Global Holocene and Last Glacial Maximum Dust Flux Data Lambert, F.; Tagliabue, A.; Shaffer, G.; Lamy, F.; Winckler, G.; Farias, L.; Gallardo, L.; De Pol-Holz, R. Lambert, F. Tagliabue, A. Shaffer, G. Lamy, F. Winckler, G. Farias, L. Gallardo, L. De Pol-Holz, R. earth science/paleoclimate/climate reconstructions (age,null,null,month of year,null,climate reconstructions,null,null,N,null) earth science/paleoclimate/climate reconstructions (longitude,null,null,degree east,null,climate reconstructions,null,null,N,null) earth science/paleoclimate/climate reconstructions (latitude,null,null,degree north,null,climate reconstructions,null,null,N,null) earth science/paleoclimate/climate reconstructions (dust,null,null,kilogram per square meter per second,null,climate reconstructions,null,null,N,null) earth science/paleoclimate/climate forcing (Global>LATITUDE >LONGITUDE ) Mineral dust aerosols play a major role in present and past climates. To date, we rely on climate models for estimates of dust fluxes to calculate the impact of airborne micronutrients on biogeochemical cycles. Here we provide a new global dust flux data set for Holocene and Last Glacial Maximum (LGM) conditions based on observational data. A comparison with dust flux simulations highlights regional differences between observations and models. By forcing a biogeochemical model with our new data set and using this model's results to guide a millennial-scale Earth System Model simulation, we calculate the impact of enhanced glacial oceanic iron deposition on the LGM-Holocene carbon cycle. On centennial timescales, the higher LGM dust deposition results in a weak reduction of <10 ppm in atmospheric CO2 due to enhanced efficiency of the biological pump. This is followed by a further ~10 ppm reduction over millennial timescales due to greater carbon burial and carbonate compensation. STUDY NOTES: Global interpolated dust fluxes for the Holocene and Last Glacial Maximum (LGM) NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Lambert, F. Investigator : Tagliabue, A. Investigator : Shaffer, G. Investigator : Lamy, F. Investigator : Winckler, G. Investigator : Farias, L. Investigator : Gallardo, L. Investigator : De Pol-Holz, R. 2015-08-11 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/19100 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/readme-lambert2015dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/dustflux.nc https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/dustflux.nc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/readme-lambert2015dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/dustflux.nc https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/dustflux.nc.txt English https://www.ncdc.noaa.gov/paleo/study/19100 https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/readme-lambert2015dust.txt https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/dustflux.nc https://www1.ncdc.noaa.gov/pub/data/paleo/climate_forcing/lambert2015/dustflux.nc.txt Fabrice Lambert, Alessandro Tagliabue, Gary Shaffer, Frank Lamy, Gisela Winckler, Laura Farias, Laura Gallardo, and Ricardo De Pol-Holz2015Dust fluxes and iron fertilization in Holocene and Last Glacial Maximum climatesGeophysical Research Letters42146014-602310.1002/2015GL064250http://onlinelibrary.wiley.com/doi/10.1002/2015GL064250/abstract START YEAR: 21000 cal yr BP * END YEAR: 0 cal yr BP -180 -90 180 90