The Construction and Quantitative Study of Upper - Level Trough Strength Index
ZHANG Yinghua,SHANG Kezheng,WANG Shigong,LI Deshuai,YE Peilong
Journal of Arid Meteorology . 2014, (2): 169 -174 .  DOI: 10. 11755/j. issn. 1006 -7639(2014) -02 -0169