Role of Antarctic ice mass balance in present-day sea-level change

C. K. Shum, Chung-Yen Kuo, Jun yi Guo

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The Antarctic ice sheet is arguably the most critical in terms of future sea-level rise, primarily because it contains ∼70% of the world's fresh water. While there exists evidence of accelerated ice-sheet ablation during the past decade, the possibility that the ice sheets contributed little to 20th century sea-level rise could result in Antarctica becoming the largest contributor to sea-level rise during the 21st century. Here we review the findings of studies published following the 2007 Intergovernmental Panel for Climate Change (IPCC) study, focusing on the role of Antarctica in present-day (1992-2006) sea-level rise. We show that the choice of glacial isostatic adjustment (GIA) model significantly affects GRACE-estimated Antarctic mass loss, adding 0.25-0.45 mm/yr to the estimate of sea-level rise. The current estimate of Antarctica's contribution to sea-level rise has a wide range: from -0.12 to +0.52 mm/yr. The discrepancy between observed sea-level trend of 1.8 mm/yr and those estimated from various geophysical sources (2.10 ± 0.99 mm/yr) is 0.30 mm/yr. The role of Antarctica in sea-level rise might be better constrained by lengthening satellite observations, using long-term GPS data to discriminate subglacial vertical motion from ice mass balance, and detecting the sea-level signal due to elastic loading from the melting ice-sheets.

Original languageEnglish
Pages (from-to)149-161
Number of pages13
JournalPolar Science
Volume2
Issue number2
DOIs
Publication statusPublished - 2008 Jun 25

Fingerprint

sea level change
sea level
mass balance
ice
ice sheet
Antarctica
GRACE
twenty first century
sea level rise
ablation
GPS
melting
climate change

All Science Journal Classification (ASJC) codes

  • Ecology, Evolution, Behavior and Systematics
  • Aquatic Science
  • Ecology
  • Earth and Planetary Sciences(all)

Cite this

Shum, C. K. ; Kuo, Chung-Yen ; Guo, Jun yi. / Role of Antarctic ice mass balance in present-day sea-level change. In: Polar Science. 2008 ; Vol. 2, No. 2. pp. 149-161.
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Role of Antarctic ice mass balance in present-day sea-level change. / Shum, C. K.; Kuo, Chung-Yen; Guo, Jun yi.

In: Polar Science, Vol. 2, No. 2, 25.06.2008, p. 149-161.

Research output: Contribution to journalArticle

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