Journal of Applied Meteorology最新文献_第10页

Polarimetric Tornado Detection 极化龙卷风探测

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2235.1

A. Ryzhkov, T. Schuur, D. Burgess, D. Zrnic

引用次数: 204

Variability of Drop Size Distributions: Noise and Noise Filtering in Disdrometric Data 液滴大小分布的可变性:非对称数据中的噪声和噪声滤波

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2222.1

Gyuwon Lee, I. Zawadzki

引用次数: 82

Spatial and Temporal Structure of the Urban Heat Island in Seoul 首尔城市热岛的时空结构

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2226.1

Yeon‐Hee Kim, Jong‐Jin Baik

引用次数: 290

Climatology of Mountain Venting–Induced Elevated Moisture Layers in the Lee of the Alps 阿尔卑斯山脉中部山区排气引起的高水汽层气候学

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2217.1

S. Henne, M. Furger, A. Prevot

引用次数: 72

Study of Planar Ice Crystal Orientations in Ice Clouds from Scanning Polarization Lidar Observations 基于扫描偏振激光雷达观测的冰云平面冰晶取向研究

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2223.1

V. Noel, K. Sassen

{"title":"Study of Planar Ice Crystal Orientations in Ice Clouds from Scanning Polarization Lidar Observations","authors":"V. Noel, K. Sassen","doi":"10.1175/JAM2223.1","DOIUrl":"https://doi.org/10.1175/JAM2223.1","url":null,"abstract":"This paper presents a study of the orientation of ice crystals in cirrus and midlevel clouds, based on the analysis of several cases of scanning polarization lidar observations. The maximum angle that crystals deviate from the horizontal plane is inferred at consecutive altitude levels by fitting angle-dependent measurements of the linear depolarization ratio and backscattered intensities to a theoretical model with a Gaussian distribution of tilt angles. The average deviation angle is linked to the angular variation of backscatter. A rare observation of so-called Parry-oriented columns is also given to highlight the different backscattering behavior with lidar angle. For planar crystals, two orientation modes are found that depend on cloud temperature. High-level cold (30°C) clouds show a maximum deviation angle of 1.0°, whereas for warmer (20°C) midlevel clouds this angle averages 2.0°. This difference is caused by variations in particle shape and fall attitude that depend on temperature, likely involving a transition from simple plates to more widely fluttering dendrites at the warmer temperatures. Polarization lidar scans are clearly uniquely suited for the study of ice crystal orientations in clouds.","PeriodicalId":15026,"journal":{"name":"Journal of Applied Meteorology","volume":"42 1","pages":"653-664"},"PeriodicalIF":0.0,"publicationDate":"2005-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79310114","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 121

Flow around a complex building: Experimental and large-eddy simulation comparisons 复杂建筑周围的流动:实验和大涡模拟比较

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2219.1

R. Calhoun, F. Gouveia, J. Shinn, S. Chan, D. Stevens, R. Lee, J. M. Leone

{"title":"Flow around a complex building: Experimental and large-eddy simulation comparisons","authors":"R. Calhoun, F. Gouveia, J. Shinn, S. Chan, D. Stevens, R. Lee, J. M. Leone","doi":"10.1175/JAM2219.1","DOIUrl":"https://doi.org/10.1175/JAM2219.1","url":null,"abstract":"A field program to study atmospheric releases around a complex building was performed in the summers of 1999 and 2000. The focus of this paper is to compare field data with a large-eddy simulation (LES) code to assess the ability of the LES approach to yield additional insight into atmospheric release scenarios. In particular, transient aspects of the velocity and concentration signals are studied. The simulation utilized the finite-element method with a high-fidelity representation of the complex building. Trees were represented with a canopy term in the momentum equation. Inflow and outflow conditions were used. The upwind velocity was constructed from a logarithmic law fitted to velocities obtained on two levels from a tower equipped with a 2D sonic anemometer. A number of different kinds of comparisons of the transient velocity and concentration signals are presented—direct signal versus time, spectral, Reynolds stresses, turbulent kinetic energy signals, and autocorrelations. It is concluded that the LES approach does provide additional insight, but the authors argue that the proper use of LES should include consideration of cost and may require an increased connection to field sensors; that is, higher-resolution boundary and initial conditions need to be provided to realize the full potential of LES.","PeriodicalId":15026,"journal":{"name":"Journal of Applied Meteorology","volume":"42 1","pages":"571-590"},"PeriodicalIF":0.0,"publicationDate":"2005-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73861796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

