October
20, 1008
SACBEE.COM:
Yosemite
glacier on thin ice
"As
melting water gushed off the ice in a tinseled maze of rivulets
and tumbled through a gaping chasm, the hikers watched, wondered
and worried. Unlike most backcountry travelers who pitch their
tents along the John Muir Trail in the upper reaches of the Lyell
Fork of the Tuolumne River, these visitors had not pushed on to
scale the summit of Mount Lyell – Yosemite's highest peak.
Instead, they scrambled up a ridge of rose-tinted granite and over
a mound of dark, unstable boulders to tromp across this less
well-known corner of the national park, a silvery-white sheet of
ice fast becoming one of the first California landmarks to succumb
to climate change. Later in the day, Pete Devine, a veteran
glacier observer who manages educational programs for the
nonprofit Yosemite Association, sat on a log and opened a
notebook. "Gaunt remnant of what I saw 10, 20 years
ago," he wrote in his journal. "Lots of large boulders
dot the surface. Lots of melt water flow." As signals of
climate change begin to come into focus in the Sierra Nevada, its
melting glaciers spell trouble in bold font. Not only are they
in-your-face barometers of global warming, they also reflect what
scientists are beginning to uncover: that the Sierra snowpack –
the source of 65 percent of California's water – is dwindling,
too. More of the Sierra's precipitation is falling as rain instead
of snow, studies show, and the snow that blankets the range in
winter is running off earlier in the spring. And snow in the
Sierra touches everything. Take it away and droughts deepen, ski
areas go bust and fire seasons rage longer. Some glaciers already
have melted away, including the first Sierra glacier discovered in
Yosemite by John Muir in 1871. Today, the remaining 100 or so are
withering, including Lyell, the second-largest, which could be
gone inside a century....."
October
16, 1008
MSNBC.COM:
'Dramatic
evidence' of Arctic melt, experts warn
"Autumn
temperatures in the Arctic are at record highs, the Arctic Ocean
is getting warmer and less salty as sea ice melts, and reindeer
herds appear to be declining, researchers reported Thursday.
"Obviously, the planet is interconnected, so what happens in
the Arctic does matter" to the rest of the world, Jackie
Richter-Menge of the Cold Regions Research and Engineering
Laboratory in Hanover, N.H., said in releasing the third annual
Arctic Report Card for the federal National Oceanic and
Atmospheric Administration. "There continues to be widespread
and, in some cases, dramatic evidence of an overall warming of the
Arctic system," the experts stated in their report. Compiled
by 46 scientists from 10 countries, the report looks at six areas
in the Arctic: atmosphere, sea ice, Greenland, ocean, biology and
land. It found a "warming" trend in the first three
signals and "mixed" signals in the latter three. The
region has long been expected to be among the first areas to show
impacts from global warming, which the U.N.-sponsored
Intergovernmental Panel on Climate Change says is largely a result
of human activities adding carbon dioxide and other gases to the
atmosphere...."
October
6, 2008
MSNBC.COM:
99 percent of
Alaska glaciers in decline
"Most
of Alaska's glaciers are retreating or thinning or both, a new
book by the U.S. Geological Survey reports. About 5 percent of
Alaska's area is covered by more than 100,000 glaciers — that's
about 29,000 square miles (75,000 square kilometers), or more than
the entire state of West Virginia. While a few of Alaska's large
glaciers are advancing, 99 percent are retreating, the book,
"Glaciers in Alaska," states. The book was written by
USGS research geologist Bruce Molina. A USGS project to photograph
the glaciers of Montana's Glacier National Park also showed
significant retreat. Based on these photos and glacier recession
rates, scientists predicted the park could lose its namesakes by
2030. Greenland, which is covered by more ice than anywhere else
in the world outside Antarctica, has also seen significant melt of
its glaciers in recent decades. The new book on Alaska's glaciers
used satellite images, aerial photos, maps and other studies to
document the retreat of the glaciers, which began as early as the
mid-19th century. Some glaciers have even disappeared since being
mapped in the mid-20th century, the report found...."
September
21, 2008
SEATTLE
TIMES: North
Cascades glaciers victims of climate change
"Lyman
Glacier, sitting just below 8,459-foot Chiwawa Peak, is dying.
Nearby, Spider Glacier is already gone. The scientist who
pronounced it dead three years ago thinks one-third of the
glaciers in the North Cascades — including Lyman — are doomed.
