Science & Technology
11 Mar 2014:
'Space Frame' Wind Tower
Allows Turbines to Be Built in Remote Places
New wind power technology could bring turbines to hard-to-reach locations, according to engineers from General Electric
. The company has developed a new
type of wind tower, dubbed the "Space Frame Tower," consisting of metal latticework wrapped in weather-resistant fiberglass. Unlike conventional steel tube wind towers, the latticework can be bolted together on-site, which means the tower's framework can be transported using standard shipping containers and trucks, allowing taller wind towers to be installed in locations previously inaccessible to the longer trucks needed to transport conventional towers. The Space Frame Tower also has a five-leg base that's wider than conventional towers, increasing stability and ultimately allowing it to reach heights up to 450 feet — an advantage at sites where higher turbines can reach stronger winds. A 318-foot tall prototype is up and running in Tehachapi, California, with a 2.75 megawatt turbine nearly 400 feet wide.
06 Mar 2014:
Warm River Water Plays Major
Role in Arctic Sea Ice Melt, Study Finds
Relatively warm water flowing into the Arctic Ocean from rivers contributes significantly to Arctic sea ice melt each summer, a phenomenon that will intensify as the region warms, according to NASA researchers
. The river discharge not only melts coastal sea ice, it also has
a wider climate impact as it creates more open water, which is darker than ice and absorbs more heat from sunlight. As these NASA images show, when water from Canada's Mackenzie River flowed into the Beaufort Sea in the summer of 2012, average surface temperature of the open water rose by 6.5 degrees C (11.7 degrees F) after the pulse of river water. Flow from the Mackenzie raised sea surface temperatures as far as 350 kilometers (217 miles) from the coast. The researchers note that river discharge is becoming an increasingly important contributor to melting Arctic sea ice because the volume and temperature of fresh water discharge is increasing as inland Arctic areas warm more each summer.
05 Mar 2014:
Routes of Young Sea Turtles
Shed Light on Mystery of Turtles' Lost Years
By placing satellite tags on newborn sea turtles along the coast of Florida and tracking them in the western Atlantic Ocean, researchers have gained new insights
into the early migrations of threatened and endangered
turtles during their so-called "lost years" between hatching and returning to coastal waters as large juveniles. Rather than swimming in the currents of the North Atlantic gyre, as scientists had assumed, the young turtles actually leave the gyre and travel to the Sargasso Sea, which lies in the middle of the North Atlantic Ocean. While there, sensors on the turtles' shells registered more heat than the scientists expected, leading them to believe
that the young turtles swim near the surface of the Sargasso, basking in sunlight and feeding on a type of seaweed that grows in deep ocean waters. "From the time they leave our shores, we don't hear anything about them until they surface near the Canary Islands, which is like their primary school years," said an author of the study.
04 Mar 2014:
Atlanta Leads U.S. in
Electric Vehicle Sales Growth
Atlanta is the fastest growing market for electric cars in the U.S., according to an analysis
by the electric vehicle charging network ChargePoint. Electric vehicle (EV) sales in Atlanta jumped by 52 percent from the third quarter to the fourth quarter of 2013, with more than
3,000 EVs sold in the final three months of the year, according to state motor vehicle records. Washington, D.C., was the second-fastest growing market, with a 21 percent increase in sales, and Portland, Oregon, had the third-fastest growth, at 19.4 percent. While Los Angeles added the most EVs — more than 5,000 — to its streets, for a 19 percent growth rate, Atlanta outpaced it on a per capita and percent growth basis. Nationally, EV sales grew by nearly 450 percent
in the first three quarters of 2013 compared to the same period in 2012. ChargePoint's CEO speculated that popularity is increasing because charging station networks have expanded and EV designs have improved. "We’re well on our way to having twice the number of EVs on the road by the end of 2014," he said.
