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Why the Stratosphere Gave a False ENSO Signal in the Spring


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Kind of makes the dream of interstellar travel seem a bit fleeting and unattainable if every quantum scale fraction of our beings are inexorably linked to the vagaries of the sun

Control issues, when out of hand, can cause someone a lot of pain.

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I'll say this for kelvin waves: the logic behind them increasing the potential for tropical storms/systems is sound. However, and I realize this is entirely anecdotal, many of them go under the radar. They just don't have the same type of "stir-up" that full blown MJO waves have when it comes to tropical genesis. That 10N-30N belt is going to feel the brunt of a MJO wave more than some quick impulse along the equator/ITCZ. But having said that, I still do use kelvin waves in my forecasts for the Tropics for sure!

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latest weeklies ... first since May 5, 2010 with 0.0+ across the board

                  Nino1+2      Nino3        Nino34        Nino4

Week            SST SSTA 	SST SSTA 	SST SSTA 	SST SSTA

01JUN2011 	24.3 0.7 	26.8 0.1 	27.5-0.1 	28.4-0.2

08JUN2011 	24.2 0.9 	26.7 0.2 	27.5 0.0 	28.4-0.2

15JUN2011 	23.8 0.8 	26.6 0.2 	27.4-0.1 	28.4-0.3

22JUN2011 	23.2 0.4 	26.5 0.3 	27.4 0.0 	28.4-0.2

29JUN2011 	22.9 0.4 	26.1 0.1 	27.4 0.1 	28.6 0.0

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latest weeklies ... first since May 5, 2010 with 0.0+ across the board

                  Nino1+2      Nino3        Nino34        Nino4

Week            SST SSTA 	SST SSTA 	SST SSTA 	SST SSTA

01JUN2011 	24.3 0.7 	26.8 0.1 	27.5-0.1 	28.4-0.2

08JUN2011 	24.2 0.9 	26.7 0.2 	27.5 0.0 	28.4-0.2

15JUN2011 	23.8 0.8 	26.6 0.2 	27.4-0.1 	28.4-0.3

22JUN2011 	23.2 0.4 	26.5 0.3 	27.4 0.0 	28.4-0.2

29JUN2011 	22.9 0.4 	26.1 0.1 	27.4 0.1 	28.6 0.0

Looks like some cooling in Region 3...

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29JUN2011 	22.9 0.4 	26.1 0.1 	27.4 0.1 	28.6 0.0  
06JUL2011 	22.2 0.0 	25.8-0.1 	27.1-0.1 	28.5-0.1

Slight cooling, but with a wave currently crossing the basin, these numbers will probably show warming next week. I still think we'll end with some net cooling by winter (cool neutral to weak Niña)

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With QBO easterlies steadily descending, and westerlies weakening, I still think we do not see a weak La Nina develop, and favor around neutral. We are certainly seeing an IOD more representative of El Nino taking shape

In particular, we should see MJO activity start to increase markedly over the next 4 months, and gradually shift low frequency convection eastward into the western Pacific toward the dateline.

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July's Eurosip consensus is cooler from the previous month

I'm not surprised: the western regions have cooled a lot as the tongue of warmth has faded, there are -3C anomalies at 100m subsurface between 130-140W, and SOI has been quite robustly positive.

Given this forecast, it looks as if the trades will continue to strengthen, driving more cooling into the ENSO area. Here are the zonal wind anomalies, blue for easterly trades:

post-475-0-35331400-1310650068.png

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I'm not surprised: the western regions have cooled a lot as the tongue of warmth has faded, there are -3C anomalies at 100m subsurface between 130-140W, and SOI has been quite robustly positive.

Given this forecast, it looks as if the trades will continue to strengthen, driving more cooling into the ENSO area. Here are the zonal wind anomalies, blue for easterly trades:

post-475-0-35331400-1310650068.png

The upwelling phase of the KW that's in the EPac right now. It didn't do much in the W part of the basin, which is par for the course this year. Also, ENSO OHC has been slowly decreasing, dissipating chances for any kind of Niño.

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The upwelling phase of the KW that's in the EPac right now. It didn't do much in the W part of the basin, which is par for the course this year. Also, ENSO OHC has been slowly decreasing, dissipating chances for any kind of Niño.

