Understanding the stratospheric response to Arctic amplification ...
<!--!introduction!--> Recent studies propose that Arctic sea ice loss and associated warming influence wave propagation into the stratosphere, affecting the winter polar vortex. Through stratosphere-troposphere coupling, this may perturb the winter jet stream and affect surface weather. But th...
| Main Authors: | , , , , , |
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.57757/iugg23-1511 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018098 |
| Summary: | <!--!introduction!--> Recent studies propose that Arctic sea ice loss and associated warming influence wave propagation into the stratosphere, affecting the winter polar vortex. Through stratosphere-troposphere coupling, this may perturb the winter jet stream and affect surface weather. But the “stratospheric pathway” linking Arctic variability to midlatitude weather extremes is not well understood. For example, studies such as the Polar Amplification Model Intercomparison Project (PAMIP) have not found a robust stratospheric response to Arctic sea ice loss, in strength nor sign. Here, we use an idealised atmospheric modelling framework (Isca) to better understand mechanisms and uncertainties in the stratospheric polar vortex response to Arctic amplification. We use Newtonian relaxation of temperature to a specified equilibrium temperature to simulate northern hemisphere winter, and force the model with an adjustable polar heating. Consistent with previous work, the vortex weakens in response to the ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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