03 Mar 2014:
Harsh Winter Causing Large
Die-off of Invasive Insects, Researchers Say
As a frigid winter takes a toll on the United States and Canada, invasive insect populations are also taking a hit. The U.S. Forest Service estimates that up to 80 percent
of emerald ash borers, which have been decimating ash tree populations, were killed by long
Emerald ash borer
stretches of bitter cold in the the upper Midwest this year. Several other insect pests, many of which have migrated northward because of milder winters in recent years, also are faring poorly this winter, including corn earworms and gypsy moths. Researchers remain skeptical, however, that the die-offs will have lasting effects on pest populations. Emerald ash borers in Chicago, for example, survived the sub-zero weather because Chicago temperatures fell only to -17 degrees F, rather than Minnesota's -20 degrees F, which seems to be a critical temperature threshold for the pests.
28 Feb 2014:
Seafaring Drones Could Reveal
Mysterious Lives of Sharks, Researchers Say
New automated watercraft
are helping scientists understand the secret lives of great white sharks, which gather in large numbers each winter in an area nicknamed the "White Shark Cafe." Although this stretch of ocean between Baja California and Hawaii
contains relatively few food sources, the sharks congregate and display strange behaviors, perhaps related to mating or feeding, one researcher explained to the San Francisco Chronicle
. Scientists haven't had a way to efficiently track and observe sharks in this environment, but new seafaring drone technologies might change that. For example, drones could follow migrations by homing in on acoustic tags on the sharks themselves. Marine biologists at Stanford
were recently able to track two great whites on their journeys from California to Hawaii and the White Shark Cafe, as the map shows, but current technology only allows scientists to recreate the sharks' journeys after monitoring tags pop off and are recovered. The new drones may prove useful not only for tracking sharks and other pelagic fish in real time, but also for collecting important ocean data such as temperature, acidity, and salinity, researchers said.
27 Feb 2014:
Pine Forest Aerosols Play
Significant Role in Climate, Study Says
Pine forest vapors form small aerosol particles that may significantly cool the climate by reflecting the sun's energy back into space, according to new findings
. Scientists have known for decades that gases from pine
Hyytiälä pine forest in Finland
trees can form particles that grow from just 1 nanometer in diameter to 100 nanometers in about a day. The new research, published in Nature
, shows the rapid growth of these particles relies on a chemical chain reaction among pine-scented molecules and atmospheric ozone and oxygen. The growing particle then grabs others like it, eventually snowballing into a 100-nanometer particle — one that's large enough to condense water vapor, prompt cloud formation, and, ultimately, influence climate. Boreal or pine forests give off the largest amount of these compounds, so the finding is especially relevant for the northern parts of North America, Europe, and Russia. But other types of forests emit similar vapors, and the scientists think these may undergo similar rapid chemical reactions.
26 Feb 2014:
Large Offshore Wind Farms
Could Soften Blow of Hurricanes, Study Says
Offshore wind farms with thousands of wind turbines could have sapped much of the power of hurricanes Sandy, Katrina, and Isaac, significantly slowing their wind speeds, decreasing their accompanying storm surges, and possibly preventing billions of dollars in damages, according to a new study
. Computer models
used in the study said that deploying tens of thousands of offshore wind turbines could absorb enough energy from a hurricane to reduce peak wind speeds by 56 to 92 mph and storm surges by 6 to 79 percent. "We found that when wind turbines are present, they slow down the outer rotation winds of a hurricane," said Stanford engineer Mark Jacobson, who led the research. "This feeds back to decrease wave height ... which in turn slows the winds of the entire hurricane and dissipates it faster." For Hurricane Katrina, a massive turbine array could have slowed wind speeds by 58 percent and storm surge by 79 percent, and for Sandy wind speeds could have been cut by 14 percent and storm surge by 34 percent, according to findings published in Nature Climate Change
25 Feb 2014:
Massive Alaska Avalanche
Depicted in NASA Satellite Photograph
Southeastern Alaska recently experienced the largest landslide the planet has seen since 2010, and the aftermath is captured in this NASA satellite image
Triggered by the collapse of a near-vertical mountain face on the flanks of Mount La Perouse, 75 million tons of snow and sediment formed a debris flow nearly five miles long. The avalanche material appears light brown in contrast to the snow in the photo. Researchers at Columbia University first detected the event when seismic records from the region showed a large number of low-frequency waves; this satellite image and other aerial photos confirmed their hunch. The American Geophysical Union also posted this blog
featuring photographs from an Alaskan pilot who flew over the landslide.
