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  Present and future mass balance of the ice sheets simulated with GGM

Ohmura, A., Wild, M., & Bengtsson, L. (1996). Present and future mass balance of the ice sheets simulated with GGM. Annals of Glaciology, 23, 187-193. doi:10.3189/s0260305500013434.

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 Urheber:
Ohmura, A., Autor
Wild, M., Autor
Bengtsson, Lennart1, Autor           
Affiliations:
1MPI for Meteorology, Max Planck Society, Bundesstraße 53, 20146 Hamburg, DE, ou_913545              

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Schlagwörter: ablation; accumulation; carbon dioxide doubling; climate forcing; GCM; ice sheet mass balance; sea level
 Zusammenfassung: A high-resolution GCM ECHAM3 T106 was used to simulate the climates of the present and of the future under doubled CO2. The ECHAM3 T106 was integrated for an equivalent time of 5 years (1) with the observed SST of the 1980s and (2) with the SST for the 2 × CO2 climate generated from the ECHAM1 T21 coupled transient experiment. The main motivation for using the GCM to simulate the mass balance is the level of skill in simulating precipitation and accumulation recently achieved in the high-resolution GCM experiment. The ablation is computed, based on the GCM internal surface fluxes and the temperature/ablation relationship formulated on the Greenland field data. The two ice sheets show very different reactions towards doubling the CO2. As the decrease in accumulation and the increase in ablation in Greenland cause an annual mean specific mass balance of -225 mm (eq. -390km3), the increase in accumulation and virtually non-melt conditions in Antarctica result in a mean annual specific mass balance of + 23 mm (eq. + 325 km3). The sum of the mass balance on both ice sheets is equivalent to the annual sea-level rise of 0.2 mm. This experiment shows that other mechanisms for sea-level change, such as the thermal expansion of the sea water and the melt of small mountain glaciers, will remain important in the coming century.

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Sprache(n): eng - English
 Datum: 1996
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: Expertenbegutachtung
 Identifikatoren: DOI: 10.3189/s0260305500013434
BibTex Citekey: Ohmura1996187
 Art des Abschluß: -

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Titel: Annals of Glaciology
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: International Glaciology Society
Seiten: - Band / Heft: 23 Artikelnummer: - Start- / Endseite: 187 - 193 Identifikator: ISSN: 02603055