Abstracts » Zoology and wildlife conservation

Middle atmosphere cooling

Article Abstract:

Declining levels of sodium in the mesosphere 90 kilometers above the Earth's surface are probably due to greenhouse gases. B.R. Clemesha, D.M. Simonich and P.P. Batista used lidar, or laser-infrared ranging, to gauge the quantity of mesospheric sodium. The loss of sodium indicates that the greenhouse gases are both warming the lower atmosphere and cooling the middle atmosphere. These findings may suggest that the first manifestations of world-wide climatic changes will be detected in the atmosphere's higher regions.

Environmental aspects, Greenhouse gases, Mesosphere

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Formation of atmospheric particles from organic acids produced by forests

Article Abstract:

Atmospheric aerosol formation is an important process and the number-concentration of total atmospheric aerosols and cloud condensation nuclei is mainly contributed by organic aerosols, mostly formed from gas-to-particle conversion. Gaseous and particulate atmospheric species from a forested area were measured to show that some emitted hydrocarbons are photo-oxidized to organic acids, condensing to form organic aerosols.

Observations, Forest microclimatology

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Thermolysis of fluoropolymers as a potential source of halogenated organic acids in the environment

Article Abstract:

Research is presented concerning the production of chlorodifluoroacetate and trifluoroacetate during the thermolysis of commercial polymers such as Kel-F and Teflon. The environmental significance of this reaction is discussed.

Production management, Letter to the Editor, Polytetrafluoroethylene, Halogenation

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