Abstract
AbstractThe surface-amplified winter warming over the Arctic Ocean is accompanied by a pronounced intensification of near-surface winds, simulated by climate models and emerging in reanalysis data. Here, the influences of sea-ice decline, wind changes aloft, and atmospheric stability are revisited based on CMIP6 historical and high-emission scenario and ERA5 reanalysis data. Spatial trend patterns suggest that near-surface wind intensification over the inner Arctic Ocean in winter is largely driven by an increasing downward momentum transfer due to a weakening atmospheric stratification. In contrast, a near-surface wind intensification in summer appears to be largely driven by accelerating winds aloft, amplified in a high-emission future by decreasing surface roughness due to sea-ice decline. In both seasons, differences in near-surface wind-speed trends are closely linked to atmospheric stability trends. Models suggest that by 2100 the lower troposphere may become as unstable in winter as in summer, implying a fundamental regime shift of the Arctic winter boundary layer.
Funder
Bundesministerium für Bildung und Forschung
Publisher
Springer Science and Business Media LLC
Reference55 articles.
1. Trenberth, K. et al. Observations: surface and atmospheric climate change. In: Solomon, S. et al. (eds.) Climate Change 2007: The Physical Science Basis. Contribution of Working Group 1 to the 4th Assessment Report of the Intergovernmental Panel on Climate Change (Cambridge University Press, 2007).
2. Serreze, M., Barrett, A., Stroeve, J., Kindig, D. & Holland, M. The emergence of surface-based arctic amplification. Cryosphere 3, 11–19 (2009).
3. Arctic Monitoring Assessment Programme (AMAP), N., Oslo. Snow, water, ice and permafrost in the arctic (swipa), 269 pp (2017).
4. Rantanen, M. et al. The arctic has warmed nearly four times faster than the globe since 1979. Commun. Earth. Environ. 3, 168 (2022).
5. Screen, J. & Simmonds, I. Increasing fall-winter energy loss from the arctic ocean and its role in arctic temperature amplification. Geophys. Res. Lett. 37 https://doi.org/10.1029/2010GL044136 (2010).
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