21 Feb 2014:
Rewritable Paper and Water Ink
Could Cut Paper Waste, Scientists Report
A new type of rewritable paper that uses water as ink could slash the amount of paper that's wasted daily, researchers say
. The paper contains hydrochromic dyes — chemicals that change color when wet — and a single
page can be reused dozens of times, the scientists report in Nature Communications
. Other types of rewritable papers have been developed, but they are all more expensive and energy-intensive to produce, and some versions use inks that pose environmental and safety hazards. The new system costs less than 1 percent of standard inkjet printing, the researchers estimate, primarily because ink cartridges are expensive. The researchers found they could refill cartridges with water and use them, along with the rewritable paper, in typical desktop printers. Print on the rewritable paper is only visible for about 22 hours, or as long as it takes the paper to dry completely. The scientists note that, while 90 percent of business information is retained on paper, most printed documents are read only once before being discarded.
20 Feb 2014:
Global Forest Watch Tool
Allows 'Near-Real Time' Forest Monitoring
A new online tool
called Global Forest Watch employs a trove of high-resolution NASA satellite imagery and large amounts of computing power to help governments, conservation organizations, and concerned citizens monitor deforestation in "near-real
time." Organized by the World Resources Institute (WRI), Global Forest Watch
uses satellite data to track changes in forest cover since 2000. It's the first tool with the capability of monitoring forests on a monthly basis, potentially allowing groups to take action against deforestation while it's in progress. Businesses committed to eliminating deforestation from supply chains can also use the tool to verify that vendors are not engaging in practices that harm forests. A custom alert feature can also notify a user when there are signs of deforestation in a region the user has selected. "Businesses, governments and communities desperately want better information about forests," said WRI president Andrew Steer. "Now, they have it."
19 Feb 2014:
Loss of Arctic Sea Ice
Has Greater Warming Impact Than Expected
The steady disappearance of Arctic sea ice, which is causing the exposed and darker surface of the Arctic Ocean to absorb more sunlight, is having a more profound impact on global warming
estimated, according to a new study. The decline of albedo, or reflectivity, from the Arctic Ocean equals roughly 25 percent of the warming caused by rising carbon dioxide levels, according to scientists at the University of California, San Diego. The impact of this "albedo feedback," in which the highly reflective white surface of sea ice is replaced by heat-absorbing open ocean, is considerably stronger than climate models had predicted, according to the UCSD research
, published in the Proceedings of the National Academy of Sciences.
Researchers had thought increasing Arctic cloud cover might slow the albedo feedback, but this study indicates that is not happening.
17 Feb 2014:
New Maps Pinpointing Wind
Turbines Will Help Track Effects on Wildlife
More than 47,000 wind turbines dot the U.S. landscape, predominantly clustered in the Midwest and Great Plains, as a new interactive tool
developed by the U.S. Geological Survey (USGS) shows. The maps — the first
publicly-available, nationwide data set for wind energy generation — show the locations of every turbine in the U.S., from large wind farms to single turbines, and are accurate to within 10 meters. The maps are part of the USGS's effort to assess how wind turbines impact wildlife, and they show detailed technical information such as the make, model, height, area of the turbine blades, and capacity of each turbine. Turbine-level data will improve scientists’ ability to study wildlife collisions, the wakes causes by wind turbines, the interaction between wind turbines and ground-based radar, and how wind energy facilities overlap with migratory flyways, the USGS says.
