Recent Variations in Air Mass Alteration over the Japan Sea Causing Snowfall in Hokkaido, Japan

DOI
  • Kishita Ayaka
    Department of Eartch Sciences, Chiba University, Japan
  • Higuchi Atsushi
    Center for Environmental Remote Sensing (CEReS), Chiba University, Japan
  • Toyoshima Koichi
    Center for Environmental Remote Sensing (CEReS), Chiba University, Japan
  • Kotsuki Shunji
    Center for Environmental Remote Sensing (CEReS), Chiba University, Japan

Bibliographic Information

Other Title
  • 北海道に降雪をもたらす気団変質の近年の変動について

Abstract

<p>The Asian monsoon characterizes the winter weather in Japan. Air mass alteration plays a vital role in bringing a massive snowfall to the Sea of Japan side. The 2019/2020 winter season saw record-breaking light snowfall on the Sea of Japan side. This study analyzed recent changes in the air mass alteration in Hokkaido and its factors using observation and reanalysis data. AMeDAS, JRA55, NOAA/OISST, and radiosonde at Sapporo and Dalynerechensk, Russia, were used. The three winter seasons for analysis were 2017/2018, 2018/2019, and 2019/2020. The contribution of sensible and latent heat fluxes in 2019/2020 was more significant than the contribution from the decrease in ocean temperature difference, not from the decline in monsoon due to the weakening in wind speed. In particular, the increase in air temperature in the lower atmosphere over the Siberian Continent was the dominant contributor to the decay of air mass transformation in the Japan Sea.</p>

Journal

Keywords

Details 詳細情報について

  • CRID
    1390853509417789568
  • NII Article ID
    130008138109
  • DOI
    10.11520/jshwr.34.0_354
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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