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MO Jiaqi * WANG Hui LIN Wantao LIN Yihua. Anhui Normal University Wuhu China. Division of Computional Science E-Institute of Shanghai Universities Shanghai Jiaotong University Shanghai China. Chinese Academy of Meteorological Sciences Beijing China. State Laboratory of Numerical Modeling for Atmospheric Sciences Geophysical Fluid Dynamics Institute of Atmosheric Physics Chinese Academy of Sciences Beijing China 《海洋学报(英文版)》2005,(5)
1 IntroductionThe El Ni’o atmospheric physics oscillation is anabnormal phenomenon involved in the tropical Pacificocean- atmosphere interactions. Studies on the El Ni(ophenomenon are very attractive (Lin et al., 2000; Linet al., 2001, 2002; Wang, 2001; Feng et al., 2001;Feng et al., 2002; Liu et al., 2002; Wei and Chen,2003; Xie et al., 2002; Zhu et al., 2002; Pu et al.,2003; Gu et al., 2004; Yu and Liu, 2004). Lin and Mo(2004), Mo and Lin (2004) and Mo et al. (2004) alsostudied a s… 相似文献
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目的：探讨益气和胃胶囊联合八段锦治疗慢性胃炎（CG）伴焦虑、抑郁的疗效及其对炎症因子、免疫功能等的影响。方法：选取100 例CG伴焦虑、抑郁的患者为研究对象,按随机数字表法将其分为2组,每组各50 例。对照组行西医常规治疗,治疗组在对照组基础上加用益气和胃胶囊联合八段锦治疗。比较2组综合疗效、焦虑自评量表（SAS）和抑郁自评量表（SDS）评分、患者免疫功能和炎症因子指标变化、不良反应及治疗后6个月生活质量。结果：总有效率治疗组为96.00%（48/50）,对照组为72.00%（36/50）,2组比较,差异有统计学意义（P＜0.01）;治疗前2组SAS与SDS评分、免疫功能及炎症因子指标比较,差异均无统计学意义（P＞0.05）,治疗后2组SAS、SDS评分较治疗前均明显下降,且治疗组治疗后SAS、SDS评分低于对照组,差异均有统计学意义（P＜0.01）;治疗后2组CD3+、CD4+和CD4+/CD8+水平较治疗前显著提高,且治疗组升高幅度优于对照组,差异均有统计学意义（P＜0.05）;治疗后2组白细胞介素（IL）-6、IL-7及转化生长因子（TGF）-β1水平较治疗前显著降低,且治疗组降低幅度大于对照组（P＜0.05或P＜0.01）;不良反应发生率治疗组为2.00%（1/50）,对照组为20.00%（10/50）,2组比较,差异有统计学意义（P＜0.01）;出院后6个月随访,生活质量（QOL-100）评分治疗组高于对照组,差异有统计学意义（P＜0.01）。结论：在CG伴焦虑、抑郁的西医常规治疗基础上加用益气和胃胶囊联合八段锦治疗可改善患者焦虑、抑郁症状,提高免疫功能和生活质量,减少炎症反应和不良反应,值得临床推广。 相似文献
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雷电是电荷聚集到一定程度的放电现象,当雷暴云中电荷累积,在地面附近大气就会有相应的感应电场,因此通过大气电场脉冲波形变化,结合雷达回波资料,可以判断雷暴云的发展阶段。本文分析了2010年8月11~12日陕西省有闪电定位监测网络以来最强的一次雷电天气过程。该过程全省范围内共发生闪电23 570次,8月11日单日闪电14 470次,整个过程以负闪为主,闪电频数高,同时伴随强降水发生。分析发现,此次强雷电天气过程与大气环境场具有以下对应关系:强雷电的发生与西太平洋副热带高压强盛控制陕西大部分地区且呈东西带状分布、西风槽东移南压关系密切;另外还与潜在对流性稳定度指数、抬升指数、能量场和位势稳定度具有较好的相关性;高雷电密度区域与区域性暴雨的强降水落区有一定的对应关系,但强雷电往往先于强降水出现,雨量最大区域与雷电强度最大区域并不对应。 相似文献
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During the period of 3—5 August 1996(for short "96.8"),an extraordinary rainstorm event occurred in Henan,Hebei and Shanxi Provinces in China,resulting in severe flood catastrophe.Synoptic analyses indicated that the stable gross col field and the interaction between a northward moving typhoon(down into low pressure)and its east lateral Pacific subtropical high were the large-and meso-scale circulation conditions of the "96.8" extraordinary rainstorm.The mesoscale typhoon-low and its specific dynamical and thermodynamical structures were directly related to this rainstorm event.The nonhydrostatic version of mesoscale numerical model MM5 was used to conduct investigation of numerical simulation for this case.The simulation with the full physical processes of nonhydrostatic version MM5 was basically possessed of a capability to reproduce the genesis,development and evolution of the large-scale and meso-α scale synoptic systems.The simulative results using a two-way interactive nesting procedure revealed that the typhoon-low was possessed of an intensive coupled mechanism between the dynamical and thermodynamical fields,namely,the developing typhoon-low was possessed of