Category Archives: Environment

Nitrogen Pollution Changing Rocky Mountain National Park Vegetation, Says CU-Boulder Study

By Guest PostJuly 8, 2012Environmentacidified soils, agriculture, alpine meadow, alpine vegetation, Arctic, atmospheric nitrogen pollution, automobiles, biodiversity, boulder, chapin pass, colorado, denver area, ellen porter, front range, isabel ashton, john murgel, mummy range, national park, nitrogen deposition, nitrogen emission, nitrogen pollution, niwot ridge, power plants, rocky mountain, soil acidification, stream organism, tamara blett, trout, university of colorado, vascular plant, vegetation, william bowman

A new study led by the University of Colorado Boulder indicates air pollution in the form of nitrogen compounds emanating from power plants, automobiles and agriculture is changing the alpine vegetation in Rocky Mountain National Park.

The emissions of nitrogen compounds to the atmosphere are being carried to remote areas of the park, altering sensitive ecosystems, said CU-Boulder Professor William Bowman, who directs CU-Boulder’s Mountain Research Station west of Boulder and who led the study. “The changes are subtle, but important,” he said. “They represent a first step in a series of changes which may be relatively irreversible.”

In other regions of the world, higher amounts of nitrogen pollutants correlate with decreased biodiversity, acidified soils and dead stream organisms like trout, said Bowman. “There is evidence that indicates once these changes occur, they can be difficult if not impossible to reverse. It is best to recognize these early stages before the more harmful later stages happen.” (more…)

Scientists Discover New Trigger for Immense North Atlantic Ocean Spring Plankton Bloom

By Guest PostJuly 7, 2012Environmentadam huxtable, amala mahadevan, atlantic ocean, biological pump, bjarni saemundsson, carbon dioxide, climate, climate on earth, CO2, craig lee, diatoms, don rice, eddies, emily kallin, eric d asaro, fossil fuel, global carbon cycle, holiday fireworks, mary jane perry, michael ohmart, microscopic plants, modulate, north atlantic bloom, not sunlight, nsf, ocean physics, oceanic cycling, oxygen, photosynthesis, physical biological model, phytoplankton, research vessel, silica, sun, surface warming, university of maine, university of washington, us beachgoers, whirlpools, whoi, zooplankton

Ocean eddies help jump-start plankton blooms that spread across hundreds of square miles

On this July 4^th week, U.S. beachgoers are thronging their way to seaside resorts and parks to celebrate with holiday fireworks. But across the horizon and miles out to sea toward the north, the Atlantic Ocean’s own spring and summer ritual unfolds. It entails the blooming of countless microscopic plants, or phytoplankton.

In what’s known as the North Atlantic Bloom, an immense number of phytoplankton burst into existence, first “greening,” then “whitening” the sea as one or more species take the place of others.

What turns on this huge bloom, what starts these ocean fireworks? Is it the Sun’s warmth? (more…)

NASA Scientist: Climate Just One Factor in Wildfires

By Guest PostJuly 4, 2012Environment2002 hayman fire, ash creek fire, bill patzert, climate, climate change, colorado, factor, fiery summer, forests, grasslands, horse creek fire, jpl climatologist, la niña, los angeles county, misr, nasa scientist, new mexico, southeastern montana, southern california, united states, us wildfire season, wildfire

It’s shaping up to be a fiery summer across the United States. According to the National Interagency Fire Center, as of July 3, 45 large active wildfires are currently burning in 15 states. Combined, these fires have scorched nearly three-quarters of a million acres. Since January 1, wildfires have burned nearly 2.2 million acres across the country, including devastating blazes in Colorado and New Mexico. We asked JPL Climatologist Bill Patzert to discuss the recent wildfire outbreak and whether climate change is playing a role.

Q: The U.S. wildfire season is off to an active start. What factors have contributed to the recent rash of blazes?

Patzert: Across the West, out-of-control wildfires this summer have left a heartbreaking path of destruction. The primary condition that triggered these fires was an unusually dry and warm La Nina winter and spring. These conditions primed the Western U.S. for an incendiary summer. The arrival of a persistent, scorching high-pressure system over the Western and Central U.S. just exacerbated already dangerous conditions, which reached a tipping point when strong, gusty winds sent these fires rampaging across the landscape. From New Mexico to Colorado and many other states, out-of-control wildfires are still burning through forests, grasslands and destroying neighborhoods. (more…)

Weevils and Weeds

By Guest PostJuly 3, 2012Environmentamanda stout, chester county, China, coverdale farm preserve, creek state park, dave pro, delaware, doug tallamy, judy hough goldstein, margo mcdonough, mile a minute, pea patch island, photosynthesize, rhinoncomimus latipes, shrubs, weed, weeds, weevil, weevils, white clay, yard

UD researchers use weevils to check spread of prolific mile-a-minute weed

Mile-a-minute weed has declared war on Doug Tallamy’s yard. This non-native, invasive vine is growing up his trees, scrambling over shrubs and smothering tree seedlings. By blocking sunlight, it weakens a plant by reducing its ability to photosynthesize.

