Sentences with phrase «ice fields changes»

Not exact matches

Even weather control is not as incredible as it sounds, for there is a delicate energy balance which can be changed by thin films on lakes and ice fields, or by air - borne particles.

Again, while I am not a scientist or medical doctor, I don't necessarily agree, especially if the amount of what Bob Cantu calls «total brain trauma» can be significantly reduced through a combination of limits on full - contact practices and / or hit counts, rule changes, and if we do a better job of identifying concussive injury to get concussed players off the field (or ice, or field, or court, or pitch), and and hold kids out longer before they are allowed to return to play so the risk of reinjury is reduced as much as reasonably possible.

The ice loss is already enough for satellites to detect changes in Earth's gravity field.

Their field - based data also suggest that during major climate cool - downs in the past several million years, the ice sheet expanded into previously ice - free areas, «showing that the ice sheet in East Greenland responds to and tracks global climate change,» Bierman says.

Rising global temperatures, ice field and glacial melting and rising sea levels are among the climatic changes that could ultimately lead to the submergence of coastal areas that are home to 1.3 billion people today, according to the report, published online today by the journal Nature Climate Change.

«The three areas that can trigger large changes in the earth's gravitational field are oceans, polar and glacial ice and atmosphere,» Cox explains.

«Based on the UN climate panel's report on sea level rise, supplemented with an expert elicitation about the melting of the ice sheets, for example, how fast the ice on Greenland and Antarctica will melt while considering the regional changes in the gravitational field and land uplift, we have calculated how much the sea will rise in Northern Europe,» explains Aslak Grinsted.

The second is the gravity method, which utilizes NASA's GRACE satellite pair to essentially weigh the ice sheets from space (it measures minute changes in their flight path due to the shifting gravity field of mass below).

To understand sea - level change means understanding not only the transfer of land ice into the ocean, but also, for example, how the gravitational field of the Earth changes as inconceivably large water volumes shift around the planet.

We use data from space, the field, and computer simulations to understand ice and climate change - now and in the future.

Wind fields are capable of great volatility and very rapid global - scale teleconnections, and they are efficient generators of oceanic circulation changes and (more speculatively) of multiple states relative to great ice sheets.

The redistribution of ice - water on the surface of the Earth and the flow of mantle rocks causes the gravitational field and the moment of inertia of the Earth to change.

This spring, NASA and the German Research Centre for Geosciences are scheduled to launch the Gravity Recovery and Climate Experiment Follow - On (GRACE - FO) mission, twin satellites that will continue the original GRACE mission's legacy of tracking fluctuations in Earth's gravity field in order to detect changes in mass, including the mass of ice sheets and aquifers.

The latter is almost linearly related to changes in ice sheet volume; the former, however, is influenced by a range of factors, including atmosphere / ocean dynamics and changes in Earth's gravitational field, rotation, and crustal and the mantle deformation associated with the redistribution of mass between land ice and the ocean.

The ability to ice the kicker matches the challenge in today's critical field goal attempts, while new elements of risk and reward through trick plays and blocked kicks can now change the outcome of any game in one play.

Multi-panel paintings in oil and smaller paintings on canvas and aluminum formats explore the tundra fragmented into puddles and bits of ice with small cascades flowing over the rocks, reminders of accelerated seasonal changes melting ice fields and sea ice.

Regional variations arise because the Earth's gravity field is affected in multiple ways by the melt of ice, due to the direct effect of surface mass changes (the gravity field is determined by the distribution of mass), the consequent deformation of the Solid Earth (removing a load causes the Earth's surface to rebound, which in turn changes the distribution of the Earth's mass), the consequent redistribution of ocean water (the ocean surface is shaped by the gravity filed) and perturbations of the Earth's rotation axis (because of mass redistribution).

And there are some other factors as well, like changing ocean currents or changes in the gravitational field (due to melting continental ice).

In probing the fast - changing ice sheets of Antarctica and Greenland, Gordon Hamilton of the University of Maine exemplified the qualities in the rare breed of scientists, engineers and field staff willing to go to extremes — literally — to help clarify the pace at which seas will rise as warming glacial ice melts.

But as a starting point, I'll propose now — and I'll change this if they disagree — the names of some leading scientists in this field who would NOT say there is sufficient evidence to conclude that human - caused global warming IS the main cause of increasing summer retreats of sea ice (although they would say there is strong likelihood that it will eventually dominate):

Much of the team's analysis was conducted using data from two different satellites - ICEStat, and GRACE which measure changes in ice mass using lasers and change in the earth's gravimetric field respectively.

