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| Source: Joint Typhoon Warning Center |
The current track forecast has it turning clockwise, brushing by Taiwan and then moving across Okinawa. Little wonder why the US Navy and Pacific Air Forces are so concerned about typhoons.
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| Source: Joint Typhoon Warning Center |
It is pretty common for tropical cyclone remnants to move across the North Pacific and undergo reintensification (a process known as extratropical transition). Many move into the high latitudes. What role do these events play in the climate of Alaska and the Arctic? This strikes me as a potentially interesting avenue of research. Some relevant discussion of major events from weather historian Christopher Burt is available here.
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ReplyDeleteInteresting thought, you would think that if you had a string of strong ETs in the western Pacific (or even the Atlantic to some degree), that the Arctic would warm due to the constant injection of a warm tropical airmasses. However, the bigger question which I think you are are getting at is what kind of temporal scale are we talking about for such a warming? I.E are we talking warming for a few days, or weeks or even months!... Perhaps doing a correlation between the number of strong ETs in a season and the arctic sea ice extent (or 500-hPa height anomalies, 850-temp. ect ect..) for the following months would reveal this answer! Granted, there are probably other processes that can be attributed to a decline in the arctic sea ice extent as well so conclusions would have to be made carefully...
ReplyDeleteAnother potential side effect is that there could be additional fluxes of warmer tropical air from the downstream development or wave amplification that is often cause by such systems (I.E you will have stronger meridional flow from a more amplified wave pattern).