Impact of Arctic sea ice loss on tropical cyclone genesis frequency over the North Pacific ...
<!--!introduction!--> Anthropogenic global warming generally has been shown to cause the rapid loss of Arctic sea ice in recent decades. However, whether this rapid loss has exerted significant impact on recent changes in tropical cyclone (TC) activity over the North Pacific remains unknown. H...
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| Format: | Conference Object |
| Language: | unknown |
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GFZ German Research Centre for Geosciences
2023
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| Online Access: | https://dx.doi.org/10.57757/iugg23-2418 https://gfzpublic.gfz-potsdam.de/pubman/item/item_5018324 |
| Summary: | <!--!introduction!--> Anthropogenic global warming generally has been shown to cause the rapid loss of Arctic sea ice in recent decades. However, whether this rapid loss has exerted significant impact on recent changes in tropical cyclone (TC) activity over the North Pacific remains unknown. Here, we first extract the leading mode of the rapid loss of Arctic sea ice concentration (SIC) averaged in July-October during 1950-2021, and then investigate the impact of this leading mode on long-term changes in TC genesis frequency over the western North Pacific (WNP) and the eastern North Pacific (ENP). Results show that the reduced SIC was favorable for more TC geneses over the whole ENP but led to fewer TC geneses over most of the WNP. Further analyses based on dynamical diagnosis and CMIP6 model data demonstrate that the rapid loss of Arctic SIC is responsible for local warming and weakened upper-tropospheric westerly over most of the Arctic. This triggers a teleconnection wave train over the upper ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ... |
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