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Science News for March 9, 2000


Do US ecosystems balance US fossil fuel use?

Researchers modeled US ecosystem carbon budget using state-of-the-art data and models, finding small uptake of carbon despite high emissions. The results suggest that ecosystems in the US store carbon, but not enough to balance fossil fuel use, making other regions important for climate change mitigation.

SourceMax-Planck-Gesellschaft·JournalScience·DateMar 9, 2000

Air pollution can prevent rainfall, reported in the 10 March 2000 issue ofScience

A recent study published in Science reveals that urban and industrial air pollution can suppress rainfall and snowfall by creating clouds with abnormally small water droplets. This phenomenon occurs when pollution particles act as 'seeding' sites, preventing cloud moisture from condensing into raindrops and ice crystals.

Colorado State and international scientists say loss in biodiversity by year 2100 could be consequence of global changes

A study led by Colorado State University scientists reveals that human-caused global changes, such as land-use change and nitrogen deposition, are expected to drive biodiversity loss between now and 2100. The research identifies five primary drivers of global change and assesses their impact on terrestrial and freshwater ecosystems.

SourceColorado State University·JournalScience·DateMar 9, 2000

Simple change in mechanical ventilator cuts deaths by more than 20 percent

A nationwide clinical trial found that reducing tidal volumes in mechanical ventilation can cut mortality from Acute Respiratory Distress Syndrome (ARDS) by up to 22%. The study, involving 861 patients and coordinated at Massachusetts General Hospital, used a new technique with smaller oxygen puffs to provide breathing assistance.

SourceUniversity of California - San Francisco·JournalNew England Journal of Medicine·DateMar 9, 2000