tag:blogger.com,1999:blog-4572286363399496963.post4144244100120788315..comments2024-03-27T04:17:21.221-08:00Comments on Deep Cold: Alaska Weather & Climate: Upper Level Pattern LengthRickhttp://www.blogger.com/profile/03946704894714514716noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-4572286363399496963.post-64864954233990791902015-02-05T19:51:31.060-09:002015-02-05T19:51:31.060-09:00Yes, Excel is always my first option for analysis....Yes, Excel is always my first option for analysis. If there are too many records or I need to do some exotic stuff, I write a Java program.<br /><br />The graph in Figure 1 is the same one I used for the Upper Air Warmth post on January 11, 2015. No point in re-inventing the wheel. For both posts, I wanted to make sure readers knew that upper air departures from normal were computed against their appropriate 30-year climate normal period.<br /><br />As for PDO, I'll run some sort of correlation scatter plot and add a new image as an addendum. Probably tomorrow sometime.<br />Climatologist49https://www.blogger.com/profile/04560505931210357679noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-64770984522848713082015-02-05T19:45:07.760-09:002015-02-05T19:45:07.760-09:00I have not looked at seasonal differences but will...I have not looked at seasonal differences but will soon. One difficulty in a seasonal assessment is where to put the data point. If there is a 30-day warm period that spans from August 16 to September 15, does the point go in August or September – or both?Climatologist49https://www.blogger.com/profile/04560505931210357679noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-84202559084186442962015-02-05T19:24:57.869-09:002015-02-05T19:24:57.869-09:00Your using Excel for the calculations. Now that i...Your using Excel for the calculations. Now that is impressive!<br /><br />A graph similar to Figure 1 has been produced before. And I've commented before that the difference line looks like the seasonal temperatures have all been drifting back a few weeks causing a small phase change. It's almost like all of the seasons have been starting a little earlier.<br /><br />It seems in Figure 3 that times of positive PDO have shorter warm spells. Or maybe I'm reading it wrong. Maybe less stability means more systems to push spells away.<br /><br />I think the seasonal analysis that Richard wondered about would help answer all of these questions.Eric Lundellhttps://www.blogger.com/profile/17914784378747801359noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-73186721242286576892015-02-05T14:15:37.627-09:002015-02-05T14:15:37.627-09:00Nice work, Brian. By using the contemporary clima...Nice work, Brian. By using the contemporary climate normals, it seems you've eliminated the possibility that the change simply reflects the mean warming. So I wonder if we can say that overall climate anomalies are more persistent now.<br /><br />Did you look at the seasonal breakdown of changes? Would be interesting to know if summer or winter is more affected.<br />Richard Jameshttps://www.blogger.com/profile/08313902028896263276noreply@blogger.com