Fluctuations in solar activity, including magnetic field - powered sunspots and solar flares, have been linked to past changes in climate, including, controversially, the Little Ice Age.

From 1899 to 1962, those ice fields more exposed to direct solar radiation «wasted drastically» while those in narrow, shaded grooves changed very little, said Dr. Stefan L. Hastenrath, a professor emeritus at the University of Wisconsin, who is a longstanding expert on African glaciology.

Actually Fielding's use of that graph is quite informative of how denialist arguments are framed — the selected bit of a selected graph (and don't mention the fastest warming region on the planet being left out of that data set), or the complete passing over of short term variability vs longer term trends, or the other measures and indicators of climate change from ocean heat content and sea levels to changes in ice sheets and minimum sea ice levels, or the passing over of issues like lag time between emissions and effects on temperatures... etc..

Besides emissions of greenhouse gases, humans are constantly changing their environment which does have an impact (e.g. turning a corn field into an asphalt parking lot or massive deforestation in the world's major tropical rainforests or laying down a carpet of black soot on ice sheets).

Glacier National Park has lost two more of its namesake moving ice fields to climate change, which is shrinking the rivers of ice until they grind to a halt, a government researcher said Wednesday.

Explorers of the Antarctic have powerfully impacted research in the field, suggesting that the area of sea ice found around Antarctica has hardly changed in size during the last century.

Note that regional proxies, such as the oxygen - isotope temperature reconstructions from the Greenland Ice Core Project that record Dansgaard - Oeschger events, often indicate faster regional rates of climate change than the overall global average for glacial - interglacial transitions, just as today warming is more pronounced in Arctic regions than in equatorial regions (Barnosky et al., 2003; Diffenbaugh and Field, 2013).

The study is the first to observe the increase in the crevasse fields and consider how these changes may influence the movement of the ice, according to William Colgan, the report's lead author.

Consider the facts: the climate system is indicated to have left the natural cycle path; multiple lines of evidence and studies from different fields all point to the human fingerprint on current climate change; the convergence of these evidence lines include ice mass loss, pattern changes, ocean acidification, plant and species migration, isotopic signature of CO2, changes in atmospheric composition, and many others.

In a new study, researchers have observed an expansion of the crevasse fields in one portion of the Greenland ice sheet, a change that they suggest may influence how the ice sheets move toward the ocean and raise sea levels.

sea was converted to land and agriculture, heather fields to forests and since 1.5 century industrialization, increased population and transport... The local offset (~ 40 ppmv in Giessen, SW Germany) can be calibrated away by comparing the stomata data to direct measurements and ice cores in the previous century, but nobody knows the influence of land use changes in the main wind directions and of changes in the main wind directions themselves (MWP - LIA) in the course of the centuries.

In light of trends showing a likely 3 °C or more global temperature rise by the end of this century (a figure that could become much higher if all feedback processes, such as changes of sea ice and water vapor, are taken into account) that could result in sea level rises ranging from 20 to 59 cm (again a conservative estimation), Hansen believes it is critical for scientists in the field to speak out about the consequences and rebuke the spin offered by pundits who «have denigrated suggestions that business - as - usual greenhouse gas emissions may cause a sea level rise of the order of meters.»

Because of changes in Earth's gravity field resulting from ice sheet mass loss, ocean sea level will actually drop near the areas of melt and rise elsewhere.

1950s: Research on military applications of radar and infrared radiation promotes advances in radiative transfer theory and measurements = > Radiation math — Studies conducted largely for military applications give accurate values of infrared absorption by gases = > CO2 greenhouse — Nuclear physicists and chemists develop Carbon - 14 analysis, useful for dating ancient climate changes = > Carbon dates, for detecting carbon from fossil fuels in the atmosphere, and for measuring the rate of ocean turnover = > CO2 greenhouse — Development of digital computers affects many fields including the calculation of radiation transfer in the atmosphere = > Radiation math, and makes it possible to model weather processes = > Models (GCMs)-- Geological studies of polar wandering help provoke Ewing - Donn model of ice ages = > Simple models — Improvements in infrared instrumentation (mainly for industrial processes) allow very precise measurements of atmospheric CO2 = > CO2 greenhouse.

I am not sure why the response to the hypothesis that changes in the intensity of the geomagnetic field, triggers / controls the timing of the ice ages in this forum was «rubbish».

The rubbish comment noted that geomagnetic field intensity changes do not correlate with the ice age cycles.