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French-Russian workshop “Environmental Changes in Siberia” 21-23 october 2019 High latitudes of the northern hemisphere and particularly Siberia play a key role in the Earth system across multiple couplings between climate, biogeochemical cycles, environment, glacial processes and hydrology. Siberia is a particular hot spot of these interactions. Furthermore, human activities also exert a strong impact with the exploration of oil and gas, forest exploitation, agriculture and other uses of natural resources. Here, humans and the perturbed natural systems are part of numerous interactions that require better understanding. Recently, several French-Russian collaborations have launched and completed original research programs to address these questions. The present workshop aims to be a lively place for further developing such bilateral collaborations, and to exchange on recent scientific findings across disciplines. We will resume the collective discussion of French Russian scientific collaborations in the perimeter of environmental sciences (in a very wide sense), identify current topics, foster and enhance collaborations, and finally increase the potential for interdisciplinary research beyond environmental sciences, especially toward humanities. Topics of the workshop include: climatic change, pollution, ecosystems changes, biogeochemistry, permafrost, environmental chemistry, aquatic/coastal/marine research, geography, risk assessment/perception, urban environment/urban studies, modelling and observations, international initiatives, interdisciplinary studies and link to humanities and social sciences... Date: 21-23 October 2019, 3 days, noon-to-noon. Location: Cité Universitaire Internationale, Paris, France Format: Plenary topical sessions, consisting of short presentations and roundtable discussions. The book of abstracts will be published and indexed. Keynote Introduction – Jean Jouzel (LSCE, France; vice-chair IPCC WG1, Nobel Prize co-winner with IPCC in 2007, formerly coordinator of the Russian Megagrant WSibIso) Cyril Moulin (Deputy director of CNRS-INSU) Registration: https://envchangesib.sciencesconf.org Registration deadline: 30/09/2019. Participation is free of charge. Lunch on Day 2 is provided. Scientific committee : Jean-Daniel Paris (LSCE, France), Olga N. Solomina (Institute of Geography, Russia), Kathy Law (LATMOS, France), Sergey Kirpotin (Tomsk State University, Russia), Roman Tesseirenc (Ecolab, France), Boris D. Belan (IAO, Russia), Alexandra Lavrillier (CEARC, France), Pavel I. Konstantinov (Lomonosov Moscow State University, Russia), Marie Noelle Houssais (CNRS, France), Mikhail Yu. Arshinov (IAO, Russia), Jérôme Chappellaz (CNRS, IPEV, France), Yuri S. Balin (IAO, Russia), Catherine Ottlé (LSCE, France), Antoine Séjourné (GEOPS, France) Contact: [email protected] 1 French-Russian workshop \Environmental Change in Siberia" 21-23 Oct 2019 Paris, France France Table of contents EnvChangeSib ws Flyer2.pdf1 Terrestrial ecosystems and biogeochemistry4 Seasonal trends in limnological properties and greenhouse gas emissions from different types of thermokarst lakes in Central Yakutia, Fr´ed´ericBouchard [et al.]5 High resolution record of dissolved organic carbon export from a subarctic catch- ment underlain by discontinuous permafrost, Laure Gandois [et al.]........6 Spectral characteristics of northern plants for monitoring technogenic impact on the ecosystems of the Russian Subarctic with satellite imagery, Elena Golubeva [et al.]............................................7 Study of the thermal imprint of a river in a continuous permafrost area (Syrdakh, Central Yakutia, Russia), Christophe Grenier [et al.]................9 Russian-French collaboration via the mega-transect approach for the large-scale bilateral and international projects, Sergey Kirpotin [et al.]............ 10 Long-term and seasonal changes of lakes of the Pyakupur river basin, Iurii Kolesnichenko [et al.]............................................ 12 High Performance Computing for permafrost modeling: towards mechanistic assessments of climate change impacts at the scale of the experimental water- shed, Laurent Orgogozo [et al.]............................ 13 Carbon cycle in northern peatlands of western Siberia, Russia, Anna Peregon [et al.]............................................ 15 Understanding the impact of current permafrost thawing on environment: release of carbon in Central Yakutia (Eastern Siberia), Antoine S´ejourn´e[et al.]..... 16 1 Permafrost degradation under climate change: experimental approach in a cold room., Francois Costard [et al.]............................ 18 Atmospheric pollution and climate forcing 19 Spatial distribution CO2 and CH4 concentrations across West Siberia: mobile measurement campaigns of 2018-2019, Mikhail Arshinov [et al.].......... 