Mechanisms initiating deep convection over complex terrain during COPS
Mechanisms initiating deep convection over complex terrain during COPS
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COPS期间复杂地形上引发深层对流的机制
DOI：
10.1127/0941-2948/2008/0348
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发表时间：
2008
影响因子：
1.2
通讯作者：
E. Richard
中科院分区：
文献类型：
--
作者：
Kottmeier;N. Kalthoff;U. Corsmeier;Ch. Barthlott;J. Van Baelen;A. Behrendt;R. Behrendt;A. Blyth;R. Coulter;S. Crewell;M. Dorninger;C. Flamant;Th. Foken;M. Hagen;C. Hauck;H. Höller;H. Konow;M. Kunz;H. Mahlke;S. Mobbs;E. Richard
本文研究了中等地形山区的对流起动问题，着重讨论了边界层和对流层中高层强迫机制对对流起动的影响。研究中使用的数据来自2007年夏季在德国西南部和法国东部进行的COPS（对流和地形诱导降水研究）。结果表明，降水对流的产生可大致分为：（i）地面加热和低层气流辐合;（ii）地面加热和水汽供应克服了潜在和/或潜在不稳定期间的对流抑制;（iii）中尺度辐合线和强迫平均垂直运动引起的对流层中层动力过程。这些现象必须在模式中得到充分的体现，以提高定量降水预报。对选定的COPS病例进行分析，并将其分为艾德这些初始类别。虽然只有一个子集的COPS数据（主要是无线电探空仪，地面气象站，雷达和卫星数据）在这里使用，它表明，对流系统捕捉到相当详细的传感器协同作用。多普勒雷达在几小时后触发深对流的位置观测到辐合线。结果表明，在许多情况下，观测辐合线的位置和时间将有助于对流的临近预报。此外，如果潜在对流气团在变化的地形特征上的平流起着主要作用，那么对流开始的预报就非常复杂。一个锋面结构经过孚日-莱茵河河谷-黑森林地形时，伴随着宽莱茵河河谷上空对流的中等抑制。在更远的下游，由于差异表面加热、辐合线和阵风锋产生的气流，在黑森林上空观察到对流增强。
Precipitating convection in a mountain region of moderate topography is investigated, with particular em- phasis on its initiation in response to boundary-layer and mid- and upper-tropospheric forcing mechanisms. The data used in the study are from COPS (Convective and Orographically-induced Precipitation Study) that took place in southwestern Germany and eastern France in the summer of 2007. It is found that the initiation of precipitating convection can be roughly classif ed as being due to either: (i) surface heating and low-level f ow convergence; (ii) surface heating and moisture supply overcoming convective inhibition during latent and/or potential instability; or (iii) mid-tropospheric dynamical processes due to mesoscale convergence lines and forced mean vertical motion. These phenomena have to be adequately represented in models in order to improve quantitative precipitation forecast. Selected COPS cases are analysed and classif ed into these initiation categories. Although only a subset of COPS data (mainly radiosondes, surface weather stations, radar and satellite data) are used here, it is shown that convective systems are captured in considerable detail by sensor synergy. Convergence lines were observed by Doppler radar in the location where deep convection is triggered several hours later. The results suggest that in many situations, observations of the location and timing of convergence lines will facilitate the nowcasting of convection. Further on, forecasting of the initiation of convection is signif cantly complicated if advection of potentially convective air masses over changing terrain features plays a major role. The passage of a frontal structure over the Vosges – Rhine valley – Black Forest orography was accompanied by an intermediate suppression of convection over the wide Rhine valley. Further downstream, an intensif cation of convection was observed over the Black Forest due to differential surface heating, a convergence line, and the f ow generated by a gust front.
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DOI：
10.1175/2008bams2367.1
发表时间：
2008-10
期刊：
--
影响因子：
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作者：
V. Wulfmeyer;A. Behrendt;H. Bauer;C. Kottmeier;U. Corsmeier;A. Blyth;G. Craig;U. Schumann;M. Hagen;S. Crewell;P. Girolamo;C. Flamant;M. Miller;A. Montani;S. Mobbs;E. Richard;M. Rotach;M. Arpagaus;H. Russchenberg;P. Schlüssel;M. König;V. Gärtner;R. Steinacker;M. Dorninger;D. Turner;T. Weckwerth;A. Hense;C. Simmer
通讯作者：
V. Wulfmeyer;A. Behrendt;H. Bauer;C. Kottmeier;U. Corsmeier;A. Blyth;G. Craig;U. Schumann;M. Hagen;S. Crewell;P. Girolamo;C. Flamant;M. Miller;A. Montani;S. Mobbs;E. Richard;M. Rotach;M. Arpagaus;H. Russchenberg;P. Schlüssel;M. König;V. Gärtner;R. Steinacker;M. Dorninger;D. Turner;T. Weckwerth;A. Hense;C. Simmer
弗莱堡-绍因斯兰地区示踪剂的传输和扩散建模
DOI：
--
发表时间：
2000
期刊：
影响因子：
--
作者：
F. Fiedler;I. Bischoff;N. Kalthoff;G. Adrian
通讯作者：
G. Adrian
影响因子：
1.2
作者：
F. Aoshima;A. Behrendt;H. Bauer;V. Wulfmeyer
通讯作者：
F. Aoshima;A. Behrendt;H. Bauer;V. Wulfmeyer
MAP 再分析对 MAP IOP2a 对流系统数值模拟的影响
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
F. Lascaux;E. Richard;C. Keil;O. Bock
通讯作者：
O. Bock
由于局部循环系统的变化而在山谷中产生自由对流
DOI：
--
发表时间：
2008
期刊：
影响因子：
--
作者：
R. Eigenmann
通讯作者：
R. Eigenmann