Mauri Pelto says the other two-thirds may have a chance, if the
world does something to stop climate change. Pelto is an
environmental-science professor at Nichols College in Dudley,
Mass., and has studied glaciers for more than two decades. In
August, he completed his 25th hiking trip to several North Cascade
glaciers. He's been watching and measuring the great slabs of
moving ice every year since 1984. It is the largest study of
glaciers in the North Cascades, home to one-third of all glaciers
in the Lower 48 states. He visits 10 glaciers every year for
in-depth measurements, and monitors 37 others with less-regular
trips. Five of them have already died, and all of the glaciers
he's studying are now retreating. They've lost 20 to 40 percent of
their volume. Pelto says when he first learned about climate
change as a graduate student at the University of Maine, before he
started this study, he was skeptical...."
September
19, 2008
SPIEGEL
ONLINE: Melting
Ice Brings Competition for Resources
"Bo
Madsen, a climate researcher, is plagued by a simple question: How
heavy is the world's largest island? More importantly, Madsen
wants to know how quickly its weight is changing. "This is no
academic question," the Dane yells over the whipping of the
rotor blades. "The answer will determine the fate of millions
of people." Greenland's majestic landscape glides by beneath
the helicopter. A mottled gray-and-white glacier tongue winds its
way down a series of mountain slopes. Farther up, the jagged
terrain gives way to a smooth, seemingly endless expanse of white,
capped by a glistening aura that makes it difficult to distinguish
between the sky and the surface of the ice cap. The scientists
have spent the last two hours flying over the edge of the inland
ice in their Super Puma helicopter. The gigantic ice cap is close
to three kilometers (1.86 miles) thick. If it were to melt, sea
levels worldwide would rise by seven meters (23 feet), spelling
the end for many coastal cities.... How does one measure the
recession of an ice cap? A lone mountain peak protrudes from the
glacier ice. This is where the Danish and American geophysicists
plan to set up their measuring equipment. Their project, called
GNET, will be part of a formidable scientific observation network,
an early warning system of measuring stations and satellites
designed to monitor the Greenland ice cap...."
September
17, 2008
IRIN:
Melting
glaciers threaten livelihoods
"The
number of glaciers in Kyrgyzstan has dropped by 15 percent over
the past 30 years, according to Kyrgyz environmental experts,
because of climate change. "The process of melting glaciers
is a very serious problem for Kyrgyzstan because the main water
resources are connected first of all with the glaciers," Anna
Kirilenko, with the BIOM environmental NGO, told IRIN in the
capital, Bishkek. Kirilenko believed the melting glaciers
threatened water supplies. "It turns out that today we have
much water, tomorrow we have little. There will be certain
imbalances; the behavior of rivers will be changing. All
ecosystems that are located next to mountain ranges will be
subject to certain changes," she said. According to the
International Fund to Save the Aral Sea, an inter-governmental organization
established by Central Asian states, 4,2 percent of Kyrgyzstan's
territory or about 8,400 sq km, is covered with glaciers. A study
by T Bolch from the Institute of Cartography, Technical University
of Dresden, on glacier retreat and climate change in Northern Tien
Shan on the border of Kazakhstan and Kyrgyzstan, stated that the
melting glaciers in the area corresponded closely with temperature
changes...."
September
16, 2008
LIVE
SCIENCE: Biggest
Melt Comes From Smallest Glaciers
"The
big glaciers of Greenland get most of the attention in terms of
global warming's impact on melting and rising sea levels, but it's
actually the little glaciers that count the most, a new study
finds. Satellite observations of the Greenland Ice Sheet indicate
that nearly 75 percent of the ice lost there actually comes from
the island’s small coastal glaciers. The study's authors say
that this finding means small glaciers should be better-observed
than they currently are in order to get a better handle on
potential contributions to sea level rise. The team's measurements
of melt agree more with the lower end of the range of predictions,
on the order of 100 Gigatons of ice melting, versus 200 Gigatons.
Study team member Ian Howat of Ohio State University's Byrd Polar
Research Center said the higher estimates were made with methods
that are still not completely reliable. Outside of Antarctica,
Greenland has more ice than anywhere else on Earth. Its ice cap
covers four-fifths of the island's surface and is 1,491 miles
(2,400 kilometers) long, 683 miles (1,100 km) wide, and can reach
almost 2 miles (3 km) in thickness at its thickest point...."
