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.
03 Feb 2014:
Greenland's Jakobshavn Glacier
Is Moving at Record Speeds, Study Finds
Greenland's Jakobshavn Glacier is flowing into the ocean at a record pace of more than 17 kilometers per year, according to research
by U.S. and German scientists. The glacier, which drains 6 percent of the
massive Greenland ice sheet, moved at a rate of 46 meters per day in the summer of 2012 — four times the glacier's 1990s summer pace. The unprecedented speed appears to be the fastest ever recorded for any glacier or ice stream in Greenland or Antarctica, the researchers report in the journal The Cryosphere
. Scientists estimate the glacier added about 1 millimeter to global sea levels from 2000 to 2010; its faster flow into the ocean means Jakobshavn will add even more water over the current decade. Widely thought to be the source of the iceberg that sunk the Titanic
in 1912, the researchers say Jakobshavn is flowing at record speeds because its front edge, called the calving front, now overlies a particularly deep spot on the ocean floor. "As the glacier’s calving front retreats into deeper regions, it loses ... the ice in front that is holding back the flow, causing it to speed up," the lead researcher explained.
31 Jan 2014:
U.S. State Department Report
Boosts Prospects of Keystone XL Pipeline
In a long-awaited report, the U.S. State Department has concluded that the carbon-heavy oil from Alberta's tar sands will be extracted whether or not the Keystone XL pipeline is built, improving the prospects
that the highly controversial project will be built. In an environmental impact statement
that was six years in the making, the State Department concludes that the process of extracting and burning tar sands oil creates 17 percent more greenhouse gases than traditional oil, but that the heavily polluting oil will be brought to market with or without the pipeline. "It's unlikely for one pipeline to change the overall development of the oil sands," said a State Department official. If completed, the pipeline would carry 830,000 barrels of oil a day from Alberta to refineries on the coast of the Gulf of Mexico. President Obama will make the final decision on the Keystone XL pipeline and he vowed last year that he would approve the pipeline only if it would not "significantly exacerbate" the problem of carbon emissions. Environmental activists such as Bill McKibben of 350.org have said it would be "game over" for the climate if Keystone XL is built.
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.
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.
23 Jan 2014:
NASA Images Show Severity
Of California's Record-Setting Drought
A pair of NASA images, taken a year apart, show the profound impacts
of California's current drought, which Gov. Jerry Brown said yesterday poses a major threat to California's environment
and economy. A satellite image taken last Saturday shows virtually no snow cover
in the Coast Range and Cascade Mountains, and only a modest amount of snow in the Sierra Nevada. Officials say the snowpack is only 10 to 30 percent of normal levels. In addition, California's vital agricultural areas in the Sacramento and San Joaquin valleys, which lie west of the Sierra Nevada, are a parched brown. By contrast, a satellite image taken in January 2013 shows significant snowpack in the mountains and a swath of green in the Sacramento and San Joaquin Valleys. Half of California's yearly precipitation falls between December and February, so January's record dry conditions threaten water supplies for the entire year.
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.
Interview: Activist Kumi Naidoo
On Russia and the Climate Struggle
Kumi Naidoo, the international executive director of Greenpeace, is intimately familiar with the Prirazlomnaya drilling platform in the Russian Arctic. In 2012, he and five other Greenpeace activists were hosed down with frigid water and pelted with pieces of metal as they attempted to climb aboard the platform.
Greenpeace and Prirazlomnaya were back in the news recently when 28 Greenpeace members were arrested and held for several months for storming the rig before being released in December. In an interview with Yale Environment 360
, Naidoo talks about what’s needed to get global climate talks off the ground and launch a green energy revolution, and the reason his activist organization has decided to take such a strong stand against oil drilling in the rapidly melting Arctic Ocean. "We went back [to Prirazlomnaya]," says Naidoo, "because we’re trying to draw a line in the ice, because once this starts it will have breached another threshold of meeting our rapacious appetite for oil and gas in the most fragile of environments." Read the interview.
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.
