Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020GL087207 |
Rapid cooling and increased storminess triggered by freshwater in the North Atlantic | |
M. Oltmanns; J. Karstensen; G. W. K. Moore; S. A. Josey | |
2020-06-20 | |
发表期刊 | Geophysical Research Letters |
出版年 | 2020 |
英文摘要 | Recent winters have been unique due to the rapid and extreme cooling of the subpolar North Atlantic. Here, we present a novel view on its causes and consequences. Combining in‐situ observations with remote sensing and atmospheric reanalysis data, we show that increased freshening of the subpolar region gives rise to a faster surface cooling in fall and winter. Large freshwater events, in particular, result in pronounced cold anomalies with sharp temperature gradients that promote an enhanced storminess. The storms reinforce the cooling by driving stronger heat losses and modulating the surface flow. Consistent with this mechanism, past freshwater events have been followed by cold anomalies in winter of ~‐2°C and increases in the North Atlantic Oscillation index of up to~0.6 within 3 years. We expect that future freshwater discharges into the North Atlantic will amplify the cold anomaly and trigger an enhanced wintertime storminess with far‐reaching climatic implications. |
领域 | 气候变化 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/276592 |
专题 | 气候变化 |
推荐引用方式 GB/T 7714 | M. Oltmanns,J. Karstensen,G. W. K. Moore,et al. Rapid cooling and increased storminess triggered by freshwater in the North Atlantic[J]. Geophysical Research Letters,2020. |
APA | M. Oltmanns,J. Karstensen,G. W. K. Moore,&S. A. Josey.(2020).Rapid cooling and increased storminess triggered by freshwater in the North Atlantic.Geophysical Research Letters. |
MLA | M. Oltmanns,et al."Rapid cooling and increased storminess triggered by freshwater in the North Atlantic".Geophysical Research Letters (2020). |
条目包含的文件 | 条目无相关文件。 |
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