Showing posts with label Ice - Sea Level/Water behavior. Show all posts
Showing posts with label Ice - Sea Level/Water behavior. Show all posts

Wednesday, March 26, 2008

ICE:CNN Massive ice shelf on verge of breakup

(front page Dom Post 27 March)





http://edition.cnn.com/2008/TECH/science/03/25/antarctic.ice/index.html
http://edition.cnn.com/2008/TECH/science/03/25/antarctic.ice/index.html#cnnSTCVideo


The story

Some 220 square miles of ice has collapsed in Antarctica and an ice shelf about seven times the size of Manhattan is "hanging by a thread," the British Antarctic Survey said Tuesday, blaming global warming.

"We are in for a lot more events like this," said professor Ted Scambos, a glaciologist at the National Snow and Ice Data Center at the University of Colorado at Boulder.

Scambos alerted the British Antarctic Survey after he noticed part of the Wilkins ice shelf disintegrating on February 28, when he was looking at NASA satellite images.

Tuesday, January 22, 2008

Earth’s cryosphere


http://www.nsf.gov/news/special_reports/scivis/index.jsp?id=win2006

A Short Tour of the Cryosphere (Non-Interactive Media)

Credit: Jennifer Brennan, ADNET Systems Inc./NASA Goddard Space Flight Center; Waleed Abdalati, Horace Mitchell, Ryan Boller, Lori Perkins, Greg Shirah, Carol Boquist, NASA Goddard Space Flight Center; Walter Meier, Ronald Weaver, Mary Jo Brodzik, Richard Armstrong, National Snow and Ice Data Center; Alex Kekesi, Cindy Starr, Tom Bridgman, Randall Jones, Marte Newcombe, Stuart Snodgrass, Eric Sokolowsky, Jarret Cohen, Brian Krupp, Global Science and Technology, Inc.; Kevin Mahoney, Computer Science Corporation; Michael Starobin, Mike Velle, Honeywell Technology Solutions, Inc.

The chain of interactions between Earth’s cryosphere and its climate is endless, and this 5-minute animation gives a bird’s-eye view of it all – from the crumbling Larsen B Ice Shelf in Antarctica to the shrinking sea ice in the Arctic to the season ebb and flow of the snow cover in the Rockies.

Ice thickness and sea level change

Nasa Conferences and Workshops

ANTARCTIC SEA ICE THICKNESS FROM PASSIVE MICROWAVE RETRIEVALS OF SNOW DEPTH
TIME: Tues., Dec. 11, 5:40 p.m. EST (2:40 p.m. PST), MW 3006
SESSION: C23B-05
Antarctic sea ice thickness estimates from satellite altimeters are dependent on accurate estimates of snow depth. Satellite data provide a good indicator of snow depth over broad scales in most cases and for all areas except for the East Antarctic sector. NASA’s Thorsten Markus of Goddard Space Flight Center, Greenbelt, Md., will discuss how satellite snow depth can provide reasonable estimates of regionally-averaged ice thicknesses.

http://www.nasa.gov/topics/earth/agu2007_tips.html

SATELLITE AND IN SITU OBSERVATIONS OF REGIONAL SEA LEVEL CHANGE: WHAT CAN THEY TELL US ABOUT FUTURE CHANGES?
TIME: Thurs., Dec. 13, 7 p.m. EST (4 p.m. PST), MW 3003
SESSION: G44A-01
Satellite altimetry has provided precise sea level measurements since the early 1990s. Melting of mountain glaciers and the polar ice sheets are expected to create distinct patterns of regional sea level change. While these have yet to be detected in satellite altimeter data, satellite gravity missions such as NASA's Gravity Recovery and Climate Experiment (GRACE) provide a means of monitoring ice melt contributions directly. With these and other tools we can begin to put together a framework for predicting what regional sea level change will look like in the future.

Ice/Water behaviour

ice behaviour
water behaviour

http://www.colorado.edu/UCB/AcademicAffairs/ArtsSciences/physics/PhysicsInitiative/Physics2000/applets/h2ob.html

Tuesday, December 11, 2007

Scientists - contacts + Data = ICESat

Esoteric Agenda
A challenge to global warming as a untruth
http://www.youtube.com/watch?v=Dhxp-720z1Y
original source
http://www.consciousmedianetwork.com/video/121207.htm

DATA-SOURCES
http://oiswww.eumetsat.org/VLab/cgi/view.pl?format=short&section=Useful%20Links%20to%20Live%20DataVL Resource Library - Useful Links to Live Data

http://mynasadata.larc.nasa.gov/data.html
The MY NASA DATA Live Access Server (LAS) is now available to create your own microsets for your class or your interests. The LAS contains over 128 parameters in atmospheric and earth science from five NASA scientific projects.

MAJOR STARTING POINT FOR DATA


Digital rendering of ICESat ICESat
http://icesat.gsfc.nasa.gov/
ICESat (Ice, Cloud,and land Elevation Satellite) is the benchmark Earth Observing System mission for measuring ice sheet mass balance, cloud and aerosol heights, as well as land topography and vegetation characteristics. The ICESat mission will provide multi-year elevation data needed to determine ice sheet mass balance as well as cloud property information, especially for stratospheric clouds common over polar areas. It will also provide topography and vegetation data around the globe, in addition to the polar-specific coverage over the Greenland and Antarctic ice sheets.

http://icesat.gsfc.nasa.gov/list.php

About the Branch: About Home
http://neptune.gsfc.nasa.gov/csb/subpages/?section=About%20the%20Branch

Cryospheric research within the Branch addresses the physics of ice sheets and glaciers, sea ice, snow on ice and land, and their roles in the global climate system. Laboratory technology efforts develop new approaches to remote sensing measurements of critical physical processes. Previous Laboratory research, which led to the TOPEX/Poseidon mission, has now led also to Goddard leadership of the ICESat/GLAS altimeter—including present Laboratory support of GLAS data processing—plus ice sheet altimetry, the Mars Orbiting Laser Altimeter (MOLA), and our strong airborne ice topography validation program. We expect these activities to continue.

