extent cycle to give a broad maximum and an abrupt,
relatively transient minimum. Ten distinct fast ice regimes are identified, related to variations in bathymetry
and coastal configuration. Fast ice is observed to form in bays, on the windward side of large grounded
icebergs, between groups of smaller grounded icebergs, between promontories, and upwind of coastal features
(e.g., glacier tongues). Analysis of the timing of fast ice maxima and minima is also presented and
compared with overall sea ice maxima/minima timing.
Item Details
Item Type: | Refereed Article |
---|---|
Keywords: | Antarctic, sea ice, landfast, time series |
Research Division: | Earth Sciences |
Research Group: | Physical geography and environmental geoscience |
Research Field: | Glaciology |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Climate variability (excl. social impacts) |
UTAS Author: | Fraser, AD (Dr Alex Fraser) |
UTAS Author: | Massom, RA (Dr Robert Massom) |
UTAS Author: | Michael, KJ (Dr Kelvin Michael) |
UTAS Author: | Galton-Fenzi, BK (Dr Ben Galton-Fenzi) |
UTAS Author: | Lieser, JL (Dr Jan Lieser) |
ID Code: | 76916 |
Year Published: | 2012 |
Web of Science® Times Cited: | 79 |
Deposited By: | CRC-Antarctic Climate & Ecosystems |
Deposited On: | 2012-03-14 |
Last Modified: | 2013-04-26 |
Downloads: | 5 View Download Statistics |
Repository Staff Only: item control page