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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">Environmental Dynamics and Global Climate Change</journal-id><journal-title-group><journal-title xml:lang="en">Environmental Dynamics and Global Climate Change</journal-title><trans-title-group xml:lang="ru"><trans-title>Environmental Dynamics and Global Climate Change</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2218-4422</issn><issn publication-format="electronic">2541-9307</issn><publisher><publisher-name xml:lang="en">Yugra State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">642575</article-id><article-id pub-id-type="doi">10.18822/edgcc642575</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theoretical works</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теоретические работы</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">Comparison of two schemes of radiation transfer within the vegetation canopy based on measurements at the Mukhrino carbon polygon</article-title><trans-title-group xml:lang="ru"><trans-title>Comparison of two schemes of radiation transfer within the vegetation canopy based on measurements at the Mukhrino carbon polygon</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name><surname>Pavinsky</surname><given-names>S. V.</given-names></name><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Faculty of Geography</p></bio><bio xml:lang="ru"><p>географический факультет</p></bio><email>stanislavpavinskij@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Stepanenko</surname><given-names>V. M.</given-names></name><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Research Computing Center, Faculty of Geography</p></bio><bio xml:lang="ru"><p>Научно-исследовательский вычислительный центр, географический факультет</p></bio><email>stanislavpavinskij@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Dyukarev</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Dyukarev</surname><given-names>E. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>stanislavpavinskij@gmail.com</email><xref ref-type="aff" rid="aff3"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М.В.Ломоносова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Ugra State University</institution></aff><aff><institution xml:lang="ru">Югорский государственный университет</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Institute for Monitoring of Climate and Ecological Systems SB RAS</institution></aff><aff><institution xml:lang="ru">Институт мониторинга климатических и экологических систем СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Yugra State University</institution></aff><aff><institution xml:lang="ru">Югорский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-07-10" publication-format="electronic"><day>10</day><month>07</month><year>2025</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>58</fpage><lpage>68</lpage><history><date date-type="received" iso-8601-date="2024-12-05"><day>05</day><month>12</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Stepanenko V., Pavinskiy S., Dyukarev E.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Степаненко В., Павинский С., Дюкарев Е.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Stepanenko V., Pavinskiy S., Dyukarev E.</copyright-holder><copyright-holder xml:lang="ru">Степаненко В., Павинский С., Дюкарев Е.</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-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://edgccjournal.org/EDGCC/article/view/642575">https://edgccjournal.org/EDGCC/article/view/642575</self-uri><abstract xml:lang="en"><p>Models of radiation transfer within vegetation cover are an important component of the Earth system models, since solar radiation is the main source of energy on Earth and determines the thermal regime of the soil. It also significantly depends on the interception of the radiation by vegetation. The aim of this work is to evaluate the accuracy of a two-stream model of radiation transfer and a multiple reflection model that approximates radiation fluxes within vegetation cover using geometric series. Validation and comparison of the models were conducted using automatic observations recorded in a forest ecosystem at the Mukhrino carbon polygon. It is shown that the latter model is sensitive both to setting the proportion between atmospheric direct and diffuse radiation coming from the atmosphere and to refining the reflection and transmission parameters for leaves by dividing the spectrum into several parts. It is demonstrated that when setting the same optical parameters, the two-stream scheme has a higher degree of consistency with observations than the multiple reflection scheme.</p></abstract><trans-abstract xml:lang="ru"><p>С использованием данных автоматических наблюдений, проводимых на карбоновом полигоне «Мухрино», были сопоставлены две схемы расчёта переноса радиации внутри растительного полога: схема многократных отражений и модель переноса радиации в двухпотоковом приближении. Показано, что последняя имеет чувствительность как к заданию пропорции между прямой и рассеянной радиацией, поступающей из атмосферы, так и к уточнению параметров отражения и пропускания для листьев путем разбиения спектра на несколько частей. Продемонстрировано, что при задании одних и тех же оптических параметров двухпотоковая схема имеет более высокую степень согласованности с наблюдениями, чем схема многократных отражений.</p></trans-abstract><kwd-group xml:lang="en"><kwd>solar radiation</kwd><kwd>models of radiation transfer in vegetation canopies</kwd><kwd>Mukhrino Carbon Polygon</kwd><kwd>automatic observations</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>солнечная радиация</kwd><kwd>модели переноса радиации внутри растительного полога</kwd><kwd>карбоновый полигон «Мухрино»</kwd><kwd>автоматические наблюдения</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The pulsation measurement tower, the data from which were used in the work, was built and maintained with the support of a grant from the Government of the Tyumen Region in accordance with the program of the West Siberian Interregional Scientific and Educational Center of World Class within the framework of the national project "Science". Agreement No. 94-DON/05.5/20-YUGU-231 dated 12/14/2020 Verification and refinement of mathematical models were carried out within the framework of the state assignment of Lomonosov Moscow State University.</funding-statement><funding-statement xml:lang="ru">Вышка пульсационных измерений, данные которой использовались в работе, возведена и поддерживается при поддержке гранта Правительства Тюменской области в соответствии с программой Западно-Сибирского межрегионального научно-образовательного центра мирового уровня в рамках национального проекта «Наука». Соглашение № 94-ДОН/05.5/20-ЮГУ-231 от 14.12.2020 Проверка и уточнение математических моделей выполнены в рамках государственного задания МГУ имени М.В. Ломоносова.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bonan G.B. 1996. 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