NOAA satellite image, June 30, 2004, showing wildfire smoke blanketing Alaska. (Photo courtesy of NOAA)
The Arctic is melting this summer.
But, that melting is not as severe as it
could be. Lester Graham reports a haze
filters out some of the sun’s rays:
Transcript
The Arctic is melting this summer.
But, that melting is not as severe as it
could be. Lester Graham reports a haze
filters out some of the sun’s rays:
Every year there are forest fires in Alaska, Canada and Siberia. Most of them are
started by lightning strikes. The smoke from the forest can be carried by the winds
across the Arctic. It slows the melting of the ice just a bit.
Bob Stone works with the National Oceanic and Atmospheric Administration.
“It does act as a filter. It extinguishes some of the direct sunlight that would otherwise
impinge on the surface of the snow (and) ice.”
So the smoke shades the arctic from the sun. It’s still not really good news.
Yes, melting slows a bit – but scientists think as global warming continues, we’ll see
more forest fires. That means more of the greenhouse gas CO2 is released, and, fewer
trees soaking up CO2.
For The Environment Report, this is Lester Graham.
Oil companies are legally protected from any accidental harm caused by trucks, boats and experiments that alter the polar bear’s environment (Photo courtesy of the US Fish and Wildlife Service)
Just when you thought polar bears in the United States were safe under the Endangered Species Act… they’re facing a new threat. The Bush Administration has announced regulations that allow oil companies to harass polar bears while they explore for oil off the coast of Alaska. Richie Duchon has more:
Transcript
Just when you thought polar bears in the United States were safe under the Endangered Species Act… they’re facing a new threat. The Bush Administration has announced regulations that allow oil companies to harass polar bears while they explore for oil off the coast of Alaska. Richie Duchon has more:
Oil companies can’t kill polar bears. That still brings a penalty. But they are legally protected from any accidental harm caused by trucks, boats and experiments that alter the polar bear’s environment.
The U.S. Fish and Wildlife Service’s Bruce Woods says oil exploration is not much to worry about.
“Believe me, you won’t find more concern for the polar bear anywhere than you will in this office, but we just don’t really believe that this activity at this level poses any significant threat. The threat to the polar bear is the loss of sea ice.”
Environmental groups are furious. They say the loss of sea ice from global warming is a threat to the polar bear, but they say we need to minimize other threats with a moratorium on oil exploration.
The polar bear is now listed as a threatened species (Photo courtesy of the US Fish and Wildlife Service)
The federal government has announced that
it’s listing the polar bear as a threatened species.
Biologists say the rapid loss of sea ice from
the warming climate is putting the bears at risk.
Mark Brush reports the government is now facing
legal action from some conservative groups:
Transcript
The federal government has announced that
it’s listing the polar bear as a threatened species.
Biologists say the rapid loss of sea ice from
the warming climate is putting the bears at risk.
Mark Brush reports the government is now facing
legal action from some conservative groups:
In the announcement Secretary of the Interior Dick Kempthorne tried to make it clear –
the listing doesn’t mean the government is regulating greenhouse gases. He says the
listing can’t be used to stop oil and gas drilling or to go after industries for releasing
carbon dioxide.
Reed Hopper is the principal attorney for the Pacific Legal Foundation – a conservative
public interest group. He says he still expects lawsuits from environmentalists. And that
the Secretary can’t control how the courts will interpret the new listing.
“If the activists are able to use this as they intend, to challenge industrial activity in the
United States, the ultimate effect on the average person is going to be an increase in
energy costs, transportation, fuel, food and housing.”
Hopper says his group is planning to go forward with a lawsuit of their own – opposing the listing.
Scientists are reporting vast expanses of open water in polar bear habitat due to thinning and melting ice (Photo courtesy of the US Fish and Wildlife Service)
Polar bear researchers off Alaska’s
northern coast found striking differences in
sea ice conditions recently. Lori Townsend
reports:
Transcript
Polar bear researchers off Alaska’s
northern coast found striking differences in
sea ice conditions recently. Lori Townsend
reports:
Dr. Steven Amstrup is a polar bear expert and USGS wildlife biologist.
“This is the first time in my 28 years working up here this time of year that we’ve seen anything like
this.”
Amstrup is conducting yearly research on polar bears in Alaska’s Arctic. He says getting out to pack ice usually means
flying over a narrow expanse of open water called a lead.
“But this year that lead is wide open, we have no idea really how wide it is, but its way too far for us to
fly across. So we’ve been limited to hunting in a fairly narrow band of ice that’s fairly near shore.”
Amstrup says the open water is consistent with warming conditions that result in
thinner ice. Polar bears rely on pack ice for hunting seals and other marine
mammals.
Dutchtown, MO, March 20, 2008 -- Areas remain under flood water. Much of Missouri has been affected by recent flooding. (Photo by Jocelyn Augustino, courtesy of FEMA)
Spring floods are hitting some parts of the country,
and the National Weather Service predicts high waters might hit
more states. Chuck Quirmbach reports:
Transcript
Spring floods are hitting some parts of the country,
and the National Weather Service predicts high waters might hit
more states. Chuck Quirmbach reports:
There were record snowfalls in some northern, eastern and western states during the winter. Soil
moisture in some areas is very high. With the potential for spring rainstorms, the National
Weather Service says conditions are above average for flooding. Deputy Director Vickie Nadolski
says the threat will last a while.
“As you see the temperatures start to warm up in the summer, then certainly the ground will start
to dry out a bit more, but right now it’s quite saturated.”
Nadolski urges the public to listen to warnings of flash floods and river flooding. She warns
against driving or walking into flood waters.
