lecture27 - :Mé'zH‘O‘fih‘a/x“ L aHdhu-Ideugi 6w...

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Unformatted text preview: :Mé'zH‘O‘fih‘a/x“ L aHdhu-Ideugi 6w allatouwow" ; OJ-[aoQu'n-D “Wad—5 an: a 00035 55 Wakes-aka.) \bNA. Pmkcgtfia {flaw-C .ég‘H WASH 3 _. j 2 GEE—— CLEZOCH3 aA/Swd aA/XLACQ [0mm 66 mat-w a?” “fig”: ma” .0 WUE’W Oboe? Norway) (grow/HM. bMA 0F QmLmM € W) ® 0- M06."- Q «1— c‘fsru PM svlmoi-o re Q9 KDmMW? 06+ Amaé Haflzaw O OOOA' Giff/[REFORM Calarll£> CH ca 3 (/th PO$0PM C 02% wean Mmomonae 9 “FAN: CKk/‘QJU {4461‘s 02. CAH‘Z'd-Z "—5? Co: + H20 CA HMXL 9% M Mac/Hm 9 Ton F F r F wag ~62; l TI C ZfC Z m‘fi I CI A «LA/M Q, P P HOW; C’F Lab/‘61 e‘s wtrtaaifl'vc’ ~— aoblar 9J9 Lo kflak The Law of Unintended Consequences Thomas Midgley, Jr. 1889 — 1944 C|3H20H3 H30HZC—PIb-CH2CH3 CHZCHg Developed tetraethyllead (antiknock fuel additive) But... Pb is toxic! Thames I'irfidglegg J r. F Developed CFCs I (nontoxic refrigerant) 0"?” But CFCs make CI radicals, F Destroy stratospheric ozone Brilliant solutions to chemical problems, but ultimately... ® CEAEOFO‘PEUM (arng CFZCIZ “me~\2“ MOW/Wm? in. Re 0201\2 {Dub-£7! w c .. 5 :- 02 +— o Efll-er CFCsI (Lama 1’51? C\' + "CCIFZ We. cr Cr + o ..._.7 ClO' + o Désmaczs 5 Z 020N€_/ C‘O. “’ O '—"'7 a. + 0; remakes CV CFCS cut [850) aimbte uni—1" keel? rmch é—Le stsPLere) were 8&5 lacuna-a CV Makewp Cl” is 01/1 OZOA‘Q’ AesMbaLE mcLL‘ne Antarctic Ozone Hole G“ .S) (\1 (’\ Which compound is not an ozone depleter? A. CF3-CFH2 B. CFZCIZ c. CHCI3 D. CFCIZ—CH3 E. CHFZCI Montreal Protocol In force since 1989: Phases out C-Cl compounds Atmospheric time—series ofCFC-12 600 —* Northern hemisphere Antarctic ozone minimum (60* - 90"“ S} — fiouthem hernia» here 200 19‘29'1992 NambU‘s moms 500 19834555 Meteur3 TOMS ___ 130 1935 (no Tomsmurmt] m 2 19364003 Earth Probe TOMS E g 160 E4400 3 E E 14" §300 E 5 J; U 120 3‘4. 200 100 U so 100 1930 1985 1990 1995 2000 2005 YBKII‘ NASNNGM Data 109m 1920 1930 I940 :959 i960 1970 1080 1990 2000 EU degree-s. North to at: degrees South Tlmebrear] Lu 4 - ‘ i ‘ ' ‘ ' ‘ i It: 3 . . . "r . . 0 finmalé declune of stnatosphem g chllonne due to Montreaf Protocol Mostly a success Story." A ‘ 32 "1 9 First Stage of g 1‘ fizone Recovery 0 Temlpioranrreductian I". 3 {rm rat .4 rowmng ML Pinatubo—+31“ w ‘ 1980 1985 1993 1995 EDGE?! 213135 YEAR; ...is there hope for C02? rize in Chemistry Mario J. Molina F. Sherwood Rowland Paul J. Crutzen "for their work in atmospheric chemistry, particularly concerning the formation and decomposition of ozone" ...
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lecture27 - :Mé'zH‘O‘fih‘a/x“ L aHdhu-Ideugi 6w...

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