10 Jan 2014:
Natural Gas Has Sharply
Reduced Emissions from Power Plants
The dramatic increase in using natural gas to produce electricity in the United States has led to an equally dramatic decline
in the amount of pollutants and carbon dioxide emitted from the nation’s power plants, according to a new study. The study, conducted by researchers at the National Oceanic and Atmospheric Administration, showed that the switch from coal-fired to natural gas-fired power plants has reduced CO2 emissions by 23 percent and emissions of nitrogen oxides and sulfur dioxide by 40 and 44 percent, respectively. Examining power plant emissions from 1997 to 2012, the scientists found that new combined-cycle natural gas-fired power plants — which use two heat engines in tandem to convert a higher fraction of heat into electrical energy — emit less than half the amount of CO2 as coal-fired power plants. The study, to be published in the journal Earth’s Future
, said that the fraction of electricity produced in the U.S. from coal fell from 83 percent in 1997 to 59 percent in 2012. Meanwhile, the fraction of electricity generated by combined-cycle natural gas plants rose from zero to 34 percent.
09 Jan 2014:
Faced With Sea Ice Loss,
Emperor Penguins Alter Breeding Tactics
Confronted with the loss of sea ice in some parts of Antarctica, four colonies of emperor penguins have come up with an innovative breeding strategy
to adapt to their changing environment. Using satellite images,
an international team of scientists tracked the four colonies from 2008 to 2012. In the first three years, the emperor penguins hatched and incubated eggs in their customary fashion — atop the sea ice that freezes during the Antarctic winter and spring. But in 2011 and 2012, sea ice did not form until a month after the breeding season began. As a result, the emperor penguins, which are the largest penguin species on earth, did something never before witnessed by scientists: They climbed the nearly sheer walls of large, floating ice shelves — huge structures, often hundreds of square miles in extent, that flow from land-based glaciers into the sea. In the region of the four colonies, the ice shelf walls reach as high as 100 feet. The scientists say the altered breeding behavior could demonstrate how ice-dependent emperor penguins may adapt to a warming world.
08 Jan 2014:
China Approves Major
Increase in Huge Coal Mining Projects
In 2013, the Chinese government approved 15 large coal mining projects
that will produce more than 100 million new tons of coal a year. The expansion will lead to a 2 to 3 percent growth in coal production over the next several years, even as the country announced moves to reduce the severe air pollution
choking major cities such as Beijing. Chinese officials will increase coal production while reducing pollution in population centers by closing outdated coal plants and creating huge “coal bases” that will mine and burn coal in remote regions of northwestern China, such as Inner Mongolia. Those bases, which will cost $8.9 billion to build, will generate electricity that will be transferred over an improved electricity grid to cities in China’s central and eastern regions. Deng Ping, an environmental campaigner with Greenpeace, said the scale of the new coal bases is unprecedented for China, adding, “Despite the climate change pressure, water resource scarcity, and other environmental problems, the coal industry is still expanding fast in northwest China.”
07 Jan 2014:
Suburbs Offset Low Carbon
Footprints of Major U.S. Cities, Study Finds
City-dwellers in the U.S. have significantly smaller per-capita carbon footprints than their rural counterparts, according to new research
from the University of California, Berkeley. But the carbon-intense suburbs surrounding major cities essentially cancel out the small carbon footprints of city residents,
the study found. Vehicle emissions accounted for the majority of carbon dioxide produced in the suburbs, reflecting suburbanites' longer commutes to work, school, and stores. The study looked at 37 factors — including weather, income, home size, and transportation data — to estimate household carbon footprints. The average carbon footprint of households living in the center of large, densely populated cities is about 50 percent below the national average, while households in distant suburbs have carbon footprints up to twice the national average, according to the study published in Environmental Science & Technology
Interview: A Legal Call to Arms to
Fix Environmental and Climate Ills
University of Oregon law professor Mary Wood has an unsparing view of the state of environmental protection in the United States today: On a host of fronts — from climate change to the nationwide fracking boom —
the federal and state governments are failing to protect ecosystems and resources vital to current and future generations. In an interview with Yale Environment 360
, Wood discusses why she believes the judiciary needs to step in to force the executive and legislative branches to protect natural resources that are part of the “public trust.” She also explains why she supports ongoing litigation to reduce carbon emissions under a related doctrine to safeguard the "atmospheric trust." Says Wood, "The political branches of government are doing next to nothing to address this crisis ... Across the board, agencies are not using the statutes to protect nature — they’re using statutes to permit damage to the environment."
Read the interview.
