The effect of a Holocene climatic optimum on the evolution of the Greenland ice sheet during the last 10 kyr
Research output: Contribution to journal › Journal article › Research › peer-review
Documents
- effect_of_a_holocene_climatic_optimum_on_the_evolution_of_the_greenland_ice_sheet_during_the_last_10_kyr
Final published version, 939 KB, PDF document
The Holocene climatic optimum was a period 8–5 kyr ago when annual mean surface temperatures in Greenland were 2–3°C warmer than present-day values. However, this warming left little imprint on commonly used temperature proxies often used to derive the climate forcing for simulations of the past evolution of the Greenland ice sheet. In this study, we investigate the evolution of the Greenland ice sheet through the Holocene when forced by different proxy-derived temperature histories from ice core records, focusing on the effect of sustained higher surface temperatures during the early Holocene. We find that the ice sheet retreats to a minimum volume of ~0.15–1.2 m sea-level equivalent smaller than present in the early or mid-Holocene when forcing an ice-sheet model with temperature reconstructions that contain a climatic optimum, and that the ice sheet has continued to recover from this minimum up to present day. Reconstructions without a warm climatic optimum in the early Holocene result in smaller ice losses continuing throughout the last 10 kyr. For all the simulated ice-sheet histories, the ice sheet is approaching a steady state at the end of the 20th century.
Original language | English |
---|---|
Journal | Journal of Glaciology |
Volume | 64 |
Issue number | 245 |
Pages (from-to) | 477-488 |
Number of pages | 12 |
ISSN | 0022-1430 |
DOIs | |
Publication status | Published - 22 May 2018 |
Number of downloads are based on statistics from Google Scholar and www.ku.dk
No data available
ID: 197000892