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Larsen B Ice Shelf Breakup |
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Over a 35-day period from January 31 to March 7, 2002, Antarctica's Larsen B ice shelf lost a total of about 1,255 square miles (3,250 square kilometers), one of the largest shelf retreats ever recorded. This image, captured by NASA's MODIS satellite sensor on February 23, shows the shelf mid-disintegration, spewing a cloud of icebergs adrift in the Weddell Sea. In December 2007, a team of National Geographic explorers will begin a five-week expedition across the continent's Larsen ice shelf to study how global warming is changing the topography of Antarctica.
Photograph courtesy NASA
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INSTRUCTIONS FOR DOWNLOADING WALLPAPER
For Windows 95 or Higher
- Determine which size is appropriate for your monitor.
- Click the size you wish to download. (See the top of this page.)
- After the image appears in your browser, click the right-hand button on your mouse.
- On the menu that pops up, select SET AS WALLPAPER or SET AS BACKGROUND.
For Mac OS X
- Determine which image size is appropriate for your monitor.
- Click the size you wish to download. (See the top of this page.)
- After it appears in your browser, drag the image onto your desktop.
- From the Apple menu select SYSTEM PREFERENCES.
- Select DESKTOP.
- In the pull-down menu marked "Collection," select CHOOSE FOLDER.
- Locate desired image file and double-click it.
INSTRUCTIONS FOR DELETING WALLPAPER
For Windows Users (Internet Explorer)
- From your desktop, click the "My Computer" icon.
- Once the window opens, click the following folders, in this order: Local Disk (usually C: drive)
• Documents and Settings
• Your Username
• Application Data
• Microsoft
• Internet Explorer
- In the "Internet Explorer" folder, you will find a file called "Internet Explorer Wallpaper.bmp."
- To delete this file, click the file name with your mouse, then right-click and scroll down the menu to the "delete" option. Or simply hit the "delete" key on your keyboard.
- The wallpaper image will remain until the computer is restarted. To delete from view without restarting the computer, right-click anywhere on an open area of the desktop, scroll down and select "Properties." (This will open the "Display Properties" window.) Click on the "Desktop" tab, select a different background and click "OK." This will change your desktop background immediately.
For Mac OS X
- Locate the "Applications" folder in the Macintosh hard drive and choose "System Preferences."
- Select "Desktop & Screen Saver." This will show you what wallpaper is currently displayed on your desktop.
- To change the current photo, select a new photo from the drop-down menu.
- To remove the photo permanently from the desktop, locate the photo on the hard drive and drag it to the trash. This will delete the image.
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