Sentences with phrase «ice decline during»

The research has shown that manmade global warming is likely responsible for 50 to 60 percent of Arctic sea ice decline during the satellite era.

«At the end of the analysis, when looking at trend analysis results, we were stunned to observe such a dramatic ice decline during a period of only 20 years», Surdu said.

Why did sea ice decline during the worst period of the LIA?

Not exact matches

However, at least half the decline in Alpine ice during the past 150 years is «certainly due to human - induced climate change,» he says.

Data from the new ice core array illustrates that Antarctic lead concentrations reached a peak in 1900 and remained high until the late 1920s, with brief declines during the Great Depression and the end of World War II.

This means that the average reflectivity of remaining sea ice has also declined during the study period.

The rate of decline in albedo in the sea ice zone during August was approximately 3 % per decade.

When the analysis was confined to the area covered by ice, an equivalent decline in albedo was found during June - August.

Arctic warming has caused a rapid decline in sea ice cover during the past decade that could seriously affect everything from Arctic ecosystems to shipping and oil drilling.

Notably, both the decline in sea level and the decline in temperature occurred during the so - called European «Medieval Warm Period,» providing additional evidence that the «Medieval Warm Period» and «Little Ice Age» were not globally synchronous phenomena.

One study, published in Proceedings of the National Academy of Sciences in January, hinted at such a mechanism when it linked sea ice decline to apparent changes in the Arctic Oscillation during several winters preceded by large sea ice losses.

Acidity decline in Antarctic ice cores during the Little Ice Age linked to changes in atmospheric nitrate and sea salt concentratioice cores during the Little Ice Age linked to changes in atmospheric nitrate and sea salt concentratioIce Age linked to changes in atmospheric nitrate and sea salt concentrations.

Overall, sea ice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis repoice extent declined at a slightly slower rate than normal (relative to the 1981 - 2010 average rate) during June (Figure 6), losing a total of 1.6 million km2 as noted in NSIDC's Arctic Sea Ice News and Analysis repoIce News and Analysis report.

ClimateDialogue.org will kick off with a discussion on the causes of the rapid decline of the Arctic sea ice as well as the question when the Arctic sea could be ice - free during the summer months.

The study also provides an explanation for seemingly incongruous climate trends, such as how sea ice can continue to decline during this period of stalled warming, and when the sea ice decline might reverse.

The empirical evidence from the past two decades reveals that declining sea ice cover and thickness have been great enough to enhance Arctic warming during most of the year.

In a new study, Box and a team of researchers describe the decline in ice sheet reflectivity and the reasons behind it, noting that if current trends continue, the area of ice that melts during the summer season is likely to expand to cover all of Greenland for the first time in the observational record, rather than just the lower elevations at the edges of the continent, as is the case today.

Freshly fallen snow reflects up to 84 percent of incoming sunlight, but during the warm season the reflectivity declines as the ice grains within the snowpack change shape and size.

It is arguably one of the most advanced of the seven in its impacts, with a 2011 GRL report putting its warming effect as equivalent to around 30 % of atmospheric anthro - CO2, and the recent report putting albedo loss from arctic sea - ice decline since»79 as providing a forcing equivalent on average to that from 25 % of the anthro - CO2 levels during the period.

There is no explicit physical reasoning — the implicit assumption is that whatever factors drove the sea ice extent to decline approximately linearly during 10 Septembers between 1997 — 2006, will continue to operate in September 2008.

Ice divergence has spread the ice out, slowing the decline in sea ice extent during the first two weeks of JuIce divergence has spread the ice out, slowing the decline in sea ice extent during the first two weeks of Juice out, slowing the decline in sea ice extent during the first two weeks of Juice extent during the first two weeks of July.

Chukchi Sea and Southern Davis Strait bears, for example, are doing very well — contrary to all predictions — despite marked declines in summer sea ice because they have ample food during their critical spring feeding period when sea ice is abundant.»

The MDB average rainfall during the last three decades has been recording a 10 % loss per decade, I believe this is primarily due to declining solar radiation levels, moving from the highest for 8000 years to presently the lowest for 100 years, this solar decline is expected to continue for at least another 3 decades, maybe 6 decades like it did in the 16th century, brining on the last little ice age.

Sea ice declined at a near normal pace during July and then slowed somewhat during early August.

It is likely that there has been about a 40 percent decline in Arctic sea - ice thickness during late summer to early autumn in recent decades and a considerably slower decline in winter sea - ice thickness.

