Living in Peace and Wisdom on our Planet

  My Profile  Log In   Register Free Now   
Living in Peace and Wisdom on our Planet Planet Thoughts Advanced       Click to see one of our videos, chosen at random from the database, along with its PlanetThought
 Try a video
Home   About   Books&Media   Resources   Contact  
   News   Quote   Review   Story   Tip   All   Blogs   News   Quotes   Reviews   Stories   Tips
Get Email or Web Quotes
or use our RSS feeds:
New Feed:  Fossil Fuel
 Full  Blog  News
Read & Comment:
A Solar Community In Isr...
'Let's You And Him Fight...
Paul Krugman's Errors An...
Why Climate Change Is An...

Most recent comments:
From Farm To Fork
A Simple List: Things We...
Can the affluent rest at...

Bookmark the site
Contribute $
Easy link from your site
Visit Second Life
Visit SU Blog

News item: Melting on the Greenland Ice Cap, 2008

    Email a Friend     See Related

0 comments   Add a comment   Contributor:  TheTeam (Feb-26-2009)    Play a Video
Optimism: 2 Categories: Global Warming, Wildlife and Nature

Melting on the Greenland Ice Cap, 2008The northern fringes of Greenland's ice sheet experienced extreme melting in 2008, according to NASA scientist Marco Tedesco and his colleagues. This image shows the number of days when melting occurred on the ice sheet compared to the average number of melt days between 1979 and 2007. Red outlines the northern rim and parts of the west coast of Greenland, indicating that the summer melting period in 2008 was longer than average in many places.

Many locations in northern Greenland experienced a record number of melt days. Temperatures at nearby ground-based weather stations were correspondingly high. The average temperature between June and August 2008 was as much as 3 degrees Celsius above average, with new record temperatures at many ground-based weather stations.

Tedesco routinely monitors melting on Greenland using satellite-based microwave measurements. Snow and water emit microwave energy, but each has a distinctive signature. If you were able to see microwave energy, it would seem that the snow suddenly shifted color as it began to melt. By using satellites to record the microwave energy coming from the ice sheet, scientists can track water in snow. This image was made with data from the Special Sensor Microwave Imager (SSM/I) on board the F13 satellite of the U.S. Defense Meteorological Satellite Program (DMSP).

Microwave emissions could be used to do more than record melt days. Satellite measurements of microwave energy could also be used to monitor snow accumulation and temperature change in remote snowy regions. "The data have shown great potential for monitoring snow accumulation rates in certain areas of the [Greenland] ice sheet, yet not in others, and so the question of 'why' remains," says Lora Koenig.

A remote-sensing glaciologist, Koenig spent November 2008 through February 2009 at the National Science Foundation's Greenland Summit Camp research station where she collected ground measurements to better understand microwave emissions of snow and ice. "My measurements will help us better understand the microwave signal [emitted by the ice and measured by satellite-based microwave instruments] and, hopefully in the future, produce more accurate maps of temperature and accumulation changes on the ice sheets." To read more about Koenig's experience on the ice, see Winter Camp: A Blog from the Greenland Summit.

  1. References

  2. Tedesco, M., Fettweis, X., Van den Broeke, M., Van de Wal, R., Smeets, P. (2008, October 7). Extreme snowmelt in northern Greenland during summer 2008. Eos, 89 (41), 391.

Map by Robert Simmon, based on DMSP SSM/I data from Marco Tedesco, City College of New York. Caption by Holli Riebeek.

Instrument: DMSP
See original news item:, Feb-25-2009  
Related reading:
  Biggest Ice Island In 48 Years Breaks Off Greenl... (Sep-11-2010)
  Canadian Devon Island Ice Cap Is Shrinking (Apr-14-2010)
  Vegetarianism And The Environment (Apr-4-2010)
  World Misled Over Himalayan Glacier Meltdown (Jan-25-2010)
  Taking 'Credit' Where Credit Is Due: from Februa... (Nov-20-2009)
  Arctic Loses Multiyear Ice (Nov-4-2009)
  Is Antarctica Cooling After All? Answer: No, It... (May-27-2009)
  NASA's Launch of Carbon-Seeking Satellite is Uns... (Feb-26-2009)
  Glaciers Around The Globe Continue To Melt At Hi... (Feb-5-2009)
  New Study Shows Climate Change Largely Irreversi... (Jan-30-2009)

Click one tag to see readings related specifically to that tag; click "Tags" to see all related readings
^ top
Add a comment    
  Follow the comments made here? 
  (Please log in or register free to follow comments)

^ top 
About contributor Member: TheTeam (PlanetThoughts Team) TheTeam (PlanetThoughts Team)

Member: TheTeam (PlanetThoughts Team) The volunteers of are happy to give you their best selection of news, opinion, reviews, stories, quotes, tips, and more. We hope you enjoy the reading... and thinking. Thanks!

Love your Planet... Know your Planet.

Visit Green Wave Email Marketing
Email Marketing for You and Your Planet

We won a Gotham Green Award for 2010, on Earth Day! Thank you Gotham Networking for this award.

See the attractive event brochure.

Recommended Sites

  Member of:
GOtham Green networking
Green Collar Economy
New York Academy of Sciences
Shades of Green Network

     Members/Affiliates *

Approaching the Limits
    to Growth
Environmental News Network
Heroin and Cornflakes

* Members of PlanetThoughts      
  communities on SU or MBL,      
  and blog article affiliates      

  Other Favorite Blogs
21st Century Citizen
Center for Bio. Diversity
Easy Ways to Go Green
Good Bags
Opposing Views

Valid my RSS feeds

We Do Follow

  Volunteer      Terms of Use      Privacy Policy  

Copyright © 2021 All Rights Reserved.
Except for blog items by David Alexander: Some Rights Reserved.