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

Study of dynamics-microphysical-lightning activity characteristics in a tropical hailstorm 热带冰雹的动力学-微物理-闪电活动特征研究

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-21 DOI: 10.1016/j.jastp.2024.106241

Zhe Li , Tinglong Zhang , Dong Zheng , Hai Yu , Xuelin Cui , Min Bao , Fangcong Zhou

{"title":"Study of dynamics-microphysical-lightning activity characteristics in a tropical hailstorm","authors":"Zhe Li , Tinglong Zhang , Dong Zheng , Hai Yu , Xuelin Cui , Min Bao , Fangcong Zhou","doi":"10.1016/j.jastp.2024.106241","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106241","url":null,"abstract":"<div><p>Based on three-dimensional lightning locations and S-band polarimetric Doppler radar data, a hailstorm that occurred on Hainan Island on June 4, 2021 was analyzed in detail. The analysis revealed that the flash activity of hailstorms is mainly intracloud (IC) flashes, the cloud-to-ground (CG) flashes frequency were less, positive CG flashes (+CG) were domination in the CG activity before hailfall. The flash frequency appeared “lightning jumps” when hailstorms merging with convective cells, ice hydrometeors also rapidly increased in the clouds of the mixed-phase area in this period, which was beneficial for efficient electrification. The Zdr column and evolution of echo top indicated presence of an intense updraft during the mature stage of the hailstorm. Zdr column depth about 4 km close to 20 °C during the mature stage. Near the time of the hailfall, Zdr column was contraction, due to sinking hail generated downdraft within the cloud. Zdr column after hailfall may be produced by the convergence of downdraft and sea breeze. In combination with the spatiotemporal distribution of the hydrometeors in hailstorms, flash activity was most closely related to graupel and it plays a important role for flashes electrification. The hail plays a minimum role in charge separation. Radiation sources were concentrated between 50 dBZ and 55 dBZ. The spatial distribution of radiation sources indicated possible complex charge structure within hail storm clouds.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140650631","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

Low latitude geomagnetic response associated with intense geomagnetic storms: Regional space weather in Mexico 与强烈地磁暴相关的低纬度地磁响应：墨西哥的区域空间天气

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-20 DOI: 10.1016/j.jastp.2024.106237

C.I. Castellanos-Velazco , P. Corona-Romero , J.A. González-Esparza , M.A. Sergeeva , A.L. Caccavari-Garza , V.J. Gatica-Acevedo

{"title":"Low latitude geomagnetic response associated with intense geomagnetic storms: Regional space weather in Mexico","authors":"C.I. Castellanos-Velazco , P. Corona-Romero , J.A. González-Esparza , M.A. Sergeeva , A.L. Caccavari-Garza , V.J. Gatica-Acevedo","doi":"10.1016/j.jastp.2024.106237","DOIUrl":"10.1016/j.jastp.2024.106237","url":null,"abstract":"<div><p>In this work we studied the regional manifestations of space weather at central Mexico through isolate the local geomagnetic response from its planetary counterpart. In order to do so, we analyzed 20 intense geomagnetic storms by identifying the ionospheric contribution in their regional geomagnetic data as registered at the Magnetic Observatory of Teoloyucan (located at the north of Mexico City). Our analysis indicated that local geomagnetic response is mainly driven by ionospheric disturbances. We also found that the <em>disturbed polar current number 2</em> and the <em>disturbed dynamo current</em> are particularly relevant for the regional geomagnetic response. Additionally, we showed that regional geomagnetic activity can be approximated by the combined effects of the planetary geomagnetic response and the regional magnetic perturbations induced by the commented ionospheric currents. Finally, our results highlights the particularities that geomagnetic response has at regional scales.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140797334","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

Analysis of total electron content over the African low-latitude region during the maximum phase of solar cycle 24 (2012–2014) 太阳周期24最大阶段（2012-2014年）非洲低纬度地区电子总含量分析

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-15 DOI: 10.1016/j.jastp.2024.106235