September
15, 2008
MIAMI
HERALD: Peru's
potato farmers adapt to climate change
"For
the first half of his life, Gregorio Huanuco farmed to a rhythm
that dictated the survival of his grandparents and ancestors for
thousands of years. He waited for the rains to fall on his small
parcel of land in this village at 11,000 feet in the Cordillera
Blanca, or White Range, of the Andes in central Peru, and planted
native varieties of potatoes as well as cereal crops like quinoa.
When the crops ripened, Huanuco, 45, harvested what he needed and
sold what he didn't in the city of Huaraz several hundred feet
below in the valley. Climatologists say global warming's impact
was first documented in the Peruvian Andes in 1970, but 1990 is
the year Huanuco says he began to notice disruptions, first in
small, bizarre, anomalous forms: a battering hailstorm, two months
without rain, a warm winter. Then the quirky weather became more
consistent and other oddities began to appear: rats nibbling away
at his cereal crops and a fungus, known as late blight, blanketing
his potatoes. ''Before, we planted all year long, any month we
wanted to,'' Huanuco said, dubiously eyeing his tiny plot,
recently sown with potato seed. ``Now we only get water a few
times a year and so we cannot plant as much, and the pests and
diseases keep coming....'' But increasingly, farmers like Huanuco,
who depend heavily on a predictable climate, are finding
themselves vulnerable and ill-prepared to handle new pests and
diseases that have materialized as temperature and rainfall
patterns have shifted. Climate change is creating new challenges
that may threaten the potato's chance to become a key export
product unless farmers learn to adapt...."
3NEWS.CO.NZ:
NZ
glaciers continue to shrink
"New
Zealand's glaciers are continuing to shrink and are showing the
lowest total ice mass on record. The National Institute of Water
and Atmospheric Research (Niwa) said the Southern Alps glaciers
had lost 2.2 billion tonnes of permanent ice from April 2007 to
March this year, the fourth-highest annual loss since monitoring
started. iwa has been surveying 50 glaciers in the Southern Alps
for the past 32 years to record the height of the snow line at the
end of summer. Niwa principal scientist Jim Salinger said that
because of the La Nina weather system over New Zealand, more
easterly winds and warmer than normal temperatures during the
period, there was less snow in the Southern Alps and more
snowmelt. Snow fed the glaciers, he said. "The higher the
snow line, the more snow is lost to feed the glacier. On average,
the snow line this year was about 130m above where it would need
to be to keep the ice mass constant," Dr Salinger said. He
said that worldwide, most glaciers were retreating...."
September
10, 2008
SCIENCE
DAILY: As
Andean Glacier Retreats, Tiny Lifeforms Swiftly Move In
"A
University of Colorado at Boulder team working at 16,400 feet in the
Peruvian Andes has discovered how barren soils uncovered by retreating
glacier ice can swiftly establish a thriving community of microbes,
setting the table for lichens, mosses and alpine plants. The discovery
is the first to reveal how microbial life becomes established and
flourishes in one of the most extreme environments on Earth and has
implications for how life may have once flourished on Mars, said
Professor Steve Schmidt of CU-Boulder's ecology and evolutionary biology
department. The study also provides new insights into how microorganisms
are adapting to global warming in cold ecosystems on Earth...."
MONTANA
KAIMIN: Montana
glaciers affect rising seas researcher says
"What
does the rise in sea level have to do with Montana? Most Montanans would
say nothing, but Professor Joel Harper, a glaciologist at the University
of Montana, knows that there is a connection. According to Harper, the
melting glaciers in the Northern Rocky Mountains - like the ones in
Glacier National Park - not only provide an enormous amount of water
during Montana’s dry season, but also affect the level of sea rise,
which is inevitable due to climate change. Harper said Montana’s
glaciers, part of 300,000 or so glaciers around the world, are
responsible for 60 percent of any sea level rise. Harper said most
people don’t understand that floating sea ice, like the ice shelves
that break off from Antarctica and Greenland, doesn’t affect sea level
rise. “That ice is already in the ocean, and the water is already
displaced,” Harper said. “It’s the ice that’s sitting on
land that changes the sea level.” Water from inland glaciers
ultimately winds up in the ocean. Melt water from the surface of
glaciers with outlets to the ocean causes ice motion —referred to as
“ice dynamics.” This lubrication increases the glacial rate of speed
to the sea, where they break off - a process called “calving” - and
adds to ocean ice, raising the sea level...."
