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06 Mar 2015: Los Angeles City Council Says
Vegetables Can Be Grown Along Sidewalks

The Los Angeles, California, City Council voted this week to allow residents to grow fruits
lionfish

Planting in a parkway in Los Angeles, Calif.
and vegetables in the small strips of city-owned land between the sidewalk and street. Doing so used to require a $400 permit, essentially preventing lower-income residents from using the green spaces, which are also known as parkways. Community groups have been pushing for many years to do away with the permit fee in hopes of improving low-income communities' access to healthy foods, and the council has been working on the ordinance change for almost two years. The mayor is expected to approve the change next week, and if he does, the ordinance will go into effect in 30 days.
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24 Feb 2015: New Map Shows Background
Noise Levels Across the United States

A new map by the U.S. National Park Service (NPS) shows America's quietest and noisiest places. The park service

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U.S. background noise levels

Background noise levels
mapped background noise levels across the country on an average summer day using 1.5 million hours of acoustical data. The quietest areas of the country, such as Yellowstone National Park in Wyoming, are shown in deep blue on this map and are likely as quiet now as they were before European colonization, NPS researchers say. They are collecting the data as part of an effort to determine whether and how wild animals are affected by anthropogenic noise pollution. Owls and bats, for example, rely on hearing faint rustles from insects and rodents, and scientists think human-driven noise could be drowning out those subtle signals in many areas of the country.
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20 Feb 2015: Wind Produced 10 Percent of
Texas Electricity in 2014, Grid Operator Says

More than 10 percent of the electricity used in Texas last year came from wind turbines, according to the Electric
wind plant locations in Texas

General locations of wind plants in Texas.
Reliability Council of Texas, which operates the state's electric grid. Wind's share of the Texas electric mix grew from just over 6 percent in 2009 to 10.6 percent in 2014. During that period, wind power generation actually doubled — rising from 18.8 million megawatt-hours to 36.1 million — while total electricity generation in Texas also rose by 11 percent. The share of electricity generated by wind power in Texas is more than double the U.S. figure of 4.4 percent. The growth in wind generation in Texas is a result of new wind plants coming online and grid expansions that have allowed more wind power to flow through the system to consumers, the council said.
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19 Feb 2015: New York City Set for Major
Sea Level Rise By 2050, Report Concludes

The waters surrounding New York City are on track to rise 11 to 21 inches by the 2050s, according to an analysis based on

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New York sea level rise

Future NYC flood zones
NASA climate change models. The city's average temperature, which has increased by 3.4 degrees F since 1900, is set to rise another 5 degrees F by the 2050s, the report says, and annual precipitation is also likely to rise significantly over that period. New York City has already seen sea levels rise by over 1 foot since 1900 — nearly twice the average global rate, according to the report, which was published by the New York City Panel on Climate Change. Mayor Bill de Blasio said the report highlights the urgency of mitigating climate change and adapting to its risks, and he announced a commitment to cut the city's emissions by 80 percent by 2050.
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18 Feb 2015: Disease-Carrying Ticks Expand
Range and Emerge Earlier in Warmer Climate

Warmer spring temperatures in the northeastern U.S. are leading to shifts in the emergence of ticks that carry Lyme
blacklegged tick

Adult blacklegged tick
disease, and milder weather is allowing ticks to spread into new geographic regions, according to findings published this week. The data — which span 19 years and include observations of more than 447,000 ticks — show that the insects emerged nearly three weeks earlier in warmer years. And when fall temperatures were mild, a smaller percentage of larval ticks entered dormancy and waited until spring to feed, the study found. "Here in the Northeast, warming is already having an effect, and people need to be tick-vigilant before May, as potentially infected nymphal ticks are searching for their blood meals earlier and earlier," said co-author Richard S. Ostfeld, an ecologist at the Cary Institute.
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13 Feb 2015: Study Says U.S. Southwest Set
To Face Unprecedented Drying This Century

The U.S. Southwest and Great Plains are on track to face persistent drought during the second half of this century,