Mile-a-minute doesn’t care one whit that Tallamy, professor and chair of the University of Delaware’s Department of Entomology and Wildlife Ecology, is a highly respected proponent of native gardening who doesn’t believe in planting any non-natives, let alone a highly invasive non-native.

“The deer brought mile-a-minute from our neighbor’s yard three years after we moved in,” says Tallamy. “We had just a few plants the first year, a few hundred the second year, and 20 trillion the third year.” (more…)

Despite Efforts for Change, Bangladeshi Women Prefer to Use Pollution-Causing Cookstoves

By Guest PostJuly 2, 2012Environment, Generalanimal dung, bangladeshi district, bangladeshi household, bangladeshi women, biomass, black carbon, cooking, cookstove, environmental impact, flooding, greenhouse gas, hatiya, health risk, jamlpur, mushfiq mobarak, pollution causing, puneet dwivedi, robert bailis, rural bangladesh, traditional stove, women, yale study, yale university

Women in rural Bangladesh prefer inexpensive, traditional stoves for cooking over modern ones — despite significant health risks, according to a Yale study in the Proceedings of the National Academy of Sciences.

A large majority of respondents (94%) believed that indoor smoke from the traditional stoves is harmful. Still, Bangladeshi women opted for traditional cookstove technology so they could afford basic needs.

“Non-traditional cookstoves might be more successful if they were designed with features valued more highly by users, such as reducing operating costs even if they might not reduce environmental impact,” said Mushfiq Mobarak, a co-author and associate professor of economics at the Yale School of Management. (more…)

Melting Sea Ice Threatens Emperor Penguins, Study Finds

By Guest PostJuly 1, 2012Environment, Natureantarctic peninsula, antarctic sea ice, Antarctica, christophe barbraud, climate models, climate variable, demographic model, dion islets, east antarctica, emperor penguins, food web, global temperature, happy feet, henri weimerskirch, ipev, krill, life cycle, marika holland, mark serreze, melting sea ice, nutrient cycle, organism, penguin colony, penguin population, sea bird, sea ice forecasts, shrimplike animal, squid, stephanie jenouvrier, terre adelie, warming temperature, whoi

At nearly four feet tall, the Emperor penguin is Antarctica’s largest sea bird—and thanks to films like “March of the Penguins” and “Happy Feet,” it’s also one of the continent’s most iconic. If global temperatures continue to rise, however, the Emperor penguins in Terre Adélie, in East Antarctica may eventually disappear, according to a new study by led by researchers from the Woods Hole Oceanographic Institution (WHOI). The study was published in the June 20th edition of the journal Global Change Biology.

“Over the last century, we have already observed the disappearance of the Dion Islets penguin colony, close to the West Antarctic Peninsula,” says Stephanie Jenouvrier, WHOI biologist and lead author of the new study. “In 1948 and the 1970s, scientists recorded more than 150 breeding pairs there. By 1999, the population was down to just 20 pairs, and in 2009, it had vanished entirely.” Like in Terre Adélie, Jenouvrier thinks the decline of those penguins might be connected to a simultaneous decline in Antarctic sea ice due to warming temperatures in the region. (more…)

UW Deploying Seismic Sensors in Hope of Getting to Bottom of Spokane Quakes

By Guest PostJune 29, 2012Environmentautomated earthquake, bill steele, cascades, detector, douglas gibbons, echoes, fault, geological structure, internet access, mild earthquake, motion sensor, netquakes, ocean shores, oregon, project, puget sound region, seismic network, seismometer, spokane, spokane area, university of washington, Washington, yakima

It’s been a decade since a swarm of relatively mild earthquakes shook up parts of Spokane. Now, armed with the right tools, scientists want to find out what was at fault.

“It was always something not as well understood as we thought it should be,” said Douglas Gibbons, a University of Washington researcher in Earth and space sciences, who is guiding installation of strong-motion sensors as part of a project called NetQuakes.

NetQuakes will install a half-dozen seismometers in the Spokane area by the end of June, mostly in volunteers’ homes, to help improve understanding of what lies beneath the city. (more…)

UMD-Led Research Yields Key to Better Predictions of El Nino

By Guest PostJune 28, 2012Environmentcyclical climate event, economic impacts, el niño

COLLEGE PARK, Md. –– A University of Maryland scientist and an undergraduate Indian student he mentored in India have uncovered a major new finding about El Nino — the cyclical climate event that appears every 2-7 years, sometimes with major global weather impacts such as massive flooding in some regions and severe droughts in others and resulting major economic impacts. (more…)