1969—2024年青藏高原降雹日数时空变化特征
冯晓莉, 赵占秀, 王鹤, 张红亮, 张欣, 管琴, 葛友荣

Spatiotemporal variations of hail days over the Qinghai-Xizang Plateau from 1969 to 2024
FENG Xiaoli, ZHAO Zhanxiu, WANG He, ZHANG Hongliang, ZHANG Xin, GUAN Qin, GE Yourong
图9 1969—2024年青藏高原0 ℃层高度(a)、-20 ℃层高度(b)、0 ℃层与-20 ℃层间厚度(c)的年际变化及其与降雹日数的21 a滑动相关系数序列(d)
Fig.9 Interannual variations of the 0 ℃ isotherm height (a), the -20 ℃ isotherm height (b), the vertical thickness between the 0 ℃ and -20 ℃ levels (c), and their 21-year sliding correlation coefficients with hail days (d) over the Qinghai-Xizang Plateau during 1969-2024