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Tag: "clouds" at biology news

Nanobacteria in clouds could spread disease, scientists claim

Micro-organisms in clouds could play a crucial role in the spread of disease...s considerably smaller than ordinary bacteria - in clouds are published in two recent articles in the Journal of Proteome Research by Dr Andrei P. Sommer of t...

Atmosphere may cleanse itself better than previously thought

...ch are relatively direct: either water droplets in clouds absorb them and rain them out, or sunlight strikes them and the energy breaks the molecules apart. "The third way is the one we are concerned with here, the way that involves breaking these hydrocarbons down chemically," Francisco said. "For that, t...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...ellite's radar was able to pierce through swirling clouds to directly show how the storm churns the sea surf...intensification. "Radar images penetrate through clouds and can easily detect the eye replacement cycle of hurricanes which are precursors to further intens...

Study uncovers dirty little secret: Soil emissions are much-bigger-than-expected component of air pollution

...oducing ozone smog, they help form the dirty brown clouds that often hang over major cities, they contribute to acid rain and they play a role in global climate change. In addition to equatorial Africa, hot spots for soil emissions include the central plains of the United States; southwestern Europe, prima...

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

...ution of trace gases, ozone and related chemicals, clouds and dust particles throughout the atmosphere. With a 960-km swath and alternate limb and nadir observations, SCIAMACHY covers the entire world every six days at the equator and more often at high latitudes. This versatile instrument represents a na...

Tiny airborne particles are a major cause of climate change

...tempts to understand how these particles influence clouds have generated many uncertainties. A new paper by ...up into the atmosphere, creating larger and taller clouds that will persist longer. Not only does this alter the whole water cycle, but the increased cloud co...

Tropical forest CO2 emissions tied to nutrient increases

... that humans are increasing the size of these dust clouds as both land-use patterns and climate change, which in turn can change the availability of nutrients to forests," he said. Nitrogen pollution also is increasing around the world, including in tropical forests, a result of fossil-fuel combustion and ...

Pollutant haze heats the Arctic

...ted long distances to the Arctic, where it changes clouds so that they become more effective blankets, trapp...cientists already knew particulate pollutants make clouds more effective at reflecting sunlight, which reduces surface temperatures. So the newly discovered e...

Selecting life: Scientists find new way to search for origin of life

...y sources. Abundant biomolecules form in molecular clouds in deep space, and these extraterrestrial compounds must have rained down on the early Earth. Other molecular synthesis was driven by lightning and ultraviolet radiation in the atmosphere or volcanic heat and chemical reactions in the deep oceans. So...

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

...ocean phytoplankton may influence the formation of clouds that reflect sunlight away from our planet. Discovery of the new link between clouds and the biosphere grew out of efforts to explain increased cloud cover observed over an area of the ...

Record ozone loss during 2006 over South Pole

...nuous darkness of this season, polar stratospheric clouds are formed that contain chlorine. As the polar ...g sunlight and the presence of polar stratospheric clouds leads to splitting of chlorine compounds into highly ozone-reactive radicals that break ozone down i...

Satellites shed light on global warming

...of ice sheets because it is able to pierce through clouds and darkness. In addition to mapping ice boundaries, Rott used repeat-pass ASAR image data to map the flow velocities of glaciers. All the glaciers, where the buttressing ice had disappeared, have accelerated significantly. The retreat of grounde...

Global 'sunscreen' has likely thinned, report NASA scientists

...ellite measurements originally designed to observe clouds and weather systems that date back to 1978. The re...effects that contribute to dimming, such as making clouds more reflective and longer-lasting. These effects were found to be almost as important as the direct...

New species declared: Clouded leopard on Borneo and Sumatra

...ipe. Clouded leopards from the mainland have large clouds on their skin with fewer, often faint, spots within the cloud markings, and they are lighter in color, with a tendency toward tawny-colored fur and a partial double dorsal stripe. “Who said a leopard can never change its spots? For over a hundre...

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