Sentences with phrase «polar cap»

For this study, the area - weighted polar cap geopotential height and air temperature anomalies (PCH and PCT) were computed for the months December through February using the National Centers for Environmental Prediction (NCEP) reanalysis at global 2.5 ° resolution for latitudes north of 65 ° N, using the period 1950 to 2016 for analysis69.

The separation of the negative NAM from the positive polar cap anomalies are emphasized with a difference analysis comparing these binned temperature anomalies between the 1000 hPa PCT composite and the negative NAM composite (Fig. 10b).

The first two are called the polar cap geopotential height anomaly (PCH) index and the polar cap air temperature anomaly (PCT) index.

A local effect, may be the whole polar cap, but the net effect is the same.

The latest plot of the polar cap geopotential heights (PCHs) shows below normal PCHs in both the stratosphere and the troposphere (Figure 10).

Abstract Arctic sea ice data from the 1953 — 77 period are digitized onto a set of 300 monthly grids covering the polar cap.

A mosaic of Mariner 9 frames, taken during the spacecraft's first orbit of Mars, showed the south polar cap dimly through a great dust storm.

In Section 3.2, L. Perrone and M. Parisi present an original study on the sudden increase of the polar cap absorption (PCA) linked to a Halo CME on 9 May 2005.

Special interest invokes the so - called polar cap absorption events produced by energetic solar protons emitted in the CME regions on the Sun and accelerated by CME sheaths and magnetic clouds during their travel to the Earth's magnetosphere.

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.

The negative AO phase is characterized by a high - pressure center anomaly over the entire Arctic basin or polar cap and low - pressure center anomalies in each ocean basin in the mid-latitudes.

I've looked at the surface latent and sensible heat flux averaged for a polar cap (north of 70N).

The main thing ensuring no polar cap will be rainfall.

It is only a matter of time before the thermal momentum of the latter part of the 20th century is reversed, and the northern polar cap begins to cool back down, reforming the ice.

As both a movie - tie in and Olympic competition, the timing of Ice Age: Continental Drift — Arctic Games «release is nearly impeccable, even it's polar cap - based sporting recreations evoke the Winter games rather than the imminent summer competitions.

Residual south polar cap of Mars: Stratigraphy, history, and implications of recent changes P. C. Thomas, P. B. James, W. M. Calvin, R. Haberle, and M. C. Malin Icarus 203, 352 — 375, doi: 10.1016 / j.icarus.2009.05.014, October 2009.

Variability of the south polar cap of Mars in Mars years 28 and 29 P. B. James, P. C. Thomas, and M. C. Malin Icarus 208, 82 — 85, doi: 10.1016 / j.icarus.2010.02.007, July 2010.

The polar cap has a spiral appearance with multiple chasms visible.

An early summer view of the north polar cap taken on 13th March, 1999 by the Mars Orbiter Camera on board the Mars Global Surveyor.

The latest image from the Mars Express orbiter, just released by the European Space Agency, was taken on the 19th June, 2017 and shows a rare upside - down, wide - angle view of Mars with its icy northern polar cap at the bottom.

Martian north polar cap recession: 2000 Mars Orbiter Camera observations P. B. James and B. A. Cantor Icarus 154, 131 — 144, doi: 10.1006 / icar.2001.6653, November 2001.

However, most of the surface features unveiled by Hubble, including the prominent northern polar cap, are likely produced by the complex distribution of frosts that migrate across Pluto's surface with its orbital and seasonal cycles and chemical byproducts deposited out of Pluto's nitrogen - methane atmosphere.

«The observation that Mars» northern polar cap barely deforms [from season to season] implies that its planetary interior is colder than expected.»

By comparison, the Antarctic ice sheet on Earth weighs about 4 × 1018 kg, and Mars» south polar cap contains about 1016 kg of water.

I had just been in a discussion of climate change on a messageboard where someone had triumphantly put up links to various blogs (including one that you noted here) drawing conclusions about the cause of the global warming here on earth on the basis of these recent measurements of Mars's south polar cap!

For example, 2005 is near solar minimum in the 11 year cycle, and radiance now is about 1 - 2 W / m ^ 2 less than a few years ago, which means Pluto and Mars are getting LESS solar radiance on the time scale of the atmosphere and polar cap changes, EVEN IF the radiance averaged over the whole cycle was higher.

A dark red northern polar cap on Pluto's largest moon Charon may be caused by trapped gas, according to research published in Nature this week.

(Copyright Calvin J. Hamilton) Polar Laminated Terrain One of the discoveries of the Mariner 9 spacecraft was that the south polar cap of Mars was made of thin layers or laminations of ice and sediment.

The visible layering occurred as a result of wind born dust settling upon the polar cap.

This storm is several hundreds of kilometers in extent and is located near the edge of the south polar cap.

Four years later, on October 10, 1976, the Viking 2 spacecraft took this picture of the Martian north polar cap.

(Courtesy NASA) North Polar Cap This image is an oblique view of the north polar cap of Mars.

The polar cap can be seen to the north.

Unlike the south polar cap, the north polar cap probably consists of water - ice.

The dark, red polar cap — informally named «Mordor» — appears to have been shattered in places by impacts, suggesting that the dark covering is but a thin veneer.

And NSF didn't get its wish to start construction of a polar cap observatory near the magnetic North Pole.

The icy northern polar cap has receded to a comparatively small size because it is now late summer in the northern hemisphere.

An extended blanket of clouds can be seen over the southern polar cap.

Arctic scientists say they've just begun to document the polar cap's biological diversity.

The team also offered an intriguing theory for Charon's reddish polar cap.

As the polar cap disintegrates it gives rise, as we have seen, to a dark belt of blue - green, which fringes its outer edge and retreats farther as it shrinks.

Not only is the period of the two series of changes the same, but the one follows the other; for the development of the canals does not begin until the melting of the polar cap is well under way.

The only difference between the two is that each polar cap has but one maximum and one minimum in the course of this time, while most of the canals have two of each, though neither the maxima nor the minima are alike.

It appears that much at least of the surface of Mars has two seasons of vegetal growth, the one quickened by the north polar cap, the other by the south.

«It might begin to snow as the polar cap expands,» says Malin.

The canals run at their northern ends into dark spots at the edge of the polar cap.

The canals begin to develop after the greatest melting of the polar cap has occurred.

The melting of our polar caps is a serious problem, and one which has numerous sources.

The polar caps are remarkably volatile and sensitive to temperature variations.

The polar caps are also responsible for helping to moderate the global temperatures as a whole, and the smaller they are the less impact and control they have.