Law Dome, Antarctica High Resolution 1999-2009 10Be Data, Revised Dating Pedro, J.B.; Heikkilä, U.; Klekociuk, A.; Smith, A.M.; van Ommen, T.D.; Curran, M.A.J. Pedro, J.B. Heikkilä, U. Klekociuk, A. Smith, A.M. van Ommen, T.D. Curran, M.A.J. earth science/paleoclimate/ice cores (ice age,null,null,year Common Era,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (delta 18O,bulk ice,null,per mil VSMOW,null,ice cores,null,null,N,null) earth science/paleoclimate/ice cores (10Be,bulk ice,null,null,null,ice cores,null,null,N,atom per milligram) earth science/paleoclimate/ice cores (10Be,bulk ice,one standard error,null,null,ice cores,null,null,N,atom per milligram) earth science/paleoclimate/ice core (Law Dome>LATITUDE -66.73>LONGITUDE 112.83) Cosmogenic 10Be measured in polar ice cores has important application in the reconstruction of past solar activity. However, the processes controlling its atmospheric transport and deposition to the ice sheets are not fully understood. Here we use the seasonal changes in 10Be concentrations in a 10 year monthly resolved ice core record from the Law Dome site (East Antarctica) in conjunction with ECHAM5-HAM general circulation model (GCM) simulations of 10Be and 7Be deposition as tools to examine this problem. Maximum 10Be concentrations are observed in the ice core during the austral late summer to early autumn (summer-autumn), while minimum concentrations are observed during the austral winter. The GCM simulations, corroborated by earlier observations of 10Be:7Be ratios in Antarctica from the Georg von Neumayer air sampling station, suggest that the 10Be concentration maximum is linked to direct input of stratospheric 10Be from the Antarctic stratosphere to the lower levels of the Antarctic troposphere during the austral summer-autumn. This result contrasts with the modeled transport of 10Be to Greenland, where the seasonal maximum in stratospheric input is seen in the late winter to spring, synchronous with the timing of the seasonal maximum in midlatitude stratosphere to troposphere exchange. Our results suggest that a different combination of processes is responsible for the transport of 10Be to the Antarctic and Greenland ice sheets. STUDY NOTES: Revised dating from Pedro et al., J. Geophys. Res., 2011. Reference for the original data: Pedro et al., Climate of the Past 7:707 This record comprises composite 10Be concentrations from three Law Dome ice cores (DSS0506-core, DSS0809-core and DSS0910-core). Sample dating is revised from that presented in Pedro et al., 7, 707-721, 2011 by accounting for sub-seasonal variability in snow accumulation. The accumulation record was derived from the European Center for Medium-Range Weather Forecasts Interim Reanalysis (ERA-Interim). See Appendix 1 of Pedro et al., J. Geophys. Res. 116, D23120, 2011 for details of method. Note: All measurements are calibrated to the NIST SRM 4325 10Be standard reference material, utilising the Nishiizumi et al. (2007) 10Be:9Be ratio of (2.79 +/- 0.02) x 10^(-11) NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Pedro, J.B. Investigator : Heikkilä, U. Investigator : Klekociuk, A. Investigator : Smith, A.M. Investigator : van Ommen, T.D. Investigator : Curran, M.A.J. 2012-11-07 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/13565 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2011-10be-composite-revised.txt https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2011-10be-composite-revised.txt English https://www.ncdc.noaa.gov/paleo/study/13565 https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2011-10be-composite-revised.txt Pedro, J.B., U.E. Heikkila, A. Klekociuk, A.M. Smith, T.D. van Ommen, and M.A.J. Curran. 2011. Beryllium-10 transport to Antarctica: Results from seasonally resolved observations and modeling. Journal of Geophysical Research (Atmospheres), Vol. 116, D23120. DOI: 10.1029/2011JD016530 START YEAR: 1999 AD * END YEAR: 2009 AD 112.83 -66.73 112.83 -66.73