Field observation on blue carbon dynamics in the Yatsushiro Sea considering influence of stratification

Naoki Saito, Xion Bing, Hiroto Komori, Shinichiro Yano, Keisuke Nakayama, Katsuaki Komai, Kei Yajima

Research output: Contribution to conferencePaperpeer-review

Abstract

Recently, blue carbon, which is the carbon fixed by marine living organism has attracted attention as a new measure to mitigate climate change. In order to estimate the fixed amount of blue carbon, the partial pressure of CO2 (pCO2) in seawater is important. In this study, we carried out field observation in the Yatsushiro Sea and tried to reveal the actual dynamics of pCO2 in a coastal region. In addition, from observation in the conditions with different mixing condition, that is, strong stratification, weak one, and well-mixed, we tried to reveal the effects of stratification on pCO2 in seawater. As a result, it was confirmed that the effects of photosynthesis by flora and calcification by corals on the fluctuation of pCO2. Moreover, we revealed that the effect of photosynthesis of phytoplankton was concentrated in the surface layer. Furthermore, in the strong stratification period, it was suggested that pCO2 in seawater was able to be fluctuated due to the inflow of seawater from a coral habitats area.

Original languageEnglish
Publication statusPublished - 2020
Event22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020 - Sapporo, Virtual, Japan
Duration: Sep 14 2020Sep 17 2020

Conference

Conference22nd Congress of the International Association for Hydro-Environment Engineering and Research-Asia Pacific Division: Creating Resilience to Water-Related Challenges, IAHR-APD 2020
Country/TerritoryJapan
CitySapporo, Virtual
Period9/14/209/17/20

All Science Journal Classification (ASJC) codes

  • Ecology
  • Environmental Engineering

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