Five Questions for Elizabeth Kolbert
On Facing Up to the Sixth Extinction
Elizabeth Kolbert's new book, The Sixth Extinction
, focuses on one of the most troubling realities of our age:
We are living in a period when, for only the sixth time in earth’s history, the diversity of species is contracting suddenly and rapidly — but now, we humans are the cause. For her reporting, Kolbert, an e360 contributor
and New Yorker
staff writer, traveled from the Peruvian Andes to Australia's Great Barrier Reef, probing the fate of a dozen species. Yale Environment 360
asked Kolbert five questions about the book and what she discovered in researching it.
11 Feb 2014:
Shrinking Household Size
May Offset Progress in Curbing Population
Household size — the number of people living together under one roof — has been shrinking worldwide, and the trend could have major consequences for resource consumption
, new research finds
. Although global population growth has been somewhat curbed in the developed world, the number of households has continued to grow at a much faster pace in nearly all countries, Michigan State University researchers found. Average household size in developed nations declined from approximately five members in 1893 to 2.5 in 2000, while the rapid decline in household size in developing nations began around 1987, according to the research
, which analyzed trends between the years 1600 and 2000. Smaller households are typically less efficient, with fewer people using proportionally more land, water, and energy. Constructing housing units also consumes lumber and building supplies, and generally requires building more roads and commercial areas. "This will put enormous strain on the environmental life support system we rely on, even if we achieve a state of zero population growth," one study author said.
10 Feb 2014:
New Plant Found in Andes
Supports up to 50 Species, Researchers Say
Researchers working in the Ecuadorian Andes have discovered a new species of black pepper plant
that is a nexus of biodiversity. The plant, named Piper kelleyi
, supports roughly 40 to 50 insect species, the scientists estimate, many of which are entirely dependent on the
Specialist herbivore Eios feeds on P. kelleyi
plant for survival. P. kelleyi
produces chemical compounds that are known to deter most herbivores, but a single type of caterpillar has adapted to overcome the toxicity of the plant's defenses. That caterpillar, in turn, is preyed upon by species of wasps and flies dependent on that specific caterpillar species — and ultimately the plant — for survival. Altogether, an assemblage of up to 50 species of herbivorous and predatory insects are dependent on P. kelleyi
, the researchers report in the journal PhytoKeys
05 Feb 2014:
Vast Forests and Frequent
Fires Were Key Causes of Ancient Warming
The release of volatile organic compounds from forests and smoke from wildfires had a far greater impact on global warming 3 million years ago than ancient atmospheric levels of carbon dioxide, a new study finds
. During the mid-Pliocene epoch, forests covered a much larger percentage of the planet, releasing large amounts of volatile organic compounds, according to Nadine Unger of the Yale School of Forestry & Environmental Studies. Those compounds are precursors to ozone and organic aerosols, which are both potent greenhouse gases. The dark foliage of the planet's abundant forests also absorbed large amounts of solar energy, another reason why the Pliocene was a relatively warm era even though atmospheric levels of CO2 were not exceptionally high. The research — based on earth-system modeling that used a supercomputer capable of processing 52 trillion calculations per second — provides evidence that dynamic atmospheric chemistry played an important role in past warm climates, underscoring the complexity of climate change, the authors write in Geophysical Research Letters
04 Feb 2014:
NASA Image of Alaska
Depicts Spring-like Temperatures and Thaw
As the continental U.S. faced frigid weather and major winter storms in January, Alaska experienced record high temperatures.
A map based on NASA satellite data
shows that the last half of January was one of the warmest winter periods in Alaska’s history, with temperatures as much as 40 degrees F (22 C) above normal on some days in the central and western portions of the state. A high pressure system off the state's western coast sent warm air and rain through Alaska instead of down into California, which is in the midst of a record drought. The warmest January temperature ever observed in Alaska was tied on January 27, when the thermometer hit 62 F (16.7 C) at Port Alsworth, in southern Alaska. Combined with rainstorms, the heatwave set off a host of spring-like effects, including avalanches and swollen rivers, which carried major sediment loads into the Gulf of Alaska. Inland, Arctic lakes are also seeing consequences of Alaska's long-term warming trend. A new study
found that lakes in the region froze almost six days later and broke up about 18 days earlier in the winter of 2011 compared to the winter of 1950.