E.O. Falayi , P.O. Amaechi , J.A. Oluwafemi

{"title":"Analysis of total electron content over the African low-latitude region during the maximum phase of solar cycle 24 (2012–2014)","authors":"E.O. Falayi , P.O. Amaechi , J.A. Oluwafemi","doi":"10.1016/j.jastp.2024.106235","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106235","url":null,"abstract":"<div><p>This study examined the ionospheric variation over the African low-latitude region using Total Electron Content (TEC) and its wavelet power spectrum (WPS). TEC data were obtained from five Global Positioning System (GPS) stations located in the trough and crests of the equatorial ionization anomaly (EIA) in both hemispheres during quiet periods of the maximum phase of solar cycle 24 (2012–2014). Our results revealed a striking equinoctial asymmetry (EA) with stronger TEC and higher solar flux in September equinox than March equinox of 2012–2013, with the reverse being the case in 2014. As such, the difference in solar flux between both equinoxes might have played a dominant role in driving the EA. Furthermore, we found a hemispheric asymmetry in TEC with higher value towards the crest in the northern hemisphere (southern hemisphere) in September equinox (March equinox) of 2012–2013. In 2014, nevertheless, TEC was remarkably higher towards the crest located in the southern hemisphere in September equinox only. The chaotic time series methods used to examine the TEC variations showed positive Lyapunov exponents (LE) at all stations. This indicated the presence of chaoticity in the African EIA. Nevertheless, stations located towards the southern crest (Eldoret and Dodoma) had the maximum LE values while those at the magnetic equator (Adis Ababa) and northern crest (Nama and Al Wajh) had the minimum values. Consequently, the changes in the internal dynamics of the equatorial ionosphere have impacts on its chaotic behavior.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140558252","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

Periodicities observed in the solar and geomagnetic indexes and in SABER thermospheric infrared power measurements 在太阳和地磁指数以及 SABER 热层红外功率测量中观测到的周期性现象

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-12 DOI: 10.1016/j.jastp.2024.106234

Nabil Nowak , Martin G. Mlynczak , Linda Hunt , B. Thomas Marshall , Christopher J. Mertens

{"title":"Periodicities observed in the solar and geomagnetic indexes and in SABER thermospheric infrared power measurements","authors":"Nabil Nowak , Martin G. Mlynczak , Linda Hunt , B. Thomas Marshall , Christopher J. Mertens","doi":"10.1016/j.jastp.2024.106234","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106234","url":null,"abstract":"<div><p>We analyze periodic features in the F10.7 cm solar radio flux and the Ap geomagnetic index to examine solar-terrestrial coupling in Earth's atmosphere above 100 km. The coupling is indicated by the same periodic features observed in the global infrared power radiated by Nitric Oxide (NO) and Carbon Dioxide (CO<sub>2</sub>). The infrared power data have been measured by the SABER instrument on the NASA TIMED satellite since January 2002. A strong dominant feature for the length of the solar cycle (<em>≈11 years</em>) can be observed in all the datasets. The length of this periodicity can vary from 9.95 years to 12.25 years for different solar cycles. Periodic features larger than the length of the solar cycle are also observed in the F10.7 and Ap index (<em>≈22 years and ≈44 years</em>). A strong 180-day periodic feature can be observed in the Ap index which corresponds to the well-known Russell-McPherron effect. Additionally, the NO power and the Ap index exhibit statistically significant periodic features for shorter periods (e.g., 27, 13.5 and 9 days). This similarity indicates a strong link between the thermosphere's infrared energy budget and the geomagnetic conditions of the upper atmosphere.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140558253","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

Special issue of SCOSTEP's 15th Quadrennial Solar-Terrestrial Physics Symposium (STP-15) SCOSTEP 第 15 届四年一度的日地物理学研讨会（STP-15）特刊

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-12 DOI: 10.1016/j.jastp.2024.106236

Kazuo Shiokawa, Daniel Marsh, Duggirala Pallamraju, Spiros Patsourakos, Nicholas Pedatella, M. Venkat Ratnam, Eugene Rozanov , Nandita Srivastava, S. Tulasiram

引用次数: 0

Relationship between aerosol and cloud characteristics over Delhi in North India during the dry and wet season 北印度德里上空旱季和雨季气溶胶与云层特征之间的关系

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-09 DOI: 10.1016/j.jastp.2024.106233

