Earth

Alexandria, VA – The American Geological Institute (AGI) Workforce Program has released the second chapter, entitled Trends in Geoscience Education at Four Year Institutions, of the Status of the Geoscience Workforce report. Chapters 1 and 2 of this report are now available through the AGI website at http://www.agiweb.org/workforce/.

Coastal erosion has more than doubled in Alaska – up to 45 feet per year – in a 5-year period between 2002 and 2007 along a 40-mile stretch of the Beaufort Sea.

Globally, tropical trees in undisturbed forest are absorbing nearly a fifth of the CO2 released by burning fossil fuels.

The researchers show that remaining tropical forests remove a massive 4.8 billion tonnes of CO2 emissions from the atmosphere each year. This includes a previously unknown carbon sink in Africa, mopping up 1.2 billion tonnes of CO2 each year.

Skyrocketing coastal erosion occurred in Alaska between 2002 and 2007 along a 64 kilometer (40 mile) stretch of the Beaufort Sea, a new study finds. The surge of erosion in recent years, averaging more than double historical rates, is threatening coastal towns and destroying Alaskan cultural relics.

Aerosols may have a greater impact on patterns of Australian rainfall and future climate change than previously thought, according to leading atmospheric scientist, CSIRO's Dr Leon Rotstayn.

"We have identified that the extensive pollution haze emanating from Asia may be re-shaping rainfall patterns in northern Australia but we wonder what impact natural and human-generated aerosols are having across the rest of the country," Dr Rotstayn said.

A unique study by a scientist at Scripps Institution of Oceanography at UC San Diego has provided fresh evidence of fishing's impact on marine ecosystems. Scripps Oceanography graduate student researcher Loren McClenachan accessed archival photographs spanning more than five decades to analyze and calculate a drastic decline of so-called "trophy fish" caught around coral reefs surrounding Key West, Florida.

SEOUL, KOREA—The toxic gas formaldehyde is contained in building materials including carpeting, curtains, plywood, and adhesives. As it is emitted from these sources, it deteriorates the air quality, which can lead to "multiple chemical sensitivity" and "sick building syndrome", medical conditions with symptoms such as allergies, asthma, and headaches. The prevalence of formaldehyde and other volatile organic compounds (VOC) is greater in new construction.

TUCSON, AZ—Capillary mats are popular in the retail nursery industry and with many home gardeners. The uniquely designed mats provide automated irrigation to a variety of plants, conserve water, and reduce the need for labor-intensive hand-watering.

Made with absorbent fabric lined with polyethylene film on the bottom and covered on top with perforated polyethylene or similar material, the mats help minimize evaporation while allowing water to move from the bottom of the mat up into the containers on top.

MADISON, WI, February 16, 2009 -- Grasslands in the Conservation Reserve Program (CRP) in the United States may be increasingly converted to growing bioenergy grain crops. Questions abound regarding the fate of carbon sequestered in the soil during the CRP program by perennial grasses if the land is converted to grain crop production and the potential effectiveness of no-till production systems to conserve the sequestered soil organic carbon (SOC).

15.02.2009 | Potsdam: In the current issue of the Scientific Journal Nature Geoscience a group of Norwegian, Swiss and German geoscientists prove that before the set-in of the Holocene very rapid climate changes already existed. The transition from the stable cold period took place about 12 150 to 11 700 years ago with very rapid fluctations up to the temperatur-threshold at which the Holocene began.

The Greenland and Antarctica ice sheets are melting, but the amounts that will melt and the time it will take are still unknown, according to Richard Alley, Evan Pugh professor of geosciences, Penn State.

Based on a detailed analysis of ocean vertical temperature profiles for the 1955-2008 period, Sydney Levitus, lead author, talks about the change of global average sea level induced by the observed warming of the world ocean during the past 53 years. The warming of the world ocean is consistent with the amount of warming expected as a result of the observed increase in greenhouse gases in earth's atmosphere.

If you're looking for bargain air travel, a new study finds that you should look at more than just the ticket price. Instead, a researcher at North Carolina State University who co-authored the study says that consumers need to consider the quality of the flights being offered in order to get the best "price efficiency."

CHICAGO---The global travel logs of greenhouse gases are based on atmospheric sampling locations sprinkled over the Earth and short towers that measure the uptake or release of carbon from a small patch of forest. But those measurements don't agree with current computer models of how plants and soils behave.

A University of Michigan researcher is developing a unique way to reconcile these crucial data.

If you are a fish eater, it's likely that the salmon you had for dinner was not caught in the wild, but was instead grown in a mesh cage submerged in the open water of oceans or bays. Fish farming, a relatively inexpensive way to provide cheap protein to a growing world population, now supplies, by some estimates, 30 percent of the fish consumed by humans.

Two hundred and twenty species of finfish and shellfish are now grown in farms.