Responses in Arctic marine carbon cycle processes: conceptual scenarios and implications for ecosystem function

• Published in: Polar Research
• Main Authors: Findlay, Helen S., Gibson, Georgina, Kedra, Monika, Morata, Nathalie, Orchowska, Monika, Pavlov, Alexey K., Reigstad, Marit, Silyakova, Anna, Tremblay, Jean-Eric, Walczowski, Waldemar, Weydmann, Agata, Logvinova, Christie
• Other Authors: Plymouth Marine Laboratory (PML), International Arctic Research Center (IARC), University of Alaska Fairbanks (UAF), University of Maryland Center for Environmental Science (UMCES), University of Maryland System, Polska Akademia Nauk = Polish Academy of Sciences (PAN), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Norwegian Polar Institute, Arctic and Antarctic Research Institute (AARI), Russian Federal Service for Hydrometeorology and Environmental Monitoring (Roshydromet), University of Tromsø (UiT), Department of Biology Québec, Université Laval Québec (ULaval), Clark University
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: ACL; ocean acidification; sea-ice; dissolved organic-matter; food-web structure; calcium-carbonate; climate change; Sea ice; marginal ice-zone; bering-sea; carbon cycling; chukchi seas; copepod fecal pellets; ecosystem function; upper water column; [SDE.BE]Environmental Sciences/Biodiversity and Ecology; [SDU]Sciences of the Universe [physics]; Arctic; Arctic Ocean; Bering Sea; Pacific; Chukchi; Climate change; Ocean acidification; Polar Research
• Online Access: https://hal.science/hal-02556220; https://hal.science/hal-02556220/document; https://hal.science/hal-02556220/file/Responses%20in%20Arctic%20marine%20carbon%20cycle%20processes%20conceptual%20scenarios%20and%20implications%20for%20ecosystem%20function.pdf; https://doi.org/10.3402/polar.v34.24252

WOS:000353050900001 International audience The Arctic Ocean is one of the fastest changing oceans, plays an important role in global carbon cycling and yet is a particularly challenging ocean to study. Hence, observations tend to be relatively sparse in both space and time. How the Arctic functions, geophysically, but also ecologically, can have significant consequences for the internal cycling of carbon, and subsequently influence carbon export, atmospheric CO2 uptake and food chain productivity. Here we assess the major carbon pools and associated processes, specifically summarizing the current knowledge of each of these processes in terms of data availability and ranges of rates and values for four geophysical Arctic Ocean domains originally described by Carmack & Wassmann (2006): inflow shelves, which are Pacific-influenced and Atlantic-influenced; interior, river-influenced shelves; and central basins. We attempt to bring together knowledge of the carbon cycle with the ecosystem within each of these different geophysical settings, in order to provide specialist information in a holistic context. We assess the current state of models and how they can be improved and/or used to provide assessments of the current and future functioning when observational data are limited or sparse. In doing so, we highlight potential links in the physical oceanographic regime, primary production and the flow of carbon within the ecosystem that will change in the future. Finally, we are able to highlight priority areas for research, taking a holistic pan-Arctic approach.