Japan Geoscience Union Meeting 2021

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[J] Oral

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

[A-CG39] Science in the Arctic Region

Fri. Jun 4, 2021 9:00 AM - 10:30 AM Ch.11 (Zoom Room 11)

convener:Tetsu Nakamura(Faculty of Environmental Earth Science, Hokkaido University), Jun Ono(Japan Agency for Marine-Earth and Science and Technology), Rigen Shimada(Japan Aerospace Exploration Agency), Tomoki Morozumi(Research Faculty of Agriculture, Hokkaido University), Chairperson:Tetsu Nakamura(Faculty of Environmental Earth Science, Hokkaido University), Jun Ono(Japan Agency for Marine-Earth and Science and Technology), Tomoki Morozumi(Research Faculty of Agriculture, Hokkaido University), Rigen Shimada(Japan Aerospace Exploration Agency)

9:00 AM - 9:15 AM

[ACG39-01] Rapid Arctic warming enhances Eurasian heat wave and East Asian heavy rainfall

*Tetsu Nakamura1, Tomonori Sato1 (1.Faculty of Environmental Earth Science, Hokkaido University)

Keywords:Rapid Arctic warming, Heat wave, Heavy rainfall events

In 2020 Eurasia has experienced unprecedented warm conditions long-lasting from winter to summer. Especially in Siberia marked heat wave were observed as record breaking hot temperature 38.0 ℃ at Verkhoyansk in 20 June. At the same time in East Asia heavy rainfall was observed in southern China and western Japan, where severe flood affected large area and caused human live and economic damages. Rapid warming over the Arctic region as twice speed of the global mean surely induces increase of heat waves over the Eurasia. Concerning the considerable increase of heavy rainfall over the East Asia in the recent years, such rapid Arctic warming may also affect on East Asian rainfall. Here we study relationship between the heat wave and heavy rainfall occurred in eastern edge of the Eurasian continent. Both of the atmospheric internal variability and externally forced anomalies possibly cause the heat wave and the heavy rainfall. Especially the latter, because mainly due to the anthropogenic global warming, has anticipating warning of increase of severe disasters over those regions continuously to the future.