TY - JOUR A1 - Zang, Z. A1 - Hao, Z. A1 - Li, Y. A1 - Pan, X. A1 - You, W. A1 - Li, Z. A1 - Chen, D. T1 - Background error covariance with balance constraints for aerosol species and applications in variational data assimilation JO - Geosci. Model Dev. J1 - GMD VL - 9 IS - 8 SP - 2623 EP - 2638 Y1 - 2016/08/10 PB - Copernicus Publications SN - 1991-9603 UR - https://gmd.copernicus.org/articles/9/2623/2016/ L1 - https://gmd.copernicus.org/articles/9/2623/2016/gmd-9-2623-2016.pdf DO - 10.5194/gmd-9-2623-2016 ER -