Evolution mechanism of the western Pacific subtropical high

来源 :Science in China(Series D:Earth Sciences) | 被引量 : 0次 | 上传用户:jeaceinter
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
To surmount the deficiency in studying the multiple equilibrium states in the atmosphere motion with highly truncated spectral method, the trigonometric functions for describing the proto-typical 500 hPa height fields and the outgoing long wave radiation (OLR) fields are retrieved re-spectively for the northward bias and the southward bias years of the western Pacific subtropical high with corresponding observational data and the optimum subset retrieval method for four fac-tors. Then the evolution mechanism of the western Pacific subtropical high is studied by means of multiple equilibrium state theory. The results show that the cause of inducing the abnormal location of the western Pacific subtropical high is differences in the early external thermal forcing, which evoke different waveforms in atmosphere. If the early meridional and zonal external thermal forcing differences are stronger, there are wave-mean flow and wave-wave interactions between the response waveforms in atmosphere. In such a case, the western Pacific subtropical high shifts northward obviously. On the contrary, when the early meridional and zonal external thermal forcing differences are weaker, there is no wave-mean flow interaction between the response waveforms in atmosphere, and accordingly the position of the western Pacific subtropical high oscillates with the external thermal forcing oscillation, and is on the south of normal. To surmount the deficiency in studying the multiple equilibrium states in the atmosphere motion with highly truncated spectral method, the trigonometric functions for describing the proto-typical 500 hPa height fields and the outgoing long wave radiation (OLR) fields are retrieved re-spectively for the northward bias and the southward bias years years of the western Pacific subtropical high with corresponding observational data and the optimum subset retrieval method for four fac-tors. Then the evolution mechanism of the western Pacific subtropical high is studied by means of multiple equilibrium state theory. The results show that the cause of inducing the abnormal location of the western Pacific subtropical high is differences in the early external thermal forcing, which evoke different waveforms in atmosphere. If the early meridional and zonal external thermal forcing differences are stronger, there are waves-mean flow and wave-wave interactions between the response waveforms in atmosphere On such a case, the western Pacific subtropical high shifts northward obviously. On the contrary, when the early meridional and zonal external thermal forcing differences are weaker, there is no wave-mean flow interaction between the response waveforms in atmosphere, and accordingly the position of the western Pacific subtropical high oscillates with the external thermal forcing oscillation, and is on the south of normal.
其他文献
The oysters ( Saccostrea cuculiata ) were collected from four stations around Xiamen Island (Lundu Port, Xinglin Bay, Tong“ an Bay, Huangcuo). The relation be
统计分析表明,在服用纺织品、装饰用纺织品和产业用纺织品这三大类纺织品中,今年受金融危机影响最小的是产业用纺织品,而且在未来具有更为广阔发展空间的也是产业用纺织品。
前不久,喀什市召开兑现2007年外贸出口奖励基金会议,对推动对外贸易经济发展的24家企业进行重奖,兑现奖励基金760余万元。喀什市紧紧围绕将喀什市建设成面向中亚的区域性商贸
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
基于省际面板数据的实证模型,本文揭示了中国劳动收入份额在短期经济波动(包括产出波动和价格波动)中的一般特征。研究显示,劳动收入份额在产出波动中具有显著的“逆周期”性
梯度硬质合金结合了高硬度与高韧性的优异特性,成为近年来该领域的研究热点。对经渗碳处理的添加有(Ti,Ta)C的梯度硬质合金进行了详细分析。采用金相显微镜、X-射线光电子能
利用正交实验法对Al0.6Fe0.25Cu合金冷拉拔导线固溶和时效工艺参数进行优化,并对处理前后的组织和性能进行了研究。结果表明,在优先保证电导率并兼顾抗拉强度及伸长率的原则
针对中厚板轧制过程头尾部分温度差的变化规律进行分析,基于可逆轧制特点,计算不同道次头尾轧制时间和间隙时间的变化特点,重点研究厚度对头尾温度差的影响,得知,对于薄规格
采用两步阳极氧化法在不同的电解液体系和阳极氧化模式下构建钛表面多级孔氧化层.对样品的表面组成、结构和形貌等表面特性进行了表征.通过对MG63细胞在多级孔表面共培养来评价其对成骨细胞粘附、增殖和分化的影响.结果表明:两步阳极氧化法可以在钛表面制备出兼具生物活性和微米/亚微米多级孔结构的晶型TiO2层;与喷砂酸蚀钛表面相比,经两步阳极氧化处理的钛表面更有利于细胞的附着、生长和促进细胞的增殖.
对Mg-3%Zn-0.5%Zr(质量分数)合金在模拟体液(SBF)中的腐蚀行为和电化学行为进行了深入研究,并采用浸提液法评价其体外细胞毒性.结果表明:Mg-3Zn-0.5Zr合金在SBF中快速发生腐蚀反应,生成致密的Mg(OH)2膜层,浸泡5d后合金表面出现轻微腐蚀凹坑,但并未随时间延长而拓展,与此同时开路电位曲线出现微小波动,合金失重量开始迅速增加,12d后凹坑得到修复,表面Ca-P沉积物增多,