Carbon dioxide uptake in a eutrophic stratified reservoir: Freshwater carbon sequestration potential DOI Creative Commons

J. SAKAGUCHI,

Keisuke Nakayama, Katsuaki KOMAI

и другие.

Heliyon, Год журнала: 2023, Номер 9(10), С. e20322 - e20322

Опубликована: Сен. 20, 2023

Carbon capture and storage due to photosynthesis activities has been proposed as a carbon sink mitigate climate change. To enhance such mitigation, previous studies have shown that freshwater lakes should be included in the sink, since they may much coastal areas. In eutrophic lakes, there is uncertainty about whether equilibrium equation can estimate partial pressure of dioxide (pCO2), owing presence phytoplankton, pH measurement error fluid. Thus, this study investigated applicability revealed need modify it. The modified was successfully applied reproduce pCO2 based on total alkalinity through field observations. addition, at water surface lower than atmospheric by phytoplankton during strong stratification. stratification effect low verified using Net Ecosystem Production (NEP) model, submerged plants Potamogeton malaianus were found high potential for dissolved inorganic (DIC) sequestration lake. These results provide starting point toward more sophisticated methods investigate DIC uptake stratified lakes.

Язык: Английский

A Spatially Integrated Dissolved Inorganic Carbon (SiDIC) Model for Aquatic Ecosystems Considering Submerged Vegetation DOI Creative Commons

Kazuki Nagatomo,

Keisuke Nakayama, Katsuaki KOMAI

и другие.

Journal of Geophysical Research Biogeosciences, Год журнала: 2023, Номер 128(2)

Опубликована: Фев. 1, 2023

Abstract Net ecosystem production (NEP) by submerged aquatic vegetation plays a substantial role in capturing atmospheric carbon dioxide into ecosystems. In lakes and estuaries, the net uptake of is mediated stratification water column which suppresses vertical flux between upper lower layers. The presence can also affect strength such that interactions vegetation, stratification, NEP moderate emissions. Since occur there need for new numerical approach able to consider effect on NEP, dioxide. This study aims develop model investigate how density flexibility, affects partial pressure ( p CO 2 ) dissolved inorganic (DIC). After initial parameterization coefficients based experimental work, horizontal variations DIC were successfully modeled spatially (horizontally) integrated (SiDIC) model, was validated with field observations from an estuarine freshwater lake case study. SiDIC reproduce changes daytime nighttime throughout column. Sensitivity tests showed fluctuation controlled suppression due vegetation. results highlight importance resolving vegetation‐induced when modeling budget within coastal environments.

Язык: Английский

Процитировано

14
Carbon dioxide uptake in a eutrophic stratified reservoir: Freshwater carbon sequestration potential DOI Creative Commons

J. SAKAGUCHI,

Keisuke Nakayama, Katsuaki KOMAI

и другие.

Heliyon, Год журнала: 2023, Номер 9(10), С. e20322 - e20322

Опубликована: Сен. 20, 2023

Carbon capture and storage due to photosynthesis activities has been proposed as a carbon sink mitigate climate change. To enhance such mitigation, previous studies have shown that freshwater lakes should be included in the sink, since they may much coastal areas. In eutrophic lakes, there is uncertainty about whether equilibrium equation can estimate partial pressure of dioxide (pCO2), owing presence phytoplankton, pH measurement error fluid. Thus, this study investigated applicability revealed need modify it. The modified was successfully applied reproduce pCO2 based on total alkalinity through field observations. addition, at water surface lower than atmospheric by phytoplankton during strong stratification. stratification effect low verified using Net Ecosystem Production (NEP) model, submerged plants Potamogeton malaianus were found high potential for dissolved inorganic (DIC) sequestration lake. These results provide starting point toward more sophisticated methods investigate DIC uptake stratified lakes.

Язык: Английский

Процитировано

4