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[Badass version fullprintingteeshirt] fathers day dad a real american hero shirt

wood-based products and help increase service lifetimes in the face of variations in UV radiation or climate change. These microplastic particles concentrate toxic chemicals dissolved in seawater and are ingested by zooplankton, thus providing a potential mechanism for the transfer of pollutants into the marine food web. While the process has not been studied in any great detail, the production of microplastics will likely increase at high solar UV-B radiation levels andor elevated temperatures. Although it is well known that lignin is one of the components of dead vegetation most resistant to biotic decomposition, new results have shown that lignin is readily decomposed with exposure to solar UV radiation. Consequently, UV-induced degradation of plant litter is correlated with its lignin content, reducing long-term storage of carbon in terrestrial systems. The decrease in the depth of the upper mixed layer exposes organisms that dwell in it to greater amounts of solar visible and UV radiation which may overwhelm their capability for protection and repair. Enhanced stratification also reduces upward transport of nutrients across the thermocline from deeper layers. In the polar waters, increasing temperature results in explosions of phytoplankton growth under the ice and around the ice edges. Because Antarctica is surrounded by water, winds over the continent blow in a unique clockwise direction creating a so called “polar vortex” that effectively contains a single static air mass over the continent. As a result, air over Antarctica does not mix with air in the rest of the earth’s atmosphere. Figure courtesy of NOAA.From 1985 to 1988, researchers studying atmospheric properties over the south pole continually noticed significantly reduced concentrations of ozone directly over the continent of Antarctica. For three years it was assumed that the ozone data was incorrect and was due to some type of instrument malfunction. In 1988, researchers finally realized their error and concluded that an enormous hole in the ozone layer had indeed developed over Antarctica. Examination of NASA satellite data later showed that the hole had begun to develop in the mid 1970’s. Scientists also discovered that the thinning in the ozone layer was caused by increasing concentrations of ozone-depleting chemicals – chlorofluorocarbons or CFCs compounds with chlorine andor fluorine attached to carbon and to a lesser extent halons . These chemicals can remain in the atmosphere for decades to over a century. Polar stratospheric clouds create the conditions for drastic ozone destruction, providing a surface for chlorine to change into ozone-destroying form. They generally last until the sun comes up in the spring. Ozone sits in the upper atmosphere and absorbs ultraviolet radiaton, another type of solar energy that’s harmful to humans, animals and plants. CFCs and halons cause chemical reactions that break down ozone molecules, reducing ozone’s ultraviolet radiation-

fathers day dad a real american hero shirt
fathers day dad a real american hero shirt

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