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利用美国伍兹霍尔海洋研究所客观分析海气通量项目提供的1985~2006年日平均的湍流热通量及相关基本变量数据,通过小扰动方法和相关分析,详细讨论了西北太平洋湍流热通量低频振荡强度的特征.结果表明:(1)西北太平洋潜热低频振荡强度的空间分布主要受海气比湿差低频振荡强度(△q′)和海气比湿差平均值(■)的空间分布影响;感热低频振荡强度的空间分布主要受海气温差低频振荡强度(△T′)的空间分布影响.(2)湍流热通量低频振荡强度冬季最强,夏季最弱.潜热低频振荡强度的季节变化受△q′强度季节变化、海表面风速低频振荡强度(U′)季节变化、■季节变化和风速平均值季节变化共同影响;感热低频振荡强度的季节变化主要受△T′强度季节变化和季节变化的影响.(3)20°N以北海域和热带西太平洋,潜热(感热)低频振荡主要受大气变量qa′(Ta′)和U′的影响,表现为海洋对大气强迫的响应;20°N以南的热带中东太平洋,qs′(Ts′)的变化对潜热(感热)的低频振荡也有较大影响.
Based on the daily average turbulent heat flux and related basic variables data from 1985 to 2006 provided by the Ocean University of Woods in the United States, a detailed analysis of the Northwest Pacific turbulent heat flux The results show that: (1) The spatial distribution of the low-frequency oscillation of the latent heat in the western North Pacific is mainly affected by the spatial frequency of the low-frequency oscillation (△ q ’) and the mean (2) The low-frequency oscillation intensity of turbulent heat flux is the strongest in winter and the weakest in summer.The spatial distribution of low-frequency oscillation intensity of sensible heat is mainly affected by the spatial distribution of low-frequency oscillation (△ T) Seasonal changes in intensity are affected by seasonal variation in Δq ’intensity and low-frequency oscillation intensity (U’) in sea surface wind speed. ■ Seasonal variation and wind-speed average are affected by seasonal changes. Seasonal changes in the low- (3) In the area north of 20 ° N and the tropical western Pacific, the low-frequency oscillation of latent heat (sensible heat) is mainly affected by the atmospheric variables qa ’(Ta’) and U ’ Sound, in response to the performance of marine Forcing; N 20 ° tropical south eastern Pacific, qs ’(Ts’) of the latent heat change (sensible heat) in the low-frequency oscillations have a greater impact.