Sentences with phrase «ice changes appears»

Not exact matches

The paper, to appear Sept. 14 in The Cryosphere, is the first to quantify the sea ice changes in each polar bear subpopulation across the entire Arctic region using metrics that are specifically relevant to polar bear biology.

There also appears to be a strong correlation between the area of multiyear ice and the spatially averaged thickness of the perennial ice pack, which suggests that the satellite - derived areal decreases represent substantial rather than only peripheral changes.

For example, the ice ages during the last several million years — and the warmer periods in between — appear to have been triggered by no more than a different seasonal and latitudinal distribution of the solar energy absorbed by the Earth, not by a change in output from the sun.

Changes to Antarctic winds have already been linked to southern Australia's drying climate but now it appears they may also have a profound impact on warming ocean temperatures under the ice shelves along the coastline of West and East Antarctic.

As climate change causes sea ice to shrink, the number of «problem» polar bears appears to be increasing.

These ice shelves appear to be extremely sensitive to climate change.

The comet appears to have undergone visible changes, including the changes in the size and number of surface features such as smooth patches, pits, and craters, and the loss of ice vaporized by the Sun or blasted off its surface by the Solar Wind into its tail as well as failing back on the object like snow, so that it appears to shrink, on average, by 25 to 50 centimeters (9.2 to 19.7 inches) with each orbit around the Sun.

And given that much of this is related to the loss of polar ice, a changing climate would appear to be at least partly — although perhaps not wholly — responsible.

[Andy Revkin — Above, Mr. McCain appears to be using references to observed changes in ice and climate to fend off potential criticism from a small, but vocal array of climate scientists and conservative or anti-regulatory groups that disparage computer simulations showing the consequences of rising greenhouse - gas concentrations.]

... Polar amplification explains in part why Greenland Ice Sheet and the West Antarctic Ice Sheet appear to be highly sensitive to relatively small increases in CO2 concentration and global mean temperature... Polar amplification occurs if the magnitude of zonally averaged surface temperature change at high latitudes exceeds the globally averaged temperature change, in response to climate forcings and on time scales greater than the annual cycle.

Even in the absence of huge amounts of carbon dioxide as a forcing mechanism, he said, there still appear to be trigger points that, once passed, can produce rapid warming through feedbacks such as changes in sea ice and the reflectivity of the Earth's surface.

Around 2002 the sea ice dynamics shows some interesting changes, with what appear to be orthogonal shock waves across the ice pumping cycles.

The study also noted a 10 percent rise in the area of sea ice around the continent since 1980, which the authors said appears related to changes in winds ascribed to the depletion of the ozone layer there.

Although there is still some disagreement in the preliminary results (eg the description of polar ice caps), a lot of things appear to be quite robust as the climate models for instance indicate consistent patterns of surface warming and rainfall trends: the models tend to agree on a stronger warming in the Arctic and stronger precipitation changes in the Topics (see crude examples for the SRES A1b scenarios given in Figures 1 & 2; Note, the degrees of freedom varies with latitude, so that the uncertainty of these estimates are greater near the poles).

The colonization of new rivers by pink salmon is just one of many changes in fish and crab stocks that appear linked to retreating sea ice and warming waters in the Chukchi Sea and, farther south, the Bering Sea.

Consider the ice ages, the alleged cause in this case is changes in the earths orbit BUT the ice ages are characterized by significant changes in CO2 levels that would appear to be the direct driver (i.e.» forcing») of the consequent climate change.

Based on last year's estimate, the initial condition change (thinning the ice pack by 60 cm) did appear to have improved the model's behavior and skill.

Research indicates that the Arctic had substantially less sea ice during this period compared to present Current desert regions of Central Asia were extensively forested due to higher rainfall, and the warm temperate forest belts in China and Japan were extended northwards West African sediments additionally record the «African Humid Period», an interval between 16,000 and 6,000 years ago when Africa was much wetter due to a strengthening of the African monsoon While there do not appear to have been significant temperature changes at most low latitude sites, other climate changes have been reported.

It appears that Antarctic sea ice changes in steps and that the current period is one of relative stability.

And science is emerging suggesting a link between the melting of Arctic sea ice on one hand and faster warming in the region and changes to the northern hemisphere jet stream on the other, explaining why some weather systems appear to get «stuck in place» — to often - devastating effect.

The ice ages appear to relate to a change in that ice sheet driven by variations in the earth's orbit.

Polyak et al. (2010) looked at Arctic sea ice changes throughout geologic history and noted that the current rate of loss appears to be more rapid than natural variability can account for in the historical record.

(btw - the main problem with the students attitude may not be incompetence but simply the fact that they got so used to trust blindly what tv or experts tell them (especially when they appear in groups) and that they can not imagine that there may be something wrong though even current scandals (VW - Diesel) or older failures (ozon - cfc / ice age scare) or even the fact that thousands of scientists were more than willing to change their ideology and citizenship (+ certain scientific believes) as it happened with «operation paperclip.

some parts of the globe appear to be warming, other parts appear to be cooling (notably the US appears to have cooled since the 1930s / 40s), and some parts of the globe appear to have undergone little if any change (the Antarctic shows no warming for the entirety of the satellite record, and during that time Antarctic ice appears to have increased, but not statistically).

It now appears that Western Antarctic ice shelf instability is due to volcanic and magmatic activity beneath it — not climate change.

