Meteorologische Zeitschrift最新文献_第9页

Mesoscale wind patterns over the complex urban terrain around Stuttgart investigated with dual-Doppler lidar profiles 用双多普勒激光雷达剖面图研究了斯图加特周围复杂城市地形的中尺度风型

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-04-22 DOI: 10.1127/METZ/2020/1029

Niklas Wittkamp, B. Adler, N. Kalthoff, O. Kiseleva

{"title":"Mesoscale wind patterns over the complex urban terrain around Stuttgart investigated with dual-Doppler lidar profiles","authors":"Niklas Wittkamp, B. Adler, N. Kalthoff, O. Kiseleva","doi":"10.1127/METZ/2020/1029","DOIUrl":"https://doi.org/10.1127/METZ/2020/1029","url":null,"abstract":"The flow in the atmospheric boundary layer (ABL) over cities is crucial for the urban climate as it controls the exchange of heat, moisture and pollutants within the ABL and with the surroundings. In particular for cities in mountainous terrain, the mesoscale flow shows a high spatial and temporal variability, which poses great challenges to the means of observation. We used the dual-Doppler lidar scan strategy of virtual towers (VT), to measure profiles of the horizontal wind in the ABL over the city of Stuttgart in southwestern Germany. To study the mesoscale variability of the horizontal wind, we placed six VTs in the topographically structured investigation area, which is characterised by a basin-shaped valley opening into a major valley. Comparisons with radiosonde data show that reliable wind information can be retrieved from the VT measurements after careful processing. A statistical analysis reveals a strong dependence of the flow in the valleys below ridge height on the bulk Richardson number (BRN). A critical BRN of 1.25 is identified for the area, below which the flow below ridge height is dynamically unstable and coupled to the ambient flow above. For BRNs greater than 1.25, the flow is dynamically stable and the flow below ridge height is dominated by thermally driven down-valley winds, which are decoupled from the ambient wind. This study shows that the VT technique is applicable in highly complex terrain and a promising tool for the investigation of the flow in areas which are difficult to access by traditional in situ or single lidar measurements, like complex urban terrain.","PeriodicalId":49824,"journal":{"name":"Meteorologische Zeitschrift","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47454011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 7

Cb‑Fusion – forecasting thunderstorm cells up to 6 hours Cb‑Fusion–预测雷暴单元长达6小时

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-04-22 DOI: 10.1127/METZ/2020/1047

Jingmin Li, C. Forster, J. Wagner, T. Gerz

{"title":"Cb‑Fusion – forecasting thunderstorm cells up to 6 hours","authors":"Jingmin Li, C. Forster, J. Wagner, T. Gerz","doi":"10.1127/METZ/2020/1047","DOIUrl":"https://doi.org/10.1127/METZ/2020/1047","url":null,"abstract":"As a severe weather phenomenon, thunderstorms can cause casualties and economic loss to the human society. A reliable forecast of these weather events would help to avoid or at least mitigate this damage. To date, the forecasting of thunderstorms however is still a challenge, especially for lead times of one hour and beyond. In this study we present a methodology to forecast deep-convection for several hours lead time: Cb-Fusion estimates the likelihood of thunderstorm occurrence for up to 6 hours in advance over a part of Central Europe, using a data fusion technique that blends data of multiple sources from observations, nowcasts, and numerical weather predictions with a high update rate. The Cb-Fusion is set up to operate in near real time. The skill of Cb-Fusion is evaluated based on 1743 hours of thunderstorm observations collected during the months April to October, 2019. Three categories of thunderstorm size have been distinguished: ‘large’ for a coverage area larger than 5000 km2, ‘medium’ for a coverage area between 5000 km2 and 500 km2, and ‘small’ for a coverage area smaller than 500 km2. Compared to thunderstorm forecasts from numerical models alone, the combination of data from various sources by Cb-Fusion results in a significantly better forecast skill. The study reveals that the forecast is reliable for up to 3 hours lead time for ‘medium’ and ‘large’ scale thunderstorms (median POD of 0.6 – 0.9) but little skill is found for ‘small’ scale thunderstorms and lead times between 3 and 6 hours (median POD of 0.05). It is argued that Cb-Fusion provides meaningful improvements in forecasting thunderstorms for various users.","PeriodicalId":49824,"journal":{"name":"Meteorologische Zeitschrift","volume":"30 1","pages":"169-184"},"PeriodicalIF":1.2,"publicationDate":"2021-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49539814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Barrel of Ilmenau: A large-scale convection experiment to study dust devil-like flow structures. 伊尔梅瑙桶:研究尘暴状气流结构的大尺度对流实验。

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-03-17 DOI: 10.1127/metz/2020/1046

Alice Loesch, Ronald du Puits

引用次数: 1

Papers from the DACH 2019 conference at Garmisch-Partenkirchen 来自Garmisch-Partenkirchen的DACH 2019会议的论文

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-03-17 DOI: 10.1127/METZ/2021/1067

