Ozone and UV bulletin
The stratosphere ozone layer is slowly recovering and the recovery will be complete in most parts of the atmosphere in the coming decades, according to the latest bulletin by the World Meteorological Organization
Atmosphere And Ozone Layer
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Extensive halogen-mediated ozone destruction over the tropical Atlantic Ocean
Increasing tropospheric ozone levels over the past 150 years have led to a significant climate perturbation; the prediction of future trends in tropospheric ozone will require a full understanding of both its precursor emissions and its destruction processes. A large proportion of tropospheric ozone loss occurs in the tropical marine boundary layer and is thought to be driven primarily by high ozone photolysis rates in the presence of high concentrations of water vapour.
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Sun, sea and ozone destruction
Halogens are known to decrease the levels of stratospheric ozone. The latest measurements show that something similar occurs in the lower atmosphere over tropical oceans
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Cloud seeding for five years
The state government on Wednesday decided to continue the controversial cloud seeding operations for another five years. Tenders have been called to select the company which will conduct the operations. A top official said that there was actually no scientific reason for continuing the programme but added that there was
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A perspective on reactive nitrogen in a global, Asian and Indian context
<p>Reactive nitrogen (Nr) includes the inorganic (NH3, NH4, NOx, HNO3, N2O, NO3) and organic forms (urea, amines, proteins, nucleic acids) that readily participate in various reactions of the global N cycle. Over the last half a century, anthropogenic perturbations of the natural N cycle have led to the increasing accumulation of inorganic Nr in the soil, water and air, intentionally through agriculture and unintentionally through fosill-fuel consumption and other activities, adversely affecting human health, biodiversity, environment and climate change.</p> <p><a href="http://www.currentscience.ac.in/Downloads/article_id_094_11_1375_1381_0.pdf" target="_blank"><strong>Original Source</strong></a></p>
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Cloud classification in NOAA AVHRR imageries using spectral and textural featuers
Clouds contribute significantly to the formation of many of the natural hazards. Hence cloud mapping and its classification becomes a major component of the various physical models which are used for forecasting natural hazards.
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Impacts of atmospheric anthropogenic nitrogen on the open ocean
Increasing quantities of atmospheric anthropogenic fixed nitrogen entering the open ocean could account for up to about a third of the ocean's external (nonrecycled) nitrogen supply and up to ~3% of the annual new marine biological production, ~0.3 petagram of carbon per year. This input could account for the production of up to ~1.6 teragrams of nitrous oxide (N2O) per year.
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Dust-rainfall feedbacks in the West African Sahel
<p>Dust aerosols can suppress rainfall by increasing the number of cloud condensation nuclei in warm clouds and affecting the surface radiation budget and boundary layer instability. The extent to which
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State to seed clouds despite poor results
At a time when the Chief Minister and other ministers are praising the rain gods for regular showers and releasing thanksgiving advertisements, the rain shadow areas development department (RSAD) claims that its efforts have paid rich dividends. Impressed by the "work" done by the private aviation company M/s Agni Aviation, the government has decided to continue the cloud seeding operation in the drought-prone areas of the state for another five years, from 2008-09. But no scientific data is available so far that could clearly prove the impact of cloud seeding.
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India-Pakistan nuclear war would cause ozone hole
Nuclear war between India and Pakistan would cause more than slaughter and destruction -- it would knock a big hole in the ozone layer, affecting crops, animals and people worldwide, US researchers said on Monday. Fires from burning cities would send 5 million metric tonnes of soot or more into the lowest part of Earth's atmosphere known as the troposphere, and heat from the sun would carry these blackened particles into the stratosphere, the team at the University of Colorado reported.
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Global phosphorus flows and environmental impacts from a consumption perspective
Human activities have significantly intensified natural phosphorus cycles, which has resulted in some serious environmental problems that modern societies face today. This article attempts to quantify the global phosphorus flows associated with present day mining, farming, animal feeding, and household consumption. Various physical characteristics of the related phosphorus fluxes as well as their environmental impacts in different economies, including the United States, European countries, and China, are examined.