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2015 ENSO super thread


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You'd be hard pressed to find a strong Nino with this type of CONUS temperature response of coast to coast warmth. 

 

It will be interesting to see what happens this month but these are years with a fairly decent +QBO signal around this time.

Took the data from: http://www.geo.fu-berlin.de/met/ag/strat/produkte/qbo/qbo.dat

 

Looks like persistent troughing in the west and ridging in the east. The winter temps from those years are horrible mainly in the NE and around the great lakes.

 

cd174.59.196.70.313.10.50.11.prcp.png

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This is what we have had so far

 

cd174.59.196.70.313.10.4.36.prcp.png

 

Not that it makes much difference, but I wouldn't think it appropriate to show current anomalies vs a period that ended 20 years ago during a state of significant global warming, if you are trying to isolate the anomaly distribution pattern.

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This is ironic, because:

cd66.249.84.72.313.9.16.35.prcp.png

Unless you're referring to super El Niño's. I'd just like to point out that the sample size for super El Niño's is small, and thus, does not serve as a true statistic.

I was referring to all 11 strong El Ninos, but in the southern Lakes. I didnt realize that there were (apparently) some mild Septs on the east coast.

 

This is a cut/paste from our winter disc thread from the Lakes forum. These are Detroits monthly temps during strong Ninos. Blue is colder than normal, red is warmer, black is +/- 0.5F of normal.

 

STRONG EL NINOS

Season -- SEP -- OCT -- NOV -- DEC -- JAN -- FEB -- MAR -- APR

1877-78 -- 64.3 -- 53.8 -- 39.2 -- 38.1 -- 27.3 -- 29.2 -- 41.3 -- 53.4

1888-89 -- 60.0 -- 46.9 -- 41.4 -- 31.4 -- 29.8 -- 19.4 -- 37.4 -- 46.3

1896-97 -- 59.6 -- 47.6 -- 40.5 -- 30.3 -- 23.0 -- 27.4 -- 34.6 -- 45.2

1899-00 -- 59.7 -- 56.0 -- 42.8 -- 28.7 -- 28.3 -- 21.3 -- 26.3 -- 48.3

1902-03 -- 62.2 -- 52.4 -- 46.9 -- 26.9 -- 24.1 -- 25.6 -- 41.5 -- 46.9

1940-41 -- 62.8 -- 51.1 -- 38.0 -- 32.0 -- 26.3 -- 25.3 -- 30.5 -- 52.6

1957-58 -- 62.9 -- 50.8 -- 41.0 -- 34.1 -- 26.6 -- 22.8 -- 36.3 -- 49.6

1972-73 -- 63.0 -- 47.3 -- 37.4 -- 29.3 -- 28.8 -- 25.3 -- 43.3 -- 48.8

1982-83 -- 61.8 -- 52.5 -- 41.6 -- 37.3 -- 28.7 -- 31.6 -- 38.3 -- 44.2

1991-92 -- 63.1 -- 54.8 -- 38.5 -- 32.1 -- 28.3 -- 30.8 -- 35.5 -- 46.3

1997-98 -- 62.7 -- 51.7 -- 37.1 -- 32.2 -- 32.8 -- 36.7 -- 39.5 -- 50.4

 

(for reference, avg temps)

SEP: 64.4...OCT: 52.4...NOV: 41.5...DEC: 30.1...JAN: 25.6...FEB: 28.1...MAR: 37.2...APR: 49.2

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It will be interesting to see what happens this month but these are years with a fairly decent +QBO signal around this time.

Took the data from: http://www.geo.fu-berlin.de/met/ag/strat/produkte/qbo/qbo.dat

 

Looks like persistent troughing in the west and ridging in the east. The winter temps from those years are horrible mainly in the NE and around the great lakes.

 

cd174.59.196.70.313.10.50.11.prcp.png

I would take most of the winters in a heartbeat. Its actually not that bad even in the northeast. Look at the scale, its such a small departure PLUS its 1950-95 norms.

