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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />Table of Contents <br /> <br />Title Page <br /> <br /> <br />Abstract ...'.'. __ __........ ....... --...... .. ... .. __ ..... __.. ... ....................... "'" .. '.'" ............... II <br /> <br />.-\ckno\\'ledgments ..... __........ __ __........ __.. ... __....................__ __............ __.....__..................... __. IV <br /> <br /> <br />T able of Contents ... __. __................. __............................................... __ __.................... __..". v <br /> <br />L r\TRODCCTIOK......... __ __.......... ... __ __..__......... __ .... .,__""...'.",., ...__ __.................. 1 <br /> <br />II. 1994 ~OA-,A.-CTAH PROJECT AREA, INSTRUMENTATION Ai"ID DATA .... 3 <br />III. 1994 STOR.;,\:l PERIOD DESCRIPTIONS ...______...__........__..............__..____.....__... 9 <br />A. 26 January 1994 Storm Period . ____. __... ...... __".__"'" ____. .... .__....... __...... 10 <br />B. 7-8 February 1994 Storm Period __............____...................................__. 15 <br />C. 10-11 February 1994 Storm Period ....__......________..........__...__............__..... 21 <br />D. 18-22 Februarv 1994 Storm Period . ......... __....... __... .__'.''''''.'.'....''''''. __.... 25 <br />E. 27 February 1994 Storm Period ..................____....__..................__........ 42 <br />IV. 1994 ~OA.A.-UTAH CASE STIJDIES ..____..........__......__.............................. 45 <br />A. 26 January Case Study ...__........................__.....__.......................__..... 46 <br />1. Additional Meteorological Observations ...' __...................... __..... __ __ __.. 46 <br /> <br /> <br />2. Radar Summarv ......... ................. __..... ............... __ ..__... ................. ..... 50 <br /> <br />3. Observations within Seeding Plumes .............__.......__......__........__. 54 <br /> <br />4. Summarv of26 Januarv Case .__.................................................... 61 <br />- ~ <br /> <br />B. 7 February 1994 Case Study ...................__.......__...................................... 62 <br />1. Additional ~leteorological Data ........__.........__........__........................ 62 <br />2. Radar Observations .................. __............................. __. __.............. 65 <br />3. Comparative Radiometer Measurements __.....................__..........__...... 68 <br />C. 19 February 1994 Case Study ..................__.........__.__...................... 72 <br />1. Atmospheric Conditions during the AgI Seeding Experiment ............ 72 <br />") Seeding Plumes Documented by the Instrumented Van and Aircraft .. 76 <br />3. Seeding Plumes Documented by the K..-band Radar .................... 86 <br />4. Summary of Seeding Effects on 19 February 1994 .................... 97 <br />V. SNOW CHEMISTRY RESULTS FROM 1994 SEEDING EXPERIMENTS ..... 99 <br />VI. SUylM..<\RY OF RESCLTS ................................................................................ 117 <br /> <br /> <br />\;11. REFERENCES . ............... ... ............... .... ... ............... .... ..... .............. .'. .......... 121 <br /> <br />APPE~1)IX .................................. ............... ..... ..__........... ..... .......... ......... ....................... I?~ <br /> <br />v <br />