Sentences with phrase «ice thickness estimates»

Kaleschke and Rickert — provided ice thickness estimates for the area based on CryoSat - 2 and SMOS; March 2013 ice thickness in the area was greater than in 2012

The new ice thickness estimates will also be used to improve on - going seasonal predictions of sea ice extent.

They combined this data with ice thickness estimates to discover Greenland's net ice loss.

Not exact matches

Initial interpretations of data from Cassini flybys of Enceladus estimated that the thickness of its ice shell ranged from 30 to 40 km at the south pole to 60 km at the equator.

The researchers combined data gathered from the buoys between 2002 and 2015 with satellite estimates of ice thickness in this region to better understand changes affecting the Arctic Ocean in recent years.

By measuring the thickness of the ice laid down each year, the researchers estimated annual snow accumulation for the past 300 years.

«At Kima'Kho, we were able to map a passage zone in pyroclastic deposits left by the earliest explosive phase of eruption, allowing for more accurate forensic recovery of paleo - lake levels through time and better estimates of paleo - ice thicknesses,» says UBC volcanologist James K Russell, lead author on the paper published this week in Nature Communications.

Combining the speed and thickness measurements allowed the scientists to determine how much ice was flowing into the ocean, while the climate model allowed them to estimate how much snow was falling on the ice sheet.

I've had trouble finding estimates of loss of ice thickness, but it is clear that arctic sea ice has thinned considerably.

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 radiometer.

Evaluation does not only mean showing that PIOMAS says something useful but also establishes the error bars on the estimated ice thickness.

[Response: The thickness of the greenland ice sheet is ~ 2000 m on average (don't quote me, that's a ballpark estimate).

We present our best estimate of the thickness and volume of the Arctic Ocean ice cover from 10 Ice, Cloud, and land Elevation Satellite (ICESat) campaigns that span a 5 - year period between 2003 and 20ice cover from 10 Ice, Cloud, and land Elevation Satellite (ICESat) campaigns that span a 5 - year period between 2003 and 20Ice, Cloud, and land Elevation Satellite (ICESat) campaigns that span a 5 - year period between 2003 and 2008.

As I understand, it attempts to estimate ice area, thickness and volume.

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 observation.

The ice bridge was still present on 10 June (Figure 6) and based on winter air temperature Gudmansen estimates the thickness of first - year ice in the area at ~ 1.5 m.

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).

We interpret the split of 2013 Outlooks above and below the 4.1 median 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 with estimates above 4.1 who support a return to the longer - term downward trend line (1979 - 2007).

Laxon, S. W., and coauthors (2013), CryoSat - 2 estimates of arctic sea ice thickness and volume, Geophys.

A loss of 4.2 meters of ice thickness on glaciers with an estimated mean thickness of 30 - 50 meters (Post et al., 1971) is significant.

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.

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

The DM model has been validated using independent estimates of ice type from QuikSCAT (e.g., Nghiem et al. 2007) and in situ observations of ice thickness from submarines, electromagnetic sensors, etc. (e.g., Haas et al. 2008; Rigor 2005).

These were modified from the CFS v2.0 initial conditions by thinning the ice pack by 60 cm — the thickness which we used as a cutoff in making our 2010 SIO estimates.

Regarding the veracity of assorted methods of estimating sea ice thickness, it would seem that you are unaware of this paper?

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

The ice - ocean model is initialized with satellite estimates of ice concentration and model simulated ice thickness and ocean fields and is forced by the atmospheric fields from 2003 to 2009.

The latest reports from the Chukchi Sea (see contribution by J. Hutchings summarizing ship observations) estimate the thickness of level first - year ice at between 1 and 1.2 meters (i.e., relatively thick).

«Ice thickness is then calculated using a combination of the freeboard measurements and estimates of snow depth and density derived from a climatology [Warren et al., 1999]»

Add in the fact that the thickness of the ice, which is much harder to measure, is estimated to have fallen by half since 1979, when satellite records began, and there is probably less ice floating on the Arctic Ocean now than at any time since a particularly warm period 8,000 years ago, soon after the last ice age.

