TY - JOUR A1 - Ravi Kant Pathak A1 - Wai Shing Wu A1 - Tao Wang T1 - Summertime PM2.5 ionic species in four major cities of China: nitrate formation in an ammonia-deficient atmosphere JO - Atmos. Chem. Phys. Discuss. J1 - ACPD VL - 2008 SP - 11487 EP - 11517 Y1 - 2008/06/11 PB - Copernicus Publications SN - 1680-7375 UR - https://acp.copernicus.org/preprints/8/11487/2008/ L1 - https://acp.copernicus.org/preprints/8/11487/2008/acpd-8-11487-2008.pdf DO - 10.5194/acpd-8-11487-2008 ER -