Seasonal and Interannual Variabilities of the Pacific Ocean Circulation and Their Relevance to ENSO

太平洋环流的季节和年际变化及其与 ENSO 的相关性

• 批准号: 63460046
• 负责人: YAMAGATA Toshio
• 金额: $ 4.35万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-63460046/
• 关键词: Gcm; Costa Rica Dome; Mindanao Dome; Itcz; Monsoon; ENSO現象; エル・ニ-ニョ; アジア・モンス-ン; ミンダナオ・ド-ム; コスタ・リカ・ド-ム; 季節風; 黒潮; コスタ・リカ・ドーム; IG力学; PG渦; TG渦; 熱帯収束帯(ITCZ); ENSO

We have investigated temporal and spatial variabilities of the ocean circulation in the Pacific using a high resolution general circulation model (GCM) forced by the observed winds with idealized surface heat fluxes. The following are major conclusions from the numerical simulations.(1) The Costa Rica Dome with a cyclonic circulation grows rapidly in late spring and matures in summer and early fall in accord with the northward migration of the ITCZ. In winter strong northerns converging the southernmost ITCZ excite warm anticyclonic warm eddies, which erode the Costa Rica Dome. The Costa Rica Dome can be maintained by the winds with the cyclonic curl in summer only when the embryo of a cyclonic eddy is preconditioned in winter and early spring.(2) The Mindanao Dome evolves in late fall off the Philippine coast due to local upwellinhs when a positive curl associated witn the northeast Asian winter monsoon increases over the region. After reaching a maximum in winter it begins to decay in spring due to an intrusion of downwelling long Rossby waves excited in winter by the northeast trade winds farther eastward near 160 -E, as well as a retreat of the local positive wind stress curl. The seasonal variation of the model Mindanao Dome is almost perfectly determined by the change of the wind field in the western Pacific west of the date line.

我们已经使用高分辨率的一般循环模型（GCM）（GCM）被观察到的具有理想化的表面热通量的风能强迫的高分辨率通用循环模型（GCM）研究了太平洋海洋循环的时间和空间变化。以下是数值模拟的重大结论。（1）哥斯达黎加圆顶在春末迅速增长，并根据ITCZ的北向迁移而在夏季和初期成熟。在冬季，强烈的北部融合了最南端的ITCZ激发了温暖的反气旋温暖涡流，这侵蚀了哥斯达黎加的圆顶。哥斯达黎加圆顶只有在夏季的旋风卷发才能保持风风，只有在冬季和早春的胚胎胚胎在冬季和早春进行了预处理。在冬季达到最大值后，由于冬季向东北贸易激动的距离向东的长长的波斯比（Rossby）波动的侵入，春季开始衰落，东北贸易风格在160 -e附近，以及当地正风压力卷曲的撤退。模型棉兰老巨人的季节性变化几乎是由日期西部西太平洋西部的风场的变化完美决定的。

项目成果

Mssumoto, Y: "The effect of the seasonal cycle of the basic fields on an evolution of ENSO (in Japanese)" Marine Science Monthly. 21. 497-501 (1989)

Mssumoto, Y：“基本场的季节循环对 ENSO 演变的影响（日语）”《海洋科学月刊》。

Masumoto,Y.: "The birth and evolution of an eastward propagating airーsea coupled disturbance in an aqua planet" Meteorol.Atmos.Phys.(1990)

Masumoto, Y.：“水生行星中向东传播的气海耦合扰动的诞生和演化”Meteorol.Atmos.Phys.(1990)

Umatani, S: "The Response of the Easten Tropical Pacific to Meridional Migration of the ITCZ : the Generation of the Costa Rica Dome" J. Phys. Oceanogr. 21. (1991)

Umatani, S：“东热带太平洋对 ITCZ 经向迁移的响应：哥斯达黎加穹顶的生成”J. Phys。

Umatani,S.: "The Response of the Eastern Tropical Pacific to Meridional Migration of the ITCZ:the Generation of the Costa Rica Dome" J.PhyS.Oceanogr.21. (1991)

Umatani,S.：“东热带太平洋对 ITCZ 经向迁移的响应：哥斯达黎加圆顶的生成”J.PhyS.Oceanogr.21。

Masumoto, Y: "The effect of Basic Easterlies on an Evolution of ENSO (in Japanese)" Bull. Res. Inst. Appl. Mech. Kyushu Univ.68. 39-46 (1989)

Masumoto, Y：“基本东风带对 ENSO 演变的影响（日语）”公牛。