a structure of the.cyclonic vorticity column with warm center and high humidity,the vorticity column on the lower levels was the moist convective instability and negative moist potential vorticity structure:the intensive ascending vertical motion and the intense divergence on upper levels and intensive convergence on the lower levels as well as the development of the convective cloud cluster were intercoupling:the intense southern wind jet companied by the typhoon-low was not only the interaccompanying and intercoupling condition of the development and maintenance of the typhoon-low and convective cloud cluster,but also was the transportable belt of the moisture source and heat energy of the "96.8" extraordinary rainstorm.The analysis of simulative results of precipitation indicated that the distribution of the rainfall belt and rainfall rate was basically consistent with that of the observation in spite of some rainfall centers less or larger than those of the observation for coarse or fine mesh domain,respectively. 相似文献
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Jean-Baptiste?RenardEmail author Martyn?P.?Chipperfield Gwena?l?Berthet Fabienne?Goffinont-Taupin Claude?Robert Michel?Chartier Howard?Roscoe Wuhu?Feng Emmanuel?Rivière Michel?Pirre 《Journal of Atmospheric Chemistry》2005,51(1):65-78
Eleven vertical profiles of stratospheric NO3 have been obtained since 1992 using the AMON and SALOMON balloon-borne UV-visible spectrometers. The measurements are compared to the SLIMCAT 3D model and calculations based on the steady-state hypothesis for NO3. The calculations cannot reproduce some parts of the profiles which exhibit strong concentration fluctuations over few kilometres, as a consequence of the dependence of NO3 on local temperature variations. A statistical use of the data allows us to estimate the influence of the temperature dependence of the absorption cross-section on the data analysis, and the validity of the recommended reaction rates available in the literature. Discrepancies exist between the model based on recommended kinetics and observations at warmer temperatures. Nevertheless, the analysis is biased by local temperature inhomogeneities, and only a low-resolution vertical shape of the NO3 profiles can be retrieved. 相似文献
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“96·8”特大暴雨和中尺度系统发展结构的非静力数值模拟 总被引：11，自引：0，他引：11
1996年 8月 3～ 5日 (“96· 8”) ,中国河南、山西、河北等省发生了一次特大暴雨过程 ,造成了严重洪涝灾害。文中的天气分析指出 ,稳定的大型鞍形场和北移台风 (登陆后减弱为低压 )与其东侧副热带高压的相互作用是“96· 8”特大暴雨发生的大、中尺度环流条件 ;而中尺度低压及其特有的动力热力结构与该暴雨过程直接相关。对该过程采用非静力中尺度数值模式 (MM5)进行了数值模拟研究。模拟结果分析发现 ,非静力 (MM5)的全物理过程模拟基本上可再现大尺度和中 -α尺度天气系统的发生、发展和演变。采用二重网格双向嵌套技术的细网格模拟结果揭示 ,低压的动力场和热力场之间具有一种强耦合机制 ,即发展的低压具有气旋性涡柱的暖心高湿结构 ,在涡柱低空是湿对流不稳定和负湿位涡结构 ;强垂直上升运动与高空强辐散和低空强辐合以及对流云团的发展互耦 ;与低压相伴的强南风急流不仅是低压和对流云团发展与维持的互伴互耦条件 ,而且也是“96· 8”特大暴雨的水汽源和热能输送带。降水模拟结果分析表明 ,尽管某些降水中心对粗网格偏小 ,对细网格偏大 ,但雨带和雨强分布与观测结果基本一致。 相似文献
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以2011年西安世界园艺博览会(简称世园会)的入园客流数量和逐日气象资料为基础,以最高温度、平均风速和平均相对湿度为定量解释变量,以降水、节假日、每一天和月份为虚拟解释变量,引入随机误差项的AR(2)结构,通过逐步优化的建模思想,构建了2011年西安世园会入园客流的气象计量经济模型。以该模型为核心,以网络技术和数据库技术为基础,构建世园会入园客流数量预测的气象服务业务化系统。2011年8月底至10月22日,气象部门和世园会管理层同时开展了基于网络的业务化应用,运用逐日温度和降水等天气预报信息,结合入园票务政策变化、优惠措施出台、指定日特别活动等信息,联合开展对逐日、未来一段时间和整个运营期的可能入园客流数量的定量预测,为世园执委会部署和控制客流数量、确保世园会安全运营提供重要参考依据。结论表明,气象计量经济学模型能很好地解释气象因素、节假日、每一天以及不同月份变化对入园客流的影响,准确模拟入园客流数量的逐日与逐月变化特征,能较好地预测未来两周的入园客流人数。在8月提前两个月准确预测出西安世园会可能入园客流总人数逾1600万人,与实际人数约1573万很接近。 相似文献