Jet stream waviness response to Polar warming on an aquaplanet ...
<!--!introduction!--> The surface temperature at high latitudes — especially in the Arctic — has warmed faster than the global mean temperature since the 1990s. This process, called Polar amplification, is expected to continue this century. Concurrent with Polar amplification, upper tropospher...
| 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/iugg23-1899 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5017664 |
| Summary: | <!--!introduction!--> The surface temperature at high latitudes — especially in the Arctic — has warmed faster than the global mean temperature since the 1990s. This process, called Polar amplification, is expected to continue this century. Concurrent with Polar amplification, upper tropospheric Tropical warming is projected in the 21st century. Low-level Polar and upper-level Tropical warming influence the equator-to-pole temperature gradient in opposite ways and hence the mid-latitude jet stream. However, the effect of modified equator-to-pole temperature gradients is not fully understood. Earlier studies argued that low-level Polar warming causes a weaker and wavier jet stream. Here, we study the influence of Polar warming on the jet stream speed, position and its waviness by increased SSTs. We performed four idealised aquaplanet simulations with the Open Integrated Forecast System. First, we compared the jet stream intensity and position of the control simulation with the warmed simulations. ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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