Sentences with phrase «for sea ice thickness»

• What are the systematic differences between different measurement systems for sea ice thickness?

Not exact matches

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.

Together with his AWI colleague Dr Stefan Hendricks, they evaluated the sea ice thickness measurements taken over the past five winters by the CyroSat - 2 satellite for their sea ice projection.

Finnish Meteorological Institute has been doing estimates of two essential sea ice parameters — namely, sea ice concentration (SIC) and sea ice thickness (SIT)-- for the Bohai Sea using a combination of a thermodynamic sea ice model and Earth observation (EO) data from synthetic aperture radar (SAR) and microwave radiometsea ice parameters — namely, sea ice concentration (SIC) and sea ice thickness (SIT)-- for the Bohai Sea using a combination of a thermodynamic sea ice model and Earth observation (EO) data from synthetic aperture radar (SAR) and microwave radiometsea ice concentration (SIC) and sea ice thickness (SIT)-- for the Bohai Sea using a combination of a thermodynamic sea ice model and Earth observation (EO) data from synthetic aperture radar (SAR) and microwave radiometsea ice thickness (SIT)-- for the Bohai Sea using a combination of a thermodynamic sea ice model and Earth observation (EO) data from synthetic aperture radar (SAR) and microwave radiometSea using a combination of a thermodynamic sea ice model and Earth observation (EO) data from synthetic aperture radar (SAR) and microwave radiometsea ice model and Earth observation (EO) data from synthetic aperture radar (SAR) and microwave radiometer.

However, sea ice then grows very rapidly, since the growth rate for thin ice is much higher than for thick ice, which acts as a negative feedback on thickness during the growth season (Bitz and Roe, 2004; Notz, 2009).

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.

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.

Decadal hindcast simulations of Arctic Ocean sea ice thickness made by a modern dynamic - thermodynamic sea ice model and forced independently by both the ERA - 40 and NCEP / NCAR reanalysis data sets are compared for the first time.

% due to eruption 9.5 % (assuming the average thickness of melted ice was 1 meter, and not allowing for any of the heat being lost to warming the 4 km thick sea water column, or air, or evaporation)

Professor Peter Wadhams, member of AMEG, expert on Arctic sea ice and a reviewer for the IPCC AR5 report, says that the PIOMAS data is based on actual thickness measurements.

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.

Obtaining circumpolar observations of Antarctic sea ice thickness is critical for both monitoring and predicting climate.»

Based on February / March SMOS sea ice thickness and September SSMI sea ice concentration we provide a heuristic / statistical guesstimate for the 2015 September sea ice extent: 3.6 + / - 0.7.

If this thinning would have eliminated ice from areas observed to have sea ice, a minimum thickness of 20 cm was left in place for the ice initial condition.

The complete absence of multiyear sea ice in the region, confirmed by thickness surveys and local observations, is a first for the region in the past several decades.

Radar ice - thickness estimates of the Arctic Sea ice showed that it had been thinning for years, just as they had also shown that the northern coastal glaciers of Greenland were thinning.

Stéphanie Jenouvrier, a biologist at the Woods Hole Oceanographic Institution in the US, and colleagues from France and the Netherlands report in Nature Climate Change that changes in the extent and thickness of sea ice will create serious problems for a flightless, streamlined, survival machine that can live and even breed at minus 40 °C, trek across 120 kilometres of ice, and dive to depths of more than 500 metres.

Improvements in seasonal forecasting practice arising from recent research include accurate initialization of snow and frozen soil, accounting for observational uncertainty in forecast verification, and sea - ice thickness initialization using statistical predictors available in real time.

Satellite - derived estimates of sea - ice age and thickness are combined to produce a proxy ice thickness record for 1982 to the present.

Ground - based observations in the Bering Sea indicate below - normal ice thickness this spring (see the Sea Ice for Walrus Outlooice thickness this spring (see the Sea Ice for Walrus OutlooIce for Walrus Outlook).

