Winter 2020 breaks 8 Omicron circulation cycle

~Major circulation pattern forces in a distinct climate result for spring summer 2020

~Similar in nature to spring summer 2019 weather

~Implying lots of rain,  as if it will be a surprise for Midwest North America and NW Europe

~8 Omicron pattern was noticed especially after 2012

~2020 breaks the cycle namely for Alaska-CCA-Midwest N.A. and NW Europe 2019 weather

 Introducing the 8 Omicron Arctic Polar Vortex pattern,  pay attention to 2012-13,  2014-15, 2016-17, 2018-19 morphology or the shape of the Vortex perimeter:

   8 Omicron mid-winter circulation pattern, 8 in shape for 2012, 14, 16 and 18, Omicron pattern 2013, 15,17, 19 and 20. From NOAA daily composites 600 mb temperatures (600 mb is the pressure level representing the average temperature of the entire atmosphere, 248 Kelvin, -25 C,  is where the Northernmost  jet stream can most likely exist).   It is a Ying Yang cycle, largely caused by gradual warming Oceans and Arctic sea ice minima melts and maximum reformation (cousin of warming oceans), especially considering lost sea ice volumes as the years went by.   Big news:  2019 2020 Vortex periphery  looks similar to each other,  despite 2019 being a significant melt summer.  I suggest the latest 2020 pattern is due to CTNP consolidating Northwards,  because the Vortex is getting smaller year by year.  This latest Omicron Omicron 2019-2020 vortex pattern,  infers 2020 being much like 2019,  except for Alaska being colder and being largely within the Vortex (colder) , not as it was largely out (warmer) every winter since 2012.  Refraction optical method monitoring the Western Canadian Arctic Archipelago should indicate how unique or split in two the Cold Temperature North Pole (s) will be.

     Meantime,  your wet soggy weather can be largely attributed to Omicron pattern whipping ocean air  straight onto the Western continental coasts,  as opposed to 8 shapes seasons diverting the Eastern oceans moistures and warmth Northwards.   Early prognosis for 2020:  hope you the enjoy more rain if you are East and West coasters,  the Ying and Yang of moisture,  mainly a consistent Pacific flow  joining the Atlantic Gulf stream making dry spots only within central continents  ....  WD February 21, 2020

Now that is strange, really different Arctic circulation patterns countinue

~Winter 2019-20 High Arctic circulation sharply deviates from preceding 8 years
~It means the sea icescape,  despite extent gains,  is really different

  February 11, 2020 NOAA animation loop courtesy CMC.    Yes a Cyclone from the Atlantic is heading to the Pacific straight from East to West.  Because the CTNP,  the North American Cold Temperature North Pole vortice is well South of the Canadian Arctic Archipelago.   Is quite warm over Ellesmere Island at present compared to further South.  Even though Ellesmere is still plunged in 24 hour darkness.   All in all, 19-20 winter is no recent year pattern repeat.  This feature announces more strangeness to come.  WD Feb 11,2020 

Spectacular Surface Cyclone with no clouds was really a CTNP vortice

~ Arctic Winter 2019-2020 has a smaller Polar Vortex with many Polar vortices, with centers West of CAA, NE Siberia and even Alaska

~The Western Canadian Arctic Archipelago Cold Temperature North Pole vortice was quite spectacular:

  At times defined as a Low or High surface pressure, the extreme white Zone at the Western shores of Arctic Archipelago was the long lasting CTNP vortice of this region.  Where surface temperatures have easily attained near -45 C.  This is a continuance of smaller Polar Vortex geophysics.  CMC January 29-30  2020 IR loop portray the simultaneous encroachment of much warmer clouds moving quite fast while appearing being pulled around extreme cold air.   The combination of many vortices within the smaller in extent Polar Vortex created mainly above normal temperatures in populated areas of the Northern Hemisphere with the occasional spike of cold freakish weather as a result from rogue vortices,  which have been triggered by strong moving Northwards cyclones elongating the P.V. Southwards .  WD February 1, 2020

Coldest New Years Eve Cold Temperature North Pole in Meteorological history, since 1948

~Resulting from stable weather exacerbated and surrounded by a much warmer atmosphere
~First observed in spring 2017 by refraction sun disk method
~A surrounded shrunken by greater heat Polar Vortex gives deeply cold vortices.

