tag:blogger.com,1999:blog-4572286363399496963.post8213200269858113086..comments2024-03-28T07:09:59.093-08:00Comments on Deep Cold: Alaska Weather & Climate: Pacific Temperature PatternsRickhttp://www.blogger.com/profile/03946704894714514716noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-4572286363399496963.post-35067533754115542482015-08-11T19:07:57.243-08:002015-08-11T19:07:57.243-08:00Blob Blog: https://alaskapacificblob.wordpress.com...Blob Blog: https://alaskapacificblob.wordpress.com<br /><br />GaryNL7Yhttps://www.blogger.com/profile/15874712728971005352noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-42803859720280795862015-08-09T08:43:22.810-08:002015-08-09T08:43:22.810-08:00Thanks for the questions, Eric - I'll hope to ...Thanks for the questions, Eric - I'll hope to address them in more detail with future posts. There's a lot more analysis to be done with these handy EOFs. It certainly would be interesting to look at where the PDO phase changes show up.<br /><br />Yes, I followed Hartmann as closely as I could to obtain the EOFs and corresponding coefficients.<br /><br />FYI I'll be on the road again this week, so it will probably be quiet here again.<br />Richard Jameshttps://www.blogger.com/profile/08313902028896263276noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-44640909789766831032015-08-08T19:14:11.293-08:002015-08-08T19:14:11.293-08:00Thanks for all this work. Now I know what has kep...Thanks for all this work. Now I know what has kept you busy. <br /><br />You didn't mention how you got the EOF values that you regressed against. The cited paper shows a time series example of the three EOF values from 1980 to 2014. I assume you did something similarly.<br /><br />The cited paper also mentions that the data suggests that tropical SST forcings don't affect the PDO and Blob directly. Instead, the ENSO affects atmospheric circulations which then modulate the North Pacific SSTs. I find this type of ocean/air feedback to be interesting.<br /><br />Is it possible that the Blob is setting up some blocking patterns that are forcing warm air away from Alaska and not towards. This is why it has a cooling (negative) effect.<br /><br />I'm intrigued by the uniqueness of January. This accords with experience but it still is interesting. Maybe the different relevancy of ENSO vs PDO explains why Dec and Feb behave so different from Jan.<br /><br />If you compared the EOFs from before the PDO change of 1977 and after, is there a difference? Are these values significant? Can we see the influence of PDO more clearly? The cited paper's time series example shows that El Nino pops up as expected but that both PDO and EOF3 have both been depressed since 1977.<br /><br />Thanks again for this thought provoking post. Eric Lundellhttps://www.blogger.com/profile/17914784378747801359noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-40307894265877447692015-08-08T19:11:51.428-08:002015-08-08T19:11:51.428-08:00Thanks for all this work. Now I know what has kep...Thanks for all this work. Now I know what has kept you busy. <br /><br />You didn't mention how you got the EOF values that you regressed against. The cited paper shows a time series example of the three EOF values from 1980 to 2014. I assume you did something similarly.<br /><br />The cited paper also mentions that the data suggests that tropical SST forcings don't affect the PDO and Blob directly. Instead, the ENSO affects atmospheric circulations which then modulate the North Pacific SSTs. I find this type of ocean/air feedback to be interesting.<br /><br />Is it possible that the Blob is setting up some blocking patterns that are forcing warm air away from Alaska and not towards. This is why it has a cooling (negative) effect.<br /><br />I'm intrigued by the uniqueness of January. This accords with experience but it still is interesting. Maybe the different relevancy of ENSO vs PDO explains why Dec and Feb behave so different from Jan.<br /><br />If you compared the EOFs from before the PDO change of 1977 and after, is there a difference? Are these values significant? Can we see the influence of PDO more clearly? The cited paper's time series example shows that El Nino pops up as expected but that both PDO and EOF3 have both been depressed since 1977.<br /><br />Thanks again for this thought provoking post. Eric Lundellhttps://www.blogger.com/profile/17914784378747801359noreply@blogger.com