September
9, 2008
FRESNO BEE: Melting
global ice likely to reveal yet more mummified secrets from the
past
"Two bodies found
in a Sierra Nevada glacier are the first ice mummies recovered in
the lower 48 states. But people around the world have been finding
frozen bodies for decades. These discoveries inspire both
scientific interest and morbid curiosity: Who were these mummies?
How did they die? How tall were they? What were they wearing? How
did they wind up in the ice that preserved them for ages? As the
climate warms, and glaciers melt, there probably will be more of
these creepy but fascinating stories, experts say. "I'm sure
more bodies are going to be found," said forensic
anthropologist Paul Emanovsky, who examines remains for the U.S.
military's Joint POW/MIA Accounting Command in Hawaii. Since the
early 1990s, frozen bodies have been found in Europe, South
America and Asia -- including, in 1999, that of George Mallory on
Mount Everest. Mallory is the English explorer who died climbing
Everest in the 1920s. Such ice mummies usually are created by
accident: Someone dies in a place where extreme cold prevents
bacteria and fungi from destroying the corpse -- often a glacier
or an ice sheet. The body is slowly engulfed in ice. In the
process, it dries out quickly in the thin, arid air at high
elevations. Bacteria and fungi, which cause decay, can't grow
where there is no water. And the tiny organisms do not survive at
subfreezing temperatures...."
September
8, 2008
LIVE
SCIENCE: Pyrenees
Glaciers Disappearing
"The
crisp, white glaciers of the Pyrenees, the mountain range along the
border between France and Spain, have substantially receded in the past
15 years and could disappear by 2050 due to global warming, a new study
suggests. The retreat of glaciers in Greenland and areas like Glacier
National Park have been well-documented, but less well-studied are the
situations of alpine glaciers around the world. Researchers at the
University of Cantabria, the Autonomous University of Madrid and the
University of Valladolid compiled data from current and historic studies
of the glaciers in the high mountain regions of the Iberian Peninsula to
gauge how climate change has affected these icy behemoths. "High
mountains are particularly sensitive areas to climate and environmental
changes, and how glaciers evolve there in response to climate change is
one of the most effective indicators of current global warming,"
said study leader Juan José González Trueba. González Trueba and his
colleagues found that the steady increase in temperature — a total of
1.6 degrees Fahrenheit (0.9 degrees Celsius) since 1890 — in Spain's
northern mountains indicated that the Pyrenean glaciers would disappear
before 2050...."
DISCOVER MAGAZINE:
The
Ground Zero of Climate Change
"A
profound feeling of isolation sets in as the plane departs. Propellers
roar. The twin-engine Basler, vintage 1942, bounces on skis over the
wind-pocked ice, bobs into the air, and shrinks to a dot in the sky.
Then it’s just the four of us standing here, a pile of boxes and bags,
and flat, white horizon in every direction. We’re on our own in
Antarctica for the next few weeks, in the middle of a million square
miles of empty ice about 380 miles from the South Pole. Aside from a few
invisible bacteria, we’re the only living things for hundreds of miles
in any direction. We pause to let it sink in; then we grab our tent bags
and set to work. It’s a typical summer afternoon on the West Antarctic
Ice Sheet. A wind blows from the south, scouring the ice free of loose
snow so it resembles weathered sandstone. We stand atop one of the
largest hunks of ice on earth. You might call this place ground zero in
the effort to predict climate change, sea level rise, and the fate of
coastal cities around the world. With a volume of more than 700,000
cubic miles and an average thickness of 4,000 feet, the West Antarctic
Ice Sheet (WAIS) holds enough water to raise sea levels by 15 to 20
feet—and it is already sweating off 130 billion tons of ice per year.
Satellites have helped to monitor the changes in the region, but there
are some things you simply have to come here and explore in person. Ice
sheets aren’t the static scabs of frost that scientists once imagined,
but rather complex structures with many moving parts. In the WAIS,
massive conveyor belts of ice (called ice streams) up to 100 miles
across and hundreds of miles long ooze toward the ocean, where they
splinter into icebergs. Guiding their movement is an array of unseen
forces, including mountains, valleys, and lakes—and maybe even
smoldering volcanoes—hidden beneath the ice. We cannot predict how the
ice will respond to warming without understanding those forces...."
