Questions tagged [enso]

The El Niño Southern Oscillation, including El Niño and La Ninã

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5 votes
1 answer
34 views

How to remove the ENSO signal on ocean bottom pressure data?

I am trying to remove the possible effect of El Niño-Southern Oscillation (ENSO) phenomenon on sea bottom pressure records (sensor 4, 5 & 7, see map) that are located in front of the Pacific coast ...
  • 107
3 votes
0 answers
37 views

What if Pinatubo's eruption in 1991 had been followed by a La Niña rather than an El Niño?

If there had been a La Niña rather than an El Niño in 1991-92, would the sulfur aerosol veil caused by the release of 17-20 megatons of sulfur dioxide during the Pinatubo eruption of June 1991 have ...
2 votes
1 answer
104 views

How to classify the ENSO phase of a year?

I am using the ONI index to classify the years of high rainfall seasons (December–February) as El Niño, Neutral or La Niña. El Niño year is classified as one if the ONI index value is +0.5 °C for 5 ...
  • 339
4 votes
0 answers
81 views

Will the next ENSO event be of modoki type?

Where can I find free information to learn if the forecasted ENSO El Nino event for 2nd semester 2017 will be a MODOKI one? The Japan Meteo Service also publishes the EL-NINO-MODOKI Index (below), ...
  • 231
3 votes
1 answer
1k views

Can El Niño and La Niña occur at the same time?

We often read that El Nino and La Niña occur alternatively. Are they the exact opposite of each other? Or, in other words, can they happen at the same time? (i.e. the whole Pacific Ocean has a higher ...
  • 1,349
4 votes
1 answer
138 views

Can El Niño/La Niña occur again after normal state?

As I know, El Niño and La Niña usually occurs alternatively, but is it possible that El Niño occurs again after El Niño and return to normal state?
  • 1,349
7 votes
1 answer
437 views

How will global warming affect climate systems like the ENSO or the MJO?

How will global warming influence climate systems such as the Madden–Julian Oscillation (MJO) or the El Niño Southern Oscillation (ENSO)?
  • 71
11 votes
2 answers
373 views

What causes these odd-looking currents in the Tasman Sea?

I was looking at the model ocean current maps from earth :: a global map of wind, weather, and ocean conditions for 2015-10-07 00:00 UTC and there are a lot of odd-looking 'whirlpool' areas off the ...
  • 4,419
4 votes
1 answer
180 views

Confirmation of historical El Niño events

As this year's boreal summer monsoon draws to a close interest automatically centers around forecasts for next summer's monsoon and the likelihood of possibly another El Niño event. This brings about ...
  • 6,287
8 votes
0 answers
192 views

El Niño Spring Barrier - optimal time to run a long range climate forecast

在回答这个问题——什么是作表语用tability of El Niño/La Niña? Isopycnal Oscillation talks about a "decrease in skill during the boreal spring as SST anomalies are ...
  • 6,287
13 votes
0 answers
176 views

Oceanic-atmospheric coupling between the Indian Ocean and the Pacific Ocean basins

The two great basins - Indian Ocean and Pacific Ocean have their respective oscillations: Indian Ocean Dipole and El Nino Southern oscillation that affect the climate of the regions as well as the ...
  • 6,287
17 votes
1 answer
420 views

What is the predictability of El Niño/La Niña?

What is the maximum period of time into the future that an El Niño event can be forecasted with reasonable accuracy and what are the limitations in predicting the time limit?
  • 6,287
15 votes
3 answers
13k views

What is El Niño Modoki?

What are the characteristics that distinguishes a El Niño Modoki from a "normal" El Niño? What are the effects of El Niño Modoki on atmospheric and oceanic processes? How does it affect weather ...
  • 15.3k
9 votes
0 answers
152 views

Relation of El Niño to Monsoons

Scientists are forecasting a weak to moderate El Niño event to emerge in the coming months, what causes this to happen? Once developed, how will the El Niño conditions effect progressive monsoon ...
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8 votes
1 answer
242 views

How does El Niño affect thunderstorm/tornado/CAPE activity in the central United States?

Or in other words, does it increase the amount of heat+moisture advection from the Gulf of Mexico into the Central United States? And is this increase associated with increased CAPE/tornado/...
  • 7,757

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