     December 31 2019,  with Polar Vortex off center weighted temperature measuring -48 C CTNP over Ellesmere Island, the coldest such air ever measured for this date,  surpassing all others by 4 degrees C (1948-2018).

In Purple, deeply frozen weighted atmosphere using 600 mb, the rough altitude giving the average temperature of the entire troposphere.  Note the near proximity to much warmer air,  by +23 C, within a mere few hundred kilometers,   a feature of this phenomena.  In the past,  same date CTNP's were more Polar Vortex centric.  This amazing phenomena coexists with a much warmer Northern Hemisphere atmosphere.  With Jet Stream in some sectors way Northwards, at some locations brought Southwards by lower pressure found in huge cyclones.   Without Low pressure systems,  the outline of 600 mb at -25 C would be roughly the Northern end of the Jet Stream.  This small but impressive -48 C CTNP vortice is about 20 C colder than normal for this time of the year, compared to all other years since NOAA daily composite allows,  1948,  this region is the coldest New Years Eve in recorded history.  

The best way to explain this is to balance the presence of much warmer air, being onto itself more stable, especially during anthropogenic enhanced global warming days,  with a significantly smaller region of much colder air.  A weather stable region in darkness or with very low sun, is bound to get very cold,  because it is isolated, does not have a lot of heat input. This Ellesmere Island CTNP  is a continuance of the same one which was further to the West 3 or 4 days ago,  a cold vortice tends to place itself wherever ideal radiative cooling exists with very little heat advection or convection (from snow laced lands rather than thinner sea ice).   WD January 3, 2020

Christmas 2019 Polar Vortex shrinkage North American side; RECORD WARMING follows, how did this happen?

~From Chicago USA: https://chicago.suntimes.com/news/2019/12/28/21039824/warm-christmas-chicago-climate-change-great-lakes

~To even Moscow: https://www.theguardian.com/world/2019/dec/29/moscow-resorts-to-fake-snow-in-warmest-december-since-1886

~The root cause,  of course, was a warmer Arctic,  with likewise much smaller size Polar Vortex

     We go strait to the root cause:

  The size of the Polar Vortex on December 25-26  may be defined at 248 K isotherm threshold at level 600 mb.   As you can see the vortex is spectacularly small and covers even less ground over North America.    It has 3 vortices,  all quite cold, as per latest observations, the warmer the Arctic gets the more prone for small but very cold PV vortices.  Obviously there is no or very little circulation originating from the entire sub Arctic towards North America and western Eurasia.  How did it get this way?

      This was from a build up of unusual Arctic circulation pattern  covered here at EH2r since late November.     Namely by cyclones heading North from the West side of Greenland. 
Here was one of the last significant warm air blitz:

The recent Polar Vortex was not always shrunken,  December 19 to 25 action demonstrates one of the latest warm cyclones bringing up air from the West coast of Greenland,  all the way to Northern Siberia by way of the North Pole.  The culprit here is the Western Canadian Arctic CTNP (Cold Temperature North Pole),  a vortice of the vortices within the Polar Vortex.  Like a hurricane eye,  this vortice has been reorganizing according to the massive warm advection,  it could only reposition itself westwards,  within a much warmed,  hence shrunken PV as seen on my first NOAA daily composite animation presented above.    This shape of the Polar Vortex took place after several Baffin Bay cyclones headed Northwards likewise.  The sum total is a shrunken PV,  reorganized in similar way as before,  with a CTNP always prone in injecting more warm air in addition to the usual North Pole warming route,  from the North Atlantic.   Of particular interest is the weather of Japan, which will likely vary greatly from rainy warm days to Siberian cold in the matter of a few hours,   I have yet seen something which will break the current circulation pattern,  it seems quite stable,  but thinner sea ice may eventually reshape PV dynamics within 2 weeks. WD December 29,  2019

