About the Authors

Koji Seike

seike@aori.u-tokyo.ac.jp

Affiliation Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan

Kotaro Shirai

Affiliation Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan

Yukihisa Kogure

Affiliation Atmosphere and Ocean Research Institute, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba, Japan

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: K. Seike K. Shirai YK. Performed the experiments: K. Seike K. Shirai YK. Analyzed the data: K. Seike K. Shirai YK. Contributed reagents/materials/analysis tools: K. Seike K. Shirai YK. Wrote the paper: K. Seike K. Shirai YK. Performed the field survey: K. Seike K. Shirai YK.