30 Jan 2014:
NASA Animation Shows
Relentless Pace of Warming Since 1950
A 15-second NASA animation
shows the steady and rapid warming of the planet since the middle of the 20th century, with regions in the Arctic and Siberia warming as much as 2 to 4 degrees C (3.6 to 7. 2 degrees
F) above a long-term average. The animation begins in 1950, but the intensity of the yellow, orange, and red colors shows how much temperatures have increased compared to baseline temperature data collected from 1880 to the present. NASA said that nine of the planet's 10 warmest years have occurred since 2000, and worldwide surface temperatures continued to rise in 2013
, according to satellite and meteorological data. Since 1880, when atmospheric concentrations of CO2 were 285 parts per million (ppm), the average global temperature has risen 1.4 degrees F; atmospheric CO2 concentrations crossed a milestone of 400 ppm last year. "Long-term trends in surface temperatures are unusual and 2013 adds to the evidence for ongoing climate change," NASA scientist Gavin Schmidt said.
28 Jan 2014:
Peru Park Holds Record
Reptile and Amphibian Diversity, Study Finds
A new study crowns Peru's Manu National Park
as the place with the world's most diverse collection of reptiles and amphibians — 287 species in all. The park's 155 amphibian and 132 reptile species outnumber those in Ecuador's Yasuní National Park
, which, with 271 reptile
A glass frog from Manu's cloud forests
and amphibian species, was previously believed to contain the world's most diverse collection of reptiles and amphibians. Although Manu National Park represents only 0.01 percent of the world's land area, it houses 2.2 percent of all amphibian species and 1.5 percent of all reptile species, the researchers note. They attribute the rich diversity to the park's elevation gradient, which spans the Western Amazon's tropical rainforest up through high Andean cloud forests, providing a wide range of habitats. Manu also has record bird diversity — with 1,000 species, or 10 percent of the world's total species — and tremendous butterfly diversity, with 1,200 species. Scientists say the inventory of the national park's richness is far from complete. DNA analyses, frog call studies, and other techniques will likely reveal even more diversity, the authors note in the journal Biota Neotropica
Interview: How Citizen Science Is
Aiding and Democratizing Research
When biologist Caren Cooper
carries out her avian studies, she’s aided by thousands of assistants, none of whom are paid for their work. That’s because Cooper, a research associate at the Cornell Lab of Ornithology
, relies on the help of so-called citizen scientists, volunteers from across the country who contribute data
to her research projects. These lay people provide information that enables her and other scientists to study bird life in ways that would otherwise be impossible. But, as Cooper notes in an interview with Yale Environment 360
, the uses of citizen science go well beyond bird research. Bushmen in the Kalahari are using apps to document wildlife and natural resources that need to be protected. Environmental activists also are employing open-source technology to measure and monitor pollution, including the deployment of kites and balloons to document such events as the Deepwater Horizon oil spill. “A lot of the ways for us to move forward in certain fields require massive collaboration,” says Cooper. “And so we’re building all the infrastructure for these collaborations, all of the web tools — whatever we need to make that happen.”
Read the interview.
27 Jan 2014:
Changes in Humidity
Are Used to Generate Electricity
Researchers have created a new kind of generator that uses bacterial spores to harness the untapped power of evaporating water
. Scientists from Harvard and Columbia universities have created small, prototype generators by coating a sheet of rubber with a soil
Bacillus subtilis bacterial spores
bacterium, Bacillus subtilis
, that greatly expands and contracts with changes in humidity. Building a generator out of Legos, a miniature fan, a magnet, and the spore-covered sheet of latex, the researchers used the humidity-driven flexing of the rubber sheet to drive the movement of the magnet, which generated electricity. The developers of the potential renewable energy technology said that large electrical generators could one day be powered by changes in humidity from sun-warmed ponds and harbors. The scientists said that moistening and then drying a pound of the spores produces enough force to lift a car one meter. “If this technology is developed fully, it has a very promising endgame,” said Columbia University researcher Ozgur Sahin.
