Sentences with phrase «ice extent measure»

The sea ice extent measure is broader, including areas of ocean where ice covers 15 % of the surface area.

These meridional patterns delivered substantial record heat to the Arctic, contributing to record low sea ice extent measures by end of month.

Kaleschke, 4.6 (± 0.9), Statistical I provide a simple statistical estimate for the September sea ice extent based on the total sea ice extent measured on July 11: 4.6 ± 0.9.

Not exact matches

Since there are many techniques to measure the MPP, we can keep using its drift to gauge the extent of ice - sheet melting — even in between the end of the ageing GRACE mission and the launch of the next generation of gravity - measuring satellites, says Chen.

Satellites first began measuring the extent of sea ice in the Arctic Ocean during the 1970s.

Since the MPP can be accurately measured using multiple independent techniques, its position and drift can be used to gauge the extent of ice sheet melting, especially in between the end of the ageing GRACE mission and the launch of the next generation of gravity - field - measuring satellites, says Chen.

CryoSat - 2 carries a radar altimeter optimized to measure the extent and thickness of polar ice.

The Arctic's sea ice maximum extent has dropped by an average of 2.8 percent per decade since 1979, the year satellites started measuring sea ice.

We've been able to accurately measure the extent of Arctic sea ice from satellites since 1979.

Scientists have used satellites to measure the extent of Arctic sea ice for the past 39 years.

The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.

While extent is a traditional measure of sea ice, volume is also important.

Just look at the plots taken from CMIP4 and CMIP5 models when they are compared with measured extents from NSIDC data then tell us where you would place your bet for a summer free of sea ice.

The motivation for this time series is to visualize the fact that the long term Arctic - wide loss of sea ice is not only happening in extent, which is well measured by satellites, but also in thickness, which isn't.

We know the the areal extent of sea ice is an important measure of the degree of cold in the Arctic Ocean / sea ice subsystem of Earth's climate but is it not true that even if areal extent was to increase the amount of ice could still be much decreased?

In case this isn't already clear, there is simply no measure — neither thickness nor areal extent — by which Greenland can be said to have lost 15 % of its ice.

Sea ice extent, Greenland Ice Sheet melt extent are additional measures that are exceeding model expectatioice extent, Greenland Ice Sheet melt extent are additional measures that are exceeding model expectatioIce Sheet melt extent are additional measures that are exceeding model expectations.

Same goes for measuring sea level, not to mention sea ice extent, glacial melt, etc..

... the confusion came most likely from a confusion in definitions of what is the permanent ice sheet, and what are glaciers, with the «glaciers» being either dropped from the Atlas entirely or colored brown (instead of white)... there is simply no measure — neither thickness nor areal extent — by which Greenland can be said to have lost 15 % of its ice.

Just look at the plots taken from CMIP4 and CMIP5 models when they are compared with measured extents from NSIDC data then tell us where you would place your bet for a summer free of sea ice.

There is a fascination (maybe obsession) with measure of ice melt extent with virtually no discussion or concern about the impact of an ice - free Arctic on precip and temp in western North America.

There are two ways to categorize the amount of ice: by measuring the extent (essentially the area of the ocean covered by ice, though in detail it's a little more complicated) or using volume, which includes the thickness of the ice.

The Barnett Ice Severity (BIS) index provides a measure of the extent of open water and the duration of the shipping season as defined by the presence of ice near Barrow, Alaska and onward to Prudhoe BIce Severity (BIS) index provides a measure of the extent of open water and the duration of the shipping season as defined by the presence of ice near Barrow, Alaska and onward to Prudhoe Bice near Barrow, Alaska and onward to Prudhoe Bay.

Scientists use the summer minimum as one measure of the extent of Arctic sea ice for that year.

This is why extent is such a useful measure: it only needs observations at the ice margin, and is robust even with sparse observations.

If you measure the latitude of the ice margin at just one point, you can make a very reasonable estimate of the total extent.

One of the confusing issues that newbies run into is the distinction between the various measures of arctic ice, including «area» vs «extent».

In 1979, when satellites first measured it, September Arctic sea ice extent was roughly equivalent to the area of Australia.

Michaels pointed to record Antarctic ice, which «is at its highest extent measured by the current microwave satellite sounding system» since 1978, according to data from the University of Illinois» Polar Ice Research Centice, which «is at its highest extent measured by the current microwave satellite sounding system» since 1978, according to data from the University of Illinois» Polar Ice Research CentIce Research Center.