AFP:
Melting
Swiss glacier yields Neolithic trove, climate secrets
"Some
5,000 years ago a prehistoric person trod high up in what is now the
Swiss Alps, wearing goat leather pants, leather shoes and armed with a
bow and arrows. The unremarkable journey through the Schnidejoch pass, a
lofty trail 2,756 metres (9,000 feet) above sea level, has been a boon
to scientists but it would never have emerged if climate change were not
melting the nearby glacier. So far, 300 objects dating as far back as
the Neolithic or New Stone Age -- about 4,000 BC in Europe -- to the
later Bronze and Iron Ages and the Medieval era have been found in the
site's former icefields. We know now that the discoveries on Schnidejoch
are the oldest of this kind ever made in the Alps," said Albert
Hafner, an expert with the archaeology service in Bern canton."
They have allowed researchers not only to piece together snapshots of
life way back when, but also to shed light on climate fluctuations in
the past 6,500 years -- and hopefully shed light on what is happening
now. "For us, the site itself is the most important find because we
have this correlation between climate change and archaeological
objects," Hafner said...."
September
5, 2008
SCIENTIFIC
AMERICAN: A
Deep Thaw: How Much Will Vanishing Glaciers Raise Sea Levels?
"Greenland,
the world's largest island, holds enough ice to raise global sea levels
by 23 feet (seven meters). Add the ice sheets of Antarctica and the
oceans would deepen more than 200 feet (60 meters). Satellite
measurements from space and speed measurements on land confirm that
Greenland's glaciers are melting and on the move. And although the
picture is less clear in Antarctica, the global warming seems to be
having an impact there, too. So the question is: How much—and how
soon—will sea level rise? New research from glaciologist Tad Pfeffer
of the University of Colorado at Boulder and colleagues published in Science
attempts to better estimate the possible sea level rise over the next
century by measuring the speed at which the world's glaciers—in
Greenland and Antarctica but also the many mountain ice sheets
throughout the globe—are actually speeding to the sea as well as how
swiftly they may melt. What would the flow velocities of the
ocean-ending outlet glaciers have to be," if Greenland alone was to
raise sea level by just six feet (two meters)? "The answer turned
out to be huge: about 49 kilometers [30 miles] per year, 70 times faster
than those glaciers move today," Pfeffer says, "and three
times faster than we've ever observed an outlet glacier to move."
Given that Greenland's glaciers are not presently moving anywhere close
to that pace—Kangerdlugssuaq Glacier, the fastest, reached speeds
above nine miles (14 kilometers) per year in 2005—the researchers also
looked at ice that could contribute from the rest of the world. Assuming
that the largest remaining ice shelves in East Antarctica—Filchner-Ronne
and Ross—will remain intact, sea level rise from all other melting ice
and the expansion of seawater as the weather gets warmer over the next
century would be somewhere between 2.6 feet (0.8 meter) and six feet
(two meters)—or nearly twice as much as projected last year by the
U.N. Intergovernmental Panel on Climate Change (IPCC)...."
IPP:
Of
Mt. Kilimanjaro ice waving us good-bye due to deforestation
"The
recent scientific theory linking the loss of snow on Mount Kilimanjaro
to increased deforestation on the mountain's foothills is more than sad
news as far as the welfare of the mountain's biodiversity is concerned.
The theory is highlighted in a recent study report compiled by two
researchers from Britain's Portsmouth University -Nicholas Pepin and
Martin Schaefer, who took eleven days to survey the mountain's glaciers.
The researchers, who revealed their findings at a news conference in Dar
es Salaam recently, said the mountain's glacier surface had shrunk from
20 kilometers in 1880 to two kilometers in 2000. They said the
development was caused more by local than regional factors. Pepin
believes that deforestation which is mainly due to extensive farming is
the major cause. ``Deforestation of the mountain's foothills is the most
likely culprit because without forests there is too much evaporation of
humidity into outer space. The result is that moisture-laden winds
blowing across those forests have become drier and drier,`` he
explained. This revelation is another reminder of the catastrophic
effects that deforestation can cause to the environment. Try to imagine
the fate of the whole range of biodiversity that depend on flow of water
resulting from the normal melting of the mountain's ice such as forests,
animals (both wild and domesticated) and other living
organisms...."
