摘要
本文计算了1980年10月末至11月中旬欧洲大西洋沿岸一次阻塞过程的波数域能量收支,详细考查了超长波(纬向波数1—3波)和天气尺度波(4—10波)能量平衡过程与阻塞形势建立、维持和崩溃的关系。结果表明,控制阻塞过程的超长波动能主要来自斜压有效位能的转换和天气尺度波动能的非线性串级输送;超长波有效位能主要来自纬向平均有效位能的转换,而天气尺度波有效位能向超长波非线性串级输送对阻塞形成也有重要作用。
The energy budget in the wave-number domain is calculated for an Atlantic-Europe blocking process during October to November 1980. The relationship is exam-ined in detail between the energy evolution of ultra-long waves (wavenumber 1-3)and synoptic-scale waves (wavenumber 4-10) and the foundation, maintenance andbreakdown of the blocking high. Results indicate that the kinetic energy of ultra-longwaves controlling the blocking originates mainly from the conversion of baroclinic avail-able potential energy and the nonlinear cascade transfer of the kinetic energy of synoptic-scale waves while the available potential energy of ultra-long waves mainly from theconversion of the zonal mean available potential energy. The nonlinear interaction of thecomponents on different temporal scales also plays an important role in the foundationand maintenance of the blocking high.
出处
《南京气象学院学报》
CSCD
1992年第1期72-80,共9页
Journal of Nanjing Institute of Meteorology
基金
国家"七五"攻关项目75-09-01经费资助
