Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2021

Идентификатор DOI: 10.3389/feart.2021.651731

Ключевые слова: arctic, precipitation, sea ice, stable isotopes, atmospheric circulation, water cycle

Аннотация: Arctic sea-ice loss is emblematic of an amplified Arctic water cycle and has critical feedback implications for global climate. Stable isotopes (delta O-18, delta H-2, d-excess) are valuable tracers for constraining water cycle and climate processes through space and time. Yet, the paucity of well-resolved Arctic isotope data preclude an empirically derived understanding of the hydrologic changes occurring today, in the deep (geologic) past, and in the future. To address this knowledge gap, the Pan-Arctic Precipitation Isotope Network (PAPIN) was established in 2018 to coordinate precipitation sampling at 19 stations across key tundra, subarctic, maritime, and continental climate zones. Here, we present a first assessment of rainfall samples collected in summer 2018 (n = 281) and combine new isotope and meteorological data with sea ice observations, reanalysis data, and model simulations. Data collectively establish a summer Arctic Meteoric Water Line where delta H-2 = 7.6.delta O-18-1.8 (r(2) = 0.96, p 0.75 parts per thousand/degrees C) were observed at continental sites, while statistically significant temperature relations were generally absent at coastal stations. Model outputs indicate that 68% of the summer precipitating air masses were transported into the Arctic from mid-latitudes and were characterized by relatively high delta O-18 values. Yet 32% of precipitation events, characterized by lower delta O-18 and high d-excess values, derived from northerly air masses transported from the Arctic Ocean and/or its marginal seas, highlighting key emergent oceanic moisture sources as sea ice cover declines. Resolving these processes across broader spatial-temporal scales is an ongoing research priority, and will be key to quantifying the past, present, and future feedbacks of an amplified Arctic water cycle on the global climate system.

Журнал: FRONTIERS IN EARTH SCIENCE

Выпуск журнала: Vol. 9

Номера страниц: 651731

ISSN журнала: 22966463

Место издания: LAUSANNE

Издатель: FRONTIERS MEDIA SA

• Mellat Moein (Univ Oulu, Ecol & Genet Res Unit, Oulu, Finland; Univ Oulu, Water Energy & Environm Engn Res Unit, Oulu, Finland)
• Bailey Hannah (Univ Oulu, Ecol & Genet Res Unit, Oulu, Finland)
• Mustonen Kaisa-Riikka (Univ Oulu, Ecol & Genet Res Unit, Oulu, Finland)
• Marttila Hannu (Univ Oulu, Water Energy & Environm Engn Res Unit, Oulu, Finland)
• Klein Eric S. (Univ Alaska Anchorage, Dept Geol Sci, Anchorage, AK USA)
• Gribanov Konstantin (Ural Fed Univ, Inst Nat Sci, Ekaterinburg, Russia)
• Bret-Harte M.Syndonia (Univ Alaska, Inst Arctic Biol, Fairbanks, AK 99701 USA)
• Chupakov Artem V. (UrB Russian Acad Sci, N Laverov Fed Ctr Integrated Arctic Res, Arkhangelsk, Russia)
• Divine Dmitry V. (Fram Ctr, Norwegian Polar Inst, Tromso, Norway; Ny Alesund Res Stn, Tromso, Norway)
• Else Brent (Univ Calgary, Dept Geog, Calgary, AB, Canada)
• Filippov Ilya (Yugra State Univ, UNESCO Chair Environm Dynam & Global Climate Chan, Environm Dinam & Global Climate Change Res Ctr, Khanty Mansiysk, Russia)
• Hyoky Valtteri (Finnish Forest Adm, Metsahallitus, Muonio, Finland)
• Jones Samantha (Univ Calgary, Dept Geog, Calgary, AB, Canada)
• Kirpotin Sergey N. (Tomsk State Univ, BIO GEO CLIM Lab, Tomsk, Russia; Tuvan State Univ, Kyzyl, Russia)
• Kroon Aart (Univ Copenhagen, Arctic Stn, Greenland, Copenhagen, Greenland)
• Markussen Helge Tore (Fram Ctr, Norwegian Polar Inst, Tromso, Norway; Ny Alesund Res Stn, Tromso, Norway)
• Nielsen Martin (Univ Copenhagen, Arctic Stn, Greenland, Copenhagen, Greenland)
• Olsen Maia (Greenland Inst Nat Resources, Dept Environm & Mineral Resources, Nuuk, Greenland)
• Paavola Riku (Univ Oulu, Oulanka Res Stn, Oulu, Finland)
• Pokrovsky Oleg S. (Tomsk State Univ, BIO GEO CLIM Lab, Tomsk, Russia; Univ Toulouse, CNRS, Geosci Environm Toulouse, Toulouse, France)
• Prokushkin Anatoly (Siberian Fed Univ, Fac Biol, Krasnoyarsk, Russia; SB RAS, VN Sukachev Inst Forest, Krasnoyarsk, Akademgorodok, Russia)
• Rasch Morten (Univ Copenhagen, Arctic Stn, Greenland, Copenhagen, Greenland)
• Raundrup Katrine
• Suominen Otso (Univ Turku, Biodivers Unit, Kevo Subarct Res Inst, Turku, Finland)
• Syvanpera Ilkka (Univ Turku, Biodivers Unit, Kevo Subarct Res Inst, Turku, Finland)
• Vignisson Solvi Runar (Sudurnes Sci & Learning Ctr, Sandgerdi, Iceland)
• Zarov Evgeny
• Welker Jeffrey M. (Univ Oulu, Ecol & Genet Res Unit, Oulu, Finland; Univ Alaska Anchorage, Dept Biol Sci, Anchorage, AK USA; Univ Arctic UArctic, Rovaniemi, Finland)

• Web of Science Core Collection