September
4, 2008
CHRISTIAN
SCIENCE MONITOR: Shrinking
Arctic Ocean sea ice signals climate change
"Key
portions of Earth’s cryosphere are in deep trouble. So far this
summer, Arctic Ocean sea ice has shrunk to its second-lowest extent on
record as ice shelves along Canada’s northernmost islands are
disintegrating at a rapid pace. A new report from the United Nations
Environment Program and the World Glacier Monitoring Service notes that
the melt rate for glaciers the service uses as reference sites appears
to have doubled since 2000. The resulting increase in open water is
expected to have a wide-ranging impact on global warming. “These are
huge areas that are changing,” says Luke Copland, who heads the
Laboratory for Cryospheric Research at the University of Ottawa,
referring to the ice declines in the Arctic. People can debate the
causes behind what’s happening in the Arctic, he says, “but what we
can’t debate is the fact that things are changing, and they’re
changing really fast.” Moreover, the changes are irreversible under
today’s climate regime, adds Derek Mueller, a polar scientist at Trent
University in Peterborough, Ontario. On Tuesday, Dr. Mueller and his
colleagues reported that in early August, the 19-square-mile Markham Ice
Shelf broke free of its moorings on the northern coast of Ellesmere
Island. It’s now an ice island nearly the size of Manhattan floating
freely in the Arctic Ocean. Another of Canada’s four remaining ice
shelves has lost 60 percent of its extent, while a third shelf continues
to disintegrate. The accumulated loss for the summer amounts to an area
of ice more than three times the size of Manhattan, or some 23 percent
of the area that existed heading into summer...."
SCIENTIFIC
AMERICAN: Climate
Change: Ice Chunk the Size of Manhattan Splits from Canadian Glacier
"There's
another island the size of Manhattan, but this one is a newly broken ice
sheath off the Arctic circle. The Markham Ice Shelf separated from
Canada's Ellesmere Island last month, Bloomberg News reports. The split
of the 4,500-year-old, 10-story-tall ice shelf, which borders Greenland,
dismayed scientists concerned that global warming was the culprit.
"It was a complete shock,'' Luke Copeland, director of the
Laboratory for Cryospheric Research at the University of Ottawa, told
the newswire. "What was really amazing is that we lose it all in
such a short period of time, within just a few days.'' The news comes
just a week after the National Snow and Ice Data Center reported
near-record melting of sea ice in the Arctic. The Serson Ice Shelf is 60
percent smaller now that a combined 47 square miles (122 square
kilometers) of ice have broken off, and the Ward Hunt Ice Shelf -- the
largest of the remaining four -- also is disintegrating, Reuters
notes. "
September
3, 2008
SEATTLE
POST-INTELLIGENCER: Global
warming: Western U.S. feels the heat
"As
pilot Bruce Gordon lifts up from the local airport, the distant
perspective of the Teton Range raises the spirits, but the unfolding
sight of dying forests sears the soul. High-elevation white bark pines,
which have endured droughts and lightning and insect attacks in life
spans as long as 1,000 years, are being killed by a tiny beetle whose
numbers were once limited by a bitter winter climate. "What you are
seeing is a natural process on steroids: All these trees will be toast
unless the pace of global warming is drastically slowed," said
Diana Tombeck, a University of Colorado-Denver professor. She studies
white bark pine and calls it "a foundation species." Later, in
the Wind River Range, on a tour sponsored by the Natural Resources
Defense Council, we cut open a 1,000- year-old white bark pine to see
pine beetles feeding inside the tree. In the 1920s and the 1970s -- and
for centuries before -- this pine had survived beetle attacks. This
year, the tree's defenses have been overwhelmed. "It's a zombie
tree: It's dead but doesn't know it," said Jesse Logan, a retired
U.S. Forest Service scientist. "It took everything that nature
could throw at it, but not what we have caused to happen." The
perspective from this place in the Rockies is particularly angering. The
13,770-foot Grand Teton is where presidents, at least Bush Sr. and
Clinton, have come to tout their "green" credentials. It's
America's best photo backdrop....."
