The total global ice mass lost from Greenland, Antarctica and Earth's glaciers and ice caps during the study period was about 4.3 trillion tons (1,000 cubic miles), adding about 0.5 inches (12 millimeters) to global sea level.
Not exact matches
Since 1995, researchers found that Greenland has lost a
total of about 4,000 gigatons of
ice, which has become the biggest single contributor to the rise in
global sea levels.
The Greenland
ice sheet is thought to be one of the largest contributors to
global sea level rise over the past 20 years, accounting for 0.5 millimeters of the current
total of 3.2 millimeters of sea level rise per year.
Rising
global temperatures have also made glaciers —
ice masses that currently occupy nearly 10 percent of the world's
total land area — increasingly unstable.
The Greenland
ice sheet (GIS) has been melting so slowly and so negligibly in recent decades that the entire
ice sheet's
total contribution to
global sea level rise was a mere 0.39 of a centimeter (0.17 to 0.61 cm) between 1993 and 2010 (Leeson et al, 2017).
Pine Island Glacier could collapse — stagnate and retreat far up into the bay, resulting in rapid sea level rise — within the next few centuries, raising
global sea levels by 1.5 m11, 12, out of a
total of 3.3 m from the entire West Antarctic
Ice Sheet13.
The most exciting thing is we'll get a chance to see the relative strength of all of these over the next few years, and it will most interesting to compare the
total decade of 2010 - 2019 to previous decades in terms of the trends in Arctic Sea
ice,
Global Temps, and of course, OHC.
The
total 2000 — 2008 mass loss of ~ 1500 gigatons, equivalent to 0.46 millimeters per year of
global sea level rise, is equally split between surface processes (runoff and precipitation) and
ice dynamics.
Thus, the concept of an emissions budget is very useful to get the message across that the amount of CO2 that we can still emit in
total (not per year) is limited if we want to stabilise
global temperature at a given level, so any delay in reducing emissions can be detrimental — especially if we cross tipping points in the climate system, e.g trigger the complete loss of the Greenland
Ice Sheet.
Having said that, it is a really small effect — if the entire Arctic summer sea
ice pack melted (average thickness 2 metres, density ~ 920 kg / m3, area 3 × 10 ^ 6 km ^ 2 (0.8 %
total ocean area) = > a 4.5 cm rise instantly which implies a
global sea level rise of 0.36 mm.
Interesting you cut - off
total ice extents at 2012, especially since the
total extent of Arctic sea
ice has actually increased since then, and in fact the Antarctic
ice extents are at a RECORD MAXIMUM — so things aren't always what they appear to be in a very complex system known as
global climate.
As the rate of
ice loss has accelerated, its contribution to
global sea level rise has increased from a little more than half of the
total increase from 1993 - 2008 to 75 - 80 percent of the
total increase between 2003 - 2007.
Jim, you might consider whether or not
total sea
ice is a good indicator of the relationship between CO2 and
global temperature.
And the
global total amount of sea
ice is above normal.
Total global snow /
ice / albedo effects of course encompass far more than the Arctic sea.
Cloud variations are obviously an important element on a
global scale, but the effects of Arctic
ice melting are important locally and also a non-trivial fraction of
global albedo feedbacks, which are a contributor to
total feedback that is smaller than those from water vapor and probably from cloud feedbacks, but not insignificant.
And while you are doing that, davie, you might tell us in your own words how less than 1c warming since the end of the little
ice age and the beginning of the industrial revolution, measured with ever changing systems in areas of exponential land use change by people who have a
total, consensual belief in
global warming by ACO2 and no demonstrable scientific scepticism whatsoever, must constitute a «bad thing», awa being scientifically based and believable.
I have to add that another graph has been making the rounds, showing the
total global sea
ice extent.
Kjær, Kjeldsen and Korsgaard's team shows that the
ice sheet «contributed substantially to sea level rise throughout the 20th century, providing at least 25 ± 9.4 millimeters of the
total global mean rise,» writes Csatho, an associate professor of geology in UB's College of Arts and Sciences, in her News and Views analysis.