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risk of future drought

Risk of future prolonged drought in the Southwest
a new study forecasts, and the drought will be worse than anything seen in modern history or even during ancient so-called "megadroughts." Many studies have predicted that the Southwest could dry due to human-induced climate change, but this is the first to say that such drying could exceed the worst conditions of the distant past. The impacts of such a future drought would be devastating, the researchers say, given the region’s much larger population and heavy reliance on water and other natural resources. “The surprising thing to us was really how consistent the response was over these regions, nearly regardless of what model we used or what soil moisture metric we looked at,” said lead author Benjamin I. Cook, a researcher with Columbia University and NASA.
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12 Feb 2015: Mange in Yellowstone Wolves
Documented Through Thermal Images

Researchers with the U.S. Geological Survey are using thermal video cameras to study how mange is affecting
wolf with mange

Thermal image of a wolf with mange on its legs.
wolves in Yellowstone National Park, as shown in this video. Mange is a highly contagious skin disease caused by mites that burrow into the skin of dogs and wolves, causing infections, hair loss, irritation, and intense itching. The urge to scratch can be so overwhelming that the wolves neglect resting and hunting, researchers say, leaving them vulnerable to hypothermia, malnutrition, and dehydration, which can eventually lead to death. Thermal imagery allows scientists to document the extent of hair loss and the actual loss of heat associated with different stages of infection. Red patches on a wolf's legs, as shown in this image, indicate rapid heat loss caused by mange.
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10 Feb 2015: Flooding in U.S. Midwest Is
Becoming More Frequent, Research Shows

Flooding in the U.S. Midwest has become more frequent over the last half-century, a new study in Nature Climate Change has
furniture displaced in flooding

Furniture displaced by flooding in Iowa in 2008.
found, confirming what many residents of the region had already suspected. Of the nearly 800 stream sites analyzed, more than one-third had an increase in flood event frequency, while only 9 percent showed a decrease in flooding. Although the study did not attempt to link the increase in flooding with climate change, the findings do fit well with current thinking among scientists about how the hydrologic cycle is being affected by climate change, the researchers say. In general, as the atmosphere becomes warmer, it holds more moisture, and one consequence of higher water vapor concentrations is more frequent, intense precipitation.
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06 Feb 2015: Maine’s Iconic Lobsters
Face Threats From Ocean Acidification

Maine’s lobster fishery, worth $1.7 billion to the state and a vital source of employment, could be

A Maine lobster
threatened by acidifying ocean waters and rising sea temperatures, according to a new report. The report, issued by a state commission, called increasingly acidic ocean waters — caused by the absorption of CO2 from the atmosphere — an “urgent matter” that needs to be addressed by state and local governments and the fishing infustry. Facing the prospect that increasing acidity could interfere with the ability of lobsters to make their shells, the commission set forth a handful of goals, including a stepped-up research effort on the acidification of the coast’s waters and its impact on crustaceans. Maine lawmakers have already introduced legislation for limits on industrial and agricultural runoff, which contribute to coastal water acidification.
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02 Feb 2015: Many California Farms and
Orchards Idled By Drought, NASA Maps Show

In 2014 — the driest year ever recorded in California — farms and orchards in the state's Central Valley took a major hit

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California agriculture status

Status of CA farms in 2011 (left) and 2014 (right).
and many agricultural plots were left fallow, as shown in these maps based on NASA satellite data. The maps depict the status of crop cultivation in California in August 2011 and August 2014. Brown pixels show farms and orchards that have been left fallow, or “idled,” since January 1 in each year. Green pixels show plots where at least one crop was grown during the year. The most recent year with average or above average precipitation across the state was 2011, and, as the map shows, relatively little agricultural land was left fallow that year. In 2014, a much higher proportion of farms and orchards were idle.
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29 Jan 2015: Iceland Rising as Climate Change
Causes Glaciers to Melt, Researchers Say

The crust under Iceland is rebounding as climate change melts the island's great ice caps, researchers report in the