September
2, 2008
CHIEF
ENGINEER: Scientists
Study Effect Of Rainier Glacier Melt
"A
slurry of rocks and mud sounded like a freight train when it ripped
through a popular Mount Rainier hiking destination in 2001 and scared
some television viewers who believed their homes were in the path. As it
turned out, the debris flow at Comet Falls proved less dangerous than
initially believed, but it gave scientists insights into a phenomenon
that continues to mystify. Such a debris flow likely added damage to
Mount Rainier National Park when a flood sparked by nearly 18 inches of
rain in two days shut it down in November 2006. Experts are concerned
that the level of flood danger is increasing as sediment builds in
glacier-fed waters like the Nisqually River. Scientists suspect that
climate change - specifically, shrinking glaciers that leave unstable
rock behind - is adding to the risk of debris flows that help clog river
channels downstream. This summer, a team of researchers is gathering
information at Mount Rainier that could help provide answers. One of the
leading scientists is Gordon Grant, a U.S. Forest Service hydrologist
and Oregon State University professor of geosciences....."
September
1, 2008
EARTH2TECH:
Controversial
Globe-Changing Measures Could Be the Only Answer to Climate Change
"...Researchers
Brian Launder of the University of Manchester and Michael Thompson of
the University of Cambridge have published a series of papers in the
UK’s Royal Society that call for a serious look at a variety of
extreme measures to stabilize global warming, like seeding the oceans
with iron, injecting sulphur into the upper atmosphere and creating fake
clouds over the sea. The researchers say there have been very few
measures put in place to meet carbon emission reductions, and the
targets that have been put in place could fall far short. On top of that
the researchers say there is new evidence that the Earth’s climate is
even more sensitive to carbon emissions than previously thought. This
all leads the scientists to conclude that geoengineering techniques —
which have long been considered extreme, last resort measures — should
be studied and reviewed as possible options to combat climate
change....
Here’s our Top 10 List Of Most
Controversial Ways to Save the Planet, which we published last November:
- Ocean seeding:
More iron causes more plankton blooms; plankton eat carbon and when
they die sink to the bottom of the ocean, thereby sequestering it.
- Re-ice the Arctic:
A University of Alberta scientist proposes a fleet of 8,000 barges to
re-ice the Arctic with salty ice, thereby cooling the water and
keeping the conveyor belt moving.
- Sulfur solar shield:
Inject sulfur into the upper atmosphere, thereby creating a reflective
shield that would keep the Earth cool.
- Ocean-cooling pipes
:
An ocean-cooling pipe that would cool the ocean in front of
approaching hurricanes, as well as causing plankton blooms that could
act as a CO2 sink.
- Cloud seeding:
Shooting various things into the clouds to stimulate them into action
to create a reflective, cooling cover.
- Genetically Modified CO2-Eating Trees:
While all trees scrub CO2 from the air and produce the oxygen that we
breathe, scientists are looking into genetically modifying trees’
ability to “eat” carbon dioxide.
- Fake Plastic CO2-Eating Trees:
Modeled on trees’ ability to suck in CO2, these machines would pump
air “through a chamber containing sodium hydroxide, which reacts
with the CO2 to form sodium carbonate.” After a few more reactions,
there’d be pure CO2, which could be injected into the ground like a
regular old carbon storage system.
- Space mirrors:
Using mirrors to reflect sun rays back into space. The problem is that
they’d have to be huge and there would have to be a lot of them, and
launch costs could be in the thousands of dollars per pound.
- Reflective space mesh:
Proposed by Edward Teller, the father of the hydrogen bomb, this
reflective mesh would be placed out in space, about a million miles
between the sun and the Earth.
- Glacier Blankets:
Blanket glaciers with a special material designed to protect
high-value Alps skiing territory...."
AFP: World's
glaciers facing huge threat: UN
"The
United Nations said Monday that swathes of mountain ranges worldwide
risk losing their glaciers by the end of the century if global warming
continues at its projected rate. The UN Environment Programme (UNEP)
said in a report that whilst nature has always observed a certain
periodic rate of deglaciation, the current trends observed from the
Arctic to Central Europe and South America are of a different order.
"The ongoing trend of worldwide and rapid, if not accelerating,
glacier shrinkage on the century time scale is most likely to be of a
non-periodic nature, and may lead to the deglaciation of large parts of
many mountain ranges by the end of the 21st century," the report
warned. The report said that glaciers lost on average a mass of more
than half a meter water equivalent in the period 1996-2005, which is
twice the ice loss of the previous decade (1986-95) and over four times
the rate of the period 1976-85. The UNEP report comes shortly after
scientists warned that they could no longer rule out a fast-track
melting of the Greenland icesheet, which could see much of the world's
coastline drowned by rising seas...."