Sentences with phrase «strong positive phase»

Since the mid 1990s the NAO has changed from a strong positive phase to a more neutral phase.

Not exact matches

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The readings revealed a shift in the Antarctic Oscillation (AAO), the seesawing pattern of pressure that controls the winds around the South Pole: in recent years, it seems, the AAO has been spending more time in its positive, strong - wind phase.

Thompson and Solomon (2002) showed that the Southern Annular Mode (a pattern of variability that affects the westerly winds around Antarctica) had been in a more positive phase (stronger winds) in recent years, and that this acts as a barrier, preventing warmer air from reaching the continent.

Using reanalysis moisture budgets and drawing on the attribution work of others (e.g. Hendon et al. [2013]-RRB-, Fasullo et al. [2013] demonstrate that the 2011 La Niña was also distinct from others in the altimeter era in that it coincided with a strong negative phase of the Indian Ocean Dipole (IOD) and positive phase of the Southern Annular Mode (SAM)(Fig. 3c).

During the positive phase of the AO, cold air is characteristically locked up over the Arctic by a strong polar vortex, and the mid-latitudes tend to be mild.

We are weaker in positive and stronger in negative strength phase.

As you get stronger, increase the time you take to perform the negative (lowering phase), and try to do the same on the positive portion of the rep — pull yourself up slowly.

stay strong Charlotte, i love reading your blog and you have inspired me in many ways, not just fashion wise, im sure you will continue to inspire me throughout this phase, but first and foremost look after yourself and keep positive, sending love from london, and anyway scars are sooo hot right now;) x

There are at least 2 papers that talk about a «phase catastrophe» during the Maunder and Dalton minima implying either a period when the solar poles are both the same polarity for an extended period or the cycle goes to 22 years instead of 11, I also think its highly possible that both poles could fluctuate between positive and negative through the entire cycle if the new polar inflows are not strong enough to change the polarity.

For example, La Niña winters tend towards a stronger polar vortex and the positive phase of the NAO, but if the polar vortex breaks down (which it's done many times during La Niña winters; Butler & Polvani 2011) it will push the climate towards a negative NAO pattern, and the two effects tend to cancel over the season.

When the SAM is in a positive phase — meaning that the belt of winds is stronger than average — it has a cooling effect on Antarctic surface temperatures.

A positive phase of the SAM, contributing to stronger westerlies in this sector (Fig. 6a) could also explain the sea ice trend.

The Positive NAO index phase shows a stronger than usual subtropical high pressure center and a deeper than normal Icelandic low.

It's apparent that the negative feedbacks from water in all its phases are much stronger than the positive feedback from water vapor as a GHG.

From the 1950s to the 1980s, the AO flipped between positive and negative phases, but it entered a strong positive pattern between 1989 and 1995.

These developments are somewhat antithetical to predictions made in the 90s and 2000s, when the polar vortex was in a strong phase (positive AO).

For office, the report is positive, classifying 32 downtown areas as being in the «expansion» phase, which includes strong demand, tight market conditions leading to low vacancy rates, robust rental growth and decreasing overall cap rates.