GPS stations measure Iceland crust movement
journal Geophysical Research Letters. The current rapid rising, or uplift, of the Icelandic crust is a result of accelerated melting of the island's glaciers and coincides with a regional warming trend that began roughly 30 years ago, the scientists said. Some areas in south-central Iceland are moving upward as much as 1.4 inches per year — a surprisingly high speed, the researchers say. Whether the rebound is related to past deglaciation or modern glacial thinning and global warming had been an open question until now, said co-author Richard Bennett, a geoscientist at the University of Arizona. "What we're observing is a climatically induced change in the earth's surface," Bennett said.
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26 Jan 2015: Oil Spills Can Lead to Toxic
Arsenic Water Contamination, Study Says

When petroleum breaks down in underground aquifers, toxic arsenic — up to 23 times the current drinking water

Water sampling at the Minnesota oil-spill test site.
standard — can be released into groundwater, according to a study by U.S. Geological Survey and Virginia Tech researchers, who analyzed samples collected over 32 years from a petroleum-spill research site in Minnesota. Arsenic, a toxin and carcinogen linked to numerous forms of cancer, is naturally present in most soils and sediments, but is not typically a health concern because its chemical properties keep it bound within soil and minerals. However, certain chemical reactions associated with petroleum contamination and microbial activity in low-oxygen environments, such as in aquifers, change the chemical state of the arsenic so that it can enter the groundwater, researchers say.
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16 Jan 2015: Solar a Better Investment Than
Stocks in Most Large U.S. Cities, Study Says

For homeowners in 46 of the 50 largest cities in the U.S., investing in a residential solar power system would yield better returns than putting money in the

stock market, according to an analysis by the North Carolina Clean Energy Technology Center at North Carolina State University. For 21 million owners of single-family homes in the U.S., solar energy already costs less than current local utility rates, the report says, as long as the system can be purchased with low-cost financing of 5 percent interest over 25 years. Residents of New York City, Boston, and Albuquerque would likely see the largest benefits from investing in residential solar, the report says. The findings assume, however, that government incentives encouraging solar investments — such as tax exemptions and policies allowing homeowners to sell excess solar power to utility companies — will continue, which is highly dependent on federal, state, and local politics.
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14 Jan 2015: Offshore Wind More Profitable
Than Drilling on U.S. East Coast, Report Says

Offshore wind would produce twice the number of jobs and twice the amount of energy as offshore drilling

Offshore wind turbines in the Irish Sea
near the U.S. East Coast, according to a new report from the advocacy group Oceana. The report contends that recent claims by the oil and gas industry about the economic potential of offshore drilling in the region are exaggerated because many of those oil and gas reserves are not economically viable to drill. Plans to build the nation's first offshore wind farm off Cape Cod have repeatedly failed to move forward. But Oceana calculates that over the course of 20 years, offshore wind in the Atlantic could produce nearly twice as much energy as all of the economically recoverable oil and gas. Offshore wind installations also would likely create an additional 91,000 jobs — twice as many as offshore drilling would create, Oceana says.
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13 Jan 2015: California Still in Widespread
Drought, Despite Heavy Precipitation

The heavy rains and snow that fell across much of California in the first half of December did little to recharge the state's

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California precipitation deficits

California precipitation deficits
dry reservoirs or ease long-term drought conditions, an analysis by the National Oceanic and Atmospheric Administration (NOAA) confirms. By the middle of December, 98 percent of the state remained under drought conditions, which is the same portion as before the storms, according to the U.S. Drought Monitor. Dry conditions over the last three years have left the Sierra Nevada mountain range with a 30- to 50-inch precipitation deficit, NOAA reports, and the agriculture-heavy San Joaquin Valley has fared even worse. To bring the state's four-year precipitation total out of the bottom 20 percent historically — a benchmark used to declare drought conditions — every part of the state would need to exceed its average rainfall between now and September.
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08 Jan 2015: Land Disturbances Darken Snow
And Increase Melt Rate, Researchers Say

Land disturbances, such as agricultural practices and development, may have a big impact on snow purity and

