Improving Understanding of Arctic Oscillation and Its Impact on Weather and Climate

Dear Colleagues,

The Arctic is important in the climate system, host to key atmospheric and oceanic processes and feedbacks. It plays an essential role in the climate system due to its interaction with the mid-latitudes of Northern Hemisphere through the atmospheric teleconnection. Arctic oscillation (AO), which depicts a most dominant large-scale seesaw between the mid-latitudes and Arctic atmospheric mass, can exert substantial influences on the weather and climate over many parts of the world (e.g., Eurasia, North America, eastern Canada, North Africa, the Middle East, and even the tropics and the Southern Hemisphere). Previous studies have revealed that AO has a close relationship with the variability of Arctic sea ice, Polar vortex, East Asian monsoon, atmospheric blocking, jet stream, etc. Though great efforts have been devoted to investigating the mechanisms underlying the AO and its climate impacts since it was found in the late 1990s, it is clear that the rapid climate change in the Arctic (e.g., Arctic sea ice reduction and amplified Arctic warming) in recent decades and in the future calls for further studies in this field. For instance, recent winters have frequently seen extremely cold temperature events at mid-latitudes, which can be tracked back to the Arctic in the observations. This Special Issue will focus on research in the variability of AO and its impact on weather and climate in the past, present, and future.

This Special Issue aims to contribute to a more thorough understanding of AO and its impact on weather and climate. We invite contributions that involve large-scale atmospheric circulation variability and change at mid- and high latitudes, as well as the causes for the anomalous weather and climate with the compilation of research papers in AO. Submissions in, but not limited to, the following research areas are welcome for this Special Issue.

• Observed case study in the evolution of AO;
• Prediction and projection on the variability of the AO;
• Relationship between the Arctic sea ice and AO in past, present, and future;
• Impacts of AO on climate and weather extremes;
• Interdecadal changes in the impact of AO on the climate and weather in the past and the underlying mechanisms;
• Future projections of AO influence on weather and climate;

Interactions between the AO and the climate systems over the tropics and Southern Hemisphere.

Dr. Shengping He
Prof. Dr. Yongqi Gao
Dr. Shangfeng Chen
Guest Editors

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