Journal cover Journal topic
Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2018-127
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
04 Apr 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
Contributions from intrinsic low-frequency climate variability to the accelerated decline in Arctic sea ice in recent decades
Lejiang Yu1 and Shiyuan Zhong2 1SOA Key Laboratory for Polar Science, Polar Research Institute of China, Shanghai, China
2Department of Geography, Environment and Spatial Sciences, Michigan State University, East Lansing, MI, USA
Abstract. In recent decades, the Arctic sea ice has been declining at a rapid pace as the Arctic is warmed at a rate of twice the global average. The underlying physical mechanisms for the Arctic warming and accelerated sea ice retreat are not fully understood. In this study, we apply a relatively novel statistical method called Self-Organizing Maps (SOM) to examine the trend and variability of autumn Arctic sea ice in the past four decades and their relationships to large-scale atmospheric circulation changes. Our results show a large portion of the autumn Arctic sea ice decline between 1979 and 2016 may be associated with anomalous autumn Arctic intrinsic atmospheric modes. The Arctic atmospheric circulation anomalies associated with anomalous sea surface temperature patterns over the North Pacific and North Atlantic influence Arctic sea ice primarily through anomalous temperature and water vapor advection and associated radiative feedback.
Citation: Yu, L. and Zhong, S.: Contributions from intrinsic low-frequency climate variability to the accelerated decline in Arctic sea ice in recent decades, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2018-127, in review, 2018.
Lejiang Yu and Shiyuan Zhong
Lejiang Yu and Shiyuan Zhong
Lejiang Yu and Shiyuan Zhong

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Short summary
The Arctic sea ice has been declining at a rapid pace in recent decades, which has been attributed largely to global warming. Using a relatively novel statistical method called Self-Organizing Maps (SOM), we show that a large portion of the autumn Arctic sea ice decline in the past four decades may be explained by atmospheric circulation anomalies associated with anomalous sea surface temperature patterns over the North Pacific and North Atlantic through Ocean-atmosphere interactions.
The Arctic sea ice has been declining at a rapid pace in recent decades, which has been...
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