A Regional Ocean–Atmosphere Model for Eastern Pacific Climate: Toward Reducing Tropical Biases*
A Regional Ocean–Atmosphere Model for Eastern Pacific Climate: Toward Reducing Tropical Biases*
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DOI：
10.1175/jcli4080.1
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发表时间：
2007-04
影响因子：
4.9
通讯作者：
S. Xie;T. Miyama;Yuqing Wang;Haiming Xu;S. D. de Szoeke;R. Small;K. Richards;T. Mochizuki
中科院分区：
文献类型：
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作者：
S. Xie;T. Miyama;Yuqing Wang;Haiming Xu;S. D. de Szoeke;R. Small;K. Richards;T. Mochizuki
摘要 热带太平洋是一个重要的气候区域，是厄尔尼诺现象和南方涛动的发源地。气候模拟对于全球海洋-大气耦合模型来说仍然是一个挑战，这些模型存在很大的偏差，特别是在再现观测到的赤道上海面温度（SST）和降雨量的经向不对称性方面。盆地海洋环流模型与全物理区域大气模型相结合，研究东太平洋气候过程。区域海洋大气模式（ROAM）再现了东太平洋气候的显着特征，包括北移的热带辐合带（ITCZ）与高海温纬向带、东南热带太平洋的低云层、赤道冷舌及其年循环。模拟的低云甲板在垂直结构和云量方面经历了显着的季节性变化；云变得解耦并通过稳定层与表面混合层分离......
Abstract The tropical Pacific Ocean is a climatically important region, home to El Nino and the Southern Oscillation. The simulation of its climate remains a challenge for global coupled ocean–atmosphere models, which suffer large biases especially in reproducing the observed meridional asymmetry across the equator in sea surface temperature (SST) and rainfall. A basin ocean general circulation model is coupled with a full-physics regional atmospheric model to study eastern Pacific climate processes. The regional ocean–atmosphere model (ROAM) reproduces salient features of eastern Pacific climate, including a northward-displaced intertropical convergence zone (ITCZ) collocated with a zonal band of high SST, a low-cloud deck in the southeastern tropical Pacific, the equatorial cold tongue, and its annual cycle. The simulated low-cloud deck experiences significant seasonal variations in vertical structure and cloudiness; cloud becomes decoupled and separated from the surface mixed layer by a stable layer in...