The most likely explanation for the linear trend [in sea ice decline] during the satellite era from 1979 onwards is the almost linear increase in CO2 concentration during that period.

Anomalous cyclonic atmospheric circulation throughout the Arctic Basin during June has continued to precondition sea ice, making the ice cover vulnerable to a precipitous drop in sea ice extent; however the persistence of the June cyclonic circulation (and cloudiness associated with the surface lows) has induced divergence within the sea ice cover, and has delayed the onset of the rapid sea ice extent decline typically observed in June.

The global decline in glacial and ice - sheet volume is predicted to be one of the largest contributors to global sea level rise during this century (Ch.

Arctic sea ice in the Bering Sea and to the north of Greenland actually declined during February, a time when sea ice usually expands toward its seasonal maximum in early to mid-March.

Even during the winter months, ice on the lakes of Alaska has begun to decline.

The Antarctic Ice Core temperature (above) only shows a 2.0 C decline during the Younger Dryas but Greenland's (above) are 15.0 C. Greenland did experience more of a decline than Antarctica in this event but nowhere near these numbers.

Over the past three and a half decades, sea ice has declined significantly, particularly during summer.

First, the peak of the Carboniferous - Permian ice age occurs 50 Ma after the peak of the galactic cosmic ray flux during a long period of declining cosmic ray flux.

One study, published in Proceedings of the National Academy of Sciences in January, hinted at such a mechanism when it linked sea ice decline to apparent changes in the Arctic Oscillation during several winters preceded by large sea ice losses.

A series of extremely low September sea ice conditions during the last decade, including the unprecedented declines in 2007 and 2012, suggests a recent acceleration in the long - term Arctic sea ice loss (e.g., Stroeve et al., 2012b).

Other parts of the world suffered severe flooding, extreme heatwaves and droughts in 2008, while Arctic sea ice was once more observed to decline markedly, reaching during September its second - lowest historic extent.

During the first half of July 2009, Arctic sea ice extent declined more quickly than in 2008, but not as fast as in 2007 (National Snow and Ice Data Center: http://nsidc.org/arcticseaicenewsice extent declined more quickly than in 2008, but not as fast as in 2007 (National Snow and Ice Data Center: http://nsidc.org/arcticseaicenewsIce Data Center: http://nsidc.org/arcticseaicenews/).

The models heavily relied upon by the Intergovernmental Panel on Climate Change (IPCC) had not projected this multidecadal stasis in «global warming»; nor (until trained ex post facto) the fall in TS from 1940 - 1975; nor 50 years» cooling in Antarctica (Doran et al., 2002) and the Arctic (Soon, 2005); nor the absence of ocean warming since 2003 (Lyman et al., 2006; Gouretski & Koltermann, 2007); nor the onset, duration, or intensity of the Madden - Julian intraseasonal oscillation, the Quasi-Biennial Oscillation in the tropical stratosphere, El Nino / La Nina oscillations, the Atlantic Multidecadal Oscillation, or the Pacific Decadal Oscillation that has recently transited from its warming to its cooling phase (oceanic oscillations which, on their own, may account for all of the observed warmings and coolings over the past half - century: Tsoniset al., 2007); nor the magnitude nor duration of multi-century events such as the Mediaeval Warm Period or the Little Ice Age; nor the cessation since 2000 of the previously - observed growth in atmospheric methane concentration (IPCC, 2007); nor the active 2004 hurricane season; nor the inactive subsequent seasons; nor the UK flooding of 2007 (the Met Office had forecast a summer of prolonged droughts only six weeks previously); nor the solar Grand Maximum of the past 70 years, during which the Sun was more active, for longer, than at almost any similar period in the past 11,400 years (Hathaway, 2004; Solankiet al., 2005); nor the consequent surface «global warming» on Mars, Jupiter, Neptune's largest moon, and even distant Pluto; nor the eerily - continuing 2006 solar minimum; nor the consequent, precipitate decline of ~ 0.8 °C in TS from January 2007 to May 2008 that has canceled out almost all of the observed warming of the 20th century.

As your references point out, during summer, sea - ice melts and ponds form, thus the sea - ice albedo declines sharply.

Ice concentrations have declined significantly along the northern Northwest Passage route during July and early August and clearing along the western end of the route is trending a week earlier than in 2007.

The period of strongly positive Arctic Oscillation during 1989 - 1995 and the loss of multi-year ice set the stage for the large decline in sea ice extent in the past decade.