Year-round CO2 emissions from the drawdown area of a tropical reservoir: Strong seasonal and spatial variation DOI Creative Commons
Ícaro Barbosa, José R. Paranaíba, Sebastian Sobek

et al.

Geoderma, Journal Year: 2024, Volume and Issue: 445, P. 116891 - 116891

Published: April 18, 2024

A growing body of literature points to drawdown areas as important sources atmospheric CO2 within reservoirs. Yet seasonal and temporal patterns flux from periodically exposed sediments in remain poorly understood. Here we evaluate the annual diel (24-hour cycle) variations emissions atmosphere. We sampled area a tropical reservoir, which encompassed two primary adjacent land covers—grassland forestland—in watershed reservoir located southeastern Brazil. also experimentally assessed effect rewetting on sediments. found large during all hydrological periods (from 10 10116 mg C/m−2(−|-) d-1), except for late rainy period. Land use how distant dry were open water significantly affected emissions, with higher occurring surrounded by forest than those grassland. Our diel-cycle analysis did not show significant variation over daily cycles. Furthermore, experiment indicated increase 30 min after onset event. Although only cover 20 % reservoir's area, they account 80 total emissions. Ultimately, single-time measurements can lead considerable underestimation (up 52 %) or overestimation 190 whole-reservoir

Language: Английский

Imbalance of sediment transport in a meso-tidal bay: effect of tidal pumping and residual circulation DOI Creative Commons

Su In Kim,

Jun Young Seo,

Jae‐Hun Park

et al.

Frontiers in Marine Science, Journal Year: 2024, Volume and Issue: 11

Published: April 11, 2024

In-situ mooring systems with acoustic Doppler current profilers were installed in the western (TM01) and eastern (TM02) parts of Yeosu Bay from September 3 to October 2, 2021, understand controlling mechanisms suspended sediment transport. In bay, freshwater Seomjin River freely exchanges seawater open sea. Over period, flows mainly dominated by ebb tides. Power spectral density analysis concentration (SSC) exhibited a quarter-diurnal (6.21 h) frequency at TM01 semi-diurnal (12.42 TM02. The results suggested that SSC variations part driven primarily local resuspension, while they influenced predominantly horizontal advection part. Differences variation two stations could be due physical properties bed sediments (TM01: sandy mud containing shell fragments, TM02: mud). Such over tidal cycles caused an imbalance At TM01, fluxes dominantly seaward pumping (88% total) discharge surface layer residual circulation. TM02, landward (73% total). Although tended compensated balanced mutually circulation entire TM02 approximately twice higher than those TM01. This was difference asymmetry between flood stations. transport vary spatially, relative contribution result

Language: Английский

Citations

6
Mitigating inland waters’ greenhouse gas emissions: current insights and prospects DOI Creative Commons
José R. Paranaíba, Sarian Kosten

Inland Waters, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 14

Published: July 9, 2024

Language: Английский

Citations

4
Summer CH4 ebullition strongly determines year-round greenhouse gas emissions from agricultural ditches despite frequent dredging DOI Creative Commons
José R. Paranaíba, Quinten Struik,

Saumya Shendurnikar

et al.

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 373, P. 123813 - 123813

Published: Dec. 24, 2024

Recent studies indicate that greenhouse gas (GHG) emissions from agricultural drainage ditches can be significant on a per-unit area basis, but spatiotemporal investigations are still limited. Additionally, the impact of dredging - common management in such environments ditch GHG is largely unknown. This study presents year-round nine dairy farm center Netherlands, where each year, approximately half dredged alternating cycles. We measured monthly diffusive fluxes carbon dioxide (CO

Language: Английский

Citations

1
Year-round CO2 emissions from the drawdown area of a tropical reservoir: Strong seasonal and spatial variation DOI Creative Commons
Ícaro Barbosa, José R. Paranaíba, Sebastian Sobek

et al.

Geoderma, Journal Year: 2024, Volume and Issue: 445, P. 116891 - 116891

Published: April 18, 2024

A growing body of literature points to drawdown areas as important sources atmospheric CO2 within reservoirs. Yet seasonal and temporal patterns flux from periodically exposed sediments in remain poorly understood. Here we evaluate the annual diel (24-hour cycle) variations emissions atmosphere. We sampled area a tropical reservoir, which encompassed two primary adjacent land covers—grassland forestland—in watershed reservoir located southeastern Brazil. also experimentally assessed effect rewetting on sediments. found large during all hydrological periods (from 10 10116 mg C/m−2(−|-) d-1), except for late rainy period. Land use how distant dry were open water significantly affected emissions, with higher occurring surrounded by forest than those grassland. Our diel-cycle analysis did not show significant variation over daily cycles. Furthermore, experiment indicated increase 30 min after onset event. Although only cover 20 % reservoir's area, they account 80 total emissions. Ultimately, single-time measurements can lead considerable underestimation (up 52 %) or overestimation 190 whole-reservoir

Language: Английский

Citations

0