Sentences with phrase «piomas sea ice thickness»

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.

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.

«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.

New way of measuring sea ice thickness could help assess how sea ice is affected by climate change

Note, that the ocean heat content includes loss of sea ice area, but not loss of sea ice thickness.

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.

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.

Almost all state - of - the - art AOGCMs now include more elaborate sea ice dynamics and some now include several sea ice thickness categories and relatively advanced thermodynamics.

Regarding my # 74: On sea ice thickness, here is an unreviewed but sensible discussion / analysis of Arctic sea ice volume and thickness as modeled by PIOMAS.

«The skill of the model is examined by comparing its output to sea ice thickness data gathered during the last two decades.

Johnson, M., et al. (2012), Evaluation of Arctic sea ice thickness simulated by Arctic Ocean Model Intercomparison Project models, J. Geophys.

Lindsay, R. W. (2010), New Unified Sea Ice Thickness Climate Data Record, Eos Trans.

Assimilation helps constrain the ice extent to observations and helps improve the simulation of sea ice thickness.

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

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.

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.

Using comprehensive data sets of observations made between 1979 and 2001 of sea ice thickness, draft, extent, and speeds, we find that it is possible to tune model parameters to give satisfactory agreement with observed data, thereby highlighting the skill of modern sea ice models, though the parameter values chosen differ according to the model forcing used.

Miller, P. A., S. W. Laxon, and D. L. Feltham (2007), Consistent and contrasting decadal Arctic sea ice thickness predictions from a highly optimized sea ice model, J. Geophys.

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

You'll find some links to sea ice thickness data on my blog's most recent «Miscellanea» post.

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, 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.

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

Zhang, 5.1 (+ / - 0.6), Modeling The seasonal prediction focuses not only on the total Arctic sea ice extent, but also on sea ice thickness field and ice edge location.

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.

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).

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.

Variability of Arctic sea ice thickness and volume from CryoSat - 2.

Corrigendum to «Using records from submarine, aircraft and satellites to evaluate climate model simulations of Arctic sea ice thickness» published in The Cryosphere, 8, 1839 - 1854, 2014.

Currently, the NASA IceBridge mission supplies both sea ice thickness and snow depth measurements in spring, providing timely information on the state of the ice cover as the melt season begins.

Advance methods to produce freeboard and sea ice thickness profiles from radar altimeter (RA) data.

On the text on the extent of Arctic sea ice, the UK asked about changes in Arctic sea ice thickness and the US about summer sea ice extent, to which the CLAs replied that this information is discussed in detail in the underlying assessment.

The scientists have measured average sea ice thickness to less than a meter in the area, and observed a late start of the freeze up period.

Over the sea ice field the observations include: sea ice freeboard height and hence sea ice thickness from radar altimetry; sea ice surface temperature and sea ice drift from respectively infrared radiometer and imaging spectrometer under cloud free conditions.

In addition, Sentinel - 3B will as well measure sea ice thickness and significant wave heights, the latter will be assimilated into MET Norway's wave forecast model, also a contribution to the Copernicus Marine Services.

Ensemble prediction of September 2010 sea ice thickness.

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.

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

Further: We calculate Arctic sea ice thickness and volume values from the standard, publically available CryoSat data as well as from near real time (NRT) CryoSat data provided directly to us from the European Space Agency.

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

Ship reports of sea ice thickness will help evaluate the vulnerability of the first - year and second - year ice to solar and ocean heating.

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

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.

Since it is the area that is measured this does not account the variation of sea ice thickness, which is needed to understand the total melt.

While sea ice thickness observations are sparse, here we utilize the ocean and sea ice model, PIOMAS (Zhang and Rothrock, 2003), to visualize mean sea ice thickness from 1979 to 2018.

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