24 Jan 2014:
Future Olympic Winter Games
At Risk as Climate Warms, Researchers Warn
As few as six of the world's previous 19 Olympic Winter Games sites will likely still be wintry enough to host snow sports at the end of the century, according to a report
by Canadian and Austrian researchers. Iconic locales such as Squaw Valley, Utah, and Vancouver,
Vancouver, 2010 winter games host, is warming.
Canada, will likely be too warm by the middle of this century. Even under conservative climate change scenarios, only 11 of the 19 sites would remain climatically stable enough to reliably host the games, the study found
. Olympic organizing committees consistently cite poor weather as a major challenge for the winter games, and it's likely to get more challenging: The average February daytime temperature of winter games locations has steadily increased — from 0.4 degrees C at games held in the 1920s to 1950s, to 3.1 degrees C in the 1960s to 1990s, to 7.8 degrees C so far in the 21st century. These sites will likely warm by an additional 2.7 to 4.4 degrees C by the end of the century, according to the report.
22 Jan 2014:
New Virus Associated With
Massive Bee Die-Offs, Researchers Report
A rapidly mutating virus may be partially responsible for the massive bee die-offs known as colony collapse disorder (CCD), which has wiped out a third of commercial bee colonies annually for the past seven years, a group of U.S. and Chinese researchers reports
. Most scientists, including the study's authors, believe CCD is triggered when colonies are weakened by a combination of factors
, such as viruses, parasites, and perhaps pesticides. The study, published
in the journal mBio
, found in bees a variant of the tobacco ringspot virus, an RNA virus that likely jumped from tobacco plants, to soy plants, to bees. Weak bee colonies began succumbing to massive die-offs in autumn, and the researchers found those bees were heavily infected with tobacco ringspot — which is believed to affect honeybees' nervous systems — and other viruses. Strong colonies that made it through the winter showed no evidence of infection by tobacco ringspot. The researchers believe the virus jumped from plants to bees through "bee bread," a concoction of pollen, nectar, and saliva they feed their larvae. Bee infection by tobacco ringspot is the first known instance of a virus from pollen jumping to bees.
20 Jan 2014:
Soil Microbes Can Alter DNA
In Response to Climate Change, Study Says
A 10-year study of soil ecosystems
has determined that microbes alter their genetic code in response to a warming climate so they can process excess carbon being absorbed by plants from the atmosphere, a team of U.S. researchers reports in the journal Applied and Environmental Microbiology
. A 2-degree Celsius temperature increase spurred microbes in soil ecosystems to, over many generations, tweak their DNA, amping up their respiratory systems and converting extra organic carbon in the soil to CO2. The soil contained extra carbon because the 2-degree temperature increase made plants grow faster and higher; when those plants began to die, the carbon in their leaves, stems, and roots was added to the soil and taken up by the microbial community. Understanding the "black box" of carbon's fate in soil ecosystems holds important clues for better forecasting an ecosystem's response to climate change, says Georgia Institute of Technology researcher Kostas Konstantinidis, an author of the study. "One reason that models of climate change have such big room for variation is because we don’t understand the microbial activities that control carbon in the soil," he said.
15 Jan 2014:
West African Lions Are
Critically Close to Extinction, Study Says
West African lions are close to extinction, and vulnerable populations could be wiped out in the next five to 10 years, according to new research
led by the wild cat conservation group Panthera. West African lions, which are genetically distinct from other African lions, once numbered in the tens of thousands. Now the
Male West African lion
population has been reduced to around 400 individuals spread across 17 countries, largely due to habitat loss, a shortage of prey, and poaching, according to the study published in PLOS ONE
. Of the remaining lions, only about 250 are mature enough to reproduce, but in many cases those individuals are spread too far apart to breed. West African lions are now present in only 1.1 percent of their original habitat and should be considered "critically endangered," according to the study. Running low on habitat and prey, the lions sometimes kill livestock. Villagers then kill the lions in revenge. "It's become very complicated for this carnivore at the top of the food chain to find enough space and food to survive," one scientist told Reuters.