«A peer - reviewed paper [Krivova et al.] published in the Journal of Geophysical Research finds that reconstructions of
total solar irradiance (TSI) show a significant increase since the Maunder minimum in the 1600's during the Little
Ice Age and shows further increases over the 19th and 20th centuries... Use of the Stefan - Boltzmann equation indicates that a 1.25 W / m2 increase in solar activity could account for an approximate.44 C
global temperature increase... A significant new finding is that portions of the more energetic ultraviolet region of the solar spectrum increased by almost 50 % over the 400 years since the Maunder minimum... This is highly significant because the UV portion of the solar spectrum is the most important for heating of the oceans due to the greatest penetration beyond the surface and highest energy levels.
published in the Journal of Geophysical Research finds that reconstructions of
total solar irradiance (TSI) show a significant increase since the Maunder minimum in the 1600's during the Little
Ice Age and shows further increases over the 19th and 20th centuries... Use of the Stefan - Boltzmann equation indicates that a 1.25 W / m2 increase in solar activity could account for an approximate.44 C
global temperature increase... A significant new finding is that portions of the more energetic ultraviolet region of the solar spectrum increased by almost 50 % over the 400 years since the Maunder minimum... This is highly significant because the UV portion of the solar spectrum is the most important for heating of the oceans due to the greatest penetration beyond the surface and highest energy levels.
However, despite this, the team reckon to have perhaps isolated a «
global warming» signal in the accelerated run off of the Greenland
Ice Mass — but only just, because the runoff at the edges is balanced by increasing central mass — again, they focus upon recent trends — a net loss of about 22 cubic kilometres in total ice mass per year which they regard as statistically not significant — to find the «signal», and a contradiction to their ealier context of air temperature cycl
Ice Mass — but only just, because the runoff at the edges is balanced by increasing central mass — again, they focus upon recent trends — a net loss of about 22 cubic kilometres in
total ice mass per year which they regard as statistically not significant — to find the «signal», and a contradiction to their ealier context of air temperature cycl
ice mass per year which they regard as statistically not significant — to find the «signal», and a contradiction to their ealier context of air temperature cycles.
Perhaps with all that is known now, someone will propose a well - defined multivariate test entailing all relevant
global data (including Antarctic
ice extent and
total Antarctic
ice mass, mean and extremal rainfall everywhere, mean and extremal cyclonic storms everywhere.)
In combination with the low Arctic sea
ice extent for November, this produced a remarkably low
global sea
ice total.
A
total absence of
ice in the Arctic would not just affect local wildlife and indigenous communities but could also have huge implications for the
global climate.
The Greenland
ice sheet (GIS) has been melting so slowly and so negligibly in recent decades that the entire
ice sheet's
total contribution to
global sea level rise was a mere 0.39 of a centimeter (0.17 to 0.61 cm) between 1993 and 2010 (Leeson et al, 2017).
droughts, floods, hurricanes, tornadoes,
global ice cover, and rainfall are about the same (maybe a slight increase in
total rainfall); forests and all other vegetation that has been studied are growing faster; actual effects of putative ocean pH change are negligible to non-existent.
All of these characteristics (except for the ocean temperature) have been used in SAR and TAR IPCC (Houghton et al. 1996; 2001) reports for model - data inter-comparison: we considered as tolerable the following intervals for the annual means of the following climate characteristics which encompass corresponding empirical estimates:
global SAT 13.1 — 14.1 °C (Jones et al. 1999); area of sea
ice in the Northern Hemisphere 6 — 14 mil km2 and in the Southern Hemisphere 6 — 18 mil km2 (Cavalieri et al. 2003);
total precipitation rate 2.45 — 3.05 mm / day (Legates 1995); maximum Atlantic northward heat transport 0.5 — 1.5 PW (Ganachaud and Wunsch 2003); maximum of North Atlantic meridional overturning stream function 15 — 25 Sv (Talley et al. 2003), volume averaged ocean temperature 3 — 5 °C (Levitus 1982).
