Fate of methane in the Hudson River and Estuary

Angelis, Marie A. de; Scranton, Mary I.

doi:10.1029/93gb01636

Cited by 137 publications

(122 citation statements)

References 22 publications

Supporting

Mentioning

105

Contrasting

Order By: Relevance

“…Compared with emission rates reported in other literature (5.4 mg m-* d-l in summer and 12 1.6 during fall overturn at Lake 227, Rudd and Hamilton 1978;31.3 in summer and 38.4 during fall overturn at Lake Mendota, Fallon et al 1980), Lake Nojiri fluxes during overturn period appear to be low. The diffusive fluxes in this study were comparable to or slightly lower than those measured by Schmidt and Conrad (1993) for Lake Constance, by de Angelis and Lilley (1987) for Oregon rivers, and by de Angelis and Scranton (1993) for the Hudson River.…”

Section: Resultsmentioning

confidence: 59%

Dynamics of dissolved methane and methane oxidation in dimictic Lake Nojiri during winter

Utsumi

Nojiri

Nakamura

et al. 1998

Limnology & Oceanography

View full text Add to dashboard Cite

Changes in the vertical distribution of dissolved CH, were monitored during the autumnal lake overturn period in mesotrophic Lake Nojiri, Japan (4.4 km* in area and 9.4 X 10' m3 in vol). A survey in 1992 revealed that the surface CH, concentration was highest in December, when the lake overturned. During the following two winters (1993-1994 and 1994-1995) we carried out detailed sampling during the autumnal overturn period. As a result of lake overturn in mid-December, CH, that had accumulated in the hypolimnion during the stratification period mixed rapidly throughout the water column. Increased CH, in the epilimnion quickly disappeared after the overturn as a result of the rising of CH, oxidation activity throughout the water column. The in situ-specific CH, oxidation rate peaked at 0.274, 0.235, and 1.01 d-' at 0.5, 20, and 36 m, respectively, during the overturn, and then declined the following month. During this period, the diffusive flux of methane across the air-water interface increased but was not the dominant sink (avg rate of 4.5 kg lake-' d-l); instead, methane oxidation in the water column was the dominant CH, sink (avg rate of 67.8 kg lake-' d-l), removing -94% of the CH, during the overturn period. A significant methane flux from the bottom sediments throughout the overturn period was confirmed but decreased gradually as the overturn proceeded. The production of organic carbon as a result of CH, oxidation in the water column by methanotrophs was comparable in extent to that generated by primary production at that time.

show abstract

Section: Resultsmentioning

confidence: 59%

Dynamics of dissolved methane and methane oxidation in dimictic Lake Nojiri during winter

Utsumi

Nojiri

Nakamura

et al. 1998

Limnology & Oceanography

View full text Add to dashboard Cite

show abstract

“…These values are within but in the lower end of the range of diffusive air-water CH 4 fluxes from temperate rivers (0-21562 lmol m -2 day -1 ) (De Angelis and Scranton 1993;Lilley et al 1996;Jones and Mulholland 1998a, b;Hope et al 2001;Abril and Iversen 2002). The emission of CH 4 from the three studied rivers was distinctly lower than the emission of CH 4 from the Amazon River (ranging from 4625 to 12562 lmol m -2 day -1 , Bartlett et al 1990).…”

Section: Description Of Study Areamentioning

confidence: 83%

“…Moreover, the increase of salinity during the high dry season (March) (Figs. 5,6) might inhibit the activity of methanotrophic bacteria in surface waters (De Angelis and Scranton 1993). Further, the shallower aerobic mixed layer during the high dry season reduces the probability of CH 4 oxidation compared to the other seasons when the mixed layer is deeper.…”

Section: Description Of Study Areamentioning

confidence: 99%

“…This reflects the dominance of CH 4 outgassing and/or CH 4 oxidation over CH 4 production in these areas. The ratio between CH 4 oxidation and CH 4 outgassing is affected by several environmental conditions such as increasing depth and turbidity that favour CH 4 oxidation, increasing salinity that inhibits CH 4 oxidation, and increasing wind and tidal currents that enhance CH 4 outgassing (De Angelis and Scranton 1993;Abril and Iversen 2002;Abril et al 2007). In some cases, an intermediate CH 4 maximum also occurs at the river-estuary transition where low hydrodynamics might favour local sedimentation of organic material and CH 4 production (Upstill-Goddard et al 2000;Abril et al 2007).…”

