Robertson et al 2001 Hypothesized Climate Forcing, Last 500 Years Robertson, A.; Overpeck, J.T.; Rind, D.; Mosley-Thompson, E.; Zielinski, G.A.; Lean, J.; Koch, D.; Penner, J.; Tegen, I.; Healy, R. Robertson, A. Overpeck, J.T. Rind, D. Mosley-Thompson, E. Zielinski, G.A. Lean, J. Koch, D. Penner, J. Tegen, I. Healy, R. earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 3) earth science/paleoclimate/climate forcing (longitude,null,null,degree east,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 4) earth science/paleoclimate/climate forcing (nitrous oxide,null,null,parts per billion,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,null,null,N,"for 1990, due to anthropogenic carbon emissions") earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,null,null,N,"for 1990, due to natural dust emissions") earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 2) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 7) earth science/paleoclimate/climate forcing (age,null,null,year Common Era,null,climate forcing,null,null,N,stratospheric (volcanic) aerosol optical depth) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,null,null,N,"for 1990, due to natural sulfate emissions") earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 5) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 8) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,null,null,N,"for 1990, due to anthropogenic sulfate emissions") earth science/paleoclimate/climate forcing (age,null,null,year Common Era,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 6) earth science/paleoclimate/climate forcing (carbon dioxide,null,null,parts per million,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (latitude,null,null,degree north,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 1) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,normalized,null,N,tropospheric aerosol emissions normalized to 1990 CE values; for Region 9) earth science/paleoclimate/climate forcing (methane,null,null,parts per billion,null,climate forcing,null,null,N,null) earth science/paleoclimate/climate forcing (aerosol optical depth,null,null,dimensionless,null,climate forcing,null,null,N,stratospheric (volcanic) aerosol optical depth) earth science/paleoclimate/climate forcing (Global>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 : Robertson, A. Investigator : Overpeck, J.T. Investigator : Rind, D. Investigator : Mosley-Thompson, E. Investigator : Zielinski, G.A. Investigator : Lean, J. Investigator : Koch, D. Investigator : Penner, J. Investigator : Tegen, I. Investigator : Healy, R. 2001-07-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/5789 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_natural_sulfate.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_anthro_sulfate.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/vai.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/regional_definitions.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/regional_emissions.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/trace_gas.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_total_dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_total_carbon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/readme_robertson2001.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_natural_sulfate.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_anthro_sulfate.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/vai.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/regional_definitions.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/regional_emissions.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/trace_gas.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_total_dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_total_carbon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/readme_robertson2001.txt English https://www.ncdc.noaa.gov/paleo/study/5789 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_natural_sulfate.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_anthro_sulfate.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/vai.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/regional_definitions.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/regional_emissions.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/trace_gas.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_total_dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/1990_total_carbon.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/robertson2001/readme_robertson2001.txt START YEAR: 1500 AD * END YEAR: 1997 AD -180 -90 180 90