Sentences with phrase «sea ice thickness in»

Figure 1: (a) Ensemble prediction of September 2011 sea ice thickness in the Northwest Passage region and (b) ensemble standard deviation (SD) of ice thickness, which shows the uncertainty of the prediction.

The average sea ice thickness in 2012 was just 1.25 meters, down from 3.59 meters in 1975, studies show.

Combined data sets of draft and thickness from submarine sonars, satellite altimetry and airborne electromagnetic sensing provide broadly consistent and strong evidence of decrease in Arctic sea ice thickness in recent years.

Collow, T.W., W. Wang, A. Kumar, and J. Zhang, Improving Arctic sea ice prediction using PIOMAS initial sea ice thickness in a coupled ocean - atmosphere model, Mon..

Birthing success of female ringed seals (Phoca hispida) is also affected by regional sea ice thickness in early spring.

Our results stress the importance of considering loss of sea ice thickness in future climate change assessments.

(left) Ensemble prediction of September 2013 sea ice thickness in the Northwest Passage region from the PIOMAS model.

It is therefore important to consider both loss of sea ice concentration and sea ice thickness in evaluating the response of the atmosphere.

(a) Ensemble prediction of September 2012 sea ice thickness in the Northwest Passage region and (b) ensemble standard deviation (SD)[Zhang and Lindsay].

(a) Ensemble prediction of September 2011 sea ice thickness in the Northwest Passage region and (b) ensemble standard deviation (SD).

This year's sea ice thickness in spring can be estimated to be the thinnest among the recent 6 years.

Why do you think the average sea ice thickness in the Arctic never got far above 3m in the twentieth century?

Not exact matches

«This shift is characterized by the persistent decline in the thickness and summer extent of sea - ice cover and by a warmer, l

In the hot spots of the Amundsen and Bellinghausen seas, the ice shelves lost 18 % of their thickness in less than 20 yearIn the hot spots of the Amundsen and Bellinghausen seas, the ice shelves lost 18 % of their thickness in less than 20 yearin less than 20 years.

the south - bound expedition had cleared that vast plain of floating ice which flows down from the great mountains of the interior and covers the southern part of Ross Sea throughout an area above 20,000 square miles with an ice sheet approximately 800 feet in thickness, and had begun to climb the heights which form the mountainous embayment at the head of Ross Sea.

After compiling 10 floe - scale maps of the ice from the Weddell, Bellingshausen, and the Wilkes Land regions of the continent, the researchers found that the sea ice thickness tended to be highly variable, with many ridges and valleys, they report online today in Nature Geoscience.

Although CryoSat - 2 is designed to measure changes in the ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and sea floor geometry and the Archimedes principle of buoyancy — which relates the thickness of floating ice to the height of its surface.

In addition to the thickness of the snow cover on top of the sea ice, the buoys also measure the air temperature and air pressure.

AWI researchers observed a considerable decrease in the thickness of the sea ice as early as the late summer of 2015, even though the overall ice covered area of the September minimum ultimately exceeded the record low of 2012 by approximately one million square kilometres.

Examining the CyroSat - 2 sea ice thickness map for this spring, Stefan Hendricks further explained: «The Transpolar Drift Stream, a well - known current in the Arctic Ocean, will be carrying the majority of the thick, perennial ice currently located off the northern coasts of Greenland and Canada through the Fram Strait to the North Atlantic.

If we compare the ice thickness map of the previous winter with that of 2012, we can see that the current ice conditions are similar to those of the spring of 2012 — in some places, the ice is even thinner,» Dr Marcel Nicolaus, sea ice physicist at AWI, said today at a press conference during the EGU General Assembly in Vienna.

«It may even be possible to predict sea ice cover a year in advance with high - quality observations of sea ice thickness and snow cover over the whole Arctic,» said Cecilia Bitz, co-author and professor of atmospheric sciences at the University of Washington.

Prior to this research, there was little information about the thickness of sea ice in the NWP, which meanders through the Canadian Arctic Archipelago.

Both the area of water covered by sea ice and the thickness of the ice have been decreasing in recent years, and thinner ice is blown farther and faster by the wind.

In the area surveyed, which lies to the north of the Fram Strait between Greenland and Svalbard, the sea - ice thickness was ca. 1.7 metres, roughly 50 centimetres more than was recorded in 201In the area surveyed, which lies to the north of the Fram Strait between Greenland and Svalbard, the sea - ice thickness was ca. 1.7 metres, roughly 50 centimetres more than was recorded in 201in 2016.

From an altitude of just over 700 km, CryoSat will precisely monitor changes in the thickness of sea ice and variations in the thickness of the ice sheets on land.

First, we expect the ice thickness distribution in April 30 from redistribution (divergence / convergence) of sea ice during December and April, based on the daily ice velocity data.

ICESat - 2 will add to our understanding of Arctic sea ice by measuring sea ice thickness from space, providing scientists more complete information about the volume of sea ice in the Arctic and Southern oceans.

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.

Zhang, J., D. R. Thomas, D. A. Rothrock, R. W. Lindsay, Y. Yu, and R. Kwok (2003), Assimilation of ice motion observations and comparisons with submarine ice thickness data, J.Geophys.Res., 108 (C6), 3170, DOI: 3110.1029 / 2001JC001041 Zhang, J., and D. A. Rothrock (2003), Modeling global sea ice with a thickness and enthalpy distribution model in generalized curvilinear coordinates, Monthly Weather Review, 131 (5), 845 - 861.

