We had 140 m from the last Ice Age until now, so we have 1/3
of the glacier volume of the Ice Age left at this point, which is a lot.
A total of over 5,000 measurements
of glacier volume and mass changes since 1850 and more than 42,000 records from observations and reconstructions dating back to the sixteenth century were analyzed.
Not exact matches
' «In the final
volume, The Big Chunk
of Ice, the boys thwart a jewel heist when the professor flies them to Europe in his blimp to look at a
glacier.
The ocean conveyor system, Rutgers scientists believe, changed at the same time as a major expansion in the
volume of the
glaciers in the northern hemisphere as well as a substantial fall in sea levels.
From those readings, researchers can calculate the
volume of meltwater coming from the
glacier.
Analysis
of the data showed that despite isolated cases where ice
volume and thickness increased, none
of the advancing
glaciers have come close to the maximums achieved during the so - called «Little Ice Age» — a period
of cooling between the sixteenth and the nineteenth century.
Losing half its
volume and retreating more than 1.5 kms, the shrinking
glacier has left a moonscape
of rocky moraines in its wake.
Specifically,
glaciers in the Everest region
of the Himalayas could lose between 70 percent and 99 percent
of their
volume through the 21st century.
And it's also important to remember that, while sea ice is increasing in Antarctica,
glaciers and ice shelves are all melting rapidly, producing large
volumes of fresh water.
This particular
volume on mummified corpses deals with the science
of glaciers as well as stories
of scientists and explorers who have traveled the
glaciers — and often discovered bodies from the past.
Naturally, one can do better with measurements
of subsurface ocean temperatures and
glacier volume (which affects latent heat content
of the Earth), but the surface temperature does pretty well for a start.
It is tough to get a firm indication
of total global alpine
glacier volumes, but assuming that the global total is 100 times that in Europe (a wildly high estimate), if they were all to melt that would imply a global sea level rise
of less than one inch.
.0012 sv for Jakobshavns Isbrae the
glacier with the greatest
volume of flow in Greenland.
The 930 major European alpine
glaciers have a total
volume of about 70 cubic kilometers currently (according to Paul et al.).
From my perspective the interesting item you raise with both the Zwally and Jakobshavn effects is the persistent increase in the
volume of water moving under, over and through these
glaciers.
# 49 The contribution
of these large
glaciers seems just that in terms
of ice and water
volume, but put in the context
of sverdrups, is another question.
In this blink
of time the
volume of glaciers in the Western United States has declined between 20 and 30 %.
On decadal and longer time scales, global mean sea level change results from two major processes, mostly related to recent climate change, that alter the
volume of water in the global ocean: i) thermal expansion (Section 5.5.3), and ii) the exchange
of water between oceans and other reservoirs (
glaciers and ice caps, ice sheets, other land water reservoirs - including through anthropogenic change in land hydrology, and the atmosphere; Section 5.5.5).
Research has shown that
glaciers around the world have been retreating at unprecedented rates, and Alaska, which has only 5 percent
of the total ice Greenland has, lost a
volume of ice equal to nine states 3 feet thick between 2004 and 2007 alone.
For instance, if global warming were to increase the
volume of water in the oceans by causing
glaciers or other ice bodies to melt, this would cause the weight
of water in the oceans to increase.
Glaciers change the strength
of the skin rather than the contained
volume, but the mechanical effect on the strength
of the structure is the same How thick is the skin
of a rocket booster held rigid by pressure
of the fuel inside?
The IPCC projections
of sea level rise are based largely on the slow, steady and inexorable thermal expansion
of the oceans (as water heats, its
volume increases) with some additional contributions from the melting
of mountain
glaciers (almost all
of which are expected to be gone by mid century).
«Nonetheless, Jacob and colleagues have dramatically altered our understanding
of recent global (
glacier and ice cap)
volume changes, and their contribution to sea - level rise,» Bamber wrote, referring to study researcher Thomas Jacob
of Colorado - Boulder.
Sorry — there is a fairly basic approximate
volume calculation and a broad estimate
of current ice sheet (not
glacier) losses.
Covering an area
of 30,000 km2 and 48 %
of BC's gauged systems
glacier - melt moderates inter-annual variability in streamflow and helps to maintain higher runoff
volume in times
of extreme warm and dry conditions.
Volume loss
of BC
glaciers over the 1985 - 1999 was found to be occurring at a rate
of 22.48 ± 5.53 km3 per year.
Since 1850 the
glaciers of the European Alps have lost about 30 to 40 % of their surface area and about half of their volume... glaciers in the New Zealand Southern Alps have lost 25 % of their area over the last 100 years... Glaciers on Mt. Kenyan and Kilimanjaro have lost over 60 % of their area in the last century...» — Union of Concerned Scientists web si
glaciers of the European Alps have lost about 30 to 40 %
of their surface area and about half
of their
volume...
glaciers in the New Zealand Southern Alps have lost 25 % of their area over the last 100 years... Glaciers on Mt. Kenyan and Kilimanjaro have lost over 60 % of their area in the last century...» — Union of Concerned Scientists web si
glaciers in the New Zealand Southern Alps have lost 25 %
of their area over the last 100 years...