20 Comprehensive study of the troposphere over the Russian Arctic using the "Op- tik" Tu-134 aircraft laboratory, Boris Belan [et al.]................. 21 Using ship-borne observations of methane isotopic ratio in the Arctic Ocean to understand methane sources in the Arctic, Antoine Berchet [et al.]........ 22 UHIARC-Network as a tool for investigation of boundary layer inversions and urban heat island in big cities of eastern Arctic, Pavel Konstantinov [et al.]... 23 Airborne, shipborne and ground-based lidar monitoring of atmospheric aerosol fields in Western and Eastern Siberia (Lake Baikal), Sergei Nasonov [et al.]... 24 Submicron aerosol and "soot" in the troposphere of Siberia, Mikhail Panchenko [et al.]............................................ 25 Regional anthropogenic methane in Siberia : airborne observation of oil and gas emissions, Jean-Daniel Paris [et al.].......................... 27 Observations of the horizontally oriented crystalline particles with a scanning polarization lidar, Ioganes Penner [et al.]....................... 29 Ship-borne measurements of atmospheric composition over the Arctic seas in 2015-2019, Andrey Skorokhod [et al.]......................... 30 Identification of aerosol sources in Siberia and study of aerosol transport at re- gional scale by airborne and space-borne lidar measurement, Antonin Zabukovec [et al.]............................................ 31 Interdisciplinary studies 32 Permafrost thaw in the coastal Russian Arctic: interconnectedness of cultural and material dimensions, Natalia Doloisio......................... 33 Traditional diet and environmental contaminants in coastal Chukotka, Russian Arctic, Alexey Dudarev................................ 34 2 Hydrologic and Morphological Response of the Lena River to Ongoing Climate Change (Eastern Siberia), Emmanu`eleGautier [et al.]............... 35 Interactions of science and society on the modern stage: transdisciplinarity as a key principle, essential requirement and the main criterion for the success of the development of modern network mega-science, Tatyana Kolesnikova [et al.]... 36 How Arctic Indigenous Peoples in Siberia Observe Changes in Climate and Bio- diversity ?, Alexandra Lavrillier [et al.]........................ 38 Homo agere or Homo superstes? (The Human acting or Human surviving?) - On the way to the cohesive language of description and design of research in transdisciplinary context, Lidia Rakhmanova.................... 39 Holocene climate in Southern Siberia: state-of-the- art, Olga Solomina...... 41 List of participants 41 Author Index 43 3 Terrestrial ecosystems and biogeochemistry 4 Seasonal trends in limnological properties and greenhouse gas emissions from different types of thermokarst lakes in Central Yakutia Fr´ed´ericBouchard ∗ 1, Antoine S´ejourn´e 1, Christine Hatt´e 2, Lara Hughes-Allen ∗ , Fran¸cois Costard 1 G´eosciencesParis Sud (GEOPS) { Universit´eParis-Sud - Paris 11, Centre National de la Recherche Scientifique : UMR8148 { Universit´eParis Sud, b^ats.504 510, 91405 ORSAY Cedex, France 2 Laboratoire des Sciences du Climat et de l'Environnement (LSCE) { CEA, CNRS : UMR8212, Universit´ede Versailles Saint-Quentin-en-Yvelines (UVSQ) { Domaine du CNRS, Gif-sur-Yvette, France, France Thermokarst (thaw) lakes are widespread across circum-Arctic permafrost regions and have been identified as potential hotspots of greenhouse gas (GHG) emissions at the global scale. In Central Yakutia (Eastern Siberia), it has been estimated that about 40% of the territory has been affected by thermokarst activity since the early Holocene. Today, many lakes of different ages and morphologies are visible across the landscape. Based on earlier characterization of these lakes by geochemical and stable isotope techniques, we investigated three types of lakes for their limnological properties (temperature, conductivity, dissolved oxygen, pH) and their dissolved GHG concentrations (CO2, CH4, N2O). Measurements were conducted at four different periods during the year 2018-2019 (autumn, winter, spring, summer), providing a full annual cycle of seasonal dynamics. Preliminary results show striking differences both between lake types at a given season and between seasons for a given lake type. Moreover, lakes that are deeper than the maximum thickness of ice cover can be strongly stratified during winter time, potentially fueling high GHG production within oxygen-depleted bottom waters. Such heterogeneities must be taken into account when trying to quantify the contribution of Siberian thermokarst lakes to GHG emissions from high-latitude regions and the related permafrost-carbon feedbacks to the global climate. ∗Speaker 5 High resolution record of dissolved
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