You can't reference actual evidence that the
total amount of
global ice is increasing because it is not true.
«All 18 periods of significant climate changes found during the last 7,500 years were entirely caused by corresponding quasi-bicentennial variations of [
total solar irradiance] together with the subsequent feedback effects, which always control and totally determine cyclic mechanism of climatic changes from
global warming to Little
Ice Age.»
The melting contributes to about 1 % of the
global sea level rise — a small contribution and only 3 — 4 % of the
total contribution from
global glaciers and
ice caps.
Overall
total global sea
ice has been rising robustly over the past four years.
RE: 4th Error -RCB- Poses an objection to the non-scientific term catastrophic [NOTE: Scientific «consensus» is often being used & / or implied in standard climate - change discourse - Yet Consensus is a Political Term - NOT a Scientific Term]- HOWEVER - When Jim Hansen, the IPCC & Al Gore, et - al - go from predicting 450 — 500 ppm CO2 to 800 — 1000ppm by the end of the 21st century -LCB- said to the be highest atmospheric CO2 content in 20 — 30 Million YRS -RCB-; — & estimates for aver
global temps by 21st century's end go from 2 * C to 6 * C to 10 * C; — & increased sea level estimates go from 10 - 20 cm to 50 - 60 cm to 1M — 2M -LCB- which would totally submerge the Maldives & partially so Bangladesh -RCB-; — predictions of the
total melting of the Himalayan
Ice caps by 2050, near total melting of Greenland's ice sheet & partial melting of Antarctica's ice sheet before the 21st century's end; — massive crop failures; — more intense & frequent hurricane -LCB- ala Katrina -RCB- for much longer seasonal durations, etc, etc, etc... — IMO That's Sounds pretty damned CATASTROPHIC to
Ice caps by 2050, near
total melting of Greenland's
ice sheet & partial melting of Antarctica's ice sheet before the 21st century's end; — massive crop failures; — more intense & frequent hurricane -LCB- ala Katrina -RCB- for much longer seasonal durations, etc, etc, etc... — IMO That's Sounds pretty damned CATASTROPHIC to
ice sheet & partial melting of Antarctica's
ice sheet before the 21st century's end; — massive crop failures; — more intense & frequent hurricane -LCB- ala Katrina -RCB- for much longer seasonal durations, etc, etc, etc... — IMO That's Sounds pretty damned CATASTROPHIC to
ice sheet before the 21st century's end; — massive crop failures; — more intense & frequent hurricane -LCB- ala Katrina -RCB- for much longer seasonal durations, etc, etc, etc... — IMO That's Sounds pretty damned CATASTROPHIC to ME!
Current
total ice - loss in Greenland is running at an estimated 200 Gte / yr and Antarctica at 150 Gte / yr (with
ice mass gain in the east and loss in the west — with some estimates of a net gain)-- at that rate of 1mm / yr, by 2100 the
global ice - loss would raise sea level by a little over 3 inches.
Scientific records over the past million years show that as periodic
ice ages ended,
global average temperatures rose a
total of 4 - 7 degrees Celsius over the course of about 5,000 years.
Arctic and
global sea
ice totals have moved consistently downward over 38 years.
But one modeling study put the threshold level for the eventual near - complete loss of Greenland's
ice sheet at a local warming of just 2.7 C — which, due to Arctic amplification, means a
global warming of only 1.2 C.
Total melting of Greenland — luckily, something that would likely take centuries — would raise sea levels by 7 meters, submerging Miami and most of Manhattan, as well as large chunks of London, Shanghai, Bangkok and Mumbai.
So the fact remains, the
total global see
ice coverage is above average.
The point is that, objectively speaking, based on actual data, not model data or nursery stories, the
total global sea
ice coverage is currently above average.