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Special Session 5: Ocean-atmosphere interaction, multi-scale climate variability and their implication for biogeochemical processes |
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Vertical structure of recent Arctic warming and the impact of blocking
SS5-07-S
Xianting Huang* , Ocean University of China
Dehai Luo, Institute of Atmospheric Physics
Presenter Email: huangxt@tea.ac.cn
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| Near-surface warming in the Arctic has been almost twice as large as the global average over recent decades—a phenomenon that is known as the ‘Arctic amplification’. It has been recognized that the Arctic amplification does not only take place in the lower layer of troposphere, but also in the upper layer. The underlying cause of the upper layer amplification of this temperature anomaly is unclear and has become an important question that needs to be further investigated now. This paper tries to pose a viewpoint that the upper-layer amplification of Arctic warming is closely related to the presence of blocking because the blocking has often an equivalent barotropic structure. This issue can be studied by including and excluding blocking events. As an example, we examine the impact of Ural blocking on the vertical structure of Arctic temperature anomaly. Keywords: Ural blocking, Arctic warming, troposphere, vertical direction |
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