Arctic Research Directory

ID-107 :   Wave buoy observation

Type

FIELDWORK

Research/Observation Title

Wave buoy observation

Science Summary (common)

北極海における氷海航路の環境・安全性評価を行うためには、北極海における波浪予測手法の開発が必要である。本研究では、「みらい」の北極航海で波浪ブイを用いて北極海の波浪データの取得を行う。本取得データは海氷-波浪モデルの検証データとして活用する。また波浪の気象要因、氷縁位置との関係などについて精査する。また、北極海における航路選定に資する波浪推算モデルの出力を、当該観測データと比較・検証も行う。時間変動する氷縁や風の場を考慮した波浪スペクトルの予測精度向上のため、外力となる大気・海氷モデルに対する波浪推算の感度実験を行う。既存データを活用した精度検証も実施する。

Principal Investigator

Takuji Waseda
The University of Tokyo
waseda@k.u-tokyo.ac.jp
- Individual Project Information 1/3 Research/Observation Period 2016-09-10 〜 2016-11-02

Science Summary

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.

Discipline(s)

Meteorology and Climate, Oceanography

Personnel

RollContact PersonNameTakuji WasedaAffiliationThe University of TokyoCountryJapanEmailwaseda@k.u-tokyo.ac.jp
RollContact PersonNameAdrean WebbAffiliationThe University of TokyoCountryJapanEmailadrean.webb@gmail.com

Research/Observation Methods

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.

Research/Observation Period

2016-09-10 〜 2016-11-02

Research/Observation Area

N: 80.000000, S: 70.000000, W: -170.000000 E: -140.000000,
- Individual Project Information 2/3 Research/Observation Period 2018-10-24 〜 2018-12-07

Science Summary

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 2018 over Chukchi sea.

Discipline(s)

Meteorology and Climate, Oceanography

Personnel

RollContact PersonNameTakuji WasedaAffiliationThe University of TokyoCountryJapanEmailwaseda@k.u-tokyo.ac.jp

Research/Observation Methods

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.

Research/Observation Period

2018-10-24 〜 2018-12-07

Research/Observation Area

N: 80.000000, S: 70.000000, W: -170.000000 E: -140.000000,
- Individual Project Information 3/3 Research/Observation Period 2019-09-27 〜 2019-11-10

Science Summary

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.

Discipline(s)

Meteorology and Climate, Oceanography

Personnel

RollContact PersonNameTakuji WasedaAffiliationThe University of TokyoCountryJapanEmailwaseda@k.u-tokyo.ac.jp

Research/Observation Methods

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.

Research/Observation Period

2019-09-27 〜 2019-11-10

Research/Observation Area

N: 80.000000, S: 70.000000, W: -170.000000 E: -140.000000,
Data Registration
01:53 on Tue December 27, 2016
Last Update
17:50 on Wed August 15, 2018