Pacific air meets Atlantic clouds over the Pole

~North American  Polar Vortex Cold Temperature North Pole (its coldest vortice) did indeed move West
~Making for unusual weather, where cold mixed with Pacific moisture created Havoc regularly

We can see the brief outline of the North American CTNP over the Western Canadian Arctic Archipelago, NOAA CMC IR captures,   December 20 and 22.  Everything turns counter clockwise around it,  storms,  clouds and cyclones.  Which brings Northwards Pacific moisture to meet with North of Greenland Atlantic clouds very near the North Pole.  This CTNP has been severely weakened in a day,  the subject of coming next article.  WD December 22 , 2019

WARMING the Polar Vortex makes its internal vortices COLDER

~Dawn of winter 2019 looks as extreme as ever
~The coldest zone at start of winter since 2012 was 2016
~Yes,  the warmest year in history twinned with greatest El-Nino

     A continuance of warmer global temperatures creates smaller but much colder Polar Vortex internal vortices.

   The way to show this is by taking the ENSO cloud seeding theory,  which means there are more clouds during El-Ninos worldwide, either in summer or winter.   More clouds in Arctic winter definitely turns it warmer,  so was the great El-Nino of 1998 the turning point for Arctic sea ice extent , the beginning of its significant declining trend.    The  feedback of yearly ever increasing lesser sea ice areas should not be underestimated,  must remind: long in duration La-Nina's are destructive for sea ice, especially since 1999,  sea ice also plays a major role in world wide climate at either Poles.

     NOAA ENSO sst graph directly suggests the world is warming markedly because La-Nina's rebound from 2016 warmest El-Nino did not happen!  Hence cloudier Arctic summers since 2012.  But looking at peak warm/cold years reveals not only sea ice trends, but Global Circulation (GC) trends.  Obviously there wasn't the same mass of sea ice to counter 2016's warming.  2007 and 2012 summer sea ice historical all time melts were La-Nina driven,   not really counter intuitive because less clouds in summer Arctic spelt doom for robust very thick sea ice.  At any rate we look at warm years El-Nino 1998, 2003, 2010 and 2016, and cold La-Nina years 1999, 2007, 2011 and 2017.

Note, declining sea ice mangles ENSO's global circulation role year by year as sea ice volume and extent vanishes, it gives quite the interesting start of winter GC look,  note a couple of days at the dawn of winter are very significant if looked holistically,  a wide expanse of planet Earth is in effect an average compared with identical same day periods, long term averaging dilutes the GC outlines :

                             WARMER                                                              COLDER


      Consider the extent of Polar Vortex within the orange zone (the jet stream line), astounding as you may notice,  600 mb temperatures are very close to the weighted temperatures of the entire troposphere, but the coldest temperatures measured at beginning of winter were mostly during the warmest years, especially 2016, the warmest year.  Warmest years December 13-14's had much smaller jet stream outline (-25 C,  248 Kelvin border), colder years had naturally a vaster expanse of colder air but,  this is a big but,  mainly much warmer internal vortices.   Warmer years had mainly top of sea ice great warming incursions,   Cold Temperature North Poles (CTNP) were closer to the North Pole during colder years.

   The easy question is:  what causes this?  Refraction observations of vertical sun disk expansions or compressions have confirmed this phenomena.  During the last two springs, 2019 and 18,  the Canadian Arctic Archipelago Vortice (english language needs adjust to the times) was found radically colder but smaller.    Dark season long term observations rendered tentative conclusions,  the Cold Temperatures North Poles have largely migrated Southwards, away from lesser and thinner sea ice,  snow on ground species have tended to be more of the "wet" snow type,  more sublimation and mostly there seems to be a tendency for more stable but smaller cloud free zones,  which tend to be in a deep freeze feedback loop.

   What about 2019-20 winter:
 

   Same days dawn of winter look:  a vast tropospheric expanse over  the Arctic Ocean is warmer, the CTNP's are to the South,  meaning?  Rogue vortice formations much within populated areas, wild weather, warm to deep freeze merry go round all winter.  WD December 16, 2019

Significant "additional" cooling after snowfall event depends on the type of snowflakes

~Refraction method observed in the Arctic revealed an important facet with respect to after snowfall surface temperatures.
~The method confirms that T*** top of snow temperature is colder when the snow layer snowflakes are larger.
~ This lingered well afterwards even when the clouds persisted,  a quite specific and peculiar key observation
~In this situation of bigger snowflakes within the carpet, when the clouds clear even a little,  surface temperatures dropped really fast, only to warm quickly as soon as cloudier not necessarily overcast conditions returned.

