MODELING OF AIR-SEA GAS TRANSFER VELOCITY AND ITS QUANTITATIVE IMPACT ON EVALUATION OF CARBON DIOXIDE EXCHANGE ACROSS SEA SURFACE

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420528
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Hydraulic engineering
• Research Institution: Kyushu University
• Principal Investigator: SUGIHARA YUJI 九州大学, 総合理工学研究科(研究院), 准教授 (70243970)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: ガス交換 / 風波 / 砕波 / 乱流 / 二酸化炭素 / 地球温暖化 / 地球環境水理学 / 界面水理学

Outline of Final Research Achievements

Modeling of the air-sea gas transfer velocity has been investigated by means of numerical simulations, laboratory experiments and field observations. An atmosphere-wave coupled numerical simulation using meteorological and wave models, i.e., WRF and SWAN has been carried out to evaluate the validity of a wave-dependent hybrid model for the gas transfer velocity of carbon dioxide including breaking wind-wave parameters. The results of the mapping of the gas transfer velocity show that such a wave-dependent hybrid model gives a quantitative impact on the evaluation of carbon dioxide exchange across the sea surface. Also, the model expression and the model constants of the hybrid model have been modified on the basis of field observation data.

Free Research Field

地球環境水理学