gtcrustГеодинамика и тектонофизикаGeodynamics & Tectonophysics2078-502XInstitute of the Earth's crust of the Russian Academy of Sciences, Siberian Branch10.5800/GT-2025-16-6-0869GLMFJQgtcrust-2162Research ArticleСОВРЕМЕННАЯ ГЕОДИНАМИКАRECENT GEODYNAMICSМНОГОЛЕТНИЕ ТРЕНДЫ СУММАРНОГО ВЛАГОСОДЕРЖАНИЯ ТРОПОСФЕРЫ В РАЗНЫХ ШИРОТНЫХ ЗОНАХ ВОСТОЧНОЙ СИБИРИMULTIYEAR TRENDS IN THE TOTAL MOISTURE CONTENT OF THE TROPOSPHERE IN DIFFERENT-LATITUDE ZONES OF EASTERN SIBERIAhttps://orcid.org/0000-0002-7281-4252ДембеловМ. Г.DembelovM. G.

670047, Улан-Удэ, ул. Сахьяновой, 6, Республика Бурятия

6 Sakhyanova St, UlanUde 670047, Republic of Buryatia 

mdembelov@mail.ruhttps://orcid.org/0000-0002-7102-3977БашкуевЮ. Б.BashkuevYu. B.

670047, Улан-Удэ, ул. Сахьяновой, 6, Республика Бурятия

6 Sakhyanova St, UlanUde 670047, Republic of Buryatia 

https://orcid.org/0000-0003-1599-5373ЛухневА. В.LukhnevA. V.

664033, Иркутск, ул. Лермонтова, 128

128 Lermontov St, Irkutsk 664033 

https://orcid.org/0000-0002-1066-2601СаньковВ. А.SankovV. A.

664033, Иркутск, ул. Лермонтова, 128

128 Lermontov St, Irkutsk 664033 

Институт физического материаловедения СО РАНРоссияInstitute of Physical Materials Science, Siberian Branch of the Russian Academy of SciencesRussian FederationИнститут земной коры СО РАНРоссияInstitute of the Earth’s Crust, Siberian Branch of the Russian Academy of SciencesRussian Federation202511122025166869869Copyright © Дембелов М.Г., Башкуев Ю.Б., Лухнев А.В., Саньков В.А., 20252025Дембелов М.Г., Башкуев Ю.Б., Лухнев А.В., Саньков В.А.Dembelov M.G., Bashkuev Y.B., Lukhnev A.V., Sankov V.A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.gt-crust.ru/jour/article/view/2162

GPS-измерения являются значимым инструментом для навигации и высокоточной космической геодезии. Важнейшим приложением по результатам обработки GPS-данных является определение уровня суммарного влагосодержания (IWV) в пределах нижней нейтральной части атмосферы. Радиозондирования (РЗ) также являются важным инструментом для непосредственного определения суммарного влагосодержания. По данным запусков радиозондов определяются значения средневзвешенной температуры (Tm) в условном вертикальном столбе с целью извлечения значений IWV из обработанных GPS-данных по полной зенитной тропосферной задержке (ZTD). Рассмотрены изменения суммарного влагосодержания с 1999 по 2021 г. с использованием обработанных данных постоянных GPS-измерений, радиозондирований и приземной метеорологии в пунктах наблюдения IRKT (Иркутск), YAKT (Якутск) и TIXI (Тикси), расположенных в разных широтных областях.

Выполнено сравнение выявленных тенденций влагосодержания по РЗ и GPS-измерениям с расчетами по модели, учитывающей приземные метеоданные. GPS-измерения показали лучшую согласованность с модельными расчетами, чем с данными РЗ. Наблюдается тенденция к росту суммарного влагосодержания тропосферы по данным GPS-наблюдений за весь период исследования; несмотря на большие широтные отличия трех пунктов наблюдения, имеет место консолидированная тенденция на уровне 0.33±0.04 мм за десятилетие.

GPS measurements are an important tool for navigation and high-precision space geodesy. Of particular importance is the use of the GPS data for determining integrated water vapor (IWV) level within the lower neutral part of the atmosphere. Radiosonde (RS) data are also important for direct determination of the integrated water vapor. The values of the weighted mean temperature (Tm) in a vertical column are found from radiosonde launches in order to extract IWV values from GPS-derived total zenith tropospheric delay (ZTD) estimates. The total moisture content variability from 1999 to 2021 is considered based on the datasets of permanent GPS measurements, radiosondes and surface meteorology at IRKT (Irkutsk), YAKT (Yakutsk) and TIXI (Tiksi) observation points located in different-latitude zones.

The RS- and GPS-derived trends in moisture content were compared with the surface meteorological data-based model calculations. GPS measurements showed a good agreement with model calculations rather than with RS data. The tropospheric integrated water vapor tends to increase over the entire GPS observation period, and, despite a large latitudinal difference between the three observation points, there is a consolidated tendency at the level of 0.33±0.04 mm per decade.

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The authors declare that there are no conflicts of interest present.