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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Ekologiya cheloveka (Human Ecology)</journal-id><journal-title-group><journal-title xml:lang="en">Ekologiya cheloveka (Human Ecology)</journal-title><trans-title-group xml:lang="ru"><trans-title>Экология человека</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1728-0869</issn><issn publication-format="electronic">2949-1444</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">678873</article-id><article-id pub-id-type="doi">10.17816/humeco678873</article-id><article-id pub-id-type="edn">QRUPRI</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL STUDY ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Influence of solar radiation components on partial oxygen density in the surface air layer in subarctic and subtropical regions</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние компонентов солнечной радиации на парциальную плотность кислорода приземного слоя воздуха в субарктическом и субтропическом регионах</trans-title></trans-title-group><trans-title-group xml:lang="zh"><trans-title>太阳辐射成分对亚北极和亚热带地区近地空气层氧密度的影响</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5318-9623</contrib-id><contrib-id contrib-id-type="spin">7132-3844</contrib-id><name-alternatives><name xml:lang="en"><surname>Ragozin</surname><given-names>Oleg N.</given-names></name><name xml:lang="ru"><surname>Рагозин</surname><given-names>Олег Николаевич</given-names></name><name xml:lang="zh"><surname>Ragozin</surname><given-names>Oleg N.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><bio xml:lang="zh"><p>MD, Dr. Sci. (Medicine), Professor</p></bio><email>oragozin@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="researcherid">AHC-1001-2022</contrib-id><name-alternatives><name xml:lang="en"><surname>Muthelo</surname><given-names>Livhuwani</given-names></name><name xml:lang="ru"><surname>Мутэло</surname><given-names>Ливувани</given-names></name><name xml:lang="zh"><surname>Muthelo</surname><given-names>Livhuwani</given-names></name></name-alternatives><address><country country="ZA">South Africa</country></address><bio xml:lang="en"><p>PhD, Senior Lecturer</p></bio><bio xml:lang="ru"><p>PhD, старший преподаватель</p></bio><bio xml:lang="zh"><p>PhD, Senior Lecturer</p></bio><email>livhuwani.muthelo@ul.ac.za</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5201-4496</contrib-id><contrib-id contrib-id-type="spin">8125-9359</contrib-id><name-alternatives><name xml:lang="en"><surname>Shalamova</surname><given-names>Elena Yu.</given-names></name><name xml:lang="ru"><surname>Шаламова</surname><given-names>Елена Юрьевна</given-names></name><name xml:lang="zh"><surname>Shalamova</surname><given-names>Elena Yu.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Dr. Sci. (Biology), Associate Professor</p></bio><bio xml:lang="ru"><p>д-р биол. наук, доцент</p></bio><bio xml:lang="zh"><p>Dr. Sci. (Biology), Associate Professor</p></bio><email>selenzik@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5923-0941</contrib-id><contrib-id contrib-id-type="spin">4369-3372</contrib-id><name-alternatives><name xml:lang="en"><surname>Gudkov</surname><given-names>Andrej B.</given-names></name><name xml:lang="ru"><surname>Гудков</surname><given-names>Андрей Борисович</given-names></name><name xml:lang="zh"><surname>Gudkov</surname><given-names>Andrej B.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Dr.Sci. (Medicine), Professor</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор</p></bio><bio xml:lang="zh"><p>MD, Dr.Sci. (Medicine), Professor</p></bio><email>gudkovab@nsmu.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5759-0270</contrib-id><contrib-id contrib-id-type="spin">6095-8392</contrib-id><name-alternatives><name xml:lang="en"><surname>Pogonysheva</surname><given-names>Irina A.</given-names></name><name xml:lang="ru"><surname>Погонышева</surname><given-names>Ирина Александровна</given-names></name><name xml:lang="zh"><surname>Pogonysheva</surname><given-names>Irina A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. биол. наук, доцент</p></bio><bio xml:lang="zh"><p>Cand. Sci. (Biology), Associate Professor</p></bio><email>severina.i@bk.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0199-2948</contrib-id><contrib-id contrib-id-type="spin">7335-7635</contrib-id><name-alternatives><name xml:lang="en"><surname>Ragozinа</surname><given-names>Elina R.</given-names></name><name xml:lang="ru"><surname>Рагозина</surname><given-names>Элина Разифовна</given-names></name><name xml:lang="zh"><surname>Ragozinа</surname><given-names>Elina R.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elinka1000@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8815-1556</contrib-id><contrib-id contrib-id-type="spin">1179-9674</contrib-id><name-alternatives><name xml:lang="en"><surname>Pogonyshev</surname><given-names>Denis A.