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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Russian Journal of Earth Sciences</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Russian Journal of Earth Sciences</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Russian Journal of Earth Sciences</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="online">1681-1208</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">96833</article-id>
   <article-id pub-id-type="doi">10.2205/2026ES001059</article-id>
   <article-id pub-id-type="edn">ryalaf</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>ORIGINAL ARTICLES</subject>
    </subj-group>
    <subj-group>
     <subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Current Water Chemical Composition of the Kizhi Skerries of Lake Onego and Its Dynamics Over the Last 30 Years</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Химический состав воды Кижских шхер Онежского озера и тенденции его изменения за последние 30 лет</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8106-3665</contrib-id>
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Зобкова</surname>
       <given-names>Мария Валентиновна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Zobkova</surname>
       <given-names>Mariya Valentinovna</given-names>
      </name>
     </name-alternatives>
     <email>rincalika21@yandex.ru</email>
     <bio xml:lang="ru">
      <p>кандидат химических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of chemical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт водных проблем Севера КарНЦ РАН, ФИЦ «Карельский научный центр РАН»</institution>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Northern Water Problems Institute of Karelian Research Centre of the Russian Academy of Sciences</institution>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2026-04-21T15:19:17+03:00">
    <day>21</day>
    <month>04</month>
    <year>2026</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2026-04-21T15:19:17+03:00">
    <day>21</day>
    <month>04</month>
    <year>2026</year>
   </pub-date>
   <volume>26</volume>
   <issue>1</issue>
   <elocation-id>ES1017</elocation-id>
   <history>
    <date date-type="received" iso-8601-date="2025-03-28T00:00:00+03:00">
     <day>28</day>
     <month>03</month>
     <year>2025</year>
    </date>
    <date date-type="accepted" iso-8601-date="2025-09-08T00:00:00+03:00">
     <day>08</day>
     <month>09</month>
     <year>2025</year>
    </date>
   </history>
   <self-uri xlink:href="https://ras.editorum.ru/en/nauka/article/96833/view">https://ras.editorum.ru/en/nauka/article/96833/view</self-uri>
   <abstract xml:lang="ru">
    <p>Представлены результаты оценки современного состояния Кижских шхер Онежского озера по химическим показателям воды в сравнении с фоновым участком открытого плёса озера. Рассмотрен ионный состав воды, содержание биогенных и литофильных элементов, органических и загрязняющих веществ, газовый состав. Выявлено, что вода Кижских шхер является слабоминерализованной, мезотрофной, с низким содержанием органических веществ. В воде этого района выявлено систематическое превышение предельно допустимых концентраций (ПДК) по содержанию нефтепродуктов (1,2–4,0 раза), что, по всей видимости, связано с интенсивным судоходством в данном районе озера. Отмечены случаи превышения ПДК по содержанию железа общего (1,1–3,6 раз) и меди (1,1–5,8 раз), которые связаны с региональной спецификой вод гумидной зоны, а не с антропогенным влиянием. В настоящее время качество воды в этом районе озера является хорошим. На основе архивных данных была проведена оценка изменения химического состава воды в районе Кижских шхер за последние 30 лет. В результате были установлены статистически значимые изменения ионного состава как на фоновой станции, так и в шхерном районе, снижение содержания всех форм азота и значений соотношения Nмин/Робщ, в то же время выявлен рост цветности и концентрации СО2 и нефтепродуктов. Положительная динамика в содержании нефтепродуктов в районе Кижских шхер вызвана интенсивной нагрузкой от водного транспорта в связи с увеличивающимся туристическим потоком. Выявленные тренды изменения других химических показателей не связаны с локальным антропогенным влиянием и требуют дальнейшего изучения. Вероятно, они объясняются глобальными процессами, такими как снижение выбросов загрязняющих веществ в атмосферу и изменение климата.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The results of the assessment of the current state of the Kizhi skerries of Lake Onego by the water chemical parameters compering to the background area of the open central part of Lake Onego were presented. The following parameters were considered: ionic composition, nutrients, organic matter, gas composition (CO2, O2), Fe, Mn, pollutants (heavy metals, oils, synthetic surface-active substance). It was found that the water of the Kizhi skerries area is weakly mineralized, mesotrophic with a low content of organic substances. A systematic excess of the maximum permissible concentration for oils (1.2–4.0 times), as well as for Fe (1.1–3.6 times) and Cu (1.1–5.8 times) was fixed. The first one was caused by intensive navigation in this part of the lake, while the second and third ones – by regional water characteristics of the humid zone, and not by anthropogenic influence. Currently, water in this part of the lake is of good quality. Using archival data, an assessment of water chemical composition changes of the Kizhi skerries for the last three decades has been conducted. The ionic composition was changed in the area of the Kizhi skerries and the central part of the lake, which was confirmed by the Pearson’s test. The concentration of all nitrogen forms and the values of Nmin/TP ratio were decreased, but at the same time, the color values and concentrations of oils and CO2 were increased. Apparently, intensive navigation due to the growing tourist flow has led to increasing of oil concentrations in the area of the Kizhi skerries. Other changes of chemical parameters were not caused by local anthropogenic influence and require further study. They may probably be associated with global processes, such as reducing industrial emissions of contaminants into the atmosphere or climate change.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>химический состав воды</kwd>
    <kwd>ионный состав</kwd>
    <kwd>органическое вещество</kwd>
    <kwd>биогенные элементы</kwd>
    <kwd>загрязняющие вещества</kwd>
    <kwd>климатические изменения</kwd>
    <kwd>антропогенная нагрузка</kwd>
    <kwd>Онежское озеро</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>Water chemical composition</kwd>
    <kwd>organic matter</kwd>
    <kwd>nutrients</kwd>
    <kwd>pollutants</kwd>
    <kwd>climate change</kwd>
    <kwd>anthropogenic impact</kwd>
    <kwd>Lake Onega</kwd>
   </kwd-group>
   <funding-group>
    <funding-statement xml:lang="ru">Исследование выполнено за счёт гранта Российского научного фонда № 23-17-20018, https://rscf.ru/project/23-17-20018/, проводимого совместно с органами власти Республики Карелия с финансированием из Фонда венчурных инвестиций Республики Карелия (ФВИ РК). Исследования выполнены на научном оборудовании Центра коллективного пользования КарНЦ РАН.</funding-statement>
    <funding-statement xml:lang="en">This study was supported by grant No. 23-17-20018 from the Russian Science Foundation (https://rscf.ru/project/23-17-20018/), conducted jointly with the authorities of the Republic of Karelia and financed by the Republic of Karelia Venture Investment Fund (RVIF). The research was conducted using scientific equipment at the Shared Use Center of the Karelian Research Center of the Russian Academy of Sciences.</funding-statement>
   </funding-group>
  </article-meta>
 </front>
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