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
26 Dec 2013:
Solar Activity Not a Major
Factor in Climate Change, Study Finds
Solar activity has had minimal impact on climate over the past millennium, new research
from the United Kingdom indicates. The findings counter the long-held view that periodic fluctuations in the sun's energy output have led to lengthy periods of warm or cold weather in the past. Looking at climate records from the Northern Hemisphere over the past 1,000 years, the scientists found that greenhouse gases have been the primary drivers of climate change since about 1900. Volcanic activity, which adds particles to the atmosphere that block sunlight, dominated climate patterns until roughly 1800, the study found. "Until now, the influence of the sun on past climate has been poorly understood," said Andrew Schurer of the University of Edinburgh and lead author of the study, which was published in Nature Geoscience
. "We hope that our new discoveries will help improve our understanding of how temperatures have changed over the past few centuries, and improve predictions for how they might develop in future."
19 Dec 2013:
Los Angeles Becomes First
Major U.S. City to Adopt Cool Roof Rule
The Los Angeles City Council has voted unanimously to require "cool roofs" for all new and refurbished homes, becoming the first major U.S. city to do so
. "Cool roofs" incorporate light- and heat-reflecting building materials, which can lower the surface temperature of the roof by up to 50 degrees F on a hot day, according to Climate Resolve
, the local organization that pushed for the ordinance. Such roofs do not necessarily need to be white, the Global Cool Cities Alliance says; they can also be shades of gray, or even red. Research suggests that by mid-century temperatures in Los Angeles will increase by 3.7 to 5.4 degrees F, with the number of days above 95 degrees F tripling in the city's downtown. "The changes our region will face are significant, and we will have to adapt," said UCLA scientist Alex Hall, who led the research. The mandate will not cost homeowners additional money because of expanded incentives.
Photo Essay: Documenting the Swift
Change Wrought by Global Warming
For 25 years, photographer Peter Essick has traveled the world for National Geographic
magazine, with many of his recent assignments focusing on the causes and consequences of climate change. In a Yale Environment 360
photo essay, we present a gallery of images he took while on assignment in Antarctica, Greenland, and other far-flung locales affected by climate change. View the photo gallery.
17 Dec 2013:
Australian Coal Projects
Threatened by Drop in Demand From China
Major Australian coal projects risk losing value due to falling demand from China, where leaders are increasingly concerned about growing public anger over severe air pollution, a new analysis from Oxford University
has found. Future coal mining projects are vulnerable to being "stranded" by a range of policy changes from the Chinese government, including environmental regulation, carbon pricing, investment in renewable energy, and energy efficiency, the report said. One expert told The Guardian
that global investors are already questioning the prudence of financing new fossil fuel projects
. Backers of a handful of upcoming Australian coal projects "should seek clarity" on the associated costs, the Oxford analysis warns. It also cautions that Australian state governments could suffer if projects are mothballed or abandoned. Of particular concern are two mega-mines supported by Australia's Prime Minister Tony Abbott
slated for development in Queensland. Once running at full capacity, the two projects combined would produce enough coal to emit more than 70 millions tons of CO2 a year.
Five Questions For Jerry Brown
On the West Coast Climate Pact
California Governor Jerry Brown was one of the moving forces behind a new agreement among three Western states and British Columbia to align their policies to combat climate change. Under the pact, signed on Oct.
28 by Brown and the governors of Oregon and Washington, the states and the province agreed to a series of actions, including putting a price on carbon and adopting a low-carbon fuels standard. Yale Environment 360
spoke with Brown and asked him five questions about the pact and overall efforts to tackle climate change.
04 Dec 2013:
New Paper Offers Sweeping
Plan to Decarbonize the Global Economy
Eighteen prominent international climate scientists and economists have authored a paper
that seeks to answer the most vexing environmental question facing the planet: How to reverse soaring carbon dioxide emissions and prevent the world from experiencing destabilizing climate change. Their answer, presented in the journal PLOS One,
boils down to this: Offer global leaders a detailed blueprint for decarbonization that involves setting a steadily rising price on carbon, the large-scale deployment of nuclear power and renewable energy, increased research into low-carbon energy technologies, and a reform of forestry and agricultural policies that leads to massive sequestration of CO2 — all while not spending more than 1 percent of global gross economic output. “In terms of economics, comparing a path to decarbonization versus a path of wrecking the planet are not even close,” economist Jeffrey Sachs, a co-author of the paper and director of Columbia University’s Earth Institute, said at a press briefing. “We haven’t shown the path of decarbonzation clearly enough (and) what the real choices are.”
