tag:blogger.com,1999:blog-4572286363399496963.post2543277635345089752..comments2024-03-28T07:09:59.093-08:00Comments on Deep Cold: Alaska Weather & Climate: September TemperaturesRickhttp://www.blogger.com/profile/03946704894714514716noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-4572286363399496963.post-24028271284835365602015-09-25T17:45:39.710-08:002015-09-25T17:45:39.710-08:00Andy, I've often observed the different trends...Andy, I've often observed the different trends in autumn, but haven't specifically tied this to the seasonally varying effects of PDO phase. It would be interesting to dig a bit deeper on that.<br /><br />Here's a previous analysis of seasonal trends:<br /><br />http://ak-wx.blogspot.com/2014/09/fairbanks-temperature-trends.html<br />Richard Jameshttps://www.blogger.com/profile/08313902028896263276noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-20218080165569495032015-09-25T17:39:14.504-08:002015-09-25T17:39:14.504-08:00Gary, I'll include cloud cover when we do a po...Gary, I'll include cloud cover when we do a post-mortem on September. It will be interesting to see how the month's final mean temperature compares to normal.<br />Richard Jameshttps://www.blogger.com/profile/08313902028896263276noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-60725746276293442872015-09-25T17:37:23.412-08:002015-09-25T17:37:23.412-08:00Eric, I imagine you're right: the August SST p...Eric, I imagine you're right: the August SST patterns tend to persist and then influence the circulation anomalies in September. It is often difficult to isolate cause and effect in these things, but oceanic patterns are certainly more persistent than atmospheric anomalies.<br />Richard Jameshttps://www.blogger.com/profile/08313902028896263276noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-55369472591251268042015-09-25T11:58:22.515-08:002015-09-25T11:58:22.515-08:00I recall an analysis of the post-1977 PDO shift th...I recall an analysis of the post-1977 PDO shift that illustrated how autumn in Alaska did not show the same warm anomalies as other seasons, and some first-order stations actually showed cooler fall weather in the 80's and 90's when compared to the long-term mean. It might have been John Papineau or someone else at NWS who put that together. Andy Ahttp://www.ryanalaska.comnoreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-39237728179542332972015-09-24T22:31:15.745-08:002015-09-24T22:31:15.745-08:00Examine cloud cover for September 2015 as well.
G...Examine cloud cover for September 2015 as well.<br /><br />GaryNL7Yhttps://www.blogger.com/profile/15874712728971005352noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-47921446147396723582015-09-24T20:26:54.393-08:002015-09-24T20:26:54.393-08:00My suspicion is that the sea temps set up a large ...My suspicion is that the sea temps set up a large spread trough or ridge that influence where the jet stream is. This in turn forces the cold air to move away from Alaska or into it. An analysis of the winds and specifically the jet stream might bear this out.Eric Lundellhttps://www.blogger.com/profile/17914784378747801359noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-42735093301350647732015-09-24T20:26:01.856-08:002015-09-24T20:26:01.856-08:00My suspicion is that the sea temps set up a large ...My suspicion is that the sea temps set up a large spread trough or ridge that influence where the jet stream is. This in turn forces the cold air to move away from Alaska or into it. An analysis of the winds and specifically the jet stream might bear this out.Eric Lundellhttps://www.blogger.com/profile/17914784378747801359noreply@blogger.com