Banafsheh Taji, Mohammad Hossein Memarian, Seyed Mohammad Rastegar
{"title":"2019-2021年中纬度地区总电子含量日变化及季节变化分析","authors":"Banafsheh Taji, Mohammad Hossein Memarian, Seyed Mohammad Rastegar","doi":"10.1134/S0016793224601054","DOIUrl":null,"url":null,"abstract":"<p>The behavior of the total electron content (TEC) on a global scale has been the subject of research for several years. However, certain features of this behavior, including the effectiveness of energetic particles and their anomalies at different latitudes, are poorly understood. This research reports a comparative analysis of the seasonal and daily changes in the TEC as observed from 2019 to 2021 (low solar activity) in the mid-latitudes between 33.1 and 40.1 degrees. The points include eight stations across four countries with the following coordinates: Tehran (Iran), Hamedan (Iran), Tabriz (Iran), Yerevan (Armenia), Diyarbakir (Turkey), Ankara (Turkey), Nicosia (Cyprus), and Baghdad (Iraq). Also, by taking the quiet solar activity conditions into account, TEC’s variations have been investigated hourly, daily, and seasonally. For this research, TEC observations from the Global Positioning System (GPS) have been analyzed. The results showed that the highest TEC values occurred during 0900–1100 UT (1300–1500 LT), and the lowest values occurred during 2400–0200 UT (400–600 LT). From a seasonal point of view, in 2019, the maximum value of TEC was observed during the March equinox, and the lowest maximum value of TEC was observed during the December solstice, but in 2020 and 2021 the maximum value of TEC was observed during the June solstice and September equinox, the lowest value of TEC is observed during the December solstice.</p>","PeriodicalId":55597,"journal":{"name":"Geomagnetism and Aeronomy","volume":"64 1 supplement","pages":"S85 - S96"},"PeriodicalIF":0.7000,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A Case Study of Daily and Seasonal Changes in Total Electron Content in Mid-Latitudes Regions in the Period of 2019–2021\",\"authors\":\"Banafsheh Taji, Mohammad Hossein Memarian, Seyed Mohammad Rastegar\",\"doi\":\"10.1134/S0016793224601054\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The behavior of the total electron content (TEC) on a global scale has been the subject of research for several years. However, certain features of this behavior, including the effectiveness of energetic particles and their anomalies at different latitudes, are poorly understood. This research reports a comparative analysis of the seasonal and daily changes in the TEC as observed from 2019 to 2021 (low solar activity) in the mid-latitudes between 33.1 and 40.1 degrees. The points include eight stations across four countries with the following coordinates: Tehran (Iran), Hamedan (Iran), Tabriz (Iran), Yerevan (Armenia), Diyarbakir (Turkey), Ankara (Turkey), Nicosia (Cyprus), and Baghdad (Iraq). Also, by taking the quiet solar activity conditions into account, TEC’s variations have been investigated hourly, daily, and seasonally. For this research, TEC observations from the Global Positioning System (GPS) have been analyzed. The results showed that the highest TEC values occurred during 0900–1100 UT (1300–1500 LT), and the lowest values occurred during 2400–0200 UT (400–600 LT). From a seasonal point of view, in 2019, the maximum value of TEC was observed during the March equinox, and the lowest maximum value of TEC was observed during the December solstice, but in 2020 and 2021 the maximum value of TEC was observed during the June solstice and September equinox, the lowest value of TEC is observed during the December solstice.</p>\",\"PeriodicalId\":55597,\"journal\":{\"name\":\"Geomagnetism and Aeronomy\",\"volume\":\"64 1 supplement\",\"pages\":\"S85 - S96\"},\"PeriodicalIF\":0.7000,\"publicationDate\":\"2025-03-13\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Geomagnetism and Aeronomy\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0016793224601054\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geomagnetism and Aeronomy","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S0016793224601054","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0
摘要
总电子含量（TEC）在全球范围内的行为是多年来研究的课题。然而，这种行为的某些特征，包括高能粒子的有效性和它们在不同纬度的异常，人们知之甚少。本研究报告了2019年至2021年在中纬度33.1至40.1度之间观测到的TEC（太阳活动低）的季节和日变化的比较分析。这些观测点包括四个国家的八个观测站，坐标如下：德黑兰（伊朗）、哈马丹（伊朗）、大不里士（伊朗）、埃里温（亚美尼亚）、迪亚巴克尔（土耳其）、安卡拉（土耳其）、尼科西亚（塞浦路斯）和巴格达（伊拉克）。此外，考虑到安静的太阳活动条件，TEC的变化已经被研究了每小时、每天和季节。本研究利用全球定位系统（GPS）的TEC观测数据进行分析。结果表明，TEC值在0900 ~ 1100 UT （1300 ~ 1500 LT）期间最高，在2400 ~ 0200 UT （400 ~ 600 LT）期间最低。从季节上看，2019年TEC最大值出现在3月春分，最小值出现在12月至；2020年和2021年TEC最大值出现在6月至和9月春分，最小值出现在12月至。
A Case Study of Daily and Seasonal Changes in Total Electron Content in Mid-Latitudes Regions in the Period of 2019–2021
The behavior of the total electron content (TEC) on a global scale has been the subject of research for several years. However, certain features of this behavior, including the effectiveness of energetic particles and their anomalies at different latitudes, are poorly understood. This research reports a comparative analysis of the seasonal and daily changes in the TEC as observed from 2019 to 2021 (low solar activity) in the mid-latitudes between 33.1 and 40.1 degrees. The points include eight stations across four countries with the following coordinates: Tehran (Iran), Hamedan (Iran), Tabriz (Iran), Yerevan (Armenia), Diyarbakir (Turkey), Ankara (Turkey), Nicosia (Cyprus), and Baghdad (Iraq). Also, by taking the quiet solar activity conditions into account, TEC’s variations have been investigated hourly, daily, and seasonally. For this research, TEC observations from the Global Positioning System (GPS) have been analyzed. The results showed that the highest TEC values occurred during 0900–1100 UT (1300–1500 LT), and the lowest values occurred during 2400–0200 UT (400–600 LT). From a seasonal point of view, in 2019, the maximum value of TEC was observed during the March equinox, and the lowest maximum value of TEC was observed during the December solstice, but in 2020 and 2021 the maximum value of TEC was observed during the June solstice and September equinox, the lowest value of TEC is observed during the December solstice.
期刊介绍：
Geomagnetism and Aeronomy is a bimonthly periodical that covers the fields of interplanetary space; geoeffective solar events; the magnetosphere; the ionosphere; the upper and middle atmosphere; the action of solar variability and activity on atmospheric parameters and climate; the main magnetic field and its secular variations, excursion, and inversion; and other related topics.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
