About the Authors

Takahiro Iida

iida@nipr.ac.jp

Affiliations National Institute of Polar Research, Midori-cho, Tachikawa, Tokyo, Japan, Department of Polar Science, School of Multidisciplinary Sciences, Graduate University for Advanced Studies, Kanagawa, Japan

Tsuneo Odate

Affiliations National Institute of Polar Research, Midori-cho, Tachikawa, Tokyo, Japan, Department of Polar Science, School of Multidisciplinary Sciences, Graduate University for Advanced Studies, Kanagawa, Japan

Mitsuo Fukuchi

Affiliations National Institute of Polar Research, Midori-cho, Tachikawa, Tokyo, Japan, Department of Polar Science, School of Multidisciplinary Sciences, Graduate University for Advanced Studies, Kanagawa, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TI TO MF. Performed the experiments: TI. Analyzed the data: TI. Contributed reagents/materials/analysis tools: TI. Wrote the paper: TI.