Another conclusion is that when we weren't accurately measuring the Antarctic ice extent it was seen to be «decreasing» and when we started measuring the Antarctic ice extent accurately, it wasn't.

Both these measures put 2011 as the second lowest on record and this year's ice extent was 938,000 square miles below the average from the period 1979 to 2000.

Antarctic ice extent setting new records last year, and close to breaking them this year again Extreme weather as measured by ACE on a decline for decades Drought as measured by Palmer Drought Index flat for decades Sea level increases not accelerating and possibly starting to decelerate Signature tropospheric hot spot completely missing Scientists by the bushel coming up with some of the most absurd excuses as to why....

For example, let's say that evidence convinced me (in a way that I wasn't convinced previously) that all recent changes in land surface temperatures and sea surface temperatures and atmospheric temperatures and deep sea temperatures and sea ice extent and sea ice volume and sea ice density and moisture content in the air and cloud coverage and rainfall and measures of extreme weather were all directly tied to internal natural variability, and that I can now see that as the result of a statistical modeling of the trends as associated with natural phenomena.

The warm Arctic winter limited the formation of sea ice so much that this year's maximum extent, measured in March, was the smallest maximum ever recorded.

Stroeve says a couple of powerful cyclones that churned around the high Arctic last month moved sea ice around and complicated efforts to measure its extent.

Arctic sea ice extent has been measured by satellites since the 1970s.

The Barnett Ice Severity (BIS) Index provides a measure of the extent of open water and the duration of the shipping season as defined by the presence of ice near Barrow, Alaska and onward to Prudhoe BIce Severity (BIS) Index provides a measure of the extent of open water and the duration of the shipping season as defined by the presence of ice near Barrow, Alaska and onward to Prudhoe Bice near Barrow, Alaska and onward to Prudhoe Bay.

Cross-validation skill, measured by the correlation between two - month lead predictions and observations of September ice extent, is 0.82, while the RMS error of predictions is 0.72 million square km.

The degree to which this estimate is wrong is a measure of the degree to which the sea ice extent is not following a linear trend.

Only in this way is the energy balance determined empirically and the multitude of changes — cloud height and extent, water vapour, ozone, surface temperature, ice and snow, biology, aerosols — integrated in a comprehensible measure.

NSIDC scientist Julienne Stroeve travels to the Arctic Ocean to study sea ice at its lowest extent since satellites started measuring it in 1979.

I see, by that logic would you agree that Antarctica has lost ice dramatically when last summer marked the lowest ice extent ever measured in most lifetimes of those of who are involved measuring this?

Current conditions at the winter maximum (at 17 March 2018, from NSIDC Masie, extent measured at 14.7 mkm2, using software able to discern more ice than used for the figures in Table 1), shown below: Continue reading →

Meanwhile, up in the Arctic, distressing new information from the US National Snow and Ice Data Center in Boulder, Colorado, shows that Arctic sea ice extent has settled to its fourth - lowest level ever measured at the end of the most recent melt seasIce Data Center in Boulder, Colorado, shows that Arctic sea ice extent has settled to its fourth - lowest level ever measured at the end of the most recent melt seasice extent has settled to its fourth - lowest level ever measured at the end of the most recent melt season.

Over the past quarter - century, both the extent of melting and the length of the melt season on the Greenland ice sheet have been growing, as local temperatures have risen.6 Satellites measure the extent of melting by differentiating between areas of the ice mass that are fully frozen and those with surface meltwater.

I think someone is confused and unless someone can show me that measurements of fast ice area or extent are measured and published, Steve Mosher has a point.

Cross-validation skill, measured by correlation between four - month lead prediction and observation of September ice extent, is 0.77.

A new study published in Nature Geoscience details how analysts were able to estimate the extent of Greenland's sub-surface ice despite the fact that conventional radar pinging and satellite readings are incapable of measuring to great depths along the icy coast.

The orange line marks the median extent of the ice from 1979 to 2000 as measured on September 9 of each of those years.

When, last year, we asked the NSIDC's Walt Meier why the center chose to present data showing only one of the two measures of Arctic ice cover that they collect (respectively known as «extent» and «area»), when the presentation of both would perhaps reflect more realistically the complexity involved in taking such measurements (let alone using them to make predictions,), he told us: