Journal of Atmospheric and Solar-Terrestrial Physics最新文献_第9页

New observation and analysis of window damage as evidence for energy and power content of ball lightning 作为球状闪电能量和功率含量证据的窗户损坏新观测和分析结果

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-07-11 DOI: 10.1016/j.jastp.2024.106300

Karl D. Stephan

引用次数: 0

An empirical model for prediction of centimeter wave attenuation during haze event considering particle humidity and charge 考虑颗粒湿度和电荷的灰霾事件中厘米波衰减预测经验模型

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-07-11 DOI: 10.1016/j.jastp.2024.106296

Tian-Li Bo , Xiao-Hua Yang , Zhi-Mei Huang

{"title":"An empirical model for prediction of centimeter wave attenuation during haze event considering particle humidity and charge","authors":"Tian-Li Bo , Xiao-Hua Yang , Zhi-Mei Huang","doi":"10.1016/j.jastp.2024.106296","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106296","url":null,"abstract":"<div>In order to ensure the operation of wireless communication and radar equipment during haze events, it is necessary to study the quantitative prediction of the attenuation coefficient of Electromagnetic wave (α) during haze events. The results of the dimensional analysis show that particle humidity (Hp) and particle charge-to-mass ratio (Qm) are two important parameters that affect the propagation of electromagnetic waves. At the micro level, the influence of two parameters is introduced into the electromagnetic wave attenuation model through the core-shell structure. The results show that the Hp and Qm will increasing α. Due to it being difficult to obtain the physical parameters in the micro-scale model by experimental methods. Therefore, this article analyzes the experimental data of Zhang et al. (2020b) and finds out that the change of α can be scaled by Hp, and Qm mainly affects the slope term of the linear change of α with Hp. Based on these findings, an empirical model of α considering Hp and Qm was proposed. The results show that the influence of Hp and Qm during haze events with high humidity cannot be ignored. And, the relative humidity has the largest contribution to α, the particle charging has the second place, and the primary release of particulate matter has the smallest contribution. The advantage of this model is that it is not only simple in form and easy to apply, but also that the input required and model parameters can be measured with experimental methods.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106296"},"PeriodicalIF":1.8,"publicationDate":"2024-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141605034","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

Untangling the role of convective and circulation features on multi-scales in modulating tracks of tropical cyclones formed over the Bay of Bengal 厘清多尺度对流和环流特征在调节孟加拉湾热带气旋路径中的作用

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-07-09 DOI: 10.1016/j.jastp.2024.106291

Mohan Murali Krishna Gorja , Naresh Krishna Vissa , Yesubabu Viswanadhapalli

引用次数: 0

Mathematical modeling and seasonal solar radiation variability in Nigeria’s geo-political zones: A recurrence and multifractal analysis 尼日利亚地缘政治区的数学建模和季节性太阳辐射变化：重现和多分形分析

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-07-05 DOI: 10.1016/j.jastp.2024.106290

A.O. Adelakun , F.M. Adelakun

{"title":"Mathematical modeling and seasonal solar radiation variability in Nigeria’s geo-political zones: A recurrence and multifractal analysis","authors":"A.O. Adelakun , F.M. Adelakun","doi":"10.1016/j.jastp.2024.106290","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106290","url":null,"abstract":"<div>This article delves into the seasonal variation of solar radiation patterns across Nigeria’s four geo-political zones, exploring their complex, scale-dependent behaviors. By employing chaotic quantifiers, the study characterizes irregular and self-similar patterns, enhancing our understanding of solar radiation variability and heterogeneity. The research uniquely fits meteorological parameters onto a global solar radiation model and focuses on the underexplored nonlinear aspects within tropical regions, specifically in the Nigerian context. Utilizing daily data from ERA INTERIM satellite archives for representative stations, the study employs nonlinear time series analysis methods like recurrence plots, recurrence qualitative analysis, and multifractal spectral analysis to comprehensively explore the unpredictable behaviors observed. The quantifier spectrums play a key role in revealing intricate scaling behaviors and correlation structures among environmental variables, shedding light on patterns often concealed by conventional statistical methods. For instance, we found that solar radiation variability in the northern region increases more significantly during the dry season compared to the wet season, unlike in the southern region. Additionally, the multifractal spectral analysis revealed a higher degree of complexity in solar radiation patterns during transition periods between seasons. The findings reveal a low recurrence quantitative analysis, long right tail, and truncations at both ends of the spectrum. This suggests instability in solar radiation across different seasons and locations. Nonetheless, the results also demonstrate that solar radiation is consistently available throughout the year, which is typical of tropical regions.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106290"},"PeriodicalIF":1.8,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141583165","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

Solar global irradiance from actinometric degree data for Filaret Observatory (Bucharest), 1892–1903 根据 Filaret 天文台（布加勒斯特）1892-1903 年的光度数据得出的太阳全球辐照度

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-07-03 DOI: 10.1016/j.jastp.2024.106282

Viorel Badescu , Nicolae Rotar , Alexandru Dumitrescu , Giorgiana Lüftner , Cristian Oprea , Marius Paulescu

{"title":"Solar global irradiance from actinometric degree data for Filaret Observatory (Bucharest), 1892–1903","authors":"Viorel Badescu , Nicolae Rotar , Alexandru Dumitrescu , Giorgiana Lüftner , Cristian Oprea , Marius Paulescu","doi":"10.1016/j.jastp.2024.106282","DOIUrl":"10.1016/j.jastp.2024.106282","url":null,"abstract":"<div>Long-term series of solar irradiation measured at ground level are not available in the old times. However, long-term series of actinometric degree data obtained by using the Arago-Davy instrument have been recorded in the second half of the 19th century in several locations of the world. We have developed recently a method to estimate global solar irradiance on horizontal surface from actinometric degree data (doi.org/10.1007/s00704-023-04485-2). This opens a way of finding proxy information about the incident solar irradiance on various areas of the globe before the 20th century. Hourly actinometric degree data for the years 1892–1903 are available at the Filaret Observatory (Bucharest, Romania, South-Eastern Europe). The observed series have a systematic decreasing tendency, which has been removed by using a correction procedure. The proposed method is used here to evaluate solar global irradiance at Filaret Observatory. Solar irradiance data provided by the Twentieth Century Reanalysis Project version 3 (20CRv3) are used as a reference. The expected hourly and daily average solar irradiance values show reasonable qualitative consistency with the 20CRv3 data. This consistency is notably stronger during the warmer months from April to September. Much better agreement is found for the monthly averaged solar global irradiance values. At this level, the proposed method and the procedure of the 20CRv3 project seem to validate each other.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106282"},"PeriodicalIF":1.8,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141623790","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

Observation of tropical positive cloud-to-ground flashes accompanied by chaotic and regular pulse trains 观测到伴有混乱和规则脉冲序列的热带正向云地闪光

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-06-28 DOI: 10.1016/j.jastp.2024.106285

Muhammad Haziq Mohammad Sabri , Mohd Riduan Ahmad , Yuji Takayanagi , Muhammad Zuhair Bolqiah Edris , Shamsul Ammar Shamsul Baharin , Takeshi Morimoto , Zen-Ichiro Kawasaki , Mohd Zafri Baharuddin , Vernon Cooray

{"title":"Observation of tropical positive cloud-to-ground flashes accompanied by chaotic and regular pulse trains","authors":"Muhammad Haziq Mohammad Sabri , Mohd Riduan Ahmad , Yuji Takayanagi , Muhammad Zuhair Bolqiah Edris , Shamsul Ammar Shamsul Baharin , Takeshi Morimoto , Zen-Ichiro Kawasaki , Mohd Zafri Baharuddin , Vernon Cooray","doi":"10.1016/j.jastp.2024.106285","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106285","url":null,"abstract":"<div>This study investigates the occurrence of chaotic pulse trains (CPTs) and regular pulse trains (RPTs) in tropical positive cloud-to-ground (CG) lightning flashes. These flashes are categorized into four types based on the initial polarity of the initial breakdown (IB) pulses and their relationship to the first return stroke (RS). A total of 71 positive CG flashes from five thunderstorm events were analyzed. The analysis reveals instances of CPTs and RPTs both before and after the first positive RS, along with the occurrence of mixed polarities in RPTs. Variations in IB pulse polarities and the presence of CPTs and RPTs before the first positive RS were observed, contrasting with previous findings in negative CG flashes. All positive CG flashes have been detected when cloud top height occurrences were between 12 and 18 km. In contrast, for negative CG flashes with CPTs and RPTs the cloud top height occurrences were between 5 and 12 km. It is interesting that CPTs and RPTs can be detected during IB process of positive CG flashes at relatively high altitude in the thundercloud. Perhaps due to low pressure at higher altitudes in the cloud, electrical process associated with CPTs and RPTs are easily discharged before the occurrence first positive return stroke. The altitudes of cloud top heights for the inverse polarity of IB pulses were located between 16 and 18 km. This research enhances the understanding of positive CG lightning initiation process and their relationship with CPTs and RPTs, as well as the occurrence of recoil leaders.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106285"},"PeriodicalIF":1.8,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481755","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

On the seasonal dependence of intermediate descending layer in low latitudes 低纬度地区中间降水层的季节性变化

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-06-26 DOI: 10.1016/j.jastp.2024.106288

