Sentences with phrase «about global sea ice»

Not exact matches

This year's Arctic sea ice cover currently is the sixth - lowest on modern record, a ranking that raises ongoing concerns about the speed of ice melt and the effects of ice loss on global weather patterns, geopolitical fights, indigenous peoples and wildlife, scientists said yesterday.

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 last glacial maximum was about 18,000 years ago, when the Patagonian ice sheet expands to include about 10 meters [33 feet] of global sea level.

If all of Greenland's ice were to melt, global sea levels would rise about six meters; if all of Antarctica went, it would contribute about 60 meters.

In comparison, global sea levels are rising by about 3 millimetres a year, and a recent study estimated that one - third of that comes from ice loss in Antarctica and Greenland.

A new review analyzing three decades of research on the historic effects of melting polar ice sheets found that global sea levels have risen at least six meters, or about 20 feet, above present levels on multiple occasions over the past three million years.

The study also finds that the Greenland ice sheet may contain more ice, with a greater potential to raise global sea levels, than previous research has suggested — about 2.75 inches more, to be exact.

Altogether, the new study suggests that the ice sheet has the potential to raise global sea levels by about 24.3 feet, should it melt entirely.

When you're talking about global warming and melting ice caps, as everyone seems to be, a five - millimeter adjustment in the modeled diameter of the Earth could be the difference between sea levels appearing to rise from any given year to the next and then appearing to drop.

Global sea levels are rising at about 3 millimeters a year owing to warming waters and melting ice.

Lack of knowledge about the ice sheets and their behavior is the primary reason that projections of global sea level rise includes such a wide range of plausible future conditions.

During glaciation, water was taken from the oceans to form the ice at high latitudes, thus global sea level drops by about 120 meters, exposing the continental shelves and forming land - bridges between land - masses for animals to migrate.

One recent modeling study focused on this mode of instability estimated that the Antarctic ice sheet has a 1 - in - 20 chance of contributing about 30 centimeters (1.0 feet) to global average sea - level rise over the course of this century and 72 centimeters (2.4 feet) by the end of the next century.

But public awareness of the urgency of the climate challenge remains low even as journalists report more deeply about how global warming will alter our cities and environment and how we'll have to adapt to those changes as wildfires rage, ice sheets melt and seas rise.

Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).

But the ice above sea level equals the water in the Gulf of Mexico and is about enough to raise global sea levels more than 20 feet.

On July 23, I wrote about the rocky rollout, prior to peer review, of «Ice Melt, Sea Level Rise and Superstorms: Evidence from Paleoclimate Data, Climate Modeling, and Modern Observations that 2 °C Global Warming is Highly Dangerous.»

In addition, it also uses knowledge about the physics of sea level rise: it determines the components of the global sea - level rise (e.g. the contribution from ice melt in Greenland and Antarctica) taking into account the knowledge about the spatial pattern, the so - called «fingerprint» associated with each of these components.

Subject of some specific concern about global warming because of large temperature rises predicted for the arctic, and because of some arctic - specific feedback effects (e.g. the albedo feedback following loss of arctic sea ice).

Vicky Pope, a meteorologist in England's climate and meteorology office, has a remarkable op - ed in the Guardian warning that scientists, the media and campaigners of all stripes who use short - term trends in weather or sea ice to make points are misleading the public about global warming.

Global average temperature is lower during glacial periods for two primary reasons: 1) there was only about 190 ppm CO2 in the atmosphere, and other major greenhouse gases (CH4 and N2O) were also lower 2) the earth surface was more reflective, due to the presence of lots of ice and snow on land, and lots more sea ice than today (that is, the albedo was higher).

What is distinct about global warming is that the basics of 100 - year - old theory have stood the test of time (more CO2 = warming world = less ice + higher seas and lots of climate change).

These emissions have raised global temperatures by about 0.8 degrees Celsius (1.4 degrees Fahrenheit) since the Industrial Revolutions leading to melting glaciers, sea level rise, vanishing Arctic sea ice, species migrations, and increases in extreme weather such as droughts and floods.

Climate alarm depends on several gloomy assumptions — about how fast emissions will increase, how fast atmospheric concentrations will rise, how much global temperatures will rise, how warming will affect ice sheet dynamics and sea - level rise, how warming will affect weather patterns, how the latter will affect agriculture and other economic activities, and how all climate change impacts will affect public health and welfare.

Global sea level rose by about 120 m during the several millennia that followed the end of the last ice age (approximately 21,000 years ago), and stabilised between 3,000 and 2,000 years ago.

While finishing up her dissertation at the National Center for Atmospheric Research (NCAR), Parkinson and climate scientist William Kellogg decided to take the theory about carbon dioxide emissions increasing global temperatures and apply it to a sea ice model that Parkinson had built.

Global average sea level was likely between 4 and 6 m higher during the last interglacial period, about 125,000 years ago, than during the 20th century, mainly due to the retreat of polar ice -LRB-

The Greenland ice sheet, earth's second largest after Antarctica, holds enough ice that, if it were to melt entirely, it would raise average global sea level by about seven meters.