Stefan Emeis

{"title":"Papers from the DACH 2019 conference at Garmisch-Partenkirchen","authors":"Stefan Emeis","doi":"10.1127/METZ/2021/1067","DOIUrl":"https://doi.org/10.1127/METZ/2021/1067","url":null,"abstract":"The seventh triennial joint conference of the three national meteorological societies (DMG, ÖGM, SGM) of Germany, Austria and Switzerland, DACH2019, took place in Garmisch-Partenkirchen from March 18th until 22nd, 2019. The convention site was the municipal congress building in the city center of Garmisch-Partenkirchen. The conference was attended by about 480 participants who presented nearly 200 talks and about 150 posters. The local organization was headed by the Munich Section of the German Meteorological Society (DMG) which was supported by the German Aerospace Center (DLR), the German Meteorological Service (DWD), Munich University (LMU), the Karlsruhe Institute of Technology (KIT), and two colleagues from ÖGM and SGM. Earlier editions of these conferences (DACH2007 in Hamburg, DACH2010 in Bonn, and DACH2013 in Innsbruck) have already been covered in Special Issues of Meteorologische Zeitschrift (Behr et al., 2008; Hense et al., 2012; Mayer et al., 2014). The very first conference in this series was held in Vienna in 2001, followed by the second one in Karlsruhe in 2004. The previous, sixth conference took place in Berlin in 2016. Following the overall concept of these triennial joint conferences to offer a forum for the scientific activities of all members of the three meteorological societies, the scientific program was organised in 17 sessions covering a broad range of topics:","PeriodicalId":49824,"journal":{"name":"Meteorologische Zeitschrift","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-03-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45022717","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Salutation to the 30th anniversary of “Meteorologische Zeitschrift/Contributions to Atmospheric Sciences” 向“气象杂志/对大气科学的贡献”30周年致敬

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-03-17 DOI: 10.1127/METZ/2021/1076

H. Pichler, H. Richner, M. Kerschgens

引用次数: 0

Analysis and numerical simulation of a waterspout at the Hong Kong International Airport 香港国际机场水龙卷的分析及数值模拟

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-01-01 DOI: 10.1127/metz/2021/1078

P. Chan, K. Hon, P. Robinson, K. Kosiba, J. Wurman, Q.S. Li

{"title":"Analysis and numerical simulation of a waterspout at the Hong Kong International Airport","authors":"P. Chan, K. Hon, P. Robinson, K. Kosiba, J. Wurman, Q.S. Li","doi":"10.1127/metz/2021/1078","DOIUrl":"https://doi.org/10.1127/metz/2021/1078","url":null,"abstract":"The wind ﬁeld of a waterspout that occurred near the Hong Kong International Airport was documented using dual-Doppler analysis from a dense network of Doppler Light Detection and Ranging (LIDAR) systems operated at the airport, and nearby surface weather station observations. The dual-Doppler winds are used in tandem with surface observations to analyze the wind structure of the waterspout. The performance of a numerical weather prediction system simulating the windshift line and the associated vortices is compared to the observations. The waterspout and the other vortices formed along a windshift line (convergence between the arriving northeast monsoon and background westerly/sea breeze) and were rather weak, with the surface wind gusting to about 10 m/s. However, the dense network of meteorological sensors at the airport provided unprecedented surface sampling of these vortices. The numerical model captured the convergence line and the vortices reasonably well and may provide earlier alerting to the aviation weather forecasters about the possible occurrence of small waterspout-type vortices near the airport, which may have implications to aviation safety.","PeriodicalId":49824,"journal":{"name":"Meteorologische Zeitschrift","volume":" ","pages":""},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44040885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Variation of leading-edge-erosion relevant precipitation parameters with location and weather type 前缘侵蚀相关降水参数随地点和天气类型的变化

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-01-01 DOI: 10.1127/METZ/2021/1063

Anna-Maria Tilg, M. Hagen, F. Vejen, C. Hasager

引用次数: 3

Measurements of spatial variability of sub-micron particle number concentrations perpendicular to a main road in a built‑up area 在建成区垂直于主干道的亚微米粒子数浓度的空间变异性测量

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-01-01 DOI: 10.1127/metz/2021/1058

Sabine Fritz, S. Schubert, Christoph Schneider

引用次数: 1

Smartmet nowcast – Rapidly updating nowcasting system at Finnish Meteorological Institute Smartmet临近预报-芬兰气象研究所快速更新的临近预报系统

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-01-01 DOI: 10.1127/metz/2021/1070

L. Hieta, Mikko Partio, M. Laine, Marja-Liisa Tuomola, H. Hohti, T. Perttula, E. Gregow, Jussi Ylhaisi

引用次数: 0

Observing the pre-convective environment and convection initiation with Doppler Lidar and cloud radar in the Al Hajar Mountains of the United Arab Emirates 用多普勒激光雷达和云雷达观测阿拉伯联合酋长国Al Hajar山脉对流前环境和对流开始

IF 1.2 4区地球科学

Meteorologische Zeitschrift Pub Date : 2021-01-01 DOI: 10.1127/metz/2021/1100

Oliver Branch, A. Behrendt, Osama Alnayef, F. Späth, T. Schwitalla, M. Temimi, M. Weston, Sufian Farrah, Omar Al Yazeedi, Siddharth Tampi, Karel de Waal, V. Wulfmeyer

引用次数: 0