tag:blogger.com,1999:blog-4572286363399496963.post8916575092882405077..comments2024-03-28T07:09:59.093-08:00Comments on Deep Cold: Alaska Weather & Climate: Daily Temperature Departures: 2004-2013Rickhttp://www.blogger.com/profile/03946704894714514716noreply@blogger.comBlogger7125tag:blogger.com,1999:blog-4572286363399496963.post-64135744187686205122014-08-30T20:22:41.494-08:002014-08-30T20:22:41.494-08:00I-Macs do it ok to.
GaryI-Macs do it ok to.<br /><br />GaryNL7Yhttps://www.blogger.com/profile/15874712728971005352noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-25918733973200900132014-08-28T11:42:22.570-08:002014-08-28T11:42:22.570-08:00I added a section at the end of the post with a zo...I added a section at the end of the post with a zoomable statewide departure from normal chart using the Highcharts Javascript API. It works on my Windows-based PC and my Android-based phone. I cannot vouch for Apple-based products though.Climatologist49https://www.blogger.com/profile/04560505931210357679noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-59326695104967731112014-08-28T09:18:27.573-08:002014-08-28T09:18:27.573-08:00Thanks for the question Jim. The coincidence that ...Thanks for the question Jim. The coincidence that I refer to is unusual number of extreme periods that seem to start and end at the same time that a new month begins and ends. Take January 2012 in Anchorage for example. The extreme cold of January 2012 began on December 29, 2011 and ended on January 30, 2012. The month of January was 14 degrees below normal and the second coldest on record. If that cold snap started and ended 7 days later, January 2012 would have been 9 degrees below normal and might fall outside the Top 10 coldest Januarys. Four different months in 2013 had a similar situation as January 2012 and three months in 2011. Again, it is more of a statistical curiosity in my opinion but it magnifies monthly departures from normal even if the annual departures are pretty benign.<br /><br />By the way, Rick suggested that we touch base regarding possible mapping collaboration. If you have a chance please send me an e-mail at: bbrettschneider@outlook.com Climatologist49https://www.blogger.com/profile/04560505931210357679noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-8564998834418071282014-08-28T08:26:43.767-08:002014-08-28T08:26:43.767-08:00Very interesting. Maybe the old "January thaw...Very interesting. Maybe the old "January thaw" is now the February thaw. <br /><br />You said " In the case of February, it seems to warm up dramatically around the 1st or February every year. Of course it is just a coincidence but it sharpens the peaks and troughs on the charts." What do you mean by that? Just a coincidence that this warming has tended for the last 10 years to come close to the same time on many of the years, or that that time coincides with the first of the month? Jim Greenhttp://williwaw.comnoreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-35776899634687137082014-08-28T07:51:41.219-08:002014-08-28T07:51:41.219-08:00Eric, here is a quick time series chart of all Ala...Eric, here is a quick time series chart of all Alaska temperature anomalies from 2002 to present. It is a 7-day running average. I stitched them together as a long strip so it is a big image (1.6 Mb). http://www.borealisscientific.com/data/TempDepart_2002_2014.pngClimatologist49https://www.blogger.com/profile/04560505931210357679noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-18836070234220098182014-08-27T20:55:09.939-08:002014-08-27T20:55:09.939-08:00The consistency of the regions tells me that it is...The consistency of the regions tells me that it is a state-wide advection of warmer southerly air that creates the warmer temps. I would also agree that the North Slope has the higher anomalies in October and November because of the lack of sea ice in addition to the warmer advection. I would estimate that about 1/2 of the warmth is from the reduced ice.<br /><br />I remember a couple of years ago that there was a newspaper piece about that winter's weather having 30 day periods alternating between way warm and too cold. It was very apparent. The reported meteorologist said it was due to the jet stream being blocked by some blocking highs in Greenland or something. This brings up the question: is there any Rossby or other planetary waves that have a 30 day period that could be filtered in by current global conditions? Actually, wasn't there some discussion about this on this blog a few months ago?<br /><br /><br />And lastly, how much of the anomalies is influenced by individual years? Could last October have overwhelmed the signal since it was statewide?Eric Lundellhttps://www.blogger.com/profile/17914784378747801359noreply@blogger.comtag:blogger.com,1999:blog-4572286363399496963.post-75022492635509276612014-08-27T06:23:42.812-08:002014-08-27T06:23:42.812-08:00Brian, This is an excellent follow-up, thanks. It...Brian, This is an excellent follow-up, thanks. It's very interesting to see that the October anomalies are nothing special compared to the magnitude of anomalies at other times of year. Also interesting is the fact that October warming has been observed down in the Bristol Bay division. I think this may point to synoptic-scale circulation changes as being at least as significant as the warming from reduced ice, except for the North Slope (presumably)... this supports Gary's and Eric's contention that it's not all about the ice. I'm working on more analysis to examine this further.<br /><br />The monthly anomaly flips are an interesting curiosity. One wonders if there are decadal-scale regimes of calendar date dependency that could be used to enhance subseasonal forecasting. In other words, does the recent Feb 1 warming trend make it more likely that the same thing will happen next year, or is it truly random?<br />Richard Jameshttps://www.blogger.com/profile/08313902028896263276noreply@blogger.com