A new ensemble prediction from an ice - ocean model was submitted by Zhang for the July outlook and the new sea ice thickness map for September 2010 still shows ice remaining in Lancaster Sound.

Given the annual cycle of melting and refreezing for the majority of sea ice, thickness is not relevent as it would dissapear and re-appear annually.

Reasoning for a decrease in sea ice extent from recent years, perhaps approaching new record - low minimum, focuses on the below - normal sea ice thickness overall, the thinning of sea ice in coastal seas, rotting of old multi-year sea ice, warm temperatures in April and May 2010, and the rapid loss of sea ice area seen during May.

Reasoning for a new record minimum focuses on the below - normal ice thickness overall, the thinning of sea ice in coastal seas, rotting of old multi-year sea ice, and the rapid loss of sea ice area seen during May.

• Create a Bias - corrected Observed Ice Thickness Record consisting of all of the observations in the Sea Ice CDR adjusted by subtracting a constant bias for each system which is found relative to a standard observation system (submarines).

You are certainly right about the thickness of the Antarctic snow, and the point goes double for the ice sheet — that's why fluctuations in the AIS can cause tens of meters of sea level rise.

On page 16 here: https://curryja.files.wordpress.com/2014/10/sea-ice-physical-processes.pdf There is the «Annual cycle of net surface heat flux for various ice thicknesses» Roughly interpolating the no sea ice flux I got an average of — 310 Wm2 over the course of a year.

``... examination of records of fast ice thickness and ice extent from four Arctic marginal seas (Kara, Laptev, East Siberian, and Chukchi) indicates that long - term trends are small and generally statistically insignificant, while trends for shorter records are not indicative of the long - term tendencies due to strong low - frequency variability in these time series, which places a strong limitation on our ability to resolve long - term trends....

The ensemble consists of seven members each of which uses a unique set of NCEP / NCAR atmospheric forcing fields from recent years, representing recent climate, such that ensemble member 1 uses 2005 NCEP / NCAR forcing, member 2 uses 2006 forcing..., and member 7 uses 2011 forcing... In addition, the recently available IceBridge and helicopter - based electromagnetic (HEM) ice thickness quicklook data are assimilated into the initial 12 - category sea ice thickness distribution fields in order to improve the initial conditions for the predictions.

The Canadian Ice Service notes: The reduced overall sea ice thicknesses and the greater proportion of seasonal (first - year) ice were the primary reasons for this year's record - breaking minimIce Service notes: The reduced overall sea ice thicknesses and the greater proportion of seasonal (first - year) ice were the primary reasons for this year's record - breaking minimice thicknesses and the greater proportion of seasonal (first - year) ice were the primary reasons for this year's record - breaking minimice were the primary reasons for this year's record - breaking minimum.

Kaleschke and Tian - Kunze, 3.6 (± 0.7), Heuristic / Statistical (same as June) Based on February / March SMOS sea ice thickness and September SSMI sea ice concentration we provide a heuristic / statistical guesstimate for the 2015 September sea ice extent: 3.6 (± 0.7) million km2.

The Outlook also underscored important lessons for improvements in future efforts, including: a need for additional work on remote sensing of spring and summer sea ice conditions; sea ice thickness data; and more formal forecasting and evaluation methods.

As noted last month, this range depends in part on the relative weight that the respondents give to «initial conditions,» e.g., age and thickness of sea ice at the end of spring, versus whether summer winds in 2008 will be as supportive for ice loss as the favorable winds were in 2007.

The mean ice concentration anomaly for June 2013 is 0.9 x 106 square kilometers greater than June 2012, however Arctic sea ice thicknesses and volumes continue to remain the lowest on record.

As a result of limited satellite observations of sea ice thickness (for more information: Sea Ice Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice thicknesea ice thickness (for more information: Sea Ice Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice thickneice thickness (for more information: Sea Ice Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice tthickness (for more information: Sea Ice Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice thickneSea Ice Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice thickneIce Thickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice tThickness Data Sets: Overview and Comparison), few climate modeling experiments have isolated the role of changing sea ice thicknesea ice thickneice thicknessthickness.