Glaciers on Mt. Kenyan and Kilimanjaro have lost over 60 % of their area in the last century...» — Union of Concerned Scientists web si
Glaciers on Mt. Kenyan and Kilimanjaro have lost over 60 %
of their area in the last century...» — Union
of Concerned Scientists web site, 2016
The melting
of Greenland, Antarctica, mountain
glaciers around the globe, and the corresponding expansion
of the
volume of the ocean as it warms, are expected to increase their pace.
(2012), Ice
volume and subglacial topography for western Canadian
glaciers from mass balance fields, thinning rates, and a bed stress model: Journal
of Climate, doi: 10.1175 / JCLI - D -12-00513.1.
It is impossible to even estimate the total
volume of glaciers.
Carr, J. (2014) Recent retreat
of major outlet
glaciers on Novaya Zemlya, Russian Arctic, influenced by fjord geometry and sea - ice conditions Journal
of Glaciology,
Volume 60, pp. 155 - 170 (16)
In the Arctic, there has been increased Eurasian river discharge to the Arctic Ocean, and continued declines in the ice
volume of Arctic and sub-Arctic
glaciers and the Greenland ice sheet (very high confidence).
The «second order» review draft
of the SPM for the Working Group II
volume said «If current warming rates are maintained Himalayan
glaciers could decay at very rapid rates, shrinking from the present 500,000 km2 to 100,000 km2 by the 2030s.»
Their projections show a reduction
of about 70 % in
glacier volume by the year 2100 compared to 2005, with the largest losses occurring around 2020 to 2040.
They are limited only by the amount
of water the
glaciers themselves release — ice masses that hold
volumes of water often measured in cubic kilometers.
From there could you possibly make the giant leap
of calculating the total
volume of the world's
glaciers vs. the total surface
of the earth's ocean and seas and realize how small an impact
of their melting would have upon the sea level?
It is home to about half
of the
volume of the Himalayan
glaciers.
Loss
of glacial
volume in Alaska and neighboring British Columbia, Canada, currently contributes 20 % to 30 % as much surplus freshwater to the oceans as does the Greenland Ice Sheet — about 40 to 70 gigatons per year, 66,78,63,57,64,58 comparable to 10 %
of the annual discharge
of the Mississippi River.79
Glaciers continue to respond to climate warming for years to decades after warming ceases, so ice loss is expected to continue, even if air temperatures were to remain at current levels.
Satellite remote sensing has revolutionized the ability to monitor the surface
of West Antarctica in recent decades, providing unprecedented streams
of data on
glacier volume and velocity.
In all
of these simple models, we assume the atmosphere to have a
volume as fixed as a bathtub, we assume that the atmosphere / ocean system is a closed system, we assume that the incoming radiation from the Sun is constant, we assume no turbulence, we assume no viscosity, we assume radiative equilibrium with no feedback lag, we take no account
of water vapor flux assuming it to be constant, no change in albedo from changes in land use,
glacier lengthening and shortening, no volcanic eruptions, no feedbacks from vegetation.
LONDON, 2 June, 2015 − The
glaciers of the Everest region
of the Himalayan massif — home to the highest peak
of all — could lose between 70 % and 99 %
of their
volume as a result
of global warming.
To say nothing
of the warming trends also noticed in, for example: * ocean heat content * wasting
glaciers * Greenland and West Antarctic ice sheet mass loss * sea level rise due to all
of the above * sea surface temperatures * borehole temperatures * troposphere warming (with stratosphere cooling) * Arctic sea ice reductions in
volume and extent * permafrost thawing * ecosystem shifts involving plants, animals and insects
In the period 1992 to 2005, the
glacier suffered a loss
of 90 %
of its surface area, and 97 %
of its
volume of ice (Berger et al., 2005).
Hence the above velocity map
of the
glacier will indicate higher average velocities in the quadrants with the highest calving
volume flux.
The Hindu: «The Gangotri
glacier is retreating like other
glaciers in the Himalayas and its
volume and size are shrinking as well,» a report, titled «Estimation
of retreat rate
of Gangotri
glacier using rapid static and kinematic GPS survey», by scientists from the Almora - based G.B. Pant Institute
of Himalayan Environment and Development has stated.
«This allows us to get a better picture
of projected regional ice
volume change and potential impacts on local water supplies, and changes in
glacier size distribution,» Radic said.
An international team led by glaciologists from the University
of Colorado Boulder and Trent University in Ontario, Canada has completed the first mapping
of virtually all
of the world's
glaciers — including their locations and sizes — allowing for calculations
of their
volumes and ongoing contributions to global sea rise as the world warms.
«Every piece
of valid evidence â $» long - term temperature averages that smooth out year - to - year fluctuations, Arctic sea ice
volume, melting
of glaciers, the ratio
of record highs to record lows â $» points to a continuing, and quite possibly accelerating, rise in global temperatures.
This latter assumption may need to be adjusted if
glaciers and ice caps in the Eocene had a
volume of tens
of metres
of sea level.
North Cascade
glaciers annual balance has averaged -0.54 m / a
of water equivalent from 1984 - 2006, a cumulative loss
of over 12.4 m in
glacier thickness or 20 - 40 %
of their total
volume since 1984 due to negative mass balances.