研究分野: %25255Bja%25255D%2525CB%2525CC%2525B6%2525CB%2525B0%2525E8%2525A4%2525CB%2525A4%2525AA%2525A4%2525B1%2525A4%2525EB%2525B4%2525D1%2525C2%2525AC%25255B%25252Fja%25255D%25255Ben%25255DObservations%252523in%252523the%252523Arctic%25255B%25252Fen%25255D