Arctic Sea Ice Thickness (NRL), for April 18, 2014.

Maslowski's recent, peer - reviewed work (Maslowski W., Clement Kinney J., Higgins M., Roberts A. (2012) «The Future of Arctic Sea Ice», The Annual Review of Earth and Planetary Sciences, 40: 625 - 654) emphasizes «the need for detailed analyses of changes in sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raquSea Ice», The Annual Review of Earth and Planetary Sciences, 40: 625 - 654) emphasizes «the need for detailed analyses of changes in sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raquIce», The Annual Review of Earth and Planetary Sciences, 40: 625 - 654) emphasizes «the need for detailed analyses of changes in sea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raqusea ice thickness and volume to determine the actual rate of melt of Arctic sea ice&raquice thickness and volume to determine the actual rate of melt of Arctic sea ice&raqusea ice&raquice».

So, prompted by reports of the heaviest sea ice conditions on the East Coast «in decades» and news that ice on the Great Lakes is, for mid-April, the worst it's been since records began, I took a close look at ice thickness charts for the Arctic.

However, as you'll see by the sea ice thickness maps below, there may be good reason for the lack of ringed seal lairs, and a general lack of seals except at the nearshore lead that forms because of tidal action: the ice just a bit further offshore ice looks too thick for a good crop of ringed seals in all three years of the study.

Poitou & Bréon do not explain why the ice pack volume would be relevant for the albedo; according to Haas (2005)[47] the changes of the thickness of the sea ice are small since they are correctly measured by an airborne radio apparatus, only over the Arctic.

NH sea ice, both extent and thickness, is increasing for three years now.

=============================================================== Brandon quotes me, «NH sea ice, both extent and thickness, is increasing for three years now.

In response to your question I would refer you to my comment above Dave Wendt (14:39:39): where I discuss the Rigor and Wallace paper of 2004 which demonstrated that the decline in sea ice age and thickness began with a shift in state in Beaufort Gyre and the TransPolar Drift in 1989 which resulted in multiyear ice declining from over 80 % of the Arctic to 30 % in about one year and that the persistence of that pattern has been responsible for the continuing decline.

CryoSat was launched in 2010 to measure sea - ice thickness in the Arctic, but data from the Earth - observing satellite have also been exploited for other studies.

As such, monitoring Arctic ice thickness may be useful for predicting rapid changes in sea ice.

Based on the understanding of both the physical processes that control key climate feedbacks (see Section 8.6.3), and also the origin of inter-model differences in the simulation of feedbacks (see Section 8.6.2), the following climate characteristics appear to be particularly important: (i) for the water vapour and lapse rate feedbacks, the response of upper - tropospheric RH and lapse rate to interannual or decadal changes in climate; (ii) for cloud feedbacks, the response of boundary - layer clouds and anvil clouds to a change in surface or atmospheric conditions and the change in cloud radiative properties associated with a change in extratropical synoptic weather systems; (iii) for snow albedo feedbacks, the relationship between surface air temperature and snow melt over northern land areas during spring and (iv) for sea ice feedbacks, the simulation of sea ice thickness.

The Arctic coastal regions of the Chukchi and Beaufort Seas generally are covered with shore - fast ice for about eight months, but over the past two decades, sea ice extent and thickness have diminished.

Examination of records of fast ice thickness (1936 — 2000) and ice extent (1900 — 2000) in the Kara, Laptev, East Siberian, and Chukchi Seas provide evidence that long - term ice thickness and extent trends are small and generally not statistically significant, while trends for shorter records are not indicative of the long - term tendencies due to large - amplitude low - frequency variability.

Caption for the image above: ICESat, CryoSat and PIOMAS sea ice thickness measurements in the Arctic.