University Of Tasmania
Reid et al. - 2016 - Antarctica Sea ice extent, concentration, and duration in State of the Climate 2015.pdf (1.1 MB)

Sea ice extent, concentration, and duration [in “State of the Climate in 2015”]

Download (1.1 MB)
journal contribution
posted on 2023-05-18, 21:30 authored by Phillip ReidPhillip Reid, Robert MassomRobert Massom, Stammerjohn, S, Barreira, S, Jan LieserJan Lieser, Scambos, T
Net sea ice areal extent was well above average during the first few months of 2015 (Fig. 6.8a). Monthly record extents were observed in January (7.46 × 106 km2), April (9.06 × 106 km2), and May (12.1 × 106 km2). The January extent marked the highest departure from average for any month since records began in 1979, at 2.39 × 106 km2 above the 1981-2010 mean of 5.07 × 106 km2, or nearly 50% greater. These early season records follow on from the record high extent and late retreat of sea ice in 2014 (Reid et al. 2015). During the first half of 2015, there were 65 individual days of record daily sea ice extent, the last occurring on 11 July, and 46 record-breaking days of sea ice area within the first half of the year. However, the expansion of sea ice slowed so dramatically midyear that although sea ice area was at a record high level in May, it was at a record low level in August, just 83 days later (Fig. 6.8a). Close-to-average net sea ice extent levels were then observed in the latter half of 2015.


Publication title

Bulletin of the American Meteorological Society










Institute for Marine and Antarctic Studies


Amer Meteorological Soc

Place of publication

Boston, USA, MA

Rights statement

Copyright 2016 American Meteorological Society (AMS). Permission to use figures, tables, and brief excerpts from this work in scientific and educational works is hereby granted provided that the source is acknowledged. Any use of material in this work that is determined to be “fair use” under Section 107 of the U.S. Copyright Act September 2010 Page 2 or that satisfies the conditions specified in Section 108 of the U.S. Copyright Act (17 USC §108, as revised by P.L. 94-553) does not require the AMS’s permission. Republication, systematic reproduction, posting in electronic form, such as on a web site or in a searchable database, or other uses of this material, except as exempted by the above statement, requires written permission or a license from the AMS. Additional details are provided in the AMS Copyright Policy, available on the AMS Web site located at ( or from the AMS at 617-227-2425 or

Repository Status

  • Open

Socio-economic Objectives

Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)