Sampling snowpack in Montana
melt rates, according to a large-scale survey of impurities in North American snow by researchers at the University of Washington. The researchers were particularly interested in the Bakken oil fields of northwest North Dakota. Before undertaking the study, they predicted that diesel emissions and air pollution associated with oil exploration would darken the snowpack, decreasing the amount of sunlight it reflects and increasing its melt rate. They found, however, that while these activities do add soot to the snow, the dirt they stir up adds an equal amount of impurities to the snowpack. Disturbances from clearing oil pads, new housing sites, agricultural activities, and extra truck traffic on unpaved roads add a significant amount of dirt to snowfields, they found.
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07 Jan 2015: Federal Judge Halts Hunting
And Trapping of Great Lakes Gray Wolves

A federal judge has stopped the hunting and trapping of gray wolves in the Upper Midwest,

Gray wolf
following their removal from the U.S. Endangered Species List in 2012 by the Obama administration. In the ruling, which affects gray wolf populations in Minnesota, Wisconsin, and Michigan — the so-called Great Lakes wolf population — the judge called the delisting of the wolves “arbitrary and capricious” and said it violated the Endangered Species Act. The order came roughly three years after federal protections for the wolves were dropped by the U.S. Fish and Wildlife Service. Since then, the states have each held hunting seasons, resulting in 923 gray wolves killed in Minnesota, 654 in Wisconsin, and 22 in Michigan for a total of 1,599 killed. Researchers estimate that roughly 3,700 gray wolves live in the Great Lakes region.
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05 Jan 2015: U.S. Cities Are Significantly
Brighter than German Cities, Scientists Say

German cities emit several times less light per capita than similarly sized American cities, according to new research published in the journal Remote Sensing.

Berlin, Germany, at night
Moreover, the differences in light emission become more dramatic as city size increases: Light per capita increases with city size in the U.S. but decreases in Germany. Factors such as the type of lamps used and architectural elements like the width of the streets and the amount of trees are likely behind the differences, the researchers say. Energy-efficient LED street lighting is currently being installed in many cities worldwide, and the researchers expect this to change the nighttime environment in many ways — for example, by reducing the amount of light that shines upward. The study also found that, in major cities in developing countries, the brightest light sources were typically airports or harbors, whereas the brightest areas in large European cities are often stadiums and city centers.
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02 Jan 2015: Historical Photos Help
Document Changes in Greenland Glaciers

Historical photographs from the early and mid-1900s have helped researchers from Denmark map the retreat

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Photo of a Greenland glacier from 1935
of Greenland's glaciers, according to findings presented recently at the American Geophysical Union meeting. This glacier near the Sukkertoppen ice cap in southwest Greenland, for example, retreated roughly two miles between 1935 and 2013, as shown in photographs from the Danish Geodata Agency and the Natural History Museum of Denmark. Older photographs, from 1900 to 1930, show even more remarkable changes. During that time, following the end of the Little Ice Age in the late-19th century, glaciers retreated more rapidly than they have been in recent years, the researchers say. They believe the findings will shed light on how quickly these glaciers might react to future temperature changes.
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A Green Dilemma for the Holidays:
Better to Shop Online or In-Store?


Various studies in recent years have suggested that online shopping typically packs a lower carbon punch than shopping at brick-and-mortar stores. But new research suggests the story is more complicated than that. The key, according to a report in the Journal of Cleaner Production, is to minimize the number of miles driven per item — whether by the shopper, a local delivery van, or a FedEx truck.
Read more.
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19 Dec 2014: 'Nuisance Flooding' Will Affect
Most of U.S. Coastline by 2050, Report Finds

By 2050, most U.S. coastal areas are likely to be threatened by 30 or more days of flooding each year due sea level

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Nuisance flooding projections for U.S. cities
rise, according to a new report the National Oceanic and Atmospheric Administration (NOAA). The researchers looked at the frequency of so-called "nuisance flooding," which occurs when the water level reaches one to two feet above local high tide, and found that several cities along the East Coast are already seeing more than 30 days of nuisance flooding each year. Additional major cities — including Baltimore, Atlantic City, Philadelphia, and San Francisco — will reach or exceed that benchmark by 2030, the report says. Although nuisance flooding is not typically catastrophic or dangerous, it is often costly. The report drives home the point, researchers say, that such floods will become commonplace far earlier than 2100, which is generally cited as the date when sea level rise is likely to become damaging.
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17 Dec 2014: Obama Protects Alaska's
Bristol Bay From Oil and Gas Development