Section: Description Of Study Areamentioning

confidence: 99%

“…The emission of CH 4 to the atmosphere usually dominates bacterial oxidation by a factor of 1-20 (De Angelis and Scranton 1993;Lilley et al 1996;Abril and Iversen 2002;Abril and Borges 2004). In addition, methanotrophic activity in estuaries is strongly inhibited by salinity (Scranton and McShane 1991;De Angelis and Scranton 1993), but is enhanced by high turbidity (Abril et al 2007). Hence, CH 4 oxidation is generally confined to the upper reaches of estuaries, where salinity is low and turbidity is high, and where CH 4 concentrations are also often highest (Middelburg et al 2002;Abril et al 2007).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal variability of methane in the rivers and lagoons of Ivory Coast (West Africa)

et al. 2010

View full text Add to dashboard Cite

We report a data-set of dissolved methane (CH 4 ) in three rivers (Comoé, Bia and Tanoé) and five lagoons (Grand-Lahou, Ebrié, Potou, Aby and Tendo) of Ivory Coast (West Africa), during the four main climatic seasons (high dry season, high rainy season, low dry season and low rainy season). The surface waters of the three rivers were over-saturated in CH 4 with respect to atmospheric equilibrium (2221-38719%), and the seasonal variability of CH 4 seemed to be largely controlled by dilution during the flooding period. The strong correlation of CH 4 concentrations with the partial pressure of CO 2 (pCO 2 ) and dissolved silicate (DSi) confirm the dominance of a continental sources (from soils) for both CO 2 and CH 4 in these rivers. Diffusive air-water CH 4 fluxes ranged between 25 and 1187 lmol m -2 day -1 , and annual integrated values were 288 ± 107, 155 ± 38, and 241 ± 91 lmol m -2 day -1 in the Comoé, Bia and Tanoé rivers, respectively. In the five lagoons, surface waters were also over-saturated in CH 4 (ranging from 1496 to 51843%). Diffusive air-water CH 4 fluxes ranged between 20 and 2403 lmol m -2 day -1 , and annual integrated values were 78 ± 34, 338 ± 217, 227 ± 79, 330 ± 153 and 326 ± 181 lmol m -2 day -1 in the Grand-Lahou, Ebrié, Potou, Aby and Tendo lagoons, respectively. The largest CH 4 oversaturations were observed in the Tendo and Aby lagoons that are permanently stratified systems (unlike the other three lagoons), leading to anoxic bottom waters favorable for a large CH 4 production. In addition, these two stratified lagoons showed low pCO 2 values due to high primary production, which suggests an efficient transfer of organic matter across the pycnocline. As a result, the stratified Tendo and Aby lagoons were respectively, a low source of CO 2 to the atmosphere and a sink of atmospheric CO 2 while the other three well-mixed lagoons were strong sources of CO 2 to the atmosphere but less oversaturated in CH 4 .

show abstract

Impact of increasing inflow of warm Atlantic water on the sea‐air exchange of carbon dioxide and methane in the Laptev Sea

et al. 2016

View full text Add to dashboard Cite

The Laptev Sea is generally a sink for atmospheric carbon dioxide and a source of methane to the atmosphere. We investigate how sensitive the net sea-air exchange of carbon dioxide and methane in the Laptev Sea are to observed changes in the inflow of Atlantic water into the Arctic Ocean and in atmospheric conditions occurring after 1990. Using a time-dependent coupled physical-biogeochemical column model, both the physical and biogeochemical effects are investigated in a series of sensitivity experiments. The forcing functions are kept constant at 40 year climatological values except successively selected drivers that vary in time. Their effects are examined by comparing two periods, 1971-1989 and 1991-2009. We find that the flux of carbon dioxide is more sensitive to the increased Atlantic water inflow than the methane exchange. The increased volume transport of water in the Atlantic layer increases the ocean net uptake of carbon dioxide more than the warming of the incoming bottom water as the vertical advection is enhanced in the first case. The methane cycling is mainly affected by the increase in temperature, irrespective of whether the warming originates from the atmosphere or the incoming bottom water, causing increased outgassing to the atmosphere. In summary, our results suggest that the observed changes in the atmosphere and ocean potentially had a substantial impact on carbon dioxide uptake on the Siberian Shelf. However, the results suggest that the impact on the outgassing of methane might have been relatively modest compared to the interannual variability of sea-air fluxes of methane.

show abstract

Fate of methane in the Hudson River and Estuary

Cited by 137 publications

References 22 publications

Dynamics of dissolved methane and methane oxidation in dimictic Lake Nojiri during winter

Dynamics of dissolved methane and methane oxidation in dimictic Lake Nojiri during winter

Seasonal variability of methane in the rivers and lagoons of Ivory Coast (West Africa)

Impact of increasing inflow of warm Atlantic water on the sea‐air exchange of carbon dioxide and methane in the Laptev Sea

Contact Info

Product

Resources

About