Despite problems with the instrument, ICESat has produced stunning results that extend well beyond the planned polar ice sheet program goals to include sea ice measurements and new applications to Earth topology and even land water run-off and forest height measurements. For the Laboratory, Goddard and NASA, this is an on-going development of highest priority with broad, across-the-board application for Earth science needs and we expect Laboratory staff to assist with a long-lifetime, advanced-laser ICESat follow-on mission proposal.

Jay Zwally - Senior Research Scientisthttp://neptune.gsfc.nasa.gov/csb/personnel/index.php?page=profile&pers_id=10

Phone: 301-614-5643
Fax: 301-614-5644

Email: E-mail Jay Zwally

Address:
Cryospheric Sciences Branch
Code 614.1
NASA Goddard Space Flight Center
Greenbelt, Maryland USA 20771

His recent research includes leading a comprehensive analysis of the mass balance of the Greenland and Antarctic ice sheets and ice shelves, the discovery of the melt-acceleration effect on the flow of the Greenland ice sheet, and the first comprehensive mapping of sea ice freeboard and thickness distributions.

Since 1979, he has been a leading scientist promoting satellite laser altimetry for ice sheet mass balance studies, leading to the launch of the Ice Cloud and Land Elevation Satellite (ICESat) in 2003. Currently, he is the ICESat Project Scientist and a member of the science teams for the Geoscience Laser Altimeter System (GLAS), the Mars Orbiting Laser Altimeter (MOLA), and ENVISAT and CRYOSAT Calibration/Validation.

DATA

ICESat elevationa dn cloud Illustration.

ICESat data are distributed by the National Snow and Ice Data Center (NSIDC). GLAS produces 16 data products including Levels 1A, 1B, and 2 laser altimetry and atmospheric lidar data. Visit this website...

http://nsidc.org/daac/icesat/
The Geoscience Laser Altimeter System (GLAS) is the sole instrument on the Ice, Cloud, and land Elevation Satellite (ICESat). The main objective of the ICESat mission is to measure ice sheet elevations and changes in elevation through time. Secondary objectives include measurement of cloud and aerosol height profiles, land elevation and vegetation cover, and sea ice thickness. ICESat will enable scientists to study the Earth's climate and, ultimately, predict how ice sheets and sea level will respond to future climate change.

ICESat has a near-circular and near-polar 91-day orbit with a 33-day repeat cycle, at an altitude of approximately 600 km, providing global coverage between 86°N and 86°S.

The National Snow and Ice Data Center (NSIDC) archives and distributes 15 products, including Levels 1A, 1B, and 2 laser altimetry and atmospheric lidar data. The initial data stream is approximately 20 GB per day.

http://nsidc.org/data/icesat/index.html


IMAGERY

ICESat elevationa dn cloud Illustration.

This figure illustrates ice sheet elevation and cloud data from ICESat's GLAS on its first day of operation February 20, 2003. For more information on this image, and to view more images, click on the picture or follow this link...

See Also

Related Data Sets


http://neptune.gsfc.nasa.gov/
Hydrospheric and Biospheric Sciences Laboratory
614.1 Cryospheric Sciences Branch 614.1 Cryospheric Sciences Branch
614.2 Ocean Sciences Branch 614.2 Ocean Sciences Branch
614.3 Hydrological Sciences Branch 614.3 Hydrological Sciences Branch
614.4 Biospheric Sciences Branch 614.4 Biospheric Sciences Branch
614.5 Terrestrial Information Systems Branch 614.5 Terrestrial Information Systems Branch
614.6 Instrumentation Sciences Branch 614.6 Instrumentation Sciences Branch


Articles newscientist.com

http://environment.newscientist.com/search.ns?doSearch=true&query=ice+melt

Search Results - ice

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Ice

Esoteric Agenda
A challenge to global warming as a untruth
http://www.youtube.com/watch?v=Dhxp-720z1Y
original source
http://www.consciousmedianetwork.com/video/121207.htm

http://www.youtube.com/watch?v=h5-F30YFEv8
ice melt

ice: cnn.com

WEB RESULTS
1-5 of 540,000
Abrupt Climate Change : Woods Hole Oceanographic Institution
Is Global Sea Level Rising? From the National Snow and Ice Data Center. Oceans &
Climate: The Ocean’s Role in Climate & Climate Change (pdf version) ...
http://www.whoi.edu/page.do?pid=12455

Are We on the Brink of a 'New Little Ice Age?' : Woods Hole ...
The issue centers around the paradox that global warming could instigate a new
Little Ice Age in the northern hemisphere. Evidence for abrupt climate change ...
http://www.whoi.edu/page.do?pid=12455&tid=282&cid=10046

Special Report on Climate Change - New Scientist Environment
Thanks to global warming, the risk of severe thunderstorms could double by 2100,
.... Climate change has emptied the North-West Passage of ice, ...
http://environment.newscientist.com/channel/earth/climate-change/

Global Climate Change: Research Explorer - Cryosphere
Global Glacier Volume Change (1960–1998) - National Snow and Ice Data Center ...
an overview of the status of snow and ice as indicators of climate change. ...
http://www.exploratorium.edu/climate/cryosphere/index.html

Greg Stone | Global Climate Change: The Ross Ice Shelf | WGBH ...
Global Climate Change: The Ross Ice Shelf Greg Stone, Global Marine Programs,
New England Aquarium The Southern Ocean, the body of water surrounding ...
http://forum.wgbh.org/wgbh/forum.php?lecture_id=1112