Usoskin et al. 2008 2,000 Year Cosmic Ray Induced Ionization Reconstruction Usoskin, I.G.; Korte, M.; Kovaltsov, G.A. Usoskin, I.G. Korte, M. Kovaltsov, G.A. earth science/paleoclimate/climate forcing (cosmic ray-induced ionization,null,null,count per gram per second,null,climate forcing,averaged,null,N,decadal averages; units are ion pairs per gram per second) earth science/paleoclimate/climate forcing (age,null,null,year Common Era,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (Northern Hemisphere>LATITUDE >LONGITUDE ) Records of changes in solar irradiance, volcanic aerosols, atmospheric trace gases, and other properties thought to influence climate in the past. Parameter keywords describe what was measured in this data set. Additional summary information can be found in the abstracts of papers listed in the data set citations. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Usoskin, I.G. Investigator : Korte, M. Investigator : Kovaltsov, G.A. 2008-02-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/6100 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/solar_variability/usoskin2008crii.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/solar_variability/usoskin2008crii.txt English https://www.ncdc.noaa.gov/paleo/study/6100 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/solar_variability/usoskin2008crii.txt START YEAR: 5 AD * END YEAR: 2005 AD -180 0 180 90