环流

In section one, by using FICE scheme and TIME-GCM, a model of trace gases and OH airglow affected by gravity wave is set up, then the propagation of nonlinear gravity wave and the effect on trace gases and OH airglow are analyzed. The result shows gravity wave excited by tropospause forcing can propagate stably to the mesosphere through the stratosphere so that energy and momentum can be transferred from one region to another. In this process, gravity wave undergoes growth, overturning, convection and breaking. And the no-isothermal structure can accelerate the breaking of gravity wave in mesospause, and the breaking of gravity wave is an important source of convection and small-scale waves.

在第一部分的工作中，利用全隐欧拉格式和全球热层-电离层-中间层-电动力学环流耦合模式，对重力波的非线性传播及其在传播过程中对中高层大气中氧族和氢族成分和与之密切相关的OH气辉辐射的影响进行了数值模拟，结果表明，从对流层向上传播的重力波经历了产生、发展、饱和、对流产生直至破碎的非线性演化，大气的非等温结构加速了重力波在中层顶区的破碎，重力波的非线性传播是小尺度对流和湍流产生的一个重要的源。

In section one, by using FICE scheme and TIME-GCM, a model of trace gases and OH airglow affected by gravity wave is set up, then the propagation of nonlinear gravity wave and the effect on trace gases and OH airglow are analyzed. The result shows gravity wave excited by tropospause forcing can propagate stably to the mesosphere through the stratosphere so that energy and momentum can be transferred from one region to another. In this process, gravity wave undergoes growth, overturning, convection and breaking. And the no-isothermal structure can accelerate the breaking of gravity wave in mesospause, and the breaking of gravity wave is an important source of convection and small-scale waves. The propagation of gravity wave will affect the distribution of minor species.

在第一部分的工作中，利用全隐欧拉格式和全球热层-电离层-中间层-电动力学环流耦合模式，对重力波的非线性传播及其在传播过程中对中高层大气中氧族和氢族成分和与之密切相关的OH气辉辐射的影响进行了数值模拟，结果表明，从对流层向上传播的重力波经历了产生、发展、饱和、对流产生直至破碎的非线性演化，大气的非等温结构加速了重力波在中层顶区的破碎，重力波的非线性传播是小尺度对流和湍流产生的一个重要的源。

Based on the Arctic 1°×1° sea-ice area index,500hPa heights,sea surface pressure and the China 160 Stations temperature data,the relationship between the interdecadal variation of sea-ice in Davis Strait and the atmospheric circulation is discussed by statistical analysis methods.

利用北极1°×1°海冰面积指数、海平面气压、500hPa高度场和中国160站气温等资料，运用统计分析方法讨论了戴维斯海峡海冰的长期变化趋势、年代际变化及其与大气环流的关系。

This flow is sometimes referred to as the South Atlantic Current to distinguish it from the much cooler Southern Ocean Current which extends ENE from Drake Passage and continues to the E passing S of South Africa into the South Indian and Pacific Oceans as a circumpolar current.

这个海流有时被叫做南大西洋洋流，以此来区别它和更冷的南大样洋流（后者从Drake航道并继续到正东向延伸，同时经过南非到达南印度洋和太平洋，从而完成环流）。

Thereinto, the sea-ice extent of Weddell Sea and Ross Sea regions extends and area increases, while the sea-ice extent of the other three regions shrinks and area decreases.

南极海冰时空变化特征的研究对进一步认识南极地区海冰气相互作用的物理过程，讨论南极海冰变异与大气环流和天气气候的关系有重要意义

These experimental results indicate that the improved plug-in repeative control scheme combining with the circumfluence R.M.S. compensation method are feasible for inverts parallel operation,which will meet the demand of power single-phase invert-paralleling systems.

实验结果表明，对于单相逆变器并联系统，本文提出的改进型嵌入式重复控制策略以及基于环流有效值的均流补偿策略是可行的，可以满足大功率单相逆变器并联的要求。

Greenland sea ice ; summer surface air temperature ; summer rainfall ; general circulation

格陵兰海冰；夏季气温；夏季降水；大气环流

In April and June, the abnormal climate in Taiwan is associated with the low-level circulation anomalies over the South China Sea, the East China Sea, the Philippine Sea and the western margin of the western Pacific.

在环流和温度的关系方面，台湾偏冷时低层有北风距平，偏暖时则有南风距平；而高层的南北风距平对於台湾的温度异常似乎并不重要。

If the active convection over the Philippine Sea is not associated with the deep troughs, then northwest Australia tends to be dry.

和类型二相比，类型七在菲律宾海上也有低压环流，然而尺度较小。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。