Global average sea level was likely between 4 and 6 m higher during the last interglacial period, about 125,000 years ago, than during the 20th century, mainly due to the retreat of polar ice (Figure TS.21).

-- Susan Solomon, Nature The Long Thaw is written for anyone who wishes to know what cutting - edge science tells us about the modern issue of global warming and its effects on the pathways of atmospheric chemistry, as well as global and regional temperatures, rainfall, sea level, Arctic sea - ice coverage, melting of the continental ice sheets, cyclonic storm frequency and intensity and ocean acidification.

If it were to keep melting for millennia until Greenland ice disappeared completely, global sea level would rise by about 7m.

Tagged Christine Graham, climate change, concerns about extinction, Daily Mail, David Rose, decline, global warming, GWPF, ice - free Arctic, IPCC, melting ice cap, observations, polar bears, polar bears thriving, predictions, sea ice loss, summer sea ice minimum

The loss of the Greenland ice sheet produces about a 7 metre global sea - level rise.

Meantime, per Cryosphere, the Global Sea Ice Area fell by over 1 million km in a matter of about 5 days.

I must point out that this particular section generally holds info up to about 2010 ~ and so doesn't directly mention all the additional weight of scientific info in the last five years [i.e. all the newer «hot year» global records and even faster Ice Melt and sea - level rise].

ocean temperatures, widespread melting of snow and ice, and rising global average sea level,» are three disjoint sources of confirmation that give us reliable enough trend information to establish consilience about what we may say after 2005 on HadCRUT4.

LIg global temperature was about 1.6 + / -0.5 C higher than pre-industrial temperature and sea level peaked 6 — 9 m above the present level, which implies a 10 — 15 % ice - volume reduction relative to present.

Much importance has been ascribed to tracking the change in Arctic sea ice, but what about the global trend?

Now, since 2007, at the height of the global warming scare tactics about arctic sea ice, the antarctic sea ice extents anomaly CONTINUOUSLY exceeds 1.25 Mkm ^ 2 for 3 years straight now, and is larger than 1.5 Mkm ^ 2 so often for such long times that it is not even newsworthy on a skeptic site.

That winter was also to be the coldest in the UK since 1978/79, when climate scientists were still scaring us with stories about imminent global cooling and satellites were only just starting to measure the temperature of the lower troposphere and the beginnings of the «catastrophic» decline in Arctic sea - ice.

The biggest area of marine ice in the east is likely to be released despite the cold air temperatures, confirming the worries about the effect of melting Antarctic ice on global sea levels.

«Time periods with less than twice the modern global ice volume show almost no indications of sea level rise faster than about 2 metres per century,» said Dr Grant.

Based on proxy records from ice, terrestrial and marine archives, the LIG is characterized by an atmospheric CO2 concentration of about 290 ppm, i.e., similar to the pre-industrial (PI) value13, mean air temperatures in Northeast Siberia that were about 9 °C higher than today14, air temperatures above the Greenland NEEM ice core site of about 8 ± 4 °C above the mean of the past millennium15, North Atlantic sea - surface temperatures of about 2 °C higher than the modern (PI) temperatures12, 16, and a global sea level 5 — 9 m above the present sea level17.

The climate change had already affected the seas around Antarctica and is warming some coastal waters.So now both Antarctic Peninsula and West Antarctica Ice sheet are losing ice.For now, the East Antarctic Ice sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioIce sheet are losing ice.For now, the East Antarctic Ice sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioice.For now, the East Antarctic Ice sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioIce sheet is stable but it will influence on global climate change due to sea ice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioice.In the future there is growing concern about the possible impact of climate change.Is Antarctica gaining ice that meant it will effect to climate change and the ecosystem of the regioice that meant it will effect to climate change and the ecosystem of the regions?

Implications include (i) the expectation of additional global warming of about 0.6 °C without further change of atmospheric composition; (ii) the confirmation of the climate system's lag in responding to forcings, implying the need for anticipatory actions to avoid any specified level of climate change; and (iii) the likelihood of acceleration of ice sheet disintegration and sea level rise.

You don't need to go into the details about carbon emissions or chemical processes or quantities of global ice loss or sea level elevations or ocean acidification or the potential feedback loop of tundra methane releases, although there is plenty of available information on all of them.

The most recent report from the U.N. Intergovernmental Panel on Climate Change projected a global average sea level rise of between about one to three feet, although that report did not take the new findings on Antarctic ice melt into account.

Despite the overwhelming number of commercials, educational institutions and global organizations that have been warning humanity about the melting of sea ice in the Arctic, things aren't always as they are made to seem.

While St. Louis doesn't have to worry directly about sea levels or ice melt, stronger weather patterns including more droughts and floods are likely consequences of global warming, they said.

Given even larger underestimations in sea level rise and Arctic ice disappearance I assume you're point is that climate scientists have been overly cautious about the dangers of global warming.