A Detailed Evaluation of GPCP 1° Daily Rainfall Estimates over the Mississippi River Basin 密西西比河流域GPCP 1°日降雨量估算的详细评估

Journal of Applied Meteorology Pub Date : 2005-05-01 DOI: 10.1175/JAM2233.1

M. Gebremichael, W. Krajewski, M. Morrissey, G. Huffman, R. Adler

引用次数: 56

Use of Salt Lake City URBAN 2000 Field Data to Evaluate the Urban Hazard Prediction Assessment Capability (HPAC) Dispersion Model 利用盐湖城URBAN 2000现场数据评价城市灾害预测评估能力(HPAC)分散模型

Journal of Applied Meteorology Pub Date : 2005-04-01 DOI: 10.1175/JAM2205.1

Joseph C. Chang, S. Hanna, Z. Boybeyi, P. Franzese

{"title":"Use of Salt Lake City URBAN 2000 Field Data to Evaluate the Urban Hazard Prediction Assessment Capability (HPAC) Dispersion Model","authors":"Joseph C. Chang, S. Hanna, Z. Boybeyi, P. Franzese","doi":"10.1175/JAM2205.1","DOIUrl":"https://doi.org/10.1175/JAM2205.1","url":null,"abstract":"After the terrorist incidents on 11 September 2001, there is a greatly heightened concern about the potential impacts of acts of terrorism involving the atmospheric release of chemical, biological, radiological, and nuclear (CBRN) materials in urban areas. In response to the need for an urban CBRN model, the Urban Hazard Prediction Assessment Capability (Urban HPAC) transport and dispersion model has been developed. Because HPAC is widely used by the Department of Defense community for planning, training, and operational and tactical purposes, it is of great importance that the new model be adequately evaluated with urban datasets to demonstrate its accuracy. This paper describes evaluations of Urban HPAC using the “URBAN 2000” urban tracer and meteorological field experiment data from Salt Lake City, Utah. Four Urban HPAC model configuration options and five plausible meteorological input data options—ranging from data-sparse to data-rich scenarios—were considered in the study, thus leading to a total of 20 possible model combinations. For the maximum concentrations along each sampling arc for each intensive operating period (IOP), the 20 Urban HPAC model combinations gave consistent mean overpredictions of about 50%, with a range over the 20 model combinations from no overprediction to a factor-of-4 overprediction in the mean. The median of the random scatter for the 20 model combinations was about a factor of 3 of the mean, with a range over the 20 model combinations between a factor of about 2 and 9. These performance measures satisfy previously established acceptance criteria for dispersion models.","PeriodicalId":15026,"journal":{"name":"Journal of Applied Meteorology","volume":"20 1","pages":"485-501"},"PeriodicalIF":0.0,"publicationDate":"2005-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85113141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 36

A Bulk Microphysics Parameterization with Multiple Ice Precipitation Categories 多冰降水类别的整体微物理参数化

Journal of Applied Meteorology Pub Date : 2005-04-01 DOI: 10.1175/JAM2211.1

J. Straka, E. Mansell

引用次数: 107

Total surface area estimates for individual ice particles and particle populations 对单个冰粒子和粒子群的总表面积估计

Journal of Applied Meteorology Pub Date : 2005-04-01 DOI: 10.1175/JAM2209.1

C. Schmitt, A. Heymsfield

引用次数: 18