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yexuqing木蟲(chóng)之王 (文學(xué)泰斗)
太陽(yáng)系系主任
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[交流]
The Ronne Ice Shelf survived the last interglacial
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The Ronne Ice Shelf survived the last interglacial 羅納冰架在末次間冰期中幸存 ▲ 作者：Eric W. Wolff, Robert Mulvaney et al. ▲ 鏈接：https://www.nature.com/articles/s41586-024-08394-w ▲ 摘要：在此，我們使用了來(lái)自Skytrain ice Rise的冰芯海鹽數(shù)據(jù)。該冰芯位于西南極冰蓋（WAIS）附近，表明在末次間冰期（LIG）的大部分時(shí)間里，羅納冰架仍然存在，并且接近其當(dāng)前的范圍。水同位素?cái)?shù)據(jù)與WAIS的退縮一致，但似乎與WAIS和大型南極冰架都消失的更劇烈的模式實(shí)現(xiàn)不一致。 這一新的限制要求重新評(píng)估LIG海平面預(yù)算的其他要素。這一結(jié)果還削弱了促使模式模擬預(yù)測(cè)未來(lái)海平面上升速度至2300年及以后的最高預(yù)測(cè)值的觀測(cè)基礎(chǔ)。 ▲ Abstract：Here we use sea salt data from an ice core from Skytrain Ice Rise, adjacent to WAIS, to show that, during most of the LIG, the Ronne Ice Shelf was still in place, and close to its current extent. Water isotope data are consistent with a retreat of WAIS, but seem inconsistent with more dramatic model realizations in which both WAIS and the large Antarctic ice shelves were lost. This new constraint calls for a reappraisal of other elements of the LIG sea-level budget. It also weakens the observational basis that motivated model simulations projecting the highest end of projections for future rates of sea-level rise to 2300 and beyond. |
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