TY - JOUR A1 - Mahowald, N. M. A1 - Ballantine, J. A. A1 - Feddema, J. A1 - Ramankutty, N. T1 - Global trends in visibility: implications for dust sources JO - Atmos. Chem. Phys. Discuss. J1 - ACPD VL - 7 IS - 1 SP - 3013 EP - 3071 Y1 - 2007/02/27 PB - Copernicus Publications SN - 1680-7367 UR - http://www.atmos-chem-phys-discuss.net/7/3013/2007/ L1 - http://www.atmos-chem-phys-discuss.net/7/3013/2007/acpd-7-3013-2007.pdf ER -