Drought conditions disrupt atmospheric carbon uptake in a Mediterranean saline lake DOI Creative Commons
Ihab Alfadhel, Ignacio Peralta‐Maraver, Isabel Reche

et al.

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(22), P. 5117 - 5129

Published: Nov. 18, 2024

Abstract. Inland saline lakes play a key role in the global carbon cycle, acting as dynamic zones for atmospheric exchange and storage. Given decline of expected increase periods drought climate change scenario, changes their potential capacity to uptake or emit are expected. Here, we conducted continuous measurements CO2 CH4 fluxes at ecosystem scale an endorheic lake Mediterranean region over nearly 2 years. Our focus was on determining net exchanges with atmosphere under both dry flooded conditions, using eddy covariance (EC) method. We coupled greenhouse gas flux water storage analysed meteorological variables like air temperature radiation, known influence lakes. This extensive data integration enabled projection time, accounting wet conditions interannual scale. found that system acts substantial sink by absorbing conditions. In years prolonged storage, it is predicted lake's assimilation can surpass 0.7 kg C m2 annually. Conversely, during extended years, reduction more than 80 % Regarding CH4, measured rates exceeded those well-aerated soils such forest grasslands, reaching values 0.2 µmol m−2 s−1. Additionally, observed double However, absence prevented us from correlating processes environmental predictors. study challenges widespread notion wetlands universally emitters, highlighting significant natural carbon. our work also underscores vulnerability these services current where episodes become frequent intense coming

Language: Английский

Enhanced biogenic carbon emissions in inland waterways: Insights from the Beijing-Hangzhou Grand Canal, China DOI
Boyi Liu, Lin Zhu, Runyu Zhang

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133148 - 133148

Published: March 1, 2025

Language: Английский

Citations

0
Potentially toxic elements and geochemical signatures in sediments and soils from Biritiba-Mirim reservoir, Brazil DOI

Pedro do Nascimento Gonçalves,

Sandra Regina Damatto,

Thiago Costa Silva

et al.

Environmental Nanotechnology Monitoring & Management, Journal Year: 2025, Volume and Issue: unknown, P. 101070 - 101070

Published: April 1, 2025

Language: Английский

Citations

0
Idiosyncratic phenology of greenhouse gas emissions in a Mediterranean reservoir DOI Creative Commons
Eva Rodríguez‐Velasco, Ignacio Peralta‐Maraver, Andrés Martínez‐García

et al.

Limnology and Oceanography Letters, Journal Year: 2024, Volume and Issue: 9(4), P. 364 - 375

Published: June 5, 2024

Abstract Extreme hydrological and thermal regimes characterize the Mediterranean zone can influence phenology of greenhouse gas (GHG) emissions in reservoirs. Our study examined seasonal changes GHG a shallow, eutrophic, hardwater reservoir Spain. We observed distinctive patterns for each gas. CH 4 substantially increased during stratification, influenced predominantly by increase water temperature, net ecosystem production, decline mean depth. N 2 O mirrored 's trend, significantly correlating to wind speed, gross primary production. Conversely, CO decreased stratification displayed quadratic, rather than linear relationship with temperature—an unexpected deviation from emission patterns—likely associated photosynthetic uptake bicarbonate formation intracellular calcite that might be exported sediments. This investigation highlights imperative integrating these idiosyncratic into models, enhancing their predictive power.

Language: Английский

Citations

2
Organic Matter Accumulation and Hydrology as Drivers of Greenhouse Gas Dynamics in Newly Developed Artificial Channels DOI
Lorenzo Rovelli, Clara Mendoza‐Lera, Alessandro Manfrin

et al.

Environmental Science & Technology, Journal Year: 2024, Volume and Issue: 58(19), P. 8360 - 8371

Published: May 3, 2024

Artificial channels, common features of inland waters, have been suggested as significant contributors to methane (CH4) and carbon dioxide (CO2) dynamics emissions; however, the magnitude drivers their CH4 CO2 emissions (diffusive ebullitive) remain unclear. They are characterized by reduced flow compared donor river, which results in suspended organic matter (OM) accumulation. We propose that such systems hydrological controls will be OM accumulation control promoting production outgassing. Here, we monitored summertime concentrations on six newly constructed river-fed artificial from bare riparian mineral soil lotic under two distinct regimes. Chamber-based fluxes were complemented with hydrology, total (diffusion + ebullition), assessments. During first 6 weeks after flooding, inflowing riverine water dominated over in-channel contributions. Afterwards, a substantial (≥50% channel's volume) boosted led widespread ebullition 10× higher than diffusive fluxes, regardless regime. Our finding suggests dominant pathway these anthropogenic systems, thus, impact regional might largely underestimated.

Language: Английский

Citations

1
Advancing phenology in limnology and oceanography DOI Creative Commons
Hilary A. Dugan, Zachary S. Feiner, Monika Winder

et al.

Limnology and Oceanography Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 12, 2024

Language: Английский

Citations

0
Drought conditions disrupt atmospheric carbon uptake in a Mediterranean saline lake DOI Creative Commons
Ihab Alfadhel, Ignacio Peralta‐Maraver, Isabel Reche

et al.

Biogeosciences, Journal Year: 2024, Volume and Issue: 21(22), P. 5117 - 5129

Published: Nov. 18, 2024

Abstract. Inland saline lakes play a key role in the global carbon cycle, acting as dynamic zones for atmospheric exchange and storage. Given decline of expected increase periods drought climate change scenario, changes their potential capacity to uptake or emit are expected. Here, we conducted continuous measurements CO2 CH4 fluxes at ecosystem scale an endorheic lake Mediterranean region over nearly 2 years. Our focus was on determining net exchanges with atmosphere under both dry flooded conditions, using eddy covariance (EC) method. We coupled greenhouse gas flux water storage analysed meteorological variables like air temperature radiation, known influence lakes. This extensive data integration enabled projection time, accounting wet conditions interannual scale. found that system acts substantial sink by absorbing conditions. In years prolonged storage, it is predicted lake's assimilation can surpass 0.7 kg C m2 annually. Conversely, during extended years, reduction more than 80 % Regarding CH4, measured rates exceeded those well-aerated soils such forest grasslands, reaching values 0.2 µmol m−2 s−1. Additionally, observed double However, absence prevented us from correlating processes environmental predictors. study challenges widespread notion wetlands universally emitters, highlighting significant natural carbon. our work also underscores vulnerability these services current where episodes become frequent intense coming

Language: Английский

Citations

0