This is because the «early camp» are missing a major factor, even though most of them don't know it: That factor is that first year sea ice will continue to grow to thicknesses of around 1.5 to 2m through the winter, so the key issue in whether September can be virtually sea - ice free is how much sea ice can be lost between March and September.

The sea ice component represents sea ice in multiple categories of thickness and accounts for changes in thickness due to growth and melt as well as mechanical deformation of ice (Thorndike et al. 1975, Hibler 1980).

Ice volume, the product of sea ice area and thickness, is a measure for the total loss in sea ice and the total amount of energy involved in melting the iIce volume, the product of sea ice area and thickness, is a measure for the total loss in sea ice and the total amount of energy involved in melting the iice area and thickness, is a measure for the total loss in sea ice and the total amount of energy involved in melting the iice and the total amount of energy involved in melting the iceice.

It is argued that uncertainty, differences and errors in sea ice model forcing sets complicate the use of models to determine the exact causes of the recently reported decline in Arctic sea ice thickness, but help in the determination of robust features if the models are tuned appropriately against observations.

We find a consistent decreasing trend in Arctic Ocean sea ice thickness since 1979, and a steady decline in the Eastern Arctic Ocean over the full 40 - year period of comparison that accelerated after 1980, but the predictions of Western Arctic Ocean sea ice thickness between 1962 and 1980 differ substantially.

Volume, in contrast, is crucial in determining the vulnerability of Arctic sea ice to rapid future reductions (since thin ice is much more prone to react strongly to a single warm summer, making single very - low sea - ice summers more likely), and the thickness of the ice determines the exchange of heat between ocean and atmosphere.

Analysis of the new record shows that since a peak in 1980, sea ice thickness has declined 53 percent.

«Cryosat found the volume (area multiplied by thickness) of sea ice in the central Arctic in March 2011 to have been 14,500 cubic kilometres.

Sea ice thickness is also being measured since 2004 and there has been a dramatic decrease in thickness according to NASA's press release, NASA Satellite Reveals Dramatic Arctic Ice Thinning dated July, 20ice thickness is also being measured since 2004 and there has been a dramatic decrease in thickness according to NASA's press release, NASA Satellite Reveals Dramatic Arctic Ice Thinning dated July, 20Ice Thinning dated July, 2009.

In the Antarctic, there is very sparse data on sea ice thickness — not enough to judge one way or another, leaving only climate modeling results to work with.

The team, which Marc led and provided the logistical support for, deployed from Resolute to Nord Greenland before setting up a rustic field camp on the sea ice for six days, during which time we mechanically drilled the ice to measure thickness, measuring snow depth in a grid pattern along the flight lines as well as dragging instruments along the surface that produced the same measurements for comparison to the airborne data.

The researchers also found no predictive value in seeking insights from trends in conditions like sea - ice thickness.

... A new sea - ice albedo parameterization scheme has been developed and implemented in ECHAM5 general circulation model, and includes important components like albedo decay due to snow aging, ice thickness dependency and an explicit treatment of melt pond albedo.

And variations in the thickness and extent of sea ice cloaking the Arctic Ocean are driven by yet another set of complicating factors, ranging from long - term shifts in atmospheric pressure patterns to events as close - focus as the potent Arctic superstorm I reported on earlier this month.

Sea ice less than one year old was somewhat thicker than has been observed in recent years, with a modal thickness around 1.8 m, after one of the coldest North American winters in recent years.

Canadian Ice Service, 4.7, Multiple Methods As with CIS contributions in June 2009, 2010, and 2011, the 2012 forecast was derived using a combination of three methods: 1) a qualitative heuristic method based on observed end - of - winter arctic ice thicknesses and extents, as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictoIce Service, 4.7, Multiple Methods As with CIS contributions in June 2009, 2010, and 2011, the 2012 forecast was derived using a combination of three methods: 1) a qualitative heuristic method based on observed end - of - winter arctic ice thicknesses and extents, as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictoice thicknesses and extents, as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictoSea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictoIce Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictosea ice predictoice predictors.

In our 2010 SIO estimate, it was found that the CFSv2 sea ice extent seemed too excessive (due to too thick ice in the initial condition), and the extent confined within 60 cm of ice thickness matches the real time observatioIn our 2010 SIO estimate, it was found that the CFSv2 sea ice extent seemed too excessive (due to too thick ice in the initial condition), and the extent confined within 60 cm of ice thickness matches the real time observatioin the initial condition), and the extent confined within 60 cm of ice thickness matches the real time observation.

Relatively large expanses of older, multiyear ice were observed in the Beaufort Sea with a modal thickness around 3.6 m, which was also somewhat thicker than has been observed in this region recently.

A sea ice thickness product by Nathan Kurtz, Michael Studinger, and Sinead Farrell is shown in Figure 6.

We interpret the split of 2013 Outlooks above and below the 4.1 level to different interpretations of the guiding physics: those who considered that observed sea ice extent in 2012 being well below the 4.1 level indicates a shift in arctic conditions, especially with regard to reduced sea ice thickness and increased sea ice mobility; and those who have estimates above 4.1 who support a return to the longer - term downward trend line (1979 - 2007).