Navigation Links
New method to estimate sea ice thickness
Date:3/5/2008

Scientists recently developed a new modeling approach to estimate sea ice thickness. This is the only model based entirely on historical observations.

The model was developed by scientists with the U.S. Geological Survey and the Russian Academy of Sciences, Moscow.

Using this new technique, the thickness of Arctic sea ice was estimated from 1982 to 2003. Results showed that average ice thickness and total ice volume fluctuated together during the early study period, peaking in the late 1980s and then declining until the mid-1990s. Thereafter, ice thickness slightly increased but the total volume of sea ice did not increase.

Scientists propose that the volume stayed constant during the studys latter years because while the ice was thickening in the high latitudes of the Arctic, the surrounding sea ice was melting. Sea ice, however, can only become so thick, and if Arctic sea ice continues to melt, the total volume of sea ice in the Arctic will decrease.

The most dramatic losses in sea ice cover have occurred since 2003, and as scientists acquire newer data, they will apply the new model to study recent years of ice thickness and volume change.

This modeling approach uses sea ice motion data to follow parcels of ice backward in time at monthly intervals for up to 3 years while accumulating a history of the solar radiation and air temperature to which the ice was exposed. The model was constructed by fitting these data with an ice parcels known thickness to determine how the thickness of sea ice changes in response to different environmental conditions. Data on the known thickness are obtained from measurements by submarine cruises and surface coring missions.

Sea ice is affected by the accumulation of environmental factors to which it has been exposed, said USGS Director Mark Myers. Understanding the natural variability of sea ice thickness is critical for improving global climate models. Sea ice regulates energy exchange and plays an important role in the Earths climate system.

This model, built on historical observations, complements thermodynamic models that simulate ice thickness. Science benefits from having different models. Comparing different model outputs can help improve predictive capabilities. Many scientists worldwide are using satellite and ground observations of the Arctics atmosphere, ice and ocean to gain a better understanding of how changes at the top of the world affect ecosystems both locally and globally.


'/>"/>

Contact: Jessica Robertson
jrobertson@usgs.gov
703-648-6624
United States Geological Survey
Source:Eurekalert

Related biology news :

1. Powerful yet reliable proteomics techniques are the focus of a new methods book
2. RNA-based methods for developmental studies are featured in Cold Spring Harbor Protocols
3. Stowers Proteomics Center devises method for assigning probabilities to human protein interactions
4. New method developed to identify genetic determinants of Alzheimers disease
5. Feinstein researchers develop new genetic method and identify novel genes for schizophrenia
6. New book presents methods to poke and prod individual molecules
7. Team of scientists develops non-invasive method to track nerve-cell development in live human brain
8. Cold Spring Harbor Protocols highlights a method that captures cell growth and activity
9. From brains to behavior: Cold Spring Harbor Protocols features methods for neuroscience research
10. Contraception: progress brings hope for new methods for men
11. 454 Sequencing: Science paper describes a novel, highly efficient method of sequencing ancient DNA
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:11/17/2016)... -- AIC announces that it has just released a new white paper authored by Zettar ... high speed data transfer storage solutions. Photo - http://photos.prnewswire.com/prnh/20161116/440463 ... ... ... Setting up a high performance computing or HPC system can be ...
(Date:11/14/2016)... Nov. 14, 2016  Based on its ... Frost & Sullivan recognizes FST Biometrics with ... for Visionary Innovation Leadership. FST Biometrics emerged ... identification market by pioneering In Motion Identification ... instant, seamless, and non-invasive verification. This patented ...
(Date:6/21/2016)... VANCOUVER, British Columbia , June 21, 2016 ... been appointed to the new role of principal ... has been named the director of customer development. ... , NuData,s chief technical officer. The moves reflect ... development teams in response to high customer demand ...
Breaking Biology News(10 mins):
(Date:11/30/2016)...  GenomOncology today announced the appointment of Joshua F. ... Dr. Coleman will oversee clinical content development and ... The GenomOncology software suite empowers molecular pathologists with a seamless ... decision support, from quality control through reporting. ... , , ...
(Date:11/30/2016)... /PRNewswire/ - Portage Biotech Inc. ("Portage" or "the Company") ... to announce the formation of EyGen, Ltd. a ... assets through proof of concept. EyGen,s lead asset ... Pharmaceuticals Limited and being developed for topical ophthalmic ... segment diseases. This agent has the potential to ...
(Date:11/30/2016)...  The Allen Institute for Cell Science has ... available collection of gene edited, fluorescently tagged human ... structures with unprecedented clarity. Distributed through the Coriell ... a crucial first step toward visualizing the dynamic ... human cells healthy and what goes wrong in ...
(Date:11/30/2016)...  Tempus, a technology company focused on supporting ... Cancer Center have partnered to better determine which ... treatment based on next generation genomic and transcriptomic ... research collaboration, Tempus will provide sequencing and analysis ... to Penn. Utilizing next-generation sequencing, machine learning and ...
Breaking Biology Technology: