Posted on January 5, 2015 by Bob Berwyn
The word’s tropical rainforests, shown in green, are more important carbon sinks than previously thought.
Carbon uptake in northern forests slows
FRISCO — Tropical forests are even more important carbon sinks than previously believed, according to a new study led by NASA and the National Center for Atmospheric Research.
The study estimates that tropical forests absorb 1.4 billion metric tons of carbon dioxide out of a total global absorption of 2.5 billion, in response to rising atmospheric levels of the greenhouse gas. Continue reading
Filed under: climate and weather, climate change, Environment, forests, global warming | Tagged: climate change, carbon cycle, CO2, tropical forests | Leave a comment »
Posted on November 11, 2014 by Bob Berwyn
During the northern hemisphere winter, the Bering Sea, dividing Alaska and Siberia, becomes the most acidic region on earth (in purple) as shown in this February 2005 acidity map in pH scale. Temperate oceans are less acidic. The equatorial Pacific is left blank due to its high variability around El Niño and La Niña events. Map courtesy Taro Takahashi.
New benchmark data will help track future changes
FRISCO — The world’s oceans are acidifying at a rate of about 5 percent each decade, a trend that could cost the global economy $3 trillion a year in lost revenue from fishing, tourism and other intangible lost ecosystem services.
At that pace, warm-water corals by the end of the century could be living in waters 25 percent more acidic than they are today, raising questions about the long-term survival of coral reef ecosystems.
To paint a more detailed picture of potential impacts, scientists have created an ocean acidification map, showing how how acidity levels vary across the world’s oceans. The data should help provide a benchmark for the future, as enormous amounts CO2 from fossil fuels ends up in the sea. Continue reading
Filed under: biodiversity, coral reefs, Environment, Marine biology, ocean conservation | Tagged: climate change, CO2, Environment, global warming, greenhouse gases, ocean acidification | Leave a comment »
Posted on November 10, 2014 by Bob Berwyn
A new study projects a big spike in pollen production as atmospheric CO2 concentrations increase.
‘The implications of increasing CO2 for human health are clear’
FRISCO — Those sniffly, sneezy summer days are about to get a lot worse for allergy sufferers. Some types of grass pollen and exposure to allergens could increase by more than 200 percent in the next 100 years, due to predicted rises in carbon dioxide and ozone, according to University of Massachusetts Amherst scientists, who project a significant, worldwide impact on human health.
In their study of Timothy grass, environmental health researchers tried to determinedthe interactive effects of CO2 and ozone at projected higher levels on pollen production and concentrations of a Timothy grass pollen protein that is a major human allergen. The findings are reported in the current issue of PLOS ONE. Continue reading
Filed under: air quality, climate and weather, Environment, global warming | Tagged: allergies, carbon dioxide, climate change, CO2, pollen | 1 Comment »
Posted on September 17, 2014 by Bob Berwyn
Coral growth is slowing dramatically along parts of the Great Barrier Reef. Photo courtesy NOAA.
Will the world’s coral reefs simply dissolve as oceans become more acidic?
FRISCO — Scientists monitoring the Great Barrier Reef said they’ve tracked a “perilous” 40 percent slowdown in coral growth rates since the 1970s.
The trend may be linked with increasing ocean acidification, according to the new study led by researchers with the Carnegie Institution for Science.
The researchers compared current measurements of the growth rate of a section of Australia’s Great Barrier Reef with similar measurements taken more than 30 years ago. Continue reading
Filed under: biodiversity, climate and weather, coral reefs, Environment, global warming, ocean acidification | Tagged: carbon dioxide, climate change, CO2, coral reefs, greenhouse gases, ocean acidification | 1 Comment »
Posted on June 9, 2014 by Bob Berwyn
Study finds that online movie viewing is more energy efficient
FRISCO —All those trips to the video store and Red Box, and all the fossil fuel used to manufacture and transport DVDs and CDs added up to more than 4 billion pounds of carbon dioxide emissions that could have been avoided (in 2011) if all media were simply streamed online, scientists concluded after taking a close look at the carbon budget of the entertainment business.
The study, published May 29 in the journal Environmental Research Letters, says more energy efficient electronic devices have tipped the balance toward online consumption of movies and music. A significant proportion of the energy consumption and carbon emissions for streaming comes from the transmission of data, which increases drastically when more complex, high-definition content is streamed. Continue reading
Filed under: climate and weather, extreme weather, global warming | Tagged: carbon dioxide, clmate change, CO2, Environment | Leave a comment »
Posted on March 30, 2014 by Bob Berwyn
Atmospheric CO2 concentrations are spiking higher and earlier each year, according to NOAA.
Up, up and away …
FRISCO — Atmospheric carbon dioxide levels are spiking earlier each year, scientists said last week, announcing that concentrations reached the 400 parts per million “milestone” two months earlier than last year.
CO2 levels peak each year in the spring as the Earth breathes in a great seasonal cycle. This year’s early 400 ppm reading is another clear sign that the heat-trapping gas is building up at an ever-increasing rate, according to data from the National Oceanic and Atmospheric Administration’s Mauna Loa Observatory in Hawaii.
Filed under: climate and weather, Environment, global warming | Tagged: CO2, global warming, Mauna Loa | Leave a comment »