Irina Kurganova, Anna Bobrik, Alexander Chumbaev, Vyacheslav Ershov, Olga Goncharova, Danil Ilyasov, Alexander Ivanov, Dmitry Ivanov, Ekaterina Kapitsa, Dmitry Karelin, Dmitry Khoroshaev, Galina Koptsik, Alexander Kuprin, Mikhail Kuznetsov, Anastasia Makhnykina, Anastasia Matvienko, Elena Moshkina, Natalia Shmakova, Lada Sokolova, Dmitry Zamolodchikov, Vladimir kaganov, Anton Kumanyayev, Valentin Lopes-de-Gerenyu, Anastasia Mamai, Anatoly Prokushkin, Nikolai Ryabov, Dmitry Sapronov, Nikita Sidenko, Alexey Sorokin, Svetlana Zorina
В издании Proceedings of the 11th International Carbon Dioxide Conference
Год: 2024 Страницы: 304100
Soil respiration (SR) is one of the largest fluxes in the global carbon cycle, which exceeds the anthropogenic CO2 emission by more than an order magnitude Monitoring of SR is important to estimate carbon balance at ecosystem, regional, national, and global scale. The national monitoring network of SR across Russian territory was organized in the framework of the Most Important Innovative Project of National Importance "Carbon in Ecosystems: Monitoring", which started in the end of 2022. We have analyzed the data of field measurements of SR flux and soil temperature (Ts) at 5 (or 10) cm depth, which were carried out simultaneously during the summer period (June – August) 2023 in 75 various ecosystems (tundra, forest, grassland, bog, agrocenosis, etc.) located in the main bioclimatic zones across the Russian Federation, which occupies 1/9 of the terrestrial surface. Experimental plots for SR observations were situated from 48.06 to 67.64⁰N and from 29.72 to 136.55⁰E. More than half of them were located in forest ecosystems. The positive effect of soil temperature on the average summer SR rate and maximum monthly SR values was observed for the interval of mean Ts between 10 and 20°C i.e., for tundra to forest steppe transect. The high values of summer Ts in semi-desert region (>20°C) inhibited the SR process due to the soil moisture deficit. The lowest values of SR were detected in tundra and bog ecosystems. Among forest ecosystems, the lowest SR rate was typical for larch forest stand, whereas the highest SR values were observed in the deciduous forests in the forest-steppe zone. The study was carried out as part of the Most Important Innovative Project of National Importance "Development of a system for ground-based and remote monitoring of carbon pools and greenhouse gas fluxes in the territory of the Russian Federation" (#123030300031-6).