Pradeep Kumar Verma , A.K. Srivastava , S.P. Shukla , V. Pathak

{"title":"Relationship between aerosol and cloud characteristics over Delhi in North India during the dry and wet season","authors":"Pradeep Kumar Verma , A.K. Srivastava , S.P. Shukla , V. Pathak","doi":"10.1016/j.jastp.2024.106233","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106233","url":null,"abstract":"<div><p>The study investigates the spatio-temporal variations of aerosol and cloud properties retrieved from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite at an urban megacity Delhi in the northern part of India during the dry and wet season for 15 years period from November 2004 to October 2019. This research comprises the study of crucial aerosol optical properties such as aerosol optical depth (AOD), Angstrom exponent (AE) along with the cloud properties such as water vapor (WV), cloud liquid water path (CLWP), cloud effective radius liquid (CERL), cloud fraction (CF), cloud optical depth (COD), cloud top pressure (CTP), and cloud top temperature (CTT). High AOD was observed across the Indo-Gangetic Plain (IGP), including Delhi and exhibited a range of 0.49–0.89 during the dry season and 0.73 to 0.98 during the wet season with a mean value of 0.73 ± 0.05 during the entire study period. High AE value (mean 1.40 ± 0.05) indicates dominance of fine-mode aerosols over the station, associated with high anthropogenic activities. A significantly large increasing trend in AOD was observed over the station during the wet season as compared to the dry season. The seasonal studies represent the maximum value of WV and CTP in the wet season. In addition, CF, CERL, COD and CLWP values were also high during the wet season. Furthermore, a correlation analyses between the aerosol and cloud parameters were carried out during both the seasons. From the analysis, AOD shows a positive correlation with WV, CF, COD and CLWP in both the seasons whereas a negative correlation was observed with CTP in wet season, while positive in dry season. On the other hand, a poor correlation was observed between AOD verses AE and CTT in both the seasons. These findings can contribute to advancing our understanding of aerosol-cloud interactions and inflate air quality assessments at an urban megacity like Delhi.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140554877","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

120-day variability in migrating tides from CMAM30 winds 根据 CMAM30 风向得出的 120 天潮汐迁移变化率

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-06 DOI: 10.1016/j.jastp.2024.106230

Subhajit Debnath, Uma Das

引用次数: 0

Observation of thunderstorm-induced muon events in GRAPES-3 experiment 在 GRAPES-3 试验中观测雷暴诱发的μ介子事件

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-04-04 DOI: 10.1016/j.jastp.2024.106231

Pranaba K. Nayak , M. Chakraborty , S.R. Dugad , S.K. Gupta , B. Hariharan , P. Jagadeesan , A. Jain , Pravata K. Mohanty , D. Pattanaik , M. Rameez , K. Ramesh , L.V. Reddy , M. Zuberi , Y. Hayashi , S. Kawakami , H. Kojima , A. Oshima , S. Shibata , Y. Muraki , T. Nonaka

{"title":"Observation of thunderstorm-induced muon events in GRAPES-3 experiment","authors":"Pranaba K. Nayak , M. Chakraborty , S.R. Dugad , S.K. Gupta , B. Hariharan , P. Jagadeesan , A. Jain , Pravata K. Mohanty , D. Pattanaik , M. Rameez , K. Ramesh , L.V. Reddy , M. Zuberi , Y. Hayashi , S. Kawakami , H. Kojima , A. Oshima , S. Shibata , Y. Muraki , T. Nonaka","doi":"10.1016/j.jastp.2024.106231","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106231","url":null,"abstract":"<div><p>The GRAPES-3 tracking muon telescope located at Ooty (India) records short-term variations in the muon intensity during major thunderstorms, termed thunderstorm-induced muon events (TIMEs). Its excellent angular resolution, coupled with high statistics, allows us to observe subtle directional variations in muon rate. We detected 169 statistically significant events during the five-year period from 2006 through 2010. The monthly and seasonal variation patterns of the observed TIMEs were discussed, emphasizing their occurrence and climatological aspects. The annual diurnal pattern was plotted with the Carnegie curve, considering their possible causal link with the global electric circuit. The work represents the first report from any experiment for such an extended period in an uninterrupted manner.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140539839","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

Seasonal vertical distributions of diurnal variation of ice cloud frequency by CATS measurements over a global region (51°S-51°N) 通过 CATS 测量全球区域（南纬 51 度-北纬 51 度）冰云频率日变化的季节垂直分布情况

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-03-30 DOI: 10.1016/j.jastp.2024.106222

