TY - JOUR
T1 - Tracing environmental change in southern Patagonia using beryllium isotopes, Laguna Potrok Aike, Argentina
AU - Kim, Kyeong Ja
AU - Zolitschka, Bernd
AU - Jull, Timothy A.J.
AU - Ohlendorf, Christian
AU - Haberzettl, Torsten
AU - Matsuzaki, Hiroyuki
N1 - Funding Information:
This work was supported by the Basic Science Project of KIGAM funded by the Ministry of Economy and Knowledge of Korea , K-IODP funded by the Ministry of Education, Science and Technology of Korea , and the German Ministry of Education and Research . We would like to thank the members of the SALSA (South Argentinean Lake Sediment Archives and Modeling) project for help during field work which was funded by the German Climate Research Program DEKLIM ( 01 LD 0034 and 0035 ). Work at the University of Arizona was funded as part of NSF grant EAR06-22235 .
PY - 2012/6
Y1 - 2012/6
N2 - We have examined the relationship between beryllium isotopes and the hydrological record of Laguna Potrok Aike, a maar lake in southern Argentina for the past 16,000 cal BP. Our study shows that sedimentary 10Be and 9Be records of Laguna Potrok Aike are associated with the hydrological balance, when compared to other proxies such as Ca, Ti and total inorganic carbon (TIC). During drier periods, the level of 9Be is decreased. 10Be follows this trend from 16,000 to 8000 cal BP, for younger samples, the concentration of 10Be increases at about 5000 cal BP and in recent times, but is otherwise relatively constant. At 13,000 cal BP total beryllium ( 9Be) was relatively low, but the 10Be/ 9Be ratio was the highest for the entire record studied. Our study shows that beryllium isotopes can be used for tracing climatic signals associated with lake level changes, i.e., dry or wet conditions at Laguna Potrok Aike.
AB - We have examined the relationship between beryllium isotopes and the hydrological record of Laguna Potrok Aike, a maar lake in southern Argentina for the past 16,000 cal BP. Our study shows that sedimentary 10Be and 9Be records of Laguna Potrok Aike are associated with the hydrological balance, when compared to other proxies such as Ca, Ti and total inorganic carbon (TIC). During drier periods, the level of 9Be is decreased. 10Be follows this trend from 16,000 to 8000 cal BP, for younger samples, the concentration of 10Be increases at about 5000 cal BP and in recent times, but is otherwise relatively constant. At 13,000 cal BP total beryllium ( 9Be) was relatively low, but the 10Be/ 9Be ratio was the highest for the entire record studied. Our study shows that beryllium isotopes can be used for tracing climatic signals associated with lake level changes, i.e., dry or wet conditions at Laguna Potrok Aike.
KW - Be-10
KW - Be-10/Be-9
KW - Be-9
KW - Hydrological variations
KW - Laguna Potrok Aike
KW - Lake sediment
KW - Patagonia
UR - http://www.scopus.com/inward/record.url?scp=84862778613&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84862778613&partnerID=8YFLogxK
U2 - 10.1016/j.quageo.2012.02.006
DO - 10.1016/j.quageo.2012.02.006
M3 - Article
AN - SCOPUS:84862778613
VL - 9
SP - 27
EP - 33
JO - Quaternary Geochronology
JF - Quaternary Geochronology
SN - 1871-1014
ER -