| Autor: |
Guarino, Maria-Vittoria, Sime, Louise C., Schroeder, David, Malmierca-Vallet, Irene, Rosenblum, Erica, Ringer, Mark, Ridley, Jeff, Feltham, Danny, Bitz, Cecilia, Steig, Eric J., Wolff, Eric, Stroeve, Julienne, Sellar, Alistair |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| ISSN: |
1758-678X |
| Popis: |
The Last Interglacial (LIG), a warmer period 130-116 ka before present, is a potential analog for future climate change. Stronger LIG summertime insolation at high northern latitudes drove Arctic land summer temperatures 4-5 ◦C higher than the preindustrial era. Climate model simulations have previously failed to capture these elevated temperatures, possibly be- cause they were unable to correctly capture LIG sea-ice changes. Here, we show the latest version of the fully-coupled UK Hadley Center climate model (HadGEM3) simulates a more accurate Arctic LIG climate, including elevated temperatures. Improved model physics, in- cluding a sophisticated sea-ice melt-pond scheme, result in a complete simulated loss of Arctic sea ice in summer during the LIG, which has yet to be simulated in past generations of mod- els. This ice-free Arctic yields a compelling solution to the longstanding puzzle of what drove LIG Arctic warmth and supports a fast retreat of future Arctic summer sea ice. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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