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Tag: "cloud" at biology news

Researchers reveal the infectious impact of salmon farms on wild salmon

...he sea lice, the migrating school becomes a moving cloud of contagions. Sea lice larvae mature and reproduce on the seaward salmon with each louse producing 300-800 eggs. This second round of lice larvae can re-infect the fish in the school and can spread to other previously unexposed populations coming fr...

Nanobacteria in clouds could spread disease, scientists claim

...ht also play a prominent role in the nucleation of cloud drops. "This happens because nanobacteria, lifted...nanobacteria makes them act as extremely efficient cloud condensation nuclei, with a tendency to aggregate to clusters upon contact." Their work corroborate...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...he storm during daylight, returning details of its cloud structure and pressure. Notably large waves are ...s, enabling researchers to observe high-atmosphere cloud structure and pressure in the visible and infrared spectrum, while at the same time using radar back...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...tion in sea ice in the summer or to an increase in cloud cover. The observed summer temperature increases are likely related to a global warming trend that has led to a longer snow-free season and an increase in the extent of woody vegetation. Both of these changes increase the amount of solar radiation t...

Toxic flood lifts lid on common urban pollution problem

...nging on its ability to support life. Particulates cloud water, reducing sunlight penetration and plant growth. Once they cross a certain threshold, organic chemicals and metals also can be harmful to people. New Orleans officials remain extremely concerned about bacterial contamination in the flood water...

NASA satellite data provides rapid analysis of Amazon deforestation

... forest regions, image quality is often reduced by cloud cover and infrequent coverage of high-resolution images. But MODIS obtains images of the Amazon up to four times per day and evaluations of the quality of data are provided with the image, clearly marking areas of clouds, water, or high aerosols. The...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...re are many important issues to deal with, such as cloud cover and the highly variable reflectivity of the surface, as well as having the absorption or emission of stratospheric and upper atmospheric species situated between the troposphere and the instrument. "First with GOME and now much better with SC...

New study pinpoints epicenters of Earth's imminent extinctions

...ans, reptiles, and conifers are monkey-faced bats, cloud rats, golden moles, poison frogs, exotic parrots and hummingbirds, a hamster and a dormouse, a penguin, crocodiles, iguanas, monkeys, and a rhinoceros. Among the most intriguingly-named are: the Bloody Bay poison frog, the volcano rabbit, the Ruo Riv...

Pretreating rogue cancer cells with aspirin cripples their resistance to targeted therapy

...ans, reptiles, and conifers are monkey-faced bats, cloud rats, golden moles, poison frogs, exotic parrots and hummingbirds, a hamster and a dormouse, a penguin, crocodiles, iguanas, monkeys, and a rhinoceros. Among the most intriguingly-named are: the Bloody Bay poison frog, the volcano rabbit, the Ruo Riv...

Scientist measures role of science's coolest player: The snow

...of climatic variables including soil temperatures, cloud cover, atmospheric circulation patterns and soil moisture levels. Aside from his temperature-related projections, Vavrus also made the counterintuitive finding that in the absence of snow, total regions of permafrost-the permanently frozen soil of t...

Climate change drives widespread amphibian extinctions

...t NatureServe who took part in the study. "If this cloud has any silver lining, that's it." The new theory... in the 1980s and 1990s. In the famed Costa Rican cloud forests, for example, the Monteverde harlequin frog disappeared in the late 1980s, as did the golden...

Potential heart benefit found in stem cells

...thical dilemmas about embryonic cells continues to cloud the field. In research presented today at the American College of Cardiology's 55th Annual Scientific Session, scientists continue to explore mature stem cell sources for potentially significant cardiovascular benefits. ACC.06 is the premier cardio...

Tiny airborne particles are a major cause of climate change

... gravity takes over, causing them to fall from the cloud in the form of rain. One of the controversies su...his alter the whole water cycle, but the increased cloud cover reflects more of the sun's radiation back into space, creating a local cooling effect on Earth...

Record air pollution above the Arctic

...d or solid and serve as condensation nuclei during cloud formation. It is these properties that lead to aerosols influencing the climate system. „The present air pollution is more than 2.5 fold higher than values measured in spring 2000. As a consequence, we expect significantly increase warming ", explain...

Pollutant haze heats the Arctic

...ears of measurements from the two sites to measure cloud "emissivity" ?how much clouds act like a blanket ?... was true is that the pollution particles made the cloud droplets more numerous, but consequently smaller. Even if the amount of water is the same in the clo...

Researchers link ocean organisms with increased cloud cover and potential climate change

...biosphere grew out of efforts to explain increased cloud cover observed over an area of the Southern Ocean ...ytoplankton ?may have contributed to a doubling of cloud droplet concentrations seen over a large area of ocean off the eastern coast of South America. ...

Salmon farms kill wild fish, study shows

...t pens along the migration routes. The result is a cloud of sea lice through which the juveniles must migrate. "It takes only one or two sea lice to kill a juvenile pink or chum salmon," said Krkosek. "The juveniles are so vulnerable because they are so small ?only one to two inches long." "We often worr...

When smell cells fail they call in stem cell reserves

...s, Reed’s team exposed mouse olfactory nerves to a cloud of toxic methyl-bromide gas. Methyl bromide kills not only olfactory nerve cells but also neighboring, non-nerve cells in the nasal passage. Three weeks after chemical exposure, the researchers examined nasal cells to see which, if any, had grown bac...

Novel laboratory technique nudges genes into activity

...ult in disease. Surrounding the chromosome is a cloud of proteins that helps determine whether or not a particular gene’s instructions are "read" and "copied" to strands of messenger RNA, which then ferry the plans to protein-making "factories" in the cell. In its experiments, the UT Southwestern te...

Global 'sunscreen' has likely thinned, report NASA scientists

... recent dimming and brightening trends ?changes in cloud cover have not been ruled out ?another new researc...pinning up of the water cycle of evaporation, more cloud formation and more rainfall ?has not yet been observed. "Less sunlight reaching the surface countera...

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