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It will be interesting to see what happens this month but these are years with a fairly decent +QBO signal around this time.

Took the data from: http://www.geo.fu-berlin.de/met/ag/strat/produkte/qbo/qbo.dat

Looks like persistent troughing in the west and ridging in the east. The winter temps from those years are horrible mainly in the NE and around the great lakes.

cd174.59.196.70.313.10.50.11.prcp.png

That scale is soooo small. The max below and above on the scale is only 1 degree F, and the increments are only 2 tenths of 1 degree F. Looks like noise at best.
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That was from those years with strong +QBO the September through November temps. September and October were more warm anoms across the country but when adding november large decreases in temp in the upper midwest and mountain west. I didnt post Dec thru Feb if you would like to see let me know or go try it for yourselves.

 

Just an idea for why temps are the way they are. MSLP averaged from those years is fairly close to this year. 

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November 7th, 2015 minus 1997 and then minus 2009.  Clearly 97 had a warmer 1+2 region, which we already know since this year is 2nd only to 97 in that department.  2015 is vastly different from 2009, with a wide expanse of much warmer anomalies spanning basically everywhere east of the dateline.

 

2015 is more similar to 1997 than it is to 2009 in the distribution of sea surface temperatures.

 

 

Now let's qualitatively look at the anomaly distribution and magnitude of each year.

 

2015

 

1997

 

2009

 

This is not to mention the fact that 2009 became even more west-based with time as upwelling began along the South American coast.  2015 will see yet another KW by early December, and even if it does not, it will follow the climatological trend of gradually weakening from east to west beginning in early winter.  2009 is even more of a terrible analog because of the very low AAM background, 100 year solar minimum, and raging easterly QBO at 30mb heading into winter!

 

Now let's look at the atmospheric response

 

2015 VP

 

1997 VP

 

2009 VP

 

No one is going to say that there aren't important differences between 2015 and 1997, and technically anything that isn't the strongest el Nino on record is going to lurk in the territory between 97 and 09, but to say that 15 is more similar to 09 is objectively false.  The VP signal alone shows that.  It will be interesting to go back to these maps in early December after 1-2 warms again.

 

October TNI for all 3 years.  TNI is a measure of the spatial distribution of SSTs similar to what I was trying to show in the first plots:

2015: 0.017 (remarkable that it's even positive given how warm the western regions are!)

1997:  3.090 (where it peaked)

2009:  -2.025

 

There are other factors at play that describe how useful 97 and 09 are as analogs (I mentioned how bad 09 is above), but 2015 is a full-fledged el Nino similar to 1997, but trailing in strength.  However, it is not west-based, it is not modoki, and it is most certainly not 2009.

 

 

PS - I know I am only showing one single day of SSTs in the plots.  But the argument being made is that 2015 can only be seen as being is only dissimilar to 2009 on the date of November 7th if one is "drunk".

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When comparing October to November so far the warm pool movement is pretty huge.3hhcDF0.jpg

This supports my theory where as the cold pool pushes eastward, the warm pool does as well. It's suggested that this may certainly evolve into an east-based El Niño, contrary to popular belief.

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This supports my theory where as the cold pool pushes eastward, the warm pool does as well. It's suggested that this may certainly evolve into an east-based El Niño, contrary to popular belief.

The bottom map clearly shows the forcing of the cold water eastward. I suspect that will start mixing with the warm water which will begin to cool it. Plus, the cold water is expanding in size in addition to pressing east, which tells me the Niño is ready to peak. That's my hunch.
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That's to say nothing of the differences in the stratosphere at this phase. I know this is technically an ENSO thread, but I'm just saying....2015 ain't 2009. And it isn't going to be.

15.gif

97.gif

09.gif

Isn't this more reflective of the phase of the QBO? November 1997 and 2015 both saw a +QBO while 2009 saw a -QBO. If I recall correctly, November 1957 also saw a +QBO.

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