President Obama yesterday announced protections for Bristol Bay, Alaska, one

A grizzly bear catches a salmon in Bristol Bay.
of the most productive fishing grounds in the nation, from future oil and gas development. The president's action is expected to benefit commercial fishermen and Native Alaskans and boost conservation efforts in the region, which is roughly the size of Florida. Noting that Bristol Bay is the world's largest sockeye salmon fishery and the source of 40 percent of U.S. wild-caught seafood — a catch worth $2 billion annually — Obama vowed to ensure long-term safeguards for the bay. The region has been under protection intermittently since 1989, when the Exxon Valdez spill prompted a federal moratorium on offshore drilling. "It is a natural wonder, and it’s something that’s just too precious to be putting out to the highest bidder," Obama said in a video message. The federal government is still considering whether to allow development of what would be North America's largest open-pit mine in the bay's watershed.
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16 Dec 2014: Falling Gasoline Prices Have
Little Effect on Car Travel, Analysis Shows

Although the average retail price of gasoline in the U.S. has fallen 28 percent from its peak in June 2014,

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Gas prices vs. miles driven
the decline may not have much effect on automobile travel and gasoline consumption, according to an analysis by the U.S. Energy Information Administration (E.I.A.). Typically, an increase in the price of a product leads to lower demand, and vice versa — a concept known as price elasticity. Air travel, for example, tends to be highly elastic: A 10-percent increase in the price of air fares leads to an even greater decrease in air travel. Automobile travel tends to be much less elastic, however. According to E.I.A. data, it takes a 25- to 50-percent decrease in the price of gasoline to increase automobile travel by just 1 percent. One reason for this is that the distance people drive to work and for daily errands is relatively fixed, analysts say. Increased vehicle fuel economy also balances out increases in miles traveled, leading to more stability in gasoline consumption.
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12 Dec 2014: Majority of Americans Support
Climate Actions and Negotiations, Poll Says

Most Americans want the United States to be a world leader in combating global warming and to be participating in international climate negotiations, according to a poll by the Associated Press-NORC Center for Public Affairs Research and the Yale School of Forestry & Environmental Studies. Sixty-one percent of Americans think the U.S. should lead other nations on climate change, even if it means taking action when other countries do not. A majority of both Democrats and Republicans support some specific policies intended to curb greenhouse gas emissions in the U.S., the poll found, such as funding research for clean energy and regulating CO2 emissions. Less than 20 percent of people polled think such protections would harm the economy long-term, while 60 percent say they would improve economic growth and provide jobs.
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05 Dec 2014: U.S. Natural Gas Fracking Boom
May Be Shorter Than Predicted, Study Says

Estimates of the amount of natural gas that can be extracted from U.S. reserves is much too high and the boom may last just half as long as predicted, says a new report in the journal Nature. Official government estimates by the Energy Information Administration (EIA) suggest that peak natural gas production, driven by the rapid growth of hydraulic fracturing, will likely last until 2040 before tapering off. The new analysis suggests that that estimate is too high. Instead, researchers say, the peak will likely come in 2020, and after that production will fall off dramatically. The findings are based on higher-resolution, finer-scale estimates of oil and gas reserves — in units of a single square mile — compared to the EIA's method, which lumps together all land within a single county. The EIA's method also fails to account for the realities of economics, the reseachers say: Fracking companies tend to look for "sweet spots," which they quickly abandon as soon as the reserves become depleted and extraction costs rise.
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01 Dec 2014: Politics, Not Extreme Weather,
Shape Climate Perceptions, Study Finds