   During the Arctic long night we have the luxury of darkness eliminating sun ray heat effects.  After a period of  unusually large snow flakes we can literally precisely measure if different flakes cause temperature variations. Unlike snow beds in sunnier climes,   most flakes remain buried in place for the duration of winter,  as long as from October till June.  When the precipitation occurred,   Resolute Bay  October 2019 was likely the warmest in history,  it was mainly extensively cloudy and so with clouds there was very little chance for the  usual cooling clear skies triggering the start of winter.  Hence,  beginning of October had a lot of snow usually called "wet",  they  create a weaker density layer, compact less in the winds as can ice crystals or very small "colder" snowflakes do.   After weeks on ground, they are only readily identifiable by walking over the snow pack, causing while walking intense sinking with every step.   Measuring T*** with high precision thermistor revealed a marked cooling as compared with previous years.  Onto itself this cooling can affect the local refraction horizon and it did:

Twice confirmed,  with 2018 in blue,  2019 in red.  Top 2 bars, the average local horizon height was significantly higher in 2019 compared to 2018 same period.  2nd series from top, the average temperature difference between surface temperature (Ts) and top of snow layer (T***)  was greater in 2019 by +0.4 C.  3rd group down, average temperature readings at 2 meter height was colder in 2019 than 2018.  Finally bottom bars average T*** in 2019 was equally colder than 2018.   Measurements were done between October 5 and November 30 2019.  Greater sublimation of snow is the suspected causation.

      To sum it up,  the greater the positive temperature difference between Ts and T*** ,  the stronger the refraction,  observed by the horizon mainly appearing higher.  In other words,  a "wetter" snow bed causes more sublimation,  hence steeper cooling at the interface between snow and air.   Remember this sublimation cooling occurred in the Arctic long night, no sun, solar rays would exacerbate the sublimation,  which infers much more cooling.     The temperatures taken, with respect to the graph above were done nearly simultaneously with the refraction observations.  This is important, these temperatures are not daily averages,  which would require 24 near simultaneous refraction observations.

    A very difficult observation is to contrast top of drift snow pack (left) with 30 cm below (right).  The  bottom snow layers are much less dense.   But appear the same in a cross section scope,  however placed on a slab with 5X magnification the top layer primarily appears as  ice crystals while
the bottom "wet" snow in origin semi compacted has fewer ice crystals.  Yet the best way
to judge the differing layers is to simply walk on snow, usually a well compacted snow carpet leaves a very shallow footprint as opposed to a less dense one,  the former is like walking on concrete,  the latter causes difficulty in walking.  WD December  8 2019. 

Arctic Resurrection Lows; Passing the Baffin Bay Cyclone cemetery once again.

~This is not a once in 100 years phenomena, it is repetitive
~Not odd given present Polar Vortex weakened construct and Baffin Bay sst being warm

From Jim Hunt's sea ice area (always good to go there):

Baffin Bay Sea ice area is meek,  compactness more terrible,  is now a heat source: 

sst in Baffin Bay is very warm

NOAA CMC capture November 28-30 IR Loop.This time we see a late November mainly cloud free Arctic Basin,  one month late.  Top of Arctic Ocean sea ice welcomed another Baffin Low pressure ,  what we see here  is unusual,  note the mega storm over Ellesmere Island as the Low whisked North over Nares Strait.  Also note the clouds on top of Greenland ice cap, irrefutable warming there.  

It is a main signature feature of this autumn.  The heat coming from Baffin Bay is so strong the Cyclone has plenty of fuel to subsist way Northwards than usual, we are very use to North Atlantic Lows heading North on the other side of Greenland though,  again this phenom marks a different coming winter general circulation.  WD November 30, 2019