</given-names></name><name xml:lang="ru"><surname>Погонышев</surname><given-names>Денис Александрович</given-names></name><name xml:lang="zh"><surname>Pogonyshev</surname><given-names>Denis A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biology), Associate Professor</p></bio><bio xml:lang="ru"><p>канд. биол. наук, доцент</p></bio><bio xml:lang="zh"><p>Cand. Sci. (Biology), Associate Professor</p></bio><email>d.pogonyshev@mail.ru</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Khanty-Mansiysk State Medical Academy</institution></aff><aff><institution xml:lang="ru">Ханты-Мансийская государственная медицинская академия</institution></aff><aff><institution xml:lang="zh">Khanty-Mansiysk State Medical Academy</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">University of Limpopo</institution></aff><aff><institution xml:lang="ru">Университет Лимпопо</institution></aff><aff><institution xml:lang="zh">University of Limpopo</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Northern State Medical University</institution></aff><aff><institution xml:lang="ru">Северный государственный медицинский университет</institution></aff><aff><institution xml:lang="zh">Northern State Medical University</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Nizhnevartovsk State University</institution></aff><aff><institution xml:lang="ru">Нижневартовский государственный университет</institution></aff><aff><institution xml:lang="zh">Nizhnevartovsk State University</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2025-06-17" publication-format="electronic"><day>17</day><month>06</month><year>2025</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-07-20" publication-format="electronic"><day>20</day><month>07</month><year>2025</year></pub-date><volume>32</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><issue-title xml:lang="zh"/><fpage>80</fpage><lpage>89</lpage><history><date date-type="received" iso-8601-date="2025-04-24"><day>24</day><month>04</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-05-20"><day>20</day><month>05</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Эко-Вектор</copyright-statement><copyright-statement xml:lang="zh">Copyright ©; 2025,</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://hum-ecol.ru/1728-0869/article/view/678873">https://hum-ecol.ru/1728-0869/article/view/678873</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold> Solar radiation consists of electromagnetic radiation and the solar wind. It becomes nonlinear during solar flares, with increased wave radiation and the emission of large amounts of charged particles. Increased solar radiation intensity alters the Earth’s light and thermal balance and geomagnetic activity, affecting both weather and oxygen status.</p> <p><bold>AIM: </bold>To assess the effect of solar radiation components on changes in partial oxygen density in subarctic and subtropical regions, depending on the level of solar activity.</p> <p><bold>METHODS:</bold> Sunspot data were obtained from the Royal Observatory of Belgium. Solar radiation levels, the planetary magnetic index (Ap), and the local geomagnetic activity index (K) were assessed using data from the All-Russian Research Institute of Hydrometeorological Information. Partial oxygen density was calculated based on air temperature, atmospheric pressure, and relative air humidity. Data from 2007 (low solar activity) and 2001 (high solar activity) were compared. Wavelet analysis was used for mathematical processing.</p> <p><bold>RESULTS:</bold> In the North, the mesor, amplitude, and autocorrelation of solar radiation in 2001 did not differ from those recorded in 2007. In subtropical regions, the mesor and amplitude of solar radiation were significantly higher, whereas autocorrelation was lower, indicating a disruption of time series. The synchronization coefficient demonstrated a strong correlation between solar radiation and partial oxygen density in both high and low solar activity years in the North, and a weak synchronization in the subtropics during the year of low solar activity. Synchronization of the Ap and K indices in Polokwane increased as solar activity rose from very low to moderate. The synchronization coefficients for Ap and partial oxygen density, as well as K and partial oxygen density, indicated a very weak correlation between magnetic indices and partial oxygen density, regardless of solar activity. In Khanty-Mansiysk, synchronization between the Ap and K indices remained weak. The synchronization coefficient for Ap and partial oxygen density showed a non-significant increase with rising solar activity, whereas synchronization between K and partial oxygen density decreased from weak to very weak as solar activity increased.