27 Nov 2013:
China Set to Open
World's Second Largest Carbon Market
China is in the midst of launching seven carbon markets, the largest of which will open next month in Guangdong
, the country's most populous province. The carbon markets are a key element of China's plan to cut carbon emissions by up to 45 percent per unit of GDP by 2020. The Guangdong carbon permitting scheme will cap 2013 emissions at 350 tons for 202 companies in the heavily industrialized province. Twenty-nine million permits will be auctioned in the market this year and next, which will be the world's second largest carbon market after the European Union's, dwarfing carbon markets in Australia and California. In 2015 the number of permits auctioned will more than triple, officials said. Shanghai's carbon market launched yesterday and a similar market, about a quarter of the size of Guangdong's, is set to open in Beijing tomorrow. China's seven carbon markets together will regulate roughly 700 to 800 million tons of CO2 annually, roughly equal to the annual emissions of Germany.
25 Nov 2013:
Despite Discord, Climate Talks
in Warsaw End With Last-Minute Deals
After more than 36 hours of continuous negotiations, delegates at the U.N. climate talks in Warsaw agreed to two last-minute deals that kept alive hopes for staving off climate change. At talks that ended Saturday, delegates agreed to a proposed system for pledging cuts in greenhouse gas emissions. They also gave support to a new treaty mechanism for tackling the human cost of the effects of global warming, including floods, rising seas, and stronger storms, The New York Times reports
. Parties also agreed that countries will have until early 2015 to lay out their plans for cutting greenhouse gas emissions. Those plans are to be published in advance of a major U.N. climate meeting in Paris, set for late 2015, at which international leaders hope to reach an agreement to curb global emissions starting in 2020. Discord and acrimony characterized the talks, during which a vocal negotiating bloc emerged among developing countries, including India, China, and Saudi Arabia. This bloc forced the watering down of key aspects of the deal, according to the Guardian
21 Nov 2013:
U.K. Government Pledges
To Stop Backing Foreign Coal Power Plants
The United Kingdom has joined the U.S. in pledging
to stop using government funds to finance coal-fired power plants in other countries. "The two governments are going to work together to secure the support of other countries ... and the multilateral development banks to adopt similar policies," Britain's energy secretary told journalists gathered in Warsaw at the U.N. climate talks. The U.S. made the same pledge last month in an attempt to slow CO2 emissions from the world's coal-fired power plants. The International Energy Agency reports that coal accounted for 44 percent of global carbon emissions in 2011, and the fossil fuel remains the world's largest source of electricity and heat. While many diplomats applaud the U.K.'s move, U.N. Secretary General Ban Ki-moon and environmental groups are pushing for even stronger action, including more spending on renewable energy. "The rapid development of low-carbon infrastructure needs large injections of public capital," Ki-moon said.
20 Nov 2013:
Low-Income Solar Project
Is Recognized at U.N. Climate Talks
An Australia-based solar start-up company was recognized at the U.N. climate change talks in Warsaw for its work replacing highly polluting kerosene lamps with solar lighting in low-income regions of India. The company, Pollinate Energy, trains members of local communities to install household solar-powered lights in India's slums, where families often rely on kerosene for lighting. So far the project has installed solar-powered lighting systems for 10,000 people in 250 of Bangalore’s slum communities, in turn saving 40,000 liters of kerosene and 100,000 kilograms of carbon emissions, RenewEconomy reports
. The solar lighting systems are cheaper to operate than kerosene lamps and are less polluting and dangerous than kerosene, which can cause house fires and severe burns. The nonprofit project started in Bangalore — home to some of India's worst slums — as a way for children to do schoolwork after sunset. Pollinate Energy trains local installers to distribute and install the lighting systems as micro-entrepreneurs, which they call "pollinators."