Helicopter - born electromagnetic estimates of the mean ice thickness were between 0.6 m and 0.7 m in the pack ice and ~ 0.4 m near the ice edge.

• How can improved estimates of sea ice thickness help improve seasonal predictions of sea ice conditions?

• Expand our existing Unified Sea Ice Thickness Climate Data Record (Sea Ice CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice thickneIce Thickness Climate Data Record (Sea Ice CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice tThickness Climate Data Record (Sea Ice CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice thickneIce CDR) to include ICESat, IceBridge, and CryoSat - 2 estimates of the ice thickneice thicknessthickness.

Considerable effort should be made to estimate thickness distributions of ice and snow cover needed to initialize simulations.

Here, thickness data, which are sorely lacking but available in a few locations as the result of International Polar Year efforts and from satellite - derived estimates of ice age or type, constrain modeled thickness distributions.

Starting with the April Pan-Arctic Ice Ocean Modeling and Assimilation System (PIOMAS) volume distribution and the April National Snow and Ice Data Center (NSIDC) average ice extent the estimated extent loss for each 10 cm thickness of ice loss is calculatIce Ocean Modeling and Assimilation System (PIOMAS) volume distribution and the April National Snow and Ice Data Center (NSIDC) average ice extent the estimated extent loss for each 10 cm thickness of ice loss is calculatIce Data Center (NSIDC) average ice extent the estimated extent loss for each 10 cm thickness of ice loss is calculatice extent the estimated extent loss for each 10 cm thickness of ice loss is calculatice loss is calculated.

To make use of that potential we would need good estimates of sea ice thickness, such as might be obtained from ICESat or CryoSat (i.e., complete spatial coverage).

Our method uses estimates of ice thickness from a coupled ice - ocean model as predictors for a statistical forecast of the minimum ice extent in September.

Kaleschke and Rickert provided an estimate of the difference between March 2013 and March 2012 ice thickness based on preliminary data from the European Space Agency's satellites CryoSat - 2 and SMOS (Figure 6).

They used different measuring equipment; one was a sideways scanning system that determined the bottom of the ice from which they estimated thickness.

Rennie (Public), 3.20 (2.50 - 3.80), Heuristic Starting with the April PIOMAS volume distribution and the April NSIDC average ice extent the estimated extent loss for each 10 cm thickness of ice loss is calculated.

We appreciate the addition of recent ice thickness data estimated from the European Space Agency CryoSat - 2 satellite, the NASA IceBridge airborne campaign, and Office of Naval Research (ONR) Marginal Ice Zone Program buoice thickness data estimated from the European Space Agency CryoSat - 2 satellite, the NASA IceBridge airborne campaign, and Office of Naval Research (ONR) Marginal Ice Zone Program buoIce Zone Program buoys.

Laxon, W.S, K. A. Giles, A. L. Ridout, D. J. Wingham, R. W., R.Cullen, R. Kwok, A. Schweiger, J. Zhang, C. Haas, S. Hendricks, R. Krishfield, N.Kurtz, S Farrell, M Davidson, CryoSat - 2 estimates of Arctic sea ice thickness and volume, Geophys.

Altimetric freeboard measurements are converted into estimates of total ice thickness assuming isostatic balance.

Figure 3: Average ice thickness from 21st March — 17th April 2017, as estimated by the radar sensor aboard CryoSat - 2.

The ice water path retrievals are smaller in magnitude than the radar estimates, and this difference grows with increasing cirrus thickness.

For the Arctic, there are several techniques available for estimating the thickness distribution of sea ice.

While ice thickness is difficult to measure using satellites, a variety of data sources and estimates indicate that the Arctic ice cover remains thin.

However, Radic notes that less than 1 percent of glaciers in the world have measured ice thicknesses, so it's hard to validate the study's estimates.

Joughin, I. & Vaughan, D. G.,» Marine ice beneath the Filchner - Ronne Ice Shelf: A comparison of estimated thickness distributions», Annals of Glaciology, in press, 20ice beneath the Filchner - Ronne Ice Shelf: A comparison of estimated thickness distributions», Annals of Glaciology, in press, 20Ice Shelf: A comparison of estimated thickness distributions», Annals of Glaciology, in press, 2005.