Sentences with phrase «subtropical jet stream»

Further, under a scenario of strongly elevated greenhouse forcing, Neelin et al. (31) found a modest increase in California mean December — January — February (DJF) precipitation associated with a local eastward extension of the mean subtropical jet stream west of California.

The subtropical jet stream is not always a totally distinct feature in the weather charts — it tends to be weaker and more discontinuous than its more robust northern cousin (the subpolar jet).

One sentence summary: A strengthened subtropical jet stream — which is the primary means by which El Niño brings increased precipitation to California — is unlikely to occur prior to winter due to the intrinsic seasonal cycle of temperature variations across the Pacific Basin.

Warm surface air creates more thunderstorms over the central and eastern pacific Effect: Subtropical jet stream is energized, storms lead to frequent mudslides in SO. CAL.

Effect: Subtropical jet stream is energized, storms lead to frequent mudslides in SO. CAL.

Subtropical jet stream moves northward bringing moisture, heavy rains, and mountain snows to the Pacific Northwest.

Subtropical jet stream Polar jet stream Next >

Polar jet stream Subtropical jet stream These fast winds are known as jet streams and they continuously circle the Earth.

Over North America, El Niño tends to strengthen the subtropical jet stream during the winter months, which tilts the odds for shifts in temperature and precipitation across much of the country.

And those changes in the Hadley Circulation can affect the subtropical jet stream — an area of fast - moving air that guides storms — in both the Northern and Southern hemispheres.

The shifts in the Hadley Circulation affect the subtropical jet stream that crosses the U.S., pushing it southward and making it extend further eastward.

The changes in the atmospheric circulation include things like a stronger subtropical jet stream.

[It typically runs across southern Canada and the northern U.S., different from the subtropical jet stream.]

While the polar and subtropical jet streams are the best known and most studied, other jet streams can form when wind speeds are above 58 mph (93.3 kph) in the upper atmosphere at about 6 miles (9.6 kilometers) to 9 miles (14.5 kilometers) above the surface.

Not exact matches

«Subtropical highs that normally redistribute heat in this region, they were shifted northward,» said PMD scientist Muhammad Hanif, describing the system that developed over western China that disturbed the jet stream.

«Regardless of the cause,» the authors note, «the poleward shift of the jet streams and the associated subtropical dry zone, if it continues, could have important societal implications.»

In the case of the recent rains in South Florida, «the subtropical jet helped stream in moisture from the tropical Pacific,» Florida state climatologist David Zierden said in an email.

2) A dominant northern jet stream and lack of a subtropical jet.

And the very same jet stream configuration responsible for the southward plunging Arctic air mass chilling the eastern United States is associated further to the west with a «ridge» of high pressure that is pushing the warm, moist subtropical Pacific air masses that would normally deliver plentiful rainfall (and snowpack) to California well to the north.

During a typical El Niño event, the jet stream setup illustrates the subtropical (or Pacific) jet stretching from California to Florida, and the polar jet stuck in Canada during the winter months.

Sometimes, the subtropical jet is not discernable at all in a particular region, and at other times it effectively merges with the northern stream.

Given that the NARR high - level cloud layer is situated above 350 mb, this latitudinal asymmetry is likely due to the positioning of the subtropical and polar jet streams.

We found that relative to the global - mean trends of the respective layers, both hemispheres have experienced enhanced tropospheric warming and stratospheric cooling in the 15 to 45 ° latitude belt, which is a pattern indicative of a widening of the tropical circulation and a poleward shift of the tropospheric jet streams and their associated subtropical dry zones.

However, climatological zonal average wind can obscure important aspects of jet streams (such as the distinction between polar and subtropical).