摘要
本文利用1987和1974两个EINina年2°×2°格点COADS资料,计算了30°S-30°N热带太平洋面感热、潜热、有效长波辐射、射入太阳辐射通量及热量收支,得出:EINino和LaNina期间洋面热交换的差异主要发生在赤道洋面,厄瓜多尔和秘鲁西部洋面最为明显;EINino期间,赤道洋面感热和潜热交换加强,有效长波辐射和太阳辐射减弱,洋面净获得(损失)热量减少(增加);LaNina期间,赤道洋面感热和潜热交换减弱,有效长波辐射和太阳辐射增强,洋面净获得(损失)热量增加(减少)。最后概括出一个EINino和LaNina循环的海—气热交换机制模型,并估计得出EINino和LaNina循环的周期约为4年。
2°×2°mean monthly COADS grid data in E1 Nino and La Nina years of 1987 and 1974 are used to compute the fluxes of net longwave radiation, sensible and latent heats, solar radiation and heat budget on the tropical Pacific surface (30°S-30°N). The differences of the heat fluxes between E1 Nino and La Nina mainly occurred on the equatorial ocean surface, especially the area to the west coast of Ecuador and Peru. During E1 Nino, the sensible and latent heat exchange increased, the net longwave radiation and incident solar radiation decreased and the gain (loss) of heat reduced (increassed) on the ocean surface. During La Nina, the circumstances were opposite. Finally an ideal model of sea-air heat exchange mechanism for the E1 Nino-La Nina cycle is summarized and its four-year period of cycle is obtained from the estimattion of heat exchange on ocean surface.
出处
《南京大学学报（自然科学版）》
CAS
CSCD
1993年第1期135-145,共11页
Journal of Nanjing University（Natural Science）
