TY - JOUR A1 - Sherman, J. P. A1 - Sheridan, P. J. A1 - Ogren, J. A. A1 - Andrews, E. A1 - Hageman, D. A1 - Schmeisser, L. A1 - Jefferson, A. A1 - Sharma, S. T1 - A multi-year study of lower tropospheric aerosol variability and systematic relationships from four North American regions JO - Atmos. Chem. Phys. J1 - ACP VL - 15 IS - 21 SP - 12487 EP - 12517 Y1 - 2015/11/10 PB - Copernicus Publications SN - 1680-7324 UR - https://acp.copernicus.org/articles/15/12487/2015/ L1 - https://acp.copernicus.org/articles/15/12487/2015/acp-15-12487-2015.pdf DO - 10.5194/acp-15-12487-2015 ER -