Cosmogenic Radionuclides Atmospheric Transport Model Output 
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               World Data Center for Paleoclimatology, Boulder 
                                  and 
                     NOAA Paleoclimatology Program 
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NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! 


NAME OF DATA SET: 
Cosmogenic Radionuclides Atmospheric Transport Model Output 

LAST UPDATE: 7/2010 (Original receipt by WDC Paleo) 
CONTRIBUTORS: Heikkilä, U. and J. Beer. 
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2010-063 

WDC PALEO CONTRIBUTION SERIES CITATION: 
Heikkilä, U. and J. Beer.  2010. 
Cosmogenic Radionuclides Atmospheric Transport Model Output. 
IGBP PAGES/World Data Center for Paleoclimatology 
Data Contribution Series # 2010-063. 
NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. 


ORIGINAL REFERENCES: 
Heikkilä, U. and A.M. Smith. 2012.
Influence of model resolution on the atmospheric transport of 10Be.
Atmospheric Chemistry and Physics, 12, 10601-10612.
doi:10.5194/acp-12-10601-2012, 2012.  

Heikkilä, U., J. Beer, J. Feichter, V. Alfimov, H.-A. Synal, 
U. Schotterer, A. Eichler, M. Schwikowski, and L. Thompson. 2009. 
36Cl bomb peak: comparison of modeled and measured data. 
Atmospheric Chemistry and Physics, Vol. 9, pp. 4145-4156. 
doi:10.5194/acp-9-4145-2009. 

Heikkilä, U., J. Beer, and J. Feichter. 2008. 
Modeling cosmogenic radionuclides 10Be and 7Be during the 
Maunder Minimum using the ECHAM5-HAM General Circulation Model. 
Atmospheric Chemistry and Physics, 8, 2797-2809. 
doi:10.5194/acp-8-2797-2008. 
 
Heikkilä, U. 2007. 
Modeling of the atmospheric transport of the cosmogenic radionuclides 
10Be and 7Be using the ECHAM5-HAM general circulation model. 
PhD Thesis, ETH Zurich, available at 
http://e-collection.ethbib.ethz.ch/view/eth:30179?q=heikkilä 


GEOGRAPHIC REGION: Global 
PERIOD OF RECORD: 1705-1709 AD, 1952-1972 AD, 1986-1990 AD, 1998-2003 AD 

FUNDING SOURCES: NCCR Climate, Swiss National Science Foundation, 
German Computer Center (DKRZ) (computing time). 



DESCRIPTION: 
Model results for the atmospheric transport of cosmogenic radionuclides 
Be-10, Be-7, Cl-36 performed using the ECHAM5-HAM general circulation 
model, developed at the Max-Planck-Institute for Meteorology 
(http://www.mpimet.mpg.de/). Please refer to Heikkilä, U. and J. Beer, 
in preparation, for a detailed description of the data.


Data from the following experiments is available: 

1) The simulated bomb test peak of Chlorine-36 during the years 
   1952-1972. See Heikkilä et al. 2009. 

Available files: 
cl36_air_conc_1952-1972_monthly.nc 
- monthly mean Cl-36 atmospheric concentrations (atoms/kg) 
  at 39 model levels up to 0.01 hPa (ca. 80 km). 
  (Note: large file, 329MB) 
  (Note: data for March 1959 are not present in this file) 


cl36_flux_1952-1972_monthly.nc 
cl36_flux_1952-1972_annual.nc 
- monthly and annual mean Cl-36 atmospheric deposition fluxes (atoms/m2/s). 


2) Simulated atmospheric deposition fluxes of Beryllium-10, Beryllium-7 
   and Lead-210 for two different periods: 1986-1990 (present day conditions) 
   and 1705-1709 (Maunder Minimum of the Little Ice Age). 
   See Heikkilä et al. 2008. More information on the simulation of Lead-210 
   can be found in Heikkilä 2007. 

Available files: 
be10_be7_pb210_flux_1986-1990_monthly.nc 
be10_be7_pb210_flux_1986-1990_annual.nc 
be10_be7_pb210_flux_1705-1709_monthly.nc 
be10_be7_pb210_flux_1705-1709_annual.nc 
 
- monthly and annual mean atmospheric deposition fluxes (atoms/m2/s) 
  of Be-10, Be-7 and Pb-210 and the total precipitation rate (mm/day). 

3) Simulated atmospheric deposition fluxes of Beryllium-10 
   and Beryllium-7 for the period of 1998-2003. Publication in preparation. 

Available files: 
be10_be7_flux_1998-2003_monthly.nc 
be10_be7_flux_1998-2003_annual.nc 

- monthly and annual mean atmospheric deposition fluxes (atoms/m2/s) 
  of Be-10 and Be-7 and the total precipitation rate (mm/day). 

When using any of this data please cite: 
Heikkilä, U. and J. Beer, in preparation. 

Model output is in netCDF format (http://www.unidata.ucar.edu/software/netcdf/)