The National Weather Service says soil moisture is not as high in states with prolonged droughts,
and that a lot of rain or snow there will bring temporary improvement to local reservoirs.
Melting glaciers as seen from aboard the Fairweather Express II in Glacier Bay, Alaska (Photo by John Ryan)
Glacier Bay, Alaska (Photo by John Ryan)
Steller’s sea lions on a rock in Glacier Bay (Photo by John Ryan)
A National Park might not be the first place
you’d expect to turn into a crime scene. But John Ryan
found one – of sorts – on a boat touring Alaska’s Glacier
Bay National Park:
Transcript
A National Park might not be the first place
you’d expect to turn into a crime scene. But John Ryan
found one – of sorts – on a boat touring Alaska’s Glacier
Bay National Park:
(music)
Scene of the crime. Glacier Bay National Park. 9 o’clock on a sunny Saturday morning.
The crime: Global warming. You know: ice caps melting. Sea level rising. Deserts and
disease spreading. Scientists say it’s big, very big.
(music)
Intergovernmental investigators have ID’d the perpetrator: it’s us. Emissions from fossil
fuels like coal and oil have started heating the earth.
But here on the Fairweather Express II, you’d never know it. Park ranger Kevin Richards
is at the mic, entertaining passengers as we cruise past mile-wide glaciers
in the sun.
“That snow fell when Thomas Jefferson was signing the Declaration of
Independence.”
Richards tells the crowd how the glaciers have retreated 60 miles in the past 200 years.
But he hasn’t once mentioned global warming.
In the audience, Anchorage pathologist James Tiesinga smells a rat.
“The rangers seem very reluctant to say the words ‘global warming’, they skirt
the issue of why the glaciers are receding. I can’t help but wonder if the Park Service
has communicated the message to its employees, ‘don’t bring this up, it’s a hot topic’.”
And I notice the visitors’ newsletter put out by the park talks in depth about the changing
glaciers, but fails to mention that the climate is being changed by humans.
During a break in the naturalist’s stand-up routine, Tiesinga asks why there has been no
mention of global warming? Are we witnessing a coverup?
(music)
As huge chunks of ancient ice tumble into the bay, the Park Ranger, Kevin Richards, says, no,
there’s no censorship of climate science.
“Until very recently, yeah, if you’re working for the government, you
probably didn’t talk a lot about it. But now it’s okay, it’s an open forum right now.”
He says he’ll get to the connection
between melting glaciers and a warming earth near the end of his talk, but it’s a lot more
complicated than you might think.
“We just can’t talk about tidewater glaciers the same way we do about
terrestrial glaciers. It’s not the same process.”
Here’s why it’s not the same: tidewater glaciers have snouts that stick out into the ocean. Terrestrial glaciers are
land-locked. Richards goes on to say that land-locked glaciers in the mountains above
Glacier Bay are shrinking under a warming climate. But he says the dramatic loss of 60
miles of ice from Glacier Bay itself is not a sign of global warming.
(music)
To fact-check the on-board nature talk, I called up Roman Motycka.
He studies glaciers at the University of Alaska-Fairbanks’ Geophysical
Institute. He confirmed that global warming is hitting most Alaskan
glaciers hard.
“90% of the glaciers in South-Eastern Alaska are wasting away, and that’s
complicated, but primarily due to global warming.”
So why aren’t tourists in Glacier Bay hearing that when they witness fall
ice chunks fall into the ocean?
“It’s really complex there. Here’s what happened when all
that ice got lost.”
Motycka explains that tidewater glaciers have their own cycles of
advance and retreat. In a nutshell, when the snout of a glacier ends up floating in deep water, it becomes inherently prone to calving – that is, dropping icebergs – independent of the climate. And that’s what’s happened in Glacier Bay. So, in other words…
“Your naturalist was right, the terrestrial glaciers are the
ones that are more important to look at in terms of straight climate
change.”
(music)
Back on the Fairweather Express II, Park Ranger Kevin Richards
finishes his day at the mic talking about global energy consumption and
making a plea for people to protect the environment back home,
wherever they come from.
So in the end, park rangers are still the nature lovers in funny green outfits you might
remember from your childhood. And as this episode of Thaw and Glacier comes to a
close, all is well in Glacier Bay. Except for a little thing called…
Satellite imaging shows that spring thaws in the northern latitudes are happening almost a day earlier each year. Environmental scientists worry that faster melts could accelerate global warming. The Great Lakes Radio Consortium’s Corbin Sullivan explains:
Transcript
Satellite imaging shows that spring thaws in the northern latitudes are
happening almost a day earlier each year. Environmental scientists worry
that faster melts could accelerate global warming. The Great Lakes Radio
Consortium’s Corbin Sullivan explains:
The satellite readings show that the spring thaw in
the Alaskan tundra and northern forests is coming
more than a week earlier than it did in 1988.
John Kimball co-authored a study of the NASA
images. He says the greenhouse effect is responsible
for earlier melting. And he warns that faster thaws
could lead to more greenhouse gases in the
atmosphere.
“The potential here is that this warming will
actually reinforce that greenhouse related warming
trend that we’re seeing. That would occur at a much
faster rate.”
Kimball says microorganisms in the arctic soil are
the reason for the increase in heat-trapping gases.
He says the organisms become active when the soil
thaws, breaking down carbon in the soil and
releasing methane and carbon dioxide.
Kimball says an earlier thaw means more
greenhouse gases will be produced each year. That’s
in addition to the gases produced by human sources
like automobiles and power plants.
For the Great Lakes Radio Consortium, I’m Corbin
Sullivan.
NOAA satellite image, June 30, 2004, showing wildfire smoke blanketing Alaska. (Photo courtesy of NOAA)
