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The effects of Global warming on fisheries assessed in new study
A report to be published Thursday in the journal Nature suggests that global warming may increase upwelling in several ocean current systems around the world by the end of this century, especially at high latitudes, and will cause major changes in marine biodiversity.Since upwelling of colder, nutrient-rich water is a driving force behind marine productivity,…
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Nitrous Oxide emissions and Ice Ages
Nitrous oxide (N2O) is an important greenhouse gas that doesn’t receive as much notoriety as carbon dioxide or methane, but a new study confirms that atmospheric levels of N2O rose significantly as the Earth came out of the last ice age and addresses the cause.An international team of scientists analyzed air extracted from bubbles enclosed…
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CO2 pulses and the last Ice Age
A new study shows that the rise of atmospheric carbon dioxide that contributed to the end of the last ice age more than 10,000 years ago did not occur gradually, but was characterized by three “pulses” in which C02 rose abruptly.Scientists are not sure what caused these abrupt increases, during which C02 levels rose about 10-15 parts…
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Methane sink discovered in oceanic rock
Since the first undersea methane seep was discovered 30 years ago, scientists have meticulously analyzed and measured how microbes in the seafloor sediments consume the greenhouse gas methane as part of understanding how the Earth works. The sediment-based microbes form an important methane “sink,” preventing much of the chemical from reaching the atmosphere and contributing…
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What happens to a river when a dam is removed?
A study of the removal of two dams in Oregon suggests that rivers can return surprisingly fast to a condition close to their natural state, both physically and biologically, and that the biological recovery might outpace the physical recovery. The analysis, published by researchers from Oregon State University in the journal PLOS One, examined portions…
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‘Transponders’ from Japan was ashore along US West Coast
Northwest anglers venturing out into the Pacific Ocean in pursuit of salmon and other fish this fall may scoop up something unusual into their nets – instruments released from Japan called “transponders.” These floating instruments are about the size of a 2-liter soda bottle and were set in the ocean from different ports off Japan…
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If Hops aid cognitive function in mice, maybe beer will do it in humans
Xanthohumol, a type of flavonoid found in hops and beer, has been shown in a new study to improve cognitive function in young mice, but not in older animals. The research was just published in Behavioral Brain Research by scientists from the Linus Pauling Institute and College of Veterinary Medicine at Oregon State University. It’s…
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Water quality alerts do not seem to deter some surfers
Nearly three in 10 surfers admit they knowingly surf during health advisories – nearly the same amount that chooses not to surf during periods of elevated bacteria. About 40 percent of surfers said they were unaware if they had ever surfed during an active health advisory. The data can help public officials better warn surfers…
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Lyme disease is older than the human race
Lyme disease is a stealthy, often misdiagnosed disease that was only recognized about 40 years ago, but new discoveries of ticks fossilized in amber show that the bacteria which cause it may have been lurking around for 15 million years – long before any humans walked on Earth. The findings were made by researchers from…
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New insight on Antarctic Ice Sheet behavior at end of the last ice age
A new study has found that the Antarctic Ice Sheet began melting about 5,000 years earlier than previously thought coming out of the last ice age – and that shrinkage of the vast ice sheet accelerated during eight distinct episodes, causing rapid sea level rise. The international study, funded in part by the National Science…