18 Nov 2013:
U.N. Climate Chief Says
Many Coal Reserves Must Be Left in Ground
United Nations climate chief Christiana Figueres said that coal power can be part of the solution to curbing global warming, but it would require shuttering older coal power plants, advancing carbon capture and storage (CCS) technology, and resolving to leave much of the planet's existing coal reserves in the ground. Her remarks, given at the International Coal and Climate Summit in Warsaw, are drawing criticism from environmentalists who oppose continued reliance on coal power. John Gummer, the chair of the U.K.'s climate advisers and former U.K. environment minister, told the Guardian
that "calling coal a clean solution is like characterizing sex trafficking as marriage guidance." Figueres said that coal power holds promise as a means of helping poorer countries develop their economies and reduce poverty, but said that the industry "must change." Figueres joins the growing list
of climate leaders who say that more than half of remaining fossil fuel reserves must be left in the ground
in order to avoid massive carbon emissions that could destabilize the climate.
12 Nov 2013:
China's Renewable Power
Sector Set to Outpace Rest of World by 2035
China is on track to generate more electricity from renewable energy by 2035 than the U.S., the European Union, and Japan combined, the International Energy Agency (IEA) said in a new report
. In its World Energy Outlook report, the IEA also said that by 2035 renewable energy sources — wind, solar, hydropower, and biomass — will make up more than 30 percent of the world's electricity supply, surpassing natural gas and rivaling coal as the leading energy source. Wind and solar photovoltaic power will see especially large gains, helping renewable energy account for nearly half the increase in global power generation over the next two decades, the IEA said. Carbon emissions related to energy generation will likely rise by 20 percent over that time, the report said, but policies and initiatives in the U.S., China, Europe, and Japan may help limit those emissions. "The right combination of policies and technologies is proving that the links between economic growth, energy demand and energy-related carbon dioxide emissions can be weakened," the IEA said.
11 Nov 2013:
Ozone Treaty From 1987
Has Also Slowed Global Warming
The 1987 Montreal Protocol, an international treaty designed to protect the ozone layer by banning chlorofluorocarbons (CFCs), has also slowed global warming since the mid-1990s, a new analysis has found
. The ban has lowered global temperatures by about 0.2 degrees F since it was enacted, scientists report in the journal Nature Geoscience
. Researchers say that's a significant decline considering the planet has warmed by an average of 1.6 degrees F since 1900. CFCs, a class of refrigerants banned because of their ozone-depleting qualities, are also powerful greenhouse gases, with warming potentials many thousands of times higher than CO2. A widely used replacement for CFCs — hydrofluorocarbons, or HFCs — are less powerful greenhouse gases, but negotiations are underway to amend the Montreal Protocol to apply to HFCs as well. The study's lead author, Francisco Estrada of the National Autonomous University of Mexico, told Climate Central that by "pure luck" the Montreal Protocol has effectively slowed global warming, even more so than the Kyoto Protocol, which was was directly aimed at reducing greenhouse gas emissions.
Interview: Using Robots to Unlock
Mysteries of CO2 and the Oceans
As climate change accelerates, scientists are focusing on the key role the world’s oceans play in absorbing half the planet’s carbon dioxide. But the precise mechanisms
Robotic Wave Glider
by which the oceans remove carbon from the atmosphere and the consequences for marine life remain poorly understood. That has led Tracy Villareal, a professor of marine science at the University of Texas at Austin, to devote his research to diatom phytoplankton. To better understand how these tiny organisms mitigate climate change, Villareal has become a pioneer in the use of a wave- and solar-powered ocean-going robot, known as the Wave Glider. In an interview with Yale Environment 360
, Villareal discusses why unlocking the secrets of diatoms is critical to understanding climate change and how deploying robots will revolutionize marine science. “There are all sorts of wild robotic systems under development,” he says. Read the interview.
08 Nov 2013:
Antarctic Researchers Discover
Strips of Rock That Slow Flow of Glaciers
Narrow ribs of dirt and rock beneath Antarctic glaciers help slow the glaciers' flow into the sea, according to new research
from scientists at Princeton University and the British Antarctic Survey. Using satellite measurements of the Pine Island Glacier and Thwaites
Glacier, both in West Antarctica, researchers discovered bands they call "tiger stripes" underlying the glaciers. The stripes serve as zones of friction and prevent sliding, much like non-slip flooring, the researchers report in Science
. Understanding the factors that control the glaciers' flow to the sea is important because their melting contributes significantly to sea level rise. The Pine Island and Thwaites glaciers are particularly important, as together they've contributed about 10 percent of the observed global sea level rise over the past 20 years.