ESTIMATION OF PREDICTIVE POTENTIAL OF QUASI-BIENNOAL OSCILLATION (QBO) CYCLICAL STRATOSPHERIC CIRCULATION IN TROPICAL ZONE FOR LONG-TERM PRECIPITATION FORECAST Article Hmeesh W.H., Mohanad Ismael Khalbas A.J. ICASEA 2021 - 3rd 2021 International Conference on Advance of Sustainable Engineering and its Application. Institute of Electrical and Electronics Engineers Inc.. 2021. P. 141-146