Climate extremes such as droughts and record temperatures are failing to change people’s minds about global warming, according to a recent study led by Michigan State University sociologists. Instead, political orientation is the most influential factor in shaping perceptions about climate change, both in the short-term and long-term, the researchers found. Some previous studies suggested temperature patterns do influence perceptions about global warming, but none measured climatic conditions as comprehensively as the current research. The study analyzed 50 years of regional climate data and climatic storm-severity measures used by the National Oceanic and Atmospheric Administration from all 50 states, along with 11 years of public opinion data from Gallup polls on climate change perceptions. Although advocates of climate change reduction efforts hope that experience with a changing climate will eventually convince the public of the reality and seriousness of the problem, the current findings do not bode well for that scenario, the researchers say.
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21 Nov 2014: U.S. Can Cut Greenhouse Gas Emissions 80 Percent by 2050, Study Says

The United States can reduce greenhouse gas emissions by 80 percent by 2050, using existing or near-commercial technologies, according to researchers with the Deep Decarbonization Pathways Project. The study analyzed scenarios with four types of decarbonized electricity: renewable energy, nuclear energy, fossil fuel with carbon capture and storage, and a mixed case. The scenarios achieved reductions of 83 percent below 2005 levels and 80 percent below 1990 levels, according to the study, which was released ahead of next month’s climate talks in Lima, Peru, and negotiations in Paris in December 2015. The energy efficiency of buildings, transportation, and industry would need to increase through the use of smart materials and energy-efficient designs, and vehicles will need to be fueled with electricity generated from wind, solar, or nuclear, as opposed to coal, the researchers said. They project the net costs would be on the order of 1 percent of gross domestic product per year. The 80-percent reduction by 2050 is a long-standing goal of the Obama administration, in line with global commitments to limit warming to less than 2 degrees C.
PERMALINK

 

20 Nov 2014: Real-Time Ocean Acidification
Data Now Available for U.S. Pacific Coast

Researchers, coastal managers, and shellfish farmers along the U.S. Pacific coast can now get real-time ocean

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Web portal for ocean acidification data
acidification data through an online tool developed by the National Oceanic and Atmospheric Administration (NOAA). The data — which includes measurements of pH, carbon dioxide concentrations, salinity, and water temperatures at various sites — should help organizations and businesses make decisions about managing coastal resources and craft adaptation strategies, NOAA researchers say. The tool will feature data from five shellfish hatchery sites along the Pacific coast along with readings from NOAA’s ocean acidification monitoring sites. Ocean acidification is driven primarily by absorption of atmospheric CO2 by ocean waters, which changes seawater chemistry in a way that makes it difficult for many marine organisms to form their shells.
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28 Oct 2014: Scientists Find Seafloor Fallout Plume of Oil from Deepwater Horizon Spill

Researchers say they have found a large fallout plume of oil on the seafloor from the 2010 Deepwater Horizon

Deepwater Horizon oil at the surface of the ocean
disaster in the Gulf of Mexico. According to a report in the Proceedings of the National Academy of Sciences, a portion of the 2 million barrels of oil thought to be trapped in the deep sea after the spill appears to have settled across a 1,250-square-mile patch of the seafloor centered around the Macondo Well, which discharged an estimated 5 million barrels of oil in the nearly three months between its blowout in April and eventual capping in July. The oil is concentrated in the top half-inch of the seafloor, and mostly distributed in patchy deposits to the southwest of the well, the study found. These deposits account for between 4 and 31 percent of the Macondo oil sequestered in the deep ocean, researchers estimate. The rest has likely been deposited outside this area, they say, but has evaded detection so far because of its patchiness.
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24 Oct 2014: New Mapping Tool Shows U.S. Geothermal Plants and Heat Potential

A new mapping tool from the U.S. Department of Energy lets users see how geothermal power plants

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Geothermal power plants and heat flow potential
across the country are taking advantage of the heat stored within the earth’s crust. Most of the nation’s 154 operational and planned geothermal plants are clustered in western states, where geothermal heat potential is especially high (red areas). Notably, the map identifies two areas that appear ripe for new geothermal development: one in the Great Plains and another at the border of Virginia and West Virginia. The bulk of the facilities are conventional geothermal plants, which generate power using fluid found naturally deep below earth's surface. Steam captured at the surface spins a turbine, which then powers an electric generator. A newer type of technology, called enhanced geothermal, forces cold water from the surface down into the hot crust. Both types are generally considered clean sources of energy.
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