Muhammad Mubasshir Shaikh , Manar Anwer Khaleel Abusirdaneh

{"title":"On the seasonal dependence of intermediate descending layer in low latitudes","authors":"Muhammad Mubasshir Shaikh , Manar Anwer Khaleel Abusirdaneh","doi":"10.1016/j.jastp.2024.106288","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106288","url":null,"abstract":"<div>Understanding the variable behavior of the IDL/Es system contributes significantly to our ability in characterizing and modeling the critical ionospheric dynamics across the globe. In this work we aim to improve the understanding of the IDL/Es system by analyzing the diurnal and seasonal variations in the altitude descent with reference to local time of the day, season, and solar activity. We apply the well-known height-time-intensity analysis method on measurements obtained from the Sharjah ionosonde station, located at the Arabian Peninsula (Sharjah: 25.28°N, 55.46°E) near the northern crest of the equatorial ionization anomaly. The measurements cover three years of the increasing phase of the solar cycle 25 from 2020 to 2022. Considering an oversimplified wind system based on windshear theory, we attempt to establish a relationship between IDL/Es periodicities with diurnal, semidiurnal, and terdiurnal tides without digging into the underlying mechanism. Results suggest a strong relation between semidiurnal and terdiurnal tides and the formation and transport of the IDL, particularly impacting lower E-region and sporadic-E layers during the afternoon and nighttime hours. The results of manual scaling of over eleven thousand ionograms is presented to quantify the behavior of the IDL/Es system's transport. Additionally, a connection between solar activity, descent rate, and initial descending height, with semidiurnal patterns consistently present across seasons and solar activity has been discussed. For different frequency bins used in this work, e.g. 3 MHz, 4 MHz, and 5 MHz, seasonal variations significantly influence descent patterns.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106288"},"PeriodicalIF":1.8,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481753","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

Inter-comparison of World Wide Lightning Location Network (WWLLN) and Lightning Detection Sensor Network (LDSN) data over India 全球雷电定位网络（WWLLN）和印度雷电探测传感器网络（LDSN）数据的相互比较

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-06-26 DOI: 10.1016/j.jastp.2024.106286

Alok Taori , Arun Suryavanshi , Rounaq Goenka , Degala Venkatesh , G. Srinivasa Rao

引用次数: 0

Detecting non-stationarity of precipitation across coastal-terrestrial Virginia 探测弗吉尼亚沿海-陆地降水的非稳态性

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-06-26 DOI: 10.1016/j.jastp.2024.106289

Xiaomin Yang, Xixi Wang, Zhaoyi Cai

{"title":"Detecting non-stationarity of precipitation across coastal-terrestrial Virginia","authors":"Xiaomin Yang, Xixi Wang, Zhaoyi Cai","doi":"10.1016/j.jastp.2024.106289","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106289","url":null,"abstract":"<div>Since the industrial revolution, the Earth's ambient temperature has been rising at an accelerating pace, partially due to the release of greenhouse gases (e.g., carbon dioxide) into the atmosphere. Consequently, precipitation may become nonstationary, leading to new patterns of watershed hydrology with more frequent and/or severe floods and droughts. Non-stationarity occurs when one or more of precipitation characteristics exhibit step changes, temporal trends, and/or variance deviations. The objective of this study was to detect historical variations in precipitation characteristics across coastal and terrestrial Virginia, USA. Thirteen indices were selected to represent precipitation characteristics for amount, intensity, spell, maximum, and exceedance. A modified Mann-Kendall technique was applied to detect step changes and/or temporal trends in these indices on an annual basis. The results indicated that most rain gauges showed a statistically significant step change in one or more indices between 1948 and 2019, with more step increases than step decreases. This indicates that precipitation across Virginia has exhibited non-stationarity, which must be considered for water management. This phenomenon is likely true for most coastal regions worldwide.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106289"},"PeriodicalIF":1.8,"publicationDate":"2024-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141540675","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

Impact of geomagnetic activity on stratosphere and upper troposphere 地磁活动对平流层和对流层上部的影响

IF 1.8 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-06-24 DOI: 10.1016/j.jastp.2024.106287

Jayashree Bulusu , Vasundhara Barde , Chinmaya Nayak , G. Vichare , A.P. Dimri

{"title":"Impact of geomagnetic activity on stratosphere and upper troposphere","authors":"Jayashree Bulusu , Vasundhara Barde , Chinmaya Nayak , G. Vichare , A.P. Dimri","doi":"10.1016/j.jastp.2024.106287","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106287","url":null,"abstract":"<div>During active geomagnetic conditions, a large amount of energy is deposited in the polar atmosphere in the form of particle precipitation that leads to Joule heating creating circulation of intense currents in the auroral region. It can affect the existing background pressure fluctuations in the stratospheric and tropospheric heights, leading to anomalous changes in the vertical temperature (T), zonal (u) and meridional (v) wind. In this study, we demonstrate the effect of active geomagnetic conditions on these atmospheric variables in different longitudinal regions. The investigation involves daily, monthly and seasonal variation of active geomagnetic conditions. Active geomagnetic conditions are selected using geomagnetic activity indices like auroral activity index |AL|>1000 nT, Disturbed Storm time index Dst < -150 and polar cap index PC > 5. Events are identified during November to March for 1990 to 2020 period. Among them 99 active geomagnetic conditions occurred in the month of March which are considered for further investigation. Composite analysis of T, u and v reflects that the temperature shows an increase in the entire atmospheric column; the anomalies in u (u′) and v (v′) show a regional dependence and strengthen in their amplitudes. It is seen from the monthly investigation of March that the Western Pacific, Canadian and East Pacific sectors respond to the active geomagnetic conditions at upper atmospheric pressure levels (approximately 40–70 km altitude) in the polar region. This is indicative of a vertical translation of energy to lower atmosphere during active geomagnetic conditions.</div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":"261 ","pages":"Article 106287"},"PeriodicalIF":1.8,"publicationDate":"2024-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141481752","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