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16 Research
in the Coldest Desert
Antarctica's McMurdo Dry Valleys are cold (mean annual temperature is negative
20 degrees Celsius) and dry (annual precipitation is less than 10 centimeters
per year). But life exists here nonetheless, and a multidisciplinary team of
scientists is working to understand how.
Berry Lyons
20 Investigating
an Arctic Gateway
About 20,000 years ago, sea level in the western Arctic dropped, and the Bering
Strait was a land bridge. The history of how sea level has risen and fallen
in this area is just one piece in understanding the puzzle of Earth’s climate.
Julie Brigham-Grette, Lloyd Keigwin and Neal Driscoll
24
From Magnetism
to Meteorites
Earth’s highest latitudes hold clues about the future of the magnetic field,
the fate of ice sheets and the history of the solar system.
Geotimes Staff
| NEWS
& VIEWS 5 COMMENT Polar Research: A Global Endeavor Scientists from many disciplines and countries are working at the poles to understand drivers of climate change. Karl A. Erb 6 NEWS
NOTES 13
POLITICAL SCENE 34 TECHNOLOGY 48 GEOLOGIC COLUMN
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