A regional modeling study of the diurnal cycle in the lower troposphere in the south-eastern tropical Pacific
A regional modeling study of the diurnal cycle in the lower troposphere in the south-eastern tropical Pacific
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东南热带太平洋对流层低层昼夜循环的区域模拟研究
DOI：
10.1007/s00382-012-1598-3
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发表时间：
2012
期刊：
影响因子：
4.6
通讯作者：
Toniazzo T
中科院分区：
文献类型：
--
作者：
Toniazzo T
我们研究了南美陆地及其山脉对东南热带太平洋（SEP）邻近地区平均环流的显着循环日和半日成分的影响。我们的方法基于国家环境预测中心的最终分析业务分析数据所强制进行的区域大气模型天气研究和预测的大量数值模拟。在控制仿真中，模型域覆盖了SEP和南美洲的大部分地区。在一些敏感性实验中，范围被缩小以逐渐排除大陆地区。我们发现平均昼夜周期对模型域敏感，揭示了源自智利和秘鲁陆地的不同贡献的存在。实验表明，南太平洋地区环流和热结构的日变化（主要是受局部日照影响）受到安第斯山脉秘鲁部分对流的影响，而大部分干燥的山风环流则迫使一个额外的成分，导致海岸附近的半日变化。然而，一系列数值测试揭示了模拟对垂直网格选择的敏感性，限制了对跨域的昼夜和半日分量的幅度和相位进行可靠定量陈述的可能性。
We examine the influence of the South-American land-mass and its mountains on the significant cyclic diurnal and semidiurnal components of the average circulation in the adjacent area of the southeastern tropical Pacific (SEP). Our approach is based on a number of numerical simulations with the regional atmospheric model weather research and forecasting forced by the National Centers for Environmental Prediction’s final analysis operational analysis data. In the control simulation the model domain covers the SEP and a large part of South America. In several sensitivity experiments the domain is reduced to progressively exclude continental areas. We find that the mean diurnal cycle is sensitive to model domain in ways that reveal the existence of different contributions originating from the Chilean and Peruvian land-masses. The experiments suggest that diurnal variations in circulations and thermal structures over the SEP (mainly forced by local insolation) are influenced by convection over the Peruvian sector of the Andes cordillera, while the mostly dry mountain-breeze circulations force an additional component that results in semi-diurnal variations near the coast. A series of numerical tests, however, reveal sensitivity of the simulations to the choice of vertical grid, limiting the possibility of solid quantitative statements on the amplitudes and phases of the diurnal and semidiurnal components across the domain.
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南太平洋反气旋、秘鲁层积云和南美季风系统之间的联系
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
Ma;C. Mechoso;H. Xiao;C.;Y. Xue;F. Sales
通讯作者：
F. Sales
影响因子：
--
作者：
R. Muñoz
通讯作者：
R. Muñoz
影响因子：
3.2
作者：
Chen, F;Dudhia, J
通讯作者：
Dudhia, J
影响因子：
3.2
作者：
Garreaud, RD;Rutllant, J
通讯作者：
Rutllant, J