From the INSTITUTE OF ATMOSPHERIC PHYSICS, CHINESE ACADEMY OF SCIENCES and the “it’s called weather” department.
In recent years, Arctic warming and extreme events have attracted widespread attention of the world. Recently, Dr. YAO Yao and Prof. LUO Dehai from the Institute of Atmospheric Physics investigated the impact of Ural blocking (UB) on Eurasian extreme cold events in response to Arctic warming and obtained some interesting findings.
The intensity, persistence of UB-related Eurasian cold anomalies, according to LUO and his collaborators from USA and Australia, depend strongly on the strength and vertical shear (VS) of the mean background westerly wind (MWW) over mid-high latitude Eurasia related to Barents and Kara Seas (BKS) warming. The large BKS warming since 2000 weakens the meridional temperature gradient, MWW and VS, which increases quasi-stationarity and persistence of the UB (rather than its amplitude), and then leads to more widespread Eurasian cold events and further enhances the BKS warming. LUO and his coauthors also examined the physical mechanism behind the observational result using an UNMI model.
Yao Yao
“The cooling over Central Asia occurs mainly during 2000-2015 and is related to the quasi-stationary and persistent UB,” said LUO, “the Northern Hemisphere winter warming hiatus observed in the recent decade (2000-2015) is likely associated with the quasi-stationary and persistent UB linked to the background Arctic warming or sea ice loss over the BKS. In particular, cold (warm) extremes are more persistent over Central Asia (BKS) for weak MWW or VS winters than for strong ones. ”
The study was recenlty published in Journal of Climate. http://journals.ametsoc.org/doi/10.1175/JCLI-D-16-0261.1
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General McArthur in the WW2 Pacific campaign said “hit ’em where they aint”.
Now the warmista warlords are doing the same, “warm it where they aint”.
It’s increasingly the pattern – never mind exceptional cold where billions of people live, the real story is all this warming where no-one is there, trust our few old decaying weather stations but don’t believe those evangelical satellites.
OT but funny 😂 :
http://www.bbc.com/news/av/world-europe-39939911/spectacular-scenes-after-lorry-and-wind-turbine-collision
Ural blocking (UB) can only be trivial compared with Rocky Blocking (RB?). I mean, hills, with an average elevation of a kilometer; are not even in the same league with the American Cordillera.
The Rockies anchored the jet stream during the last glaciation…
And we already see this, last winter being a notable example.
The paper has it the wrong way round.
It is the change in jet stream/blocking that has brought warm air up to the Arctic. It is not the “warm Arctic” that has changed the jet stream
“The paper has it the wrong way round.”
Maybe ‘the paper’ was meant for the other side of the the world (:-))
Talking about paper the wrong way round, remember ‘Izal’
http://s10probus.co.uk/the-history-of-izal-joan-jones-7th-march-2016/
this could be a good substitute.
They affect each other, ie a feedback.
Paul is right. Heat drives the wind. The weather is driven mainly from the equator towards the poles. Not the other way around….
As usual, wrong henry.
Somewhat simplistically air is heated in the tropics and rises [low pressure] drawing in cooler, denser air from the north and south [ultimately the poles]. That’s not “weather driven mainly from the equator”..
It’s actually ankle bone connected to the shin bone, shin bone connected to the knee bone etc
Tony, Greg,
I doubt that there really is much warming of the ocean water by the sun beyond [40] degrees latitude
The produced water vapor comes mainly from around equator.
It is that which produces the wind / weather.
I don’t know how anyone can think otherwise.
Must say that my measurements show no warming in the SH. Go figure that one out for me.
henryp (replying to Tony and Greg
Actually, there is notable ocean warming by the sun up to 55 latitude (north or south). A convenient latitude if you remember that Cape Horn is right at 56 south latitude. The greatest absorption is between -45 South and 45 North, and there is important warming as far as 60 north or south many months of the year.
But, past 65 north, the opposite occurs: Less sea ice, more heat loss (over the entire year.) Warming ONLY occurs up north during April, May, June, and July. The rest of the year? No solar heating at all, or the energy absorbed by sea ice ~ = energy absorbed by open ocean.
Down south? Limited solar heating of the ocean occurs every month of the year, and significant solar heating 8 months of the year. But it is very small only in June-July as the ice pack approaches the edge of the Antarctic continent.
I have been in the arctic circle not so long ago for a holiday. September.
At the beach I could not really discern heat coming from the sun [on my skin] and the water was ice cold. Could not keep my feet in the water. 8 degrees C, maybe?
Cloudless day. + or – 15 degrees C of air.
The warming not discernible by me in the SH is counted from 40 years ago, average of 27 weather stations.