10.6084/m9.figshare.5738562.v1 Dan Westervelt Dan Westervelt GFDL precip data figshare 2017 aerosol climate Atmospheric Aerosols 2017-12-28 02:26:26 Dataset https://figshare.com/articles/dataset/GFDL_precip_data/5738562 GFDL data