PDF-Stratospheric ozone is destroyed by reactions involving reactive halogen gases which are

The most reactive of these gases are chlorine monoxide ClO bromine monoxide BrO and chlorine and bromine atoms Cl and Br These gases participate in three prin cipal reaction cycles that destroy ozone Cycle 1 Ozone destruction Cycle 1 is illustrated. 24 tratospheric ozone is destroyed by reactions involving reactive halogen gases which are produced in the chemi cal conversion of halogen source gases see Figure Q81 57374e most reactive of Q.20 Halogen source gases containing chlorine and bromine are chemi - cally converted to reactive halogen gases primarily in the stratosphere. The conversion requires solar ultraviolet radiation an B.Satyanarayana, Tata Institute of Fundamental Research, Mumbai. Lecture – I. Saturday, July 2, 2011. B.Satyanarayana, TIFR, Mumbai Resistive Plate Chambers & INO’s ICAL detector SERCEHEP11, VECC, Kolkata. 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. by . David Gray. Scientific use. Background ozone. ozone present through natural or nonlocal sources. currently ranges from 20-45 ppb in North . America. Rising background ozone could mean non-attainment for much of North America. Tuesday, January 5. th. , 2015. Good up high, bad nearby. Troposphere:. Thinnest layer of atmosphere, 80% mass, almost all H. 2. O. 0.04 ppm O. 3. Stratosphere: 10 ppm O. 3. Characteristics of O. 3. Highly poisonous, strong odor, irritant, colorless gas. AND CURRENT STATUS. GLY 4241 - Lecture 8 . Fall, 2016. Mount Pinatubo Eruption, 1991. 2. 3. 1997 Montserrat Eruption. 4. Sulfur Dioxide Conversion. 5. Aerosol Optical Depth Analyses. BRW is Pt. Barrow, Alaska. Dr. . Shatha. I . Alaqeel. 108 . Chem. Learning Objectives. Chapter five discusses the following topics and by the end of this chapter the students will:. . . Recognize the structure and classes of alkyl halides. 2. Ozone – Two Faces. Troposphere – Bad Ozone. Pollution . Photochemical smog. . Eye irritant. Stratosphere – Good Ozone. Blocks some UV radiation. Hole caused by depletion due. to ODC’s . Low Smoke Halogen Free Cable Materials Market Report published by value market research, it provides a comprehensive market analysis which includes market size, share, value, growth, trends during forecast period 2019-2025 along with strategic development of the key player with their market share. Further, the market has been bifurcated into sub-segments with regional and country market with in-depth analysis. View More @ https://www.valuemarketresearch.com/report/low-smoke-halogen-free-cable-materials-market Peng Liu. 1. , Christian Hogrefe. 2. , Rohit Mathur. 2. , Uarporn Nopmongcol. 3. , Shawn Roselle. 2. , Tanya Spero. 2. . 1 . NRC Associate at US EPA, RTP, NC 27711, USA. . 2. National Exposure Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA. 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. climate. change . in the CMIP5 models. Alexey Karpechko &. Elisa Manzini. 22.4.2013. 2. Contributions . from . many . people, . most importantly:. James Anstey,. Seok. -Woo . Son. ,. Paolo Davini,.