大气科学2012，Vol.36Issue(2)：259-270,12.DOI:10.3878/j.issn.1006-9895.2011.11046
东太平洋冷舌区海表面温度日变化特征的模拟研究
The Simulation Study of the Features of Diurnal Variation of Sea Surface Temperature in the Eastern Pacific Cold Tongue
摘要
Abstract
The features of diurnal variation of sea surface temperature (SST) are simulated in the LASG/IAP Climate System Ocean Model (LICOM) by resolving the diurnal variation of solar radiation and the influence of weak mixing is investigated. Forced by the ideal diurnal variation of solar radiation, some features of diurnal variation of SST can be captured in LICOM with 10-m vertical resolution in the upper layers. The diurnal variation of solar radiation also results in diurnal variation of currents in the upper layers. The horizontal distribution of diurnal amplitude of simulated SST is consistent with that of observed SST and modulated by the diurnal amplitude of solar radiation. In the eastern Pacific cold tongue, the diurnal amplitude of simulated SST is about 0. 3°~ 0. 4℃ and 0. 1°C- 0. 2℃, smaller than that of observations. The peak of daily SST variation appears during 1500 - 1600 LST and lags 2-3 hours than the peak time of daily solar radiation, which is close to observation. After reducing mixing, the diurnal amplitude of SST variation increases in the equatorial eastern Pacific cold tongue, closer to observation. This indicates that the features of diurnal variation in the equatorial eastern Pacific cold tongue are mainly controlled by the diurnal variation of solar radiation and vertical mixing. After reducing mixing, under the modulation of solar radiation, the mean states including the mixed layer depth, temperatures and currents are obviously changed. In the northern part of the eastern Pacific cold tongue, the reduced mixing causes heat accumulation in the upper layers and then leads to an increase in SST about 0. 3℃. While in the southern part, the enhanced meridional advection leads to a decrease in SST about 0. 2℃.关键词
海表面温度(SST)日变化/模拟/混合/东太平洋冷舌Key words
diurnal variation of sea surface temperature (SST) / simulation/ mixing/ eastern Pacific cold tongue分类
天文与地球科学引用本文复制引用
林鹏飞,刘海龙,章丽娜,张学洪..东太平洋冷舌区海表面温度日变化特征的模拟研究[J].大气科学,2012,36(2):259-270,12.基金项目
国家重点基础研究发展规划项目2010CB950502,国家自然科学基金资助项目40906012,优秀国家重点实验室研究项目41023002,中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室自由探索,中国科学院战略性先导资助项目XDA05110302,国家高技术研究发展计划2010AA012303 （）
