Sentences with phrase «land ice»

Planning for a large sea level change, perhaps on the order of 1 meter in a century, requires reliable projections of the contributions from land ice.

Surely the issue relating to the mass of the ice sheet in the case of on - land ice sheets is precipitation as well as temperature.

A number of potential feedbacks, such as land ice cover, vegetation cover and ocean heat transport were held fixed in these experiments.

First, shrinking land ice, such as mountain glaciers and polar ice sheets, is releasing water into the oceans.

Second, melting land ice flows into the ocean, also increasing sea level across the globe.

For the number below to happen that more land ice will have to melt than is currently projected.

When land ice melts, it flows as water into the ocean, contributing to sea - level rise.

And as they fall apart, the flow of land ice toward the sea accelerates, speeding up sea - level rise.

Should coastal planners have concern over where land ice is melting?

Unlike land ice, floating sea ice doesn't affect sea levels when it melts and freezes.

Permanent land ice is the defining feature of an ice age.

I think the reason is physics: the warmer it gets, the faster sea - level rises, because for example land ice melts faster.

In summary the melting of land ice floating on the ocean will introduce a volume of water greater than that of the originally displaced sea water, hence raising the water level a little.

If CO2 rises much faster in this century than the last, decreasing land ice can be expected to contribute more strongly to rising sea levels than to date.

When sea ice is gone, that is when land ice grows the fastest.

So is melting of glaciers and other land ice that contribute to rising sea levels.

Ice shelves grow through a combination of land ice flowing to the sea and snow falling on their surfaces.

The second reconstruction uses satellite gravity measurements to calculate the change in mass of land ice and land water.

Measuring changes in Antarctic land ice mass has been a difficult process due to the ice sheet's massive size and complexity.

Kargel is the international coordinator of Global Land Ice Measurements From Space, a satellite program dedicated to photographing each glacier on Earth every year.

That size cutoff is standard practice,» says Bruce Raup of the University of Colorado in Boulder, who is also director of the Global Land Ice Measurements from Space project, an international glacier monitoring project.

There are of course uncertainties in the estimation methods but independent data from multiple measurement techniques (explained here) all show the same thing, Antarctica is losing land ice as a whole, and these losses are accelerating quickly.

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 traditional view of the loss of land ice on Earth has been that mountain glaciers and ice caps are the dominant contributors, and ice sheets are following behind,» said study co-author Eric Rignot, a glaciologist at NASA's Jet Propulsion Laboratory and the University of California, Irvine.

There are three main components to this total forcing, of roughly equal magnitude: land ice albedo, land elevation and WMGHGs.

Correcting this situation requires a predictive understanding of the processes responsible for land ice loss.

In contrast to the polar regions, the network of lower latitude small glaciers and ice caps, although making up only about four percent of the total land ice area or about 760,000 square kilometers, may have provided as much as 60 percent of the total glacier contribution to sea level change since 1990s (Meier et al. 2007).

Figure 2: Estimates of total Antarctic land ice changes and approximate sea level contributions using a combination of different measurement techniques (Shepherd, 2012).

These lines were labelled «All SRES envelope including land ice uncertainty» in the TAR SPM and extended the range up to 88 cm, adding 18 cm at the top end.

The corresponding future temperatures in Greenland are comparable to those inferred for the last interglacial period 125,000 years ago, when paleoclimatic information suggests reductions of polar land ice extent and 4 to 6 m of sea level rise.

The accelerating melting of land ice into the sea makes the surface of the ocean around Antarctica colder, less salty and more easily frozen, leading to extensive sea ice in some areas.

For instance, the sensitivity only including the fast feedbacks (e.g. ignoring land ice and vegetation), or the sensitivity of a particular class of climate model (e.g. the «Charney sensitivity»), or the sensitivity of the whole system except the carbon cycle (the Earth System Sensitivity), or the transient sensitivity tied to a specific date or period of time (i.e. the Transient Climate Response (TCR) to 1 % increasing CO2 after 70 years).

Some people say the Snowball did cause global sea icecover, and essentially global land ice cover.

Note that the observed sea level rise tends to follow the uppermost dashed line of the IPCC scenarios, namely the one «including land ice uncertainty», see first Figure.

The corresponding future temperatures in Greenland (1.9 to 4.6 °C global) are comparable to those inferred for the last interglacial period 125,000 years ago, when palaeoclimatic information suggests reductions of polar land ice extent and 4 to 6m of sea level rise.

Therefore, how is Antarctic land ice doing?