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To contribute to the special observing efforts of YOPP, we implemented intensive radio sounding activities along the cruise route of XUELONG icebreaker in summer 2018. The radiosoundes were launched 2-3 times per day from July 28 to Sept 3 in the Arctic Ocean and totally 76 soundings data were shared through WMO GIS in BUFR format. BUFR files are available for download.