PPT-Stratospheric Ozone

Tuesday January 5 th 2015 Good up high bad nearby Troposphere Thinnest layer of atmosphere 80 mass almost all H 2 O 004 ppm O 3 Stratosphere 10 ppm O 3 Characteristics of O 3 Highly poisonous strong odor irritant colorless gas. 6 20 Questions 2010 Update Section I OZONE IN OUR ATMOSPHERE Stratospheric ozone Stratospheric ozone is formed naturally by chemical reactions involving solar ultraviolet radiation sunlight and oxygen molecules Stratospheric ozone: the natural cycle Produced in stratosphere by dissociation of oxygen atoms exposed to short-wave radiation Reaction accounts for most of adsorption of ultraviolet sunlight () as w 3. variability over recent decades: Stratospheric intrusions. , Asian pollution, and . climate. Meiyun Lin . Presented at Air Quality Research Subcommittee Meeting, Feb-19-2015 . Acknowledgements: . 3. variability over recent decades: . Stratospheric intrusions. , Asian pollution, and . C. limate Variability. Meiyun Lin. (Princeton University/GFDL). HTAP/WRAP Workshop, 13-May-2015 . Major challenges for western US air quality management. the progression of the Ozone hole over the antarctic from 1970 to 1997.. Some effects on plant and animal tissue as UV radiation increases. decrease in agricultural yields and a decrease in overall forest productivity. the Upper Troposphere - Lower Stratosphere. K. . Wargan, . S. . Pawson. , . M. . Olsen, . J. . Witte, . A. . Douglass. Global Modeling and Assimilation Office (GMAO). Chemistry and Dynamics Branch. NASA GSFC. Observations, processes, and impact on climate. Stefanie . Kremser. and Larry Thomason. with the help of MANY others…. SSiRC. Workshop 2016 – 25 April. Stratospheric Aerosol: The stuff that dreams are made of. Ozone Depletion(Chapter 25). Ozone Properties. Ozone (O. 3. ). is a triatomic form of oxygen found mostly in the lower half of the atmosphere. Highly reactive strong oxidant. Tropospheric pollutant produced by photochemical reactions. Workshop . 28 - 30th October 2013. Ray Wang & GT for hosting us. Tom Becher for support (SSiRC web-page). Kendra Nolley for on-site support. SPARC & WCRP for travel support. Thanks to. Ice-breaker: TODAY 6:15 pm. First, what is the ozone problem? . About 2 billion years ago Life on Earth was entirely single-celled organisms living in the oceans when one type of bacteria (. Cyano. ) began emitting Oxygen to the atmosphere. . The . ozone layer or ozone shield . is a region of Earth's stratosphere that absorbs most of the Sun's UV radiation. . It contains high concentration of ozone (O3).. It is a pale blue gas at room temperature.. Nitrous . Oxide (N. 2. O). : The Dominant Ozone-Depleting Substance Emitted in the 21. st. . Century, A. . R. . Ravishankara, John S. Daniel, and Robert W. . Portmann, . SCIENCE. , . Vol. . 326, Pages: 123-125, 2009 (OCT 2. Retrievals . from . Joint UV and Visible . Measurements by the . TEMPO. Juseon Bak, Xiong Liu, Chris Miller, Kelly Chance. ,. John Houck, Ewan O’Sullivan, Caroline R. . Nowlan. , G. Gonzalez . Abad @ . S. Weber. 1. , R. Ruhnke. 1. , P. Braesicke. 1. , C. Scharun. 1. 1. Institute of Meteorology . and Climate Research. Significance of stratospheric ozone (O. 3. ):. Plays a critical role in absorbing ultraviolet (UV) radiation emitted by the sun.