Sentences with phrase «positive phase ao»

It's not certain, but there are indications that one should expect a more positive phase AO.

Not exact matches

Indeed, the dampened late 20th century winter warming over a substantial part of Greenland, particularly the western and southern regions emphasized by the network of stations analyzed by Vinther et al, is known (see e.g. this NOAA page) to be associated with a trend toward the positive phase of the Arctic Oscillation («AO») pattern.

Similarly, if as a number of recent studies suggest, anthropogenic climate forcing leads to a greater tendency for the positive phase of the North Atlantic Oscillation (NAO)[or related «Arctic Oscillation» (AO)-RSB- pattern, we would expect increased baroclinicity and storminess over a substantial region of the mid-latitude North Atlantic ocean and neighboring western Europe..

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.

Indeed, the dampened late 20th century winter warming over a substantial part of Greenland, particularly the western and southern regions emphasized by the network of stations analyzed by Vinther et al, is known (see e.g. this NOAA page) to be associated with a trend toward the positive phase of the Arctic Oscillation («AO») pattern.

The AO has been described as «a seesaw pattern in which atmospheric pressure at polar and middle latitudes fluctuates between positive and negative phases.

Perhaps, you meant the AO is in a positive phase, in which the site says,» The Arctic Oscillation (AO) appears to be the cause for much of the recent changes that have occurred in the Arctic.

[Response: There is evidence that the enhanced continental winter warming in the Northern Hemisphere, which has resulted at least in part from a recent trend towards the positive phase of the Arctic Oscillation (AO), may in fact also represent a response to anthropogenic impacts on climate.

Bob, the somewhat recent rise in temperature also coincides with the positive phase in the AO.

Pamela Gray says: «Bob, the somewhat recent rise in temperature also coincides with the positive phase in the AO.

When the AO is in a positive phase, sea level pressure in the Arctic is particularly low.

Typically, during a positive phase of the AO, surface winds push ice away from the shores of Siberia, and any young, thin ice that is subsequently formed is prone to melting in summer.

The intensification of the Northern Hemisphere circulation is reflected in the positive phase of the Arctic Oscillation (AO), associated with higher - than - normal surface pressure south of about 508 N and lower - than - normal surface pressure over the high northern latitudes.

Low pressure in the Arctic region is referred to as the positive phase of the Arctic Oscillation (AO), which is also know as the North Atlantic Oscillation (NAO).

The positive AO phase is characterized by a low - pressure center anomaly over the entire Arctic basin or polar cap (the region poleward of 60 ° N) and high - pressure center anomalies in each ocean basin in the mid-latitudes.

During the positive AO phase there is little mixing of atmospheric masses between the Arctic and lower latitudes (mid-latitudes and subtropics) so the cold air stays bottled up in the Arctic and mild air dominates the mid-latitudes.

Qualitatively speaking, positive phases of the Arctic Oscillation (AO) and El Niño - Southern Oscillation (ENSO) produce similar ice changes in the western Arctic, but opposite ice changes in the eastern Arctic.

Following from this the North Atlantic Oscillation (NAO) * and to a lesser extent the Arctic Oscillation (AO) are more likely to return to a positive phase, with depressions following a course over the North Atlantic.

Siberian / eurasian warming during volcanic excursions (due to the positive phase of the AO) if you get the sign wrong eg Hanson or Schmidt in the various configurations show that there is indeed persistence of the ability to reproduce the wrong sign.

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).