Japan Geoscience Union Meeting 2022

Presentation information

[J] Poster

A (Atmospheric and Hydrospheric Sciences ) » A-CG Complex & General

[A-CG43] Science in the Arctic Region

Sun. May 29, 2022 11:00 AM - 1:00 PM Online Poster Zoom Room (11) (Ch.11)

convener:Jun Ono(JAMSTEC Japan Agency for Marine-Earth Science and Technology), convener:Tomoki Morozumi(Research Faculty of Agriculture, Hokkaido University), Rigen Shimada(Japan Aerospace Exploration Agency), convener:Masatake Hori(University of Tokyo, Atmosphere Ocean Research Institute), Chairperson:Jun Ono(Japan Agency for Marine-Earth Science and Technology)

11:00 AM - 1:00 PM

[ACG43-P07] Winter extreme precipitation event in interior Alaska in December 2021

*Kazuyoshi Suzuki1, Shinji Matsumura2, Bob Busey3, Hideki Kobayashi1 (1.Japan Agency for Marine-Earth Science and Technology, 2.Hokkaido University, 3.University of Alaska Fairbanks)

Keywords:Snowfall, Rainfall, Snowpack

A record-breaking precipitation event was observed in interior Alaska in December 2021, with daily maximum precipitation of nearly 100 mm in both Fairbanks and Poker Flat, located farther north in the near Arctic Circle, on December 26. Monthly precipitation in December exceeded 200 mm at both locations, with Poker Flat recording the higher precipitation. The Japan Agency for Marine-Earth Science and Technology (JAMSTEC), in collaboration with the University of Alaska, has set up a tower at the Poker Flat supersite to intensively observe the water and carbon cycles of the boreal forest, and is simultaneously conducting meteorological and subsurface observations. In this study, we will clarify the contribution of rainfall and snowfall to precipitation events exceeding summer precipitation in the Arctic in late December using a snow model, in-situ observation and reanalysis dataset. In addition, the effects of record-breaking precipitation events on the snowpack layer and the water and energy balance were analyzed from the snowpack model. We will also discuss how record-breaking precipitation events are related to long-term climate change such as global warming.