Since space plasmas are colisionless, reliable space weather simulations will require to take into account a full kinetic description of their dynamics. The Particle in Cell (PIC) method is a particle-mesh technique that e ciently allows such description. Still, realistic plasma simulations require huge data sets and are computationally expensive. High scalability must thus be achieved in order...

In order to evaluate pulse compression for use in phased array weather radar systems, modifications to the TimeSeries Weather Radar Simulator have been made which incorporate phase-coding into its functionality. This allows for evaluating the performance of various pulse compression schemes under controlled conditions. In this study, a 5-bit Barker code has been integrated into the TSWRS along ...

山岳域の天候変動を特徴付ける雲・霧・強雨や降雪の発現に関する統計的傾向を明らかにした研究例は日本では少ない。本研究では，長野県菅平高原（標高1,320 m）に設置された現在天気計（バイサラ社）で2010年11月から2020年10月にかけ取得したデータを使用し，視程により区分される霧と靄，降水形態，降雨強度の季節変化・日変化の特徴を明らかにした。靄は霧に比べて高頻度で出現し，両者とも夜間に頻度が増加した。霧は春季・秋季に，靄は夏季に頻度が増加した。これに比べて，長野地方気象台（標高418 m）では，靄は寒候期・早朝に増加傾向が見られた。降雪とみぞれは日中に発生頻度が低下した。みぞれの発生はまれで，12月と3月に南岸低気圧・二つ玉低気圧通過時に出現しやすかった。非常にまれであるが，過冷却水滴が集中して観測される期間が存在した。強い降雨の頻度は7-9月，夕方に増加する傾向があり，中程度もし...

We report on an ongoing effort to build a Dynamic Data Driven Application System (DDDAS) for short-range forecast of weather and wildfire behavior from real-time weather data, images, and sensor streams. The system changes the forecast as new data is received. We encapsulate the model code and apply an ensemble Kalman filter in timespace with a highly parallel implementation. In this paper, we ...

It is well known that for Doppler radars transmitting uniformly spaced pulses there is a coupling between the maximum unambiguous range and velocity. That is, one can only be increased at the expense of a proportional decrease of the other. Because this fundamental limitation hinders observation of severe weather phenomena, the Radar Operations Center of the US National Weather Service has unde...

The purpose of our research deals with the description of a methodology for the definition of specific weather sequences and their influence on the energy needs of HVAC system. We’ll apply the method on the tropical Reunion Island. The methodological approach based on a detailed analysis of weather sequences leads to a classification of climatic situations that can be applied to the site. These...

MHD-based global space weather models have mostly been developed and maintained at academic institutions. While the "free spirit" approach of academia enables rapid emergence testing new ideas methods, lack long-term stability support makes this arrangement very challenging. This paper describes a successful example university-based group, Center Space Environment Modeling (CSEM) University Mic...

Background: The role of temperature changes, as an environmental risk factor, in the human health status has been investigated in recent studies. Accordingly, the present two-year study was conducted to evaluate the incidence of myocardial infarction (MI) in warm and cold seasons in Ali-ibn Abi Talib Hospital, Rafsanjan, Iran. Materials and Methods: In this descriptive and cross-sectional st...

Neural networks have been in use in numerous meteorological applications including weather forecasting. Neural Networks have been used as an effective method for solving many problems in a wide range of application areas. As Neural Networks are being more and more widely used in recent years, the need for their more formal definition becomes increasingly apparent. This paper presents a novel ar...