Collaborative Research: Drought in the Australian Outback: Milankovitch and Anthropogenic Forcing of the Australian Monsoon

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WPC 2 B P Z Courier 10cpi #| x w x 6 X @ 8 ; X @ HP LaserJet III HPLASIII.PRS x @ , \ , J KX @ #| x 2 Z B " X HP LaserJet III HPLASIII.PRS x @ , \ , J KX @Courier 10cpi CG Times (Scalable) " m + O 6 ^$(8k (((k((((((xkx5kWLRYLGWY(/TLmYWEWP@LYWqWWN((((555(!!! ,/!W555x ( ! W5W5W5W5W5kPR5L5L5L5L5(!(!(!(!YWWWWYYYYWW5YWWWYEW5W5W5R5R5R5R5YL5L5L5L5WWWWWWYY(!(!(!(!XC/ TL!L!L!L!L!YYGYYWWkWP,P,P,@/@/@/@/L!L!L!YYYYYYqWWN5N5N5 YL!YP,@/L!WWYWY ( ( ((WxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxNWWW (511ikk*k* (( k xxII xxW GddCCk ( q *"xxxxWWxxxWxxWWkkxxx Õkkxxx k((xxxxxWIxkWWWWWWWWWWx(xWCkxWxP(W5EW NxxWWWWWWWWWWxxxxx8xWWWWxxxxxxxxxxxxx xxxxxxWWxxxxxxdPI xWx xx 3G WWWW xx x xx x WWWWWxWWxxx WW W5 WWWW5 WWWWW WWW WWW WWW WWWWWWWWWWWWWW W WWWWWW WWWWWWWW( WWW( WWW( WWW( WWWW W W WWWW WWW WILC ICP5L/N5YW5(!T5PCmCY5PW5WIEI L5W5PIWC IIII/!!555I5I I II (( IIIIIIIIIIIIIIIIIII///////!!!!!!!!!!!!5555555555555555555IIIIIIIIIIIIIIIIIIII( E WLY(WWI(W 5( x ? x x x , x 6 X @ 8 ; X @ g V " G ( $ , h G P 7 h P {3rC t t; F # r f3r. r F 4 N3r t t u F 3^Y X PS2 ? 2r t u t j3 X u PL P P @ X 4rS t u 4 t3 u VF t% 2 ATM 9310969 Fogel Carnegie Institution of Washington Title: ` ` Collaborative Research: Drought in the Australian Outback: Milankovitch and Anthropogenic Forcing of the Australian Monsoon The Lake Eyre Basin, an interior basin covering one sixth of the Australian continent, receives the vast majority of its precipitation from cyclonic disturbances associated with the summer monsoon. The Australian summer monsoon is strongly influenced by the Asian winter monsoon, the intensity of which is controlled by changes in solar radiation caused by variations in the Earth's orbit around the sun (Milankovitch effect). This award supports research designed 10 to develop an improved geochronology of lake full events as a first order test of the proposition that January insolation over the Tibetan Plateau can be as a proxy for the intensity of the Australian monsoon; 2) to produce an independent reconstruction of aridity for the last 150 ka across the basin, and reconstruct vegetation during the last lake full interval (60 70 ka), using the isotopic composition of organic and inorganic molecules preserved in ratite eggshells C (reflecting the proportion of C 3 and C 4 plants), and 3) to test the potential impact of vegetation change on climate by modeling the penetration of monsoonal precipitation into the Lake Eyre Basin C T with a high resolution (3 o grid) Global Circulation Model incorporating two different vegetation regimes.