Large-scale quantifying of sources and sinks of atmospheric carbon in Central Siberia: from middle taiga to Arctic tundra

• DOI: 10.5194/egusphere-egu2020-13639
• Publication Date: 2020-03-10T00:45:11Z
• Authors: Alexey Panov; Anatoly Prokushkin; Anastasiya Urban; Vyacheslav Zyrianov; Mikhail Korets; Nikita Sidenko; Jošt Lavrič; Martin Heimann
• Keywords: 13. Climate action; 11. Sustainability; 15. Life on land; 6. Clean water

<p><span>The boreal and arctic zone of Siberia represents a «hot spot» area in the global Earth climate system, containing large potentially vulnerable carbon stocks as well considerable dioxide (CO<sub>2</sub>) methane (CH<sub>4</sub>) exchange fluxes with atmosphere. </span><span>Up to recent time Siberian region was only sparsely covered by flux measurements. Solely frame EU-funded projects «Eurosiberian Carbonflux» «Terrestrial Carbon Observing System – Siberia» (TCOS-Siberia) between 1998 2005 several atmospheric terrestrial ecosystem stations were operational European Russia Siberia.</span></p><p><span>Since 2006</span><span>, </span><span>in order monitor long-term biogeochemical changes</span><span>, </span><span>the Zotino Tall Tower Observatory (ZOTTO; www.zottoproject.org</span><span>)</span><span>, </span><span>a research platform for large-scale climatic observations</span><span>, </span><span>is Central (60°48' N, 89°21' E) about 20 km west Yenisei river. consist</span><span>s </span><span>of 304-m tall mast continuous high-precision measurements greenhouse gases, meteorology multitude aerosol properties planetary boundary layer (PBL). Sampling PBL is essential «top-down» approach observation strategy, since it minimizes local effects permits capture regional concentration signals. Such are used inversion modelling estimate </span><span>sinks/</span><span>sources at surface over territory</span><span>. In turn, tower </span><span>observations linked eddy covariance fluxes, </span><span>introducing </span><span>a «bottom-up» observational approach, locally representative ecosystems: pine forest</span><span>–</span><span>bog complexes (</span><span>60</span><span>°</span><span>48</span><span>'</span><span>N; 89</span><span>°</span><span>22</span><span>'</span><span>E)</span><span>; </span><span>a mid-taiga dark coniferous forest (60°01'</span><span>N</span><span>; 89°49'</span><span>E</span><span>); northern taiga mature larch forest </span><span>(64°12'</span><span>N</span><span>; 100</span><span>°</span><span>27</span><span>'</span><span>E</span><span>) forest-tundra ecotone (67°28'</span><span>N</span><span>; 86°29'</span><span>E</span><span>). This meridional network captures CO<sub>2 </sub>and CH<sub>4 </sub>in ecosystems main provinces Yenisey river basin 2580 thousand km², that can be scaled up using vegetation maps, biomass inventories remote sensing information</span><span>. Since 2018 expanded new coastal station GHG </span><span>(</span>СО<sub><span>2</span></sub><span>/</span>СН<sub><span>4</span></sub><span>/</span>Н<sub><span>2</span></sub>О<span>) </span><span>on shore Arctic ocean </span><span>(</span><span>73°33'</span><span>N</span><span>; 80°34'</span><span>E) near Dikson settlement. </span><span>Such enhances signal derived «ZOTTO» regarding budget trace gases Siberia, tracing ocean-continent transport </span><span>also extends circum-Arctic network</span><span>.</span></p><p><span>Here we summarize scientific rationale network, infrastructure details stations, environments provide some exemplary results obtained from The reported study funded Max Planck Society (Germany), RSF project № 14-24-00113 RFBR 18-05-00235 18-05-60203.</span></p>