Jin Wang , Honglin Pan , Dongliang An

{"title":"Seasonal vertical distributions of diurnal variation of ice cloud frequency by CATS measurements over a global region (51°S-51°N)","authors":"Jin Wang , Honglin Pan , Dongliang An","doi":"10.1016/j.jastp.2024.106222","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106222","url":null,"abstract":"<div><p>Ice clouds can strongly affect the radiation budget through the reflection (absorption) of solar shortwave (longwave) radiation in the Earth-atmosphere system. Unlike water clouds, ice clouds present a longer lifetime in the upper troposphere. Therefore, the vertical patterns of diurnal variation of ice clouds are of very importance to understand climate change in the globe. The present paper investigates the diurnal variation of ice cloud frequency (ICF) from March 2015 to October 2017 over the global scale (51 <span><math><mrow><mo>°</mo></mrow></math></span> S and 51 <span><math><mrow><mo>°</mo></mrow></math></span> N) by CATS (Cloud-Aerosol Transport System) LiDAR onboard the International Space Station (ISS) and CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) LiDAR measurements. Our results suggest that: (1) ICF derived from the CATS and CALIPSO LiDAR presents the similar geographical variations. (2) The vertical distribution of ICF in land area over the North Hemisphere (NH) is found larger than in the South Hemisphere (SH) likely due to the more dust aerosols as ice nuclei to influence ice cloud formation over the NH. (3) ICF at nighttime (00:00–06:00 and 18:00–23:00) exhibits higher value than daytime (06:00–18:00), especially in high altitude (more than 12 km) ice clouds in the tropics. (4) The number of ice cloud samples is higher in spring and winter compared to summer and autumn, and the highest amount of ice cloud samples in spring(winter) occurs during nighttime(daytime) for most hours. These findings provide significant insights that may help improving the ice cloud's representation in climate models.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140345189","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

Exploring the factors responsible for aerosol asymmetric trends over Indo-Gangetic Plain using remote sensing observations 利用遥感观测探究造成印度洋-甘肃平原上空气溶胶不对称趋势的因素

IF 1.9 4区地球科学

Journal of Atmospheric and Solar-Terrestrial Physics Pub Date : 2024-03-29 DOI: 10.1016/j.jastp.2024.106220

Krishna Kumar Shukla , Raju Attada , Chandan Sarangi , Ravi Kumar Kunchala , Venkata Phanikumar Devulapalli

{"title":"Exploring the factors responsible for aerosol asymmetric trends over Indo-Gangetic Plain using remote sensing observations","authors":"Krishna Kumar Shukla , Raju Attada , Chandan Sarangi , Ravi Kumar Kunchala , Venkata Phanikumar Devulapalli","doi":"10.1016/j.jastp.2024.106220","DOIUrl":"https://doi.org/10.1016/j.jastp.2024.106220","url":null,"abstract":"<div><p>The present study investigates the influencing factors responsible for the asymmetry in aerosol optical depth (AOD) trends using long-term datasets (2003–2019) over western and eastern Indo-Gangetic Plain (IGP) regions during the pre-monsoon season. Analysis from Modern-Era Retrospective Analysis for Research and Applications Version-2 (MERRA-2) for different aerosols illustrates that dust aerosols dominate over the western IGP (W-IGP), while sulphate and carbonaceous aerosols (black carbon (BC) and organic carbon (OC)) majorly contributed to the total AOD over the eastern IGP (E-IGP). Our study reveals a significant decline in AOD over the W-IGP, while a rising trend over E-IGP from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite observations. A dipole pattern in AOD trends over IGP indicates the aerosol loading from combined effects of various natural and anthropogenic emissions under favourable meteorological conditions over the W-IGP and E-IGP, respectively. Furthermore, the declining AOD trend over W-IGP is mainly attributed to increased pre-monsoonal rainfall, which supports the wet deposition, increases soil moisture, thus reducing soil erodibility, and correlates strongly with meteorological factors. The rising AOD trend over the E-IGP appears to be influenced by increased anthropogenic emissions (i.e., BC, OC, and sulphate) from the industrialization of the region, decreased rainfall, and enhanced westerly-induced advection of aerosols from W-IGP. Our study indicates that the regional meteorological variables and anthropogenic sources influence changes in the AOD trends over the IGP region.</p></div>","PeriodicalId":15096,"journal":{"name":"Journal of Atmospheric and Solar-Terrestrial Physics","volume":null,"pages":null},"PeriodicalIF":1.9,"publicationDate":"2024-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140351267","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