</p> <p><bold>CONCLUSION:</bold> During the year of low solar activity, both geographic regions showed a significant correlation between solar radiation fluctuations and partial oxygen density. In subtropical regions, increasing solar activity was associated with a weaker correlation between solar radiation and partial oxygen density. Significant synchronization between fluctuations in partial oxygen density and planetary or local magnetic activity ranged from weak to very weak, regardless of solar activity levels or geographic latitude.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Солнечная радиация состоит из электромагнитного излучения и солнечного ветра. Она имеет нелинейный характер во время вспышек, когда наблюдается усиление волнового излучения и выброс мощных потоков заряженных частиц. Увеличение интенсивности солнечной радиации изменяет световой и тепловой баланс Земли, геомагнитную активность, влияет на погоду и кислородный статус.</p> <p><bold>Цель.</bold> Оценить влияние компонентов солнечной радиации на динамику парциальной плотности кислорода в субарктическом и субтропическом регионах в зависимости от уровня солнечной активности.</p> <p><bold>Материалы и методы.</bold> Сведения о числе солнечных пятен получены из материалов Королевской обсерватории Бельгии. Для оценки уровня солнечной радиации, планетарного магнитного индекса (Ар) и локального индекса геомагнитной активности (К) использовали данные Всероссийского научно-исследовательского института гидрометеорологической информации. Значения парциальной плотности кислорода определяли расчётным методом с учётом температуры, атмосферного давления и относительной влажности воздуха. Сравнивали данные 2007 г. (низкая солнечная активность) и 2001 г. (высокая солнечная активность). Для математической обработки применяли вейвлет-анализ.</p> <p><bold>Результаты.</bold> Мезор, амплитуда и автокорреляция солнечной радиации на Севере в 2001 г. не отличаются от данных, зарегистрированных в 2007 г. В субтропиках мезор и амплитуда солнечной радиации значимо выше, но автокорреляция снижена, что свидетельствует о нарушении структуры временнÓго ряда. Величина коэффициента синхронизации демонстрирует заметную взаимосвязь солнечной радиации и парциальной плотности кислорода в год активного и спокойного Солнца на Севере и слабую синхронизацию в субтропиках в год с низкой солнечной активностью. Синхронизация индексов Ар и К в Полокване растёт при повышении солнечной активности от очень слабой до средней; величина коэффициента синхронизации Ар и парциальной плотности кислорода и К и парциальной плотности кислорода указывает на очень слабую взаимосвязь магнитных индексов и парциальной плотности кислорода вне зависимости от солнечной активности. В Ханты-Мансийске синхронизация между индексами Ар и К остаётся слабой, величина коэффициента синхронизации Ар и парциальной плотности кислорода незначимо растёт с повышением солнечной активности, а синхронизация К и парциальной плотности кислорода с ростом солнечной активности снижается со слабой до очень слабой.</p> <p><bold>Заключение.</bold> В обоих географических регионах в год спокойного Солнца выявлена значимая взаимосвязь колебаний солнечной радиации и парциальной плотности кислорода. В субтропиках рост солнечной активности характеризуется снижением взаимосвязи солнечной радиации и парциальной плотности кислорода. Статистически значимая синхронизация колебаний парциальной плотности кислорода и планетарной и локальной магнитной активности колеблется от слабой до очень слабой вне зависимости от уровня солнечной активности и географической широты.</p></trans-abstract><trans-abstract xml:lang="zh"><p>摘要</p> <p>证。太阳辐射由电磁辐射和太阳风组成。在太阳耀斑期间，其表现出非线性特征，伴有电磁波辐射增强以及大量带电粒子的释放。太阳辐射强度的增加会改变地球的光热平衡和地磁活动，进而影响天气状况和氧气状态。</p> <p>目的。根据太阳活动水平，评估太阳辐射不同成分对亚北极和亚热带地区氧密度动态变化的影响。</p> <p>材料与方法。关于太阳黑子数的数据来自Royal Observatory of Belgium公开发布的资料。太阳辐射强度、行星磁指数（Ap）和局部地磁活动指数（K）的数据取自All-Russian Research Institute of Hydrometeorological Information。氧密度根据温度、大气压和相对湿度计算得出。比较了2007年（太阳活动低年）与2001年（太阳活动高年）的数据。数学分析采用小波分析法。</p> <p>结果。在2001年北方地区，太阳辐射的平均值、振幅和自相关性与2007年无显著差异。而在亚热带地区，其平均值和振幅明显较高，自相关性降低，表明时间序列结构受到扰动。同步系数的数值显示，在太阳活动活跃年和太阳活动平静年，北方地区的太阳辐射与氧密度之间存在显著相关性，而在太阳活动较低的年份，亚热带地区则表现出较弱的同步性。在Polokwane，随着太阳活动水平从极低升高至中等，Ар指数与К指数的同步性增强；然而，Ар与氧密度、К与氧密度之间的同步系数显示，无论太阳活动水平如何，这些地磁指数与氧密度之间的相关性始终极弱。在Khanty-Mansiysk，Ар指数与К指数之间的同步性仍然较弱；随着太阳活动增强，Ар与氧密度之间的同步系数略有上升，而К与氧密度之间的同步性则从弱下降至极弱。</p> <p>结论。在两个地理区域的太阳平静年，太阳辐射与氧密度的波动之间表现出显著的相关性。在亚热带地区，太阳活动增强时，太阳辐射与氧密度之间的相关性减弱。不论太阳活动水平或地理纬度如何，氧密度与行星磁活动和局部磁活动之间的统计学显著同步性均处于由弱至极弱的范围。</p></trans-abstract><kwd-group xml:lang="en"><kwd>extreme weather conditions</kwd><kwd>solar activity</kwd><kwd>geomagnetic activity</kwd><kwd>oxygen</kwd><kwd>North</kwd><kwd>subtropics</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>экстремальные погодные условия</kwd><kwd>солнечная активность</kwd><kwd>геомагнитная активность</kwd><kwd>кислород</kwd><kwd>Север</kwd><kwd>субтропики</kwd></kwd-group><kwd-group xml:lang="zh"><kwd>极端气象条件</kwd><kwd>太阳活动</kwd><kwd>地磁活动</kwd><kwd>氧气</kwd><kwd>北方</kwd><kwd>亚热带</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Fedorov VM, Sokratov SA, Frolov DM. 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