Sentences with phrase «ocean circulation patterns over»

Also, recent research has tied 20th century temperature fluctuations in northern California, and much of the Pacific Northwest, to naturally occurring atmospheric / ocean circulation patterns over the Pacific Ocean.

Not exact matches

And given the fact that land warms more quickly than ocean, resulting in areas of low pressure over land, changing patterns of atmospheric and oceanic circulation are bringing them to the coasts — where so much life's diversity is found.

Warming is widespread over the upper layer of the ocean (500 meters or so), and this may change normal ocean circulation patterns, with unforeseen consequences.

There is also a natural variability of the climate system (about a zero reference point) that produces El Nino and La Nina effects arising from changes in ocean circulation patterns that can make the global temperature increase or decrease, over and above the global warming due to CO2.

The issue is that differences in mineral content, salinity, density, and temperature all affect how the ocean reacts to, and drives, changes in weather patterns, climate variations over years or decades, ocean current circulation, etc..

By examining the spatial pattern of both types of climate variation, the scientists found that the anthropogenic global warming signal was relatively spatially uniform over the tropical oceans and thus would not have a large effect on the atmospheric circulation, whereas the PDO shift in the 1990s consisted of warming in the tropical west Pacific and cooling in the subtropical and east tropical Pacific, which would enhance the existing sea surface temperature difference and thus intensify the circulation.

But matters are greatly complicated by atmospheric circulation patterns, cyclic changes in temperatures over the oceans, and the shapes of land masses.

They are being pushed out of the Arctic Ocean by a circulation pattern that starts over near Siberia; occasionally you'll see a Siberian tree washed ashore along this coast of Greenland.

The Walker circulation usually brings areas of high pressure to the western Indian Ocean but, in years when El Niño occurs, this pattern gets shifted eastward, bringing high pressure over India and suppressing the monsoon, especially in spring when the monsoon begins to develop.

What appears to be happening over the last 2000 yrs are changes to the circulation patterns in the oceans that appear to be cyclical in nature.

Many of these circulation patterns are thought to be driven by geographical features, such as the strong heating near the tropics nd over parts of the ocean basin, such as the Walker cell (see here).

A recent study on the North Pacific circulation patterns over the past 1.2 million years determined that sea ice on coastal areas can be an important factor in ocean circulation, therefore influencing climate at global and regional levels.

The models (and there are many) have numerous common behaviours — they all cool following a big volcanic eruption, like that at Mount Pinatubo in 1991; they all warm as levels of greenhouse gases are increased; they show the same relationships connecting water vapour and temperature that we see in observations; and they can quantify how the giant lakes left over from the Ice Age may have caused a rapid cooling across the North Atlantic as they drained and changed ocean circulation patterns.

Atmospheric circulation patterns interpreted for an early Silurian summer in the Northern Hemisphere indicate high pressure over the polar ocean with a zone of low pressure around 60 ° N latitude.