夏季から結氷期の波浪情報の取得のため、波浪ブイを投入する。開水面での波浪、10月以降の結氷による薄氷形成に伴う波の減衰過程等を取得し、海氷-波浪モデルの検証データとして活用する。 Two drifting type wave buoys were deployed during the JAMSTEC Mirai cruise in September 2016. The buoys were deployed off Barrow Alaska on Sept. 10th and lasted until Nov. 2. Both buoys followed almost the same trajectories until they started to separate, but still remained in the same area. On Sept. 19th, a storm approached the area, and significant wave height exceeding 4 m was observed. The possible meteorological causes of this high sea state will be investigated.

The buoy motion is detected by the 9-axis motion sensor unit, processed onboard, and wave parameters are transmitted by Iridium satellite communication. The data acquisition is 40 minutes long. The sampling interval is typically set to 3 hours, and during an event, is switched to 1 hour. The filter characteristic of the acceleration affects the significant wave height and the sensitivity of the results to the choice of filter characteristics will be studied. The estimated wave parameters will be used to validate the wave model.

結氷期から真冬のデータを取得するため、波浪ブイの投入を試み、波浪予測における海況のリファレンスデータを得る。 The wave buoy deployments will be scheduled during the JAMSTEC Mirai cruise in early winter 2019 over Chukchi sea.

The buoy motion is detected by the 9-axis motion sensor unit, processed onboard, and wave parameters are transmitted by Iridium satellite communication. The data acquisition is 40 minutes long. The sampling interval is typically set to 3 hours, and during an event, is switched to 1 hour. The filter characteristic of the acceleration affects the significant wave height and the sensitivity of the results to the choice of filter characteristics will be studied. The estimated wave parameters will be used to validate the wave model.