14 Jan 2014:
Google's Acquisition of Nest
Expected to Boost Smart Grid Expansion
Google's purchase of Nest, a leading manufacturer of smart thermostats, further deepens the Internet search giant's involvement in the green energy sector and is likely to help accelerate development of a more efficient
smart grid, experts say
. Google has already invested $300 million in distributed solar companies, which have been helping homeowners install photovoltaic panels to offset their conventional grid-based power consumption. The success of distributed solar hinges on effective smart-metering, and acquiring Nest — whose thermostats can be controlled remotely and can track and reduce energy consumption — could help Google gain valuable insight into millions of individuals' daily power consumption patterns, Quartz reports. As power grids and meters get "smarter," demand for technology like Nest's thermostats will likely grow; incorporating distributed solar energy sources should become easier for households, as well. The $3.2 billion deal will also give Google access to Nest Energy Services, a branch of the company that manages partnerships between Nest and U.S. power companies.
13 Jan 2014:
Pine Island Glacier Has
Melted Beyond Tipping Point, Study Says
A major Antarctic ice mass, the Pine Island Glacier, is melting irreversibly and could add as much as a centimeter to global sea level rise over the next 20 years alone, according to new research published in Nature Climate Change
. Calculations show that the Pine Island Glacier's "grounding line" — where land-based ice meets a floating ice shelf that is an extension of the
glacier — has retreated roughly 10 kilometers in the past decade. Scientists say that the grounding line is in the process of a 40-kilometer retreat that could push it beyond an important tipping point. Pine Island Glacier is a major contributor to global sea level rise
and has been losing massive amounts of ice for decades, accounting for 20 percent of the West Antarctic Ice Sheet's total ice loss
. An international research team says that the Pine Island Glacier has been losing 20 billion tons of ice annually for the past two decades and could lose 100 billion tons annually over the next 20 years. The glacier "has started a phase of self-sustained retreat and will irreversibly continue its decline," says Gael Durand, a glaciologist with France's Grenoble Alps University.
02 Jan 2014:
Stranded Antarctic Expedition
Rescued After Being Icebound for Nine Days
Passengers trapped on an icebound Russian research ship off the coast of Antarctica were rescued today after being stranded
for more than a week. A helicopter from China shuttled the 52 scientists, journalists, and tourists to an Australian icebreaker. The chartered ship was attempting to recreate the century-old travels and scientific work carried out by the East Antarctic research expedition led by Douglas Mawson in 1911. The Russian ship, which set out from New Zealand on December 8, became trapped in thick pack ice that even icebreakers could not penetrate. Because it was a privately chartered expedition, the voyage was not subjected to the same rigorous safety requirements that a research trip funded by government agencies would have been, scientists said. Some scientists contended that the lack of preparation sparked a rescue effort that diverted ships, crew, and other important resources
from other research efforts elsewhere in Antarctica.
31 Dec 2013:
Atlantic Ocean Zooplankton
Are Now Reproducing in Arctic Waters
For the first time, scientists have discovered species of Atlantic Ocean zooplankton reproducing in Arctic waters
. German researchers say the discovery indicates a possible shift in the Arctic zooplankton community as
The amphipod Themisto compressa
the region warms, one that could be detrimental to Arctic birds, fish, and marine mammals. Studying traps that have been suspended for 13 years in the Fram Strait, scientists from the Alfred Wegener Institute found that small species of crustaceans common to the Atlantic are increasingly moving into Arctic waters. The researchers found fertile females as well as individuals at all stages of development, showing that the Atlantic species is reproducing in the frigid waters. The one-centimeter amphipods are smaller than respective Arctic species, meaning that the spread of the Atlantic crustaceans northward could reduce the volume of food available to Arctic predators. The research was published in the journal Marine Ecology Progress Series