April 10, 2009
As Polar Year Ends, Researchers Look for Climate Clues in Mountains
A period of intensive study of the Earth's polar caps, called
the International Polar Year, ended in March, leaving researchers
with a bounty of data to sort through to help inform the next
generation of polar research.
January 22, 2009
New Study Shows Warming Trend in Antarctica
Antarctica, a part of the world that researchers had previously
believed was bucking the trend of global warming, is getting warmer
after all, according to a newly released study.
November 25, 2008
Polar Bears Struggle to Survive as Arctic Climate Changes
As climate change threatens polar bears' survival, laws put in
place to protect the bears are impacting the Inuit people who
have long hunted them. ITN's ITV news reports on the plight of
both polar bears and Native people in the Canadian Arctic.
September 4, 2008
Study: Arctic Sea Ice at Second-lowest Level on Record
The Arctic ice cap has melted to a point that exceeds the 2005
level -- previously the second lowest on record -- and could surpass
the record this year, scientists at the U.S. National Snow and
Ice Data Center have said.
August 20, 2008
Countries Map Arctic Boundaries to Build Cases for Resource Rights
As a scramble builds to establish rights over the valuable natural
resources hidden under the Arctic sea floor, U.S. researchers
embarked from Barrow, Alaska, in mid-August on a three-week mission
to map regions of the vast underwater landscape.
May 14, 2008
Polar Bears Listed as 'Threatened' Due to Loss of Arctic Ice
In a highly anticipated decision, the Interior Department on Wednesday
declared the polar bear "threatened" under the Endangered Species
Act because of shrinking Arctic ice due to global warming. Two
analysts consider the impact of the decision.
April 1, 2008
Scientists Plot Pollutants' Path at the Arctic
The Arctic is a receptacle of the planet's air pollutants -- from
forest fires to human-produced carbon dioxide emissions -- and
a coordinated international effort is geared toward learning more
about pollutants' effects at the top of the globe.
Show: Learn more about some of the Arctic field studies
March 26, 2008
Ice Shelf Disintegrating Off Antarctica Peninsula
A huge slab of ice has fallen off the western Antarctic peninsula,
threatening the ice shelf behind it. Scientists say the collapse
shows how quickly polar changes can occur amid certain climate
conditions. A climatologist explains.
February 6, 2008
SLIDE SHOW SERIES
Interactive Map, Other Tools Bring Poles to Light
A high-resolution interactive map of Antarctica, icebreakers,
buoys and underwater robots help researchers learn about the mysteries
of the Earth's poles and relay that information to the public.
December 19, 2007
Recommendation Nears for Listing Polar Bear as 'Threatened'
One year ago, the U.S. Fish and Wildlife Service took up a proposal
to list the polar bear as "threatened" under the Endangered Species
Act -- a decision that enjoys public support but also stands to
impact a range of players, including greenhouse gas-emitting industries
and Inuit tribes.
Agency Delays Listing Decision (1.9.08)
September 10, 2007
Companies Race for Gas in Arctic
Norway's state-owned oil company, Statoil, recently opened Europe's
first large-scale liquefied natural gas plant in Hammerfest, Norway.
As global warming melts Arctic ice and makes reserves more accessible,
companies are racing to the Arctic to stake their claims.
August 1, 2007
Greenland Residents Detect Sea Changes
Residents of Greenland's west coast say they are feeling the effects
of rising sea temperatures in the fishing and tourism industries.
NewsHour correspondent Spencer Michels reports on the research
into whether the changes are climate change-related.
Interactive Web site about the poles, supported by NASA and the
National Science Foundation
June 22, 2007
Polar Research on Earth Assists with Mars Study
As scientists continue to explore the poles as part of the International
Polar Year, hoping to better understand the Earth's most extreme
environments, some researchers are looking for answers even farther
off -- toward the north pole of Mars.
May 17, 2007
New Antarctic Marine Species Surprise Scientists
An international team of researchers has found more than 700 new
species in the depths of Antarctica's Weddell Sea, surprising
scientists who had thought the region was largely devoid of life.
April 24, 2007
Inversion: Reading the Sky for Signs of Climate Change
From the thinning Arctic sea ice to the softening permafrost and
the northern migration of indigenous animals, scientists and Arctic
dwellers are taking note of the gradual impacts of climate change.
February 23, 2007
Agreements Hallmark of Antarctica
It's the least hospitable place on Earth with its extreme cold
and wind, and sovereign claims have been disputed for decades,
yet Antarctica has become a model for international cooperation.
February 23, 2007
at Poles Drive Global Warming
Over the past several decades, temperatures in the Arctic have
increased at twice the rate of average global temperatures. Meanwhile,
sea and land ice in the Arctic and parts of Antarctica have been
shrinking at a surprising and ever-growing rate, and permafrost
is thawing across the Arctic.
February 23, 2007
Year Explores How Earth Systems Interact
Chinese scientists are drilling into the Gamburtsev mountain range,
considered the birthplace of the Antarctic ice sheet. U.S. researchers
are sampling streams and soil in Antarctica's dry valleys. And
NASA is training its satellites on both poles to measure how the
polar surface interacts with the atmosphere. These projects and
more are going on during an intensified, worldwide effort to better
understand how the poles interact with the rest of the Earth.
December 27, 2006
States Weighs Declaring Polar Bears 'Threatened' Species
With polar bear numbers declining and their habitats melting,
the Bush Administration has proposed labeling them a "threatened"
species under the Endangered Species Act. The secretary of the
Interior and an environmental lawyer discuss the proposal.
November 8, 2004
Ice Pack Reveals Warming Trend
Results of a four-year study released this week by a team of 300
scientists show the Arctic is warming at twice the global average
rate. Tom Bearden reports on the science of the Arctic.