Tag: "winds" at biology news

Ocean Sediments Contain Record of Past Vegetation Fires in Africa

...Charcoal may then be transported long distances by winds and rivers to coastal and ocean environments, wher...g from active fires, and transported by prevailing winds from the source area to the ocean within days to weeks of its initial formation. It eventually sink...

Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'

... must land upon temporary clearingscreated by high winds and subsequent fires. They must then compete for s...seed clusters that look like parasols. As treetop winds blow, individual wing-shaped seeds can then detach andflutter to the ground "like little helicopters...

New understanding of crab populations may not bring fishermen's delight

...ringthe spring upwelling in the ocean current when winds come from the north. "This model says the population would be constant if it wasn't constantlyperturbed by environmental changes from year to year," Botsford says."It points us toward the environmental influences but doesn't identifythem. More resea...

New Mathematical Model Could Help Predict Health Of Offshore Areas Where Rivers Enter The Sea

....The model, which shows the dramatic importance of winds to the health of theseecosystems,could be useful in preventing the destruction of such areas as rich fishingbanks. "The key is learning how to identify, quantify and qualify which processesare at work inan ecosystem," said Dr. Changsheng Chen, a...

Remote Cloud Observatory Tracks El Niño Changes

...ldwide events. Normally the Pacific trade winds blow from east to west and push warmwater across t...ca. When El Niño begins, the trade winds slacken and the water stays put.The west coast water becomes 3 to 5 degrees Celsius warmer than usua...

Corn Rootworm Changing Behavior, Posing New Threat To Crops

...antic coast. "Given what we know about prevailing winds andstorm patterns, it's only a matter of time before this rootworm adaptionends up as far east as Delaware," said Scott Isard, a U. of I. geographyprofessor. Given the amount of first-year corn acreage in Illinois, it would costfarmers $100 million ...

USGS Cautions Proper Use Of Pepper Spray To Avoid Bear Attacks

...ars showed no response to thetreated soils, strong winds were observed that may have "whisked the scentdirectly away from the bears, calling into question whether they could havescented the spray at all." Other unusual brown bear behavior Smith recorded on the sprayed sitesincluded numerous i...

As A 'Carbon Sponge,' Iron-Poor Coastal Waters Can't Always Do The Job, NaturePaper Shows

...hecontinents, deserts also expand, allowing strong winds blow iron-rich dustacross the planet. Estimates of the ocean's productivity during ice ages andinterglacial periods-such as the current era-may need to be reevaluated, henotes, because some models are based in part on samples of opal pulled fromdeep-...

Allergy And Asthma-Exaceberating Mites, Molds And Pollens On The Rise Due To El Niño . . . La Niña

...s. La Niña is a weather pattern of hot, dry winds which follows El Niño.While El Niño'...Niña pattern moves into place, the hot, dry winds kick up the pollens onceagain, renewing allergy and asthma attacks. "This year, conditions in South...

Study 'Gone With The Wind' Provides Stellar Ecological Example

...r the role of natural disturbances -- flood, fire, winds -- in structuringecosystems. The question is: do they play a major, or transient role? The results of the Spiller, Losos, Schoener study lean toward aconclusion that rare catastrophic events may plan an important role and have along-lasti...

NCAR Team Tags 'Imported' Pollutants Over The Pacific Northwest

...ansport by the earth's winds," Kiehl explains. But winds are not thewhole story. For the past three years, Kiehl and colleagues Mary Barth,Philip Rasch, and Timothy Schneider have been developing an integratedmodel of climate and sulfur chemistry. The model includes the emissionof natural and industrial su...

If You Can't Stop Polluting, Try Changing The Weather Instead

...a clear change in theintensity or direction of any winds produced by the antenna. "Preliminaryresults are insufficient," he says. More recent results, presented by Bisiacchiand Pokhmelnykh on 15 January, are still being analysed....

Go For The Burn

...e air pollutantswere quickly dispersed by the high winds associated with the storm and the rapidrise of the hot emissions." A photo gallery of the burn is available on TheOregonian web site at http://www.oregonlive.com/special/gallery/ship/...

USGS Study Confirms An Urban Air-Pollution Problem At Mount Rainier National Park

...ly due to the transport ofpollutants by prevailing winds inland from urban sources, such as the Seattlemetropolitan area. A common visitor destination in the park, known as Paradise, is on the southernslope of Mount Rainier at an elevation of 5,400 feet and a distance of about 60miles from Seattle. Peter...

Stakeholders improve global change assessment

...nd drought as important, but they also viewed high winds a major problem as didforest managers. "Large water systems had more weather-related problems than small ones,possibly because the large systems are more complex," says Anderson. "Initiallywe thought small water systems with fewer resources ...

Researchers at Cedars-Sinai Medical Center to present first documentation of man-made chemical contaminants in the amniotic fluid of unborn babies

...ay actually have higher PCB exposures." Prevailing winds carrying pesticides from third-world countries, localindustries and even regional dietary factors may play a part in the varyinglevels of certain chemical exposures. The proposed study will compare resultsfrom the Pacific Coast region with those from...

Catastrophic draining of huge lakes tied to ancient global cooling event

...ere, said Barber. Under normal conditions, winds blowing from the west across the Atlanticsend air warmed by the sea toward Western Europe, said Barber. About one-thirdof the heat that warms Western Europe is delivered by the ocean, while the othertwo-thirds comes from the sun, he said. A...

Hurricane Hugo serves as living laboratory for Clemson University forest scientists

...m passed through the state, with reportedsustained winds of 121 miles-per-hour and reported gusts up to 147...t land (4.5 million acres) was damaged by the high winds and atidal surge up to 20 feet above sea level that swept saltwater inland. Hugoaffected a larger a...

Clemson's Baruch Forest Science Institute tracks forests' recovery from hurricane damage

... by the hurricane'sreported 100-plus mile-per-hour winds and by the rapid growth of seedlingsreleased by the creation of open spaces. A major change Gresham and other scientists have noted is that the new growth is by the"pioneer" species of pine, sweet gum and black gum instead of the "climax"species of ...

New books view storms, the stratosphere, and more

... That expedition discovered then-inexplicable west winds inthe stratosphere above the equator that were blowing in the oppositedirection from the surface trade winds. From there, progress inunderstanding the stratosphere has included a sequence of majordiscoveries: the ozone layer in the 1930s; sudden expl...

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