The interesting thing about the change in date is that it appears to be a lot closer to being in sync, whereas it is probably rate of change ice area that will be in phase with temperature.

It appears so many new Greenland Ice papers are in the offing, and so much improvement in methodology, that we might see a virtual doubling in both the quality of the data and the span of time accurate mass change data is available.

If the mechanism involves the persistence of Arctic summertime ice, how will this be affected by anthropogenic temperature changes that appear to be driving the Arctic in the direction of increasing loss of summer ice?

The modeled evolution of Arctic sea ice volume appears to be much stronger correlated with changes in ice thickness than with ice extent as it shows a similar negative trend beginning around the mid-1990s.

«Much of our confidence stems from the fact that our model does well at predicting slow changes in ocean heat transport and sea surface temperature in the sub-polar North Atlantic, and these appear to impact the rate of sea ice loss.

Trying once more with the inefficient scientific part of my brain to avoid overconcluding from the visual (not to mention short - term), I see the date on this link is easily changed, so plan to have a good stare at a few years and see if there appears to be a trend, remembering that this year there is more ice to melt, and that means it's the sum not the detail that matters.

Some cooling on the EAIS also appears to be connected with the ABS sea ice trends, likely through organized patterns of atmospheric circulation changes.

Small additional biases, discussed above, from changes in sea ice and differences in warming rates of SST and air just above the open ocean (which it appears the Cowtan and Way dataset does not adjust for) might push up the bias marginally.

In addition, a study commissioned by Canada's Fisheries and Oceans Department examined the relationship between air temperature and sea ice coverage, concluding, «the possible impact of global warming appears to play a minor role in changes to Arctic sea ice.»

And ironically it appears to be that tiny 0.01 W m - 2 orbital forcing that accounts for most of the visible changes in climate - i.e. the melting of mid-high latitude ice - reminding us again that treating the earth as a 0 - dimensional model responding to changes in the global average forcing doesn't make sense.

«This is not a case of thicker ice appearing in one region simultaneously with thinner ice appearing in another, induced perhaps by a change in surface winds or other transient conditions,» Dr. Rothrock said, noting that the decrease was widespread in the central Arctic Ocean, and most pronounced in the eastern Arctic.

Internal memorandums circulated in the Alaskan division of the Federal Fish and Wildlife Service appear to require government biologists or other employees traveling in countries around the Arctic not to discuss climate change, polar bears or sea ice if they are not designated to do so.

Since there is about a 80ppm change in atmospheric CO2 that lags «GMST» and that doesn't appears to be due to southern hemisphere variations, the THC and NH sea ice extent could be the link between the lag of CO2 to Temperature.

This would explain why abrupt changes of the AMOC appear to be pervasive features of the paleoclimate record when vast reservoirs of freshwater were available in the form of ice and proglacial lakes on land.

Lockwood is merely pointing out that there appears to be a regime change in the dynamics of the solar cycle, and that this regime change could plunge us into a little ice - age of the type associated with the Maunder minimum.

Based on the understanding of both the physical processes that control key climate feedbacks (see Section 8.6.3), and also the origin of inter-model differences in the simulation of feedbacks (see Section 8.6.2), the following climate characteristics appear to be particularly important: (i) for the water vapour and lapse rate feedbacks, the response of upper - tropospheric RH and lapse rate to interannual or decadal changes in climate; (ii) for cloud feedbacks, the response of boundary - layer clouds and anvil clouds to a change in surface or atmospheric conditions and the change in cloud radiative properties associated with a change in extratropical synoptic weather systems; (iii) for snow albedo feedbacks, the relationship between surface air temperature and snow melt over northern land areas during spring and (iv) for sea ice feedbacks, the simulation of sea ice thickness.

The fact that polar ice is disappearing faster than predicted from the models along with permafrost decline and more besides seem to indicate to many climate scientists (who incidently appear profously in the Fred Pearce book — the last generation) that human induced climate change is happenning faster than can be explained by the primarily linear models.

The fact that the earth appears to have gone through huge changes in atmospheric CO2 concentration over geologic eras, while the estimated temps went from 12degC to 22 deg C regardless of «Snowball Earth» or «Cretaceous Hot House» with both hot and cold periods occurring during both high and low CO2 regimes and both with and without ice caps argues very strongly that we do not understand the climate mechanism at all.

Indeed, the suggestion appears to be that a cometary barrage causes various kinds of havoc, including the ice sheet collapse that led to ocean circulation change (the most well - evidenced proximal cause of rapid climate change).

Ignoring the possible increase of «methane from permafrost» with warming for now, it appears that NSIDC data tell us a) that northern hemisphere snow cover has not shown any statistical change since the 1980s, b) that Arctic sea ice has shrunk since measurements started in 1979 and c) that Antarctic sea ice has grown gradually over this period.

Apart from climate change and humidity, elevation also appears to play a critical role in the lifespan of glaciers, which are large persistent bodies of ice.

Sitting at high elevation in the tropics, the Quelccaya ice cap appears to be extremely sensitive to the temperature changes, several scientists said.

Studies based on satellite observations do not provide unequivocal evidence concerning the mass balance of the East Antarctic ice sheet; some appear to indicate marginal thickening (Davis et al., 2005), while others indicate little change (Zwally et al., 2005; Velicogna and Wahr, 2006; Wingham et al., 2006).