I think El Niño is out for Winter 11-12. In my opinion, some people are underestimating the resurgence of the La Niña. Although the highest probability is for a negative-neutral winter or borderline weak Niña, I do think it's possible we could get into moderate territory with how quickly the subsurface is cooling and this potent surge of trade winds. We also have a nice strong -PDO signal as well as an abnormally cold Humboldt/Chilean current stretching towards the ENSO regions. Today's new SST anomaly map is fairly impressive with the cold waters in all areas of the Pacific:

post-475-0-61055100-1310650626.gif

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I think El Niño is out for Winter 11-12. In my opinion, some people are underestimating the resurgence of the La Niña. Although the highest probability is for a negative-neutral winter or borderline weak Niña, I do think it's possible we could get into moderate territory with how quickly the subsurface is cooling and this potent surge of trade winds. We also have a nice strong -PDO signal as well as an abnormally cold Humboldt/Chilean current stretching towards the ENSO regions. Today's new SST anomaly map is fairly impressive with the cold waters in all areas of the Pacific:

post-475-0-61055100-1310650626.gif

I think we are going to see a big-time drop for the PDO numbers June/July.

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i think the nina is making a comeback...look at the heat building in the midwest and the dry weather and not to mention the monthly euro depicting a very mild and dry fall...ala typical nina. Only concern I have, and this is from a met out of STL that suggests that early winter could be on the warm and dry side...his take not mine, but it won't be early active.

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The upwelling phase of the KW that's in the EPac right now. It didn't do much in the W part of the basin, which is par for the course this year. Also, ENSO OHC has been slowly decreasing, dissipating chances for any kind of Niño.

06JUL2011 	22.2 0.0 	25.8-0.1 	27.1-0.1 	28.5-0.1 
13JUL2011 	21.9 0.0 	25.7 0.1 	27.1-0.1 	28.5 0.0

As anticipated, there was some slight warming, but it will be short lived, as the upwelling phase of the KW is gonna cool this anomalies for next weekly.

Looking farther in the medium/long range, I think this is the peak, and the stage is being set for a general period of cooling towards a Niña for this winter. Right now I'm favoring a weak Niña over neutral cold for winter '11-'12, and even moderate is not that far fetched.

I mentioned previously how the OHC was slowly declining, and this has turned pretty evident, with >+3C subsurface sea temps in the EPac disappearing, and new bubbles of cooler water making it's way to the surface.

OHC, steadily declining:

8zrIj.png

This is probably an overreaction to the latest trends, but the latest members of the CFS ENSO forecast are almost all below the consensus average, which troughs at moderate Niña..

nino34SSTMon.gif

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I almost wonder if we aren't heading into a cycle like we hit back in the 30s. There were a number of brutal summers back then. Last summer was the fifth warmest on record nationally, with 12 states and the District of Columbia recording their hottest summer on record. This summer is also shaping up to be a top ten overall, and could be the hottest on records in the Southern Plains. I believe June was the 25th warmest on record, and July will likely be in the top five (with a chance at beating 1936 and 2006 to become the hottest). With another Nina on the way (which some are forecasting to become moderate or strong), one would expect the multiyear southern drought to continue to intensify, perhaps setting the stage for another scorching summer in 2012.

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I almost wonder if we aren't heading into a cycle like we hit back in the 30s. There were a number of brutal summers back then. Last summer was the fifth warmest on record nationally, with 12 states and the District of Columbia recording their hottest summer on record. This summer is also shaping up to be a top ten overall, and could be the hottest on records in the Southern Plains. I believe June was the 25th warmest on record, and July will likely be in the top five (with a chance at beating 1936 and 2006 to become the hottest). With another Nina on the way (which some are forecasting to become moderate or strong), one would expect the multiyear southern drought to continue to intensify, perhaps setting the stage for another scorching summer in 2012.

who is?

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Little change overall, but easterlies will be raging over the dateline for several days at least, so next week should bring a cooler update.

13JUL2011     21.9 0.0     25.7 0.1     27.1-0.1     28.5 0.0
20JUL2011     22.1 0.4     25.6 0.1     26.9-0.1     28.4-0.2

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