Coupled micrometeorological and biological processes on atmospheric CO2 concentrations at the land–ocean boundary, NE coast of India

Ganguly, Dipnarayan; Dey, Munmun; Chowdhury, Chumki; Pattnaik, Asim A.; Sahu, Biraja Kumar; Jana, T. K.

doi:10.1016/j.atmosenv.2010.08.047

Cited by 27 publications

(16 citation statements)

References 32 publications

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“…Similar findings have been previously found in other locations [e.g., Jiang et al, 2008;Maher and Eyre, 2012]. According to the estimates derived from Ganguly et al [2011], the Mahandi Estuary lying close to the Hugli and the Matla in the eastern coast of India exhibited a mean emission of 2.6 mol C m À2 yr À1 . In contrast, Sarma et al [2011] observed a high mean annual efflux of 56.2 mol C m À2 yr À1 from the Godavari Estuary located in the east coast of India.…”

Section: Comparison Of Air-water Co 2 Flux With Other Estuariessupporting

confidence: 89%

A comparison of CO₂ dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

Akhand

Chanda

Manna

et al. 2016

Geophysical Research Letters

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The fugacity of CO2 (fCO2 (water)) and air‐water CO2 flux were compared between a river‐dominated anthropogenically disturbed open estuary, the Hugli, and a comparatively pristine mangrove‐dominated semiclosed marine estuary, the Matla, on the east coast of India. Annual mean salinity of the Hugli Estuary (≈7.1) was much less compared to the Matla Estuary (≈20.0). All the stations of the Hugli Estuary were highly supersaturated with CO2 (annual mean ~ 2200 µatm), whereas the Matla was marginally oversaturated (annual mean ~ 530 µatm). During the postmonsoon season, the outer station of the Matla Estuary was under saturated with respect to CO2 and acted as a sink. The annual mean CO2 emission from the Hugli Estuary (32.4 mol C m−2 yr−1) was 14 times higher than the Matla Estuary (2.3 mol C m−2 yr−1). CO2 efflux rate from the Hugli Estuary has increased drastically in the last decade, which is attributed to increased runoff from the river‐dominated estuary.

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Section: Comparison Of Air-water Co 2 Flux With Other Estuariessupporting

confidence: 89%

A comparison of CO₂ dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

Akhand

Chanda

Manna

et al. 2016

Geophysical Research Letters

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“…The low fCO 2 (water) value was observed during post-monsoon (469 ± 83 μatm) due to less input of terrestrial carbon. The fCO 2 (water) value observed was somehow close to the previous report (~615-1807 μatm) by Ganguly et al [36]. However, the concentration of CO 2 in other Indian estuaries was found to vary widely: Godavari estuary-~221-34026 μatm [37], Hooghly estuary-234-518 μatm [38],…”

Section: Co 2 Dynamicssupporting

confidence: 88%

Intra-annual Variability of CO2 Flux in the Mahanadi Estuary- A Tropical Estuarine System, India

Satapathy¹,

Pattanaik²,

Sahoo³

et al. 2017

Ann Mar Sci

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The inorganic carbon dynamics and the CO 2 fl ux of estuarine system are strongly infl uenced by the productivity and nutrient regime of water. This study provides full seasonal coverage of assessment of the physicochemical variables of Mahanadi estuary, mainly focusing on the carbonate system through the measurement of pH, Total Alkalinity (TA), Dissolved Inorganic Carbon (DIC), both aqueous and air fCO 2 , Dissolved Oxygen (DO) and chlorophyll a (chl a). The relationship of TA and DIC were found conservative throughout the study period. The estuary was found to be over-saturated with CO 2 and acted as a net source. However, the magnitude of fl ux varied from season to season with a range between-8.14 to 58.09 μmol m-2 h-1 indicating ephemeral sink phase in the estuary. The air-water CO 2 fl ux was primarily governed by fCO 2 (water) although other factors such as temperature, pH, salinity, total alkalinity, wind speed and fCO 2 (air) noticeably affected CO 2 fl ux. A strong positive correlation was observed between temperature and inorganic nutrients during the study period. The study of net ecosystem metabolism justifi es the heterotrophic nature of Mahanadi estuarine system.

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“…North American terrestrial carbon budgets can be inferred using observations of the CO 2 continental inflow on the Pacific coast and outflow on the Atlantic coast. While Pacific coast observations under westerly winds provide a basis for the inflow observation, significant noise is introduced into these measurements from ecosystem sources and sinks that are adjacent to the coastal observatories (Ganguly et al, ; Riley et al, ). Significant terrestrial CO 2 fluxes in coastal systems have been observed by high‐resolution, top‐down analysis (Ahmadov et al, ; Göckede et al, ; Gourdji et al, ).…”

Section: Discussionmentioning

confidence: 99%

Plant Uptake of Atmospheric Carbonyl Sulfide in Coast Redwood Forests

et al. 2017

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The future resilience of coast redwoods (Sequoia sempervirens) is now of critical concern due to the detection of a 33% decline in California coastal fog over the 20th century. However, ecosystem‐scale measurements of photosynthesis and stomatal conductance are challenging in coast redwood forests, making it difficult to anticipate the impacts of future changes in fog. To address this methodological problem, we explore coastal variations in atmospheric carbonyl sulfide (COS or OCS), which could potentially be used as a tracer of these ecosystem processes. We conducted atmospheric flask campaigns in coast redwood sites, sampling at surface heights and in the canopy (~70 m), at the University of California Landels‐Hill Big Creek Reserve and Big Basin State Park. We simulated COS atmosphere‐biosphere exchange with a high‐resolution 3‐D model to interpret these data. Flask measurements indicated a persistent daytime drawdown between the coast and the downwind forest (45 ± 6 ppt COS) that is consistent with the expected relationship between COS plant uptake, stomatal conductance, and gross primary production. Other sources and sinks of COS that could introduce noise to the COS tracer technique (soils, anthropogenic activity, nocturnal plant uptake, and surface hydrolysis on leaves) are likely to be small relative to daytime COS plant uptake. These results suggest that COS measurements may be useful for making ecosystem‐scale estimates of carbon, water, and energy exchange in coast redwood forests.

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Coupled micrometeorological and biological processes on atmospheric CO2 concentrations at the land–ocean boundary, NE coast of India

Cited by 27 publications

References 32 publications

A comparison of CO₂ dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

A comparison of CO₂ dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

Intra-annual Variability of CO2 Flux in the Mahanadi Estuary- A Tropical Estuarine System, India

Plant Uptake of Atmospheric Carbonyl Sulfide in Coast Redwood Forests

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Coupled micrometeorological and biological processes on atmospheric CO2 concentrations at the land–ocean boundary, NE coast of India

Cited by 27 publications

References 32 publications

A comparison of CO2 dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

A comparison of CO2 dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

Intra-annual Variability of CO2 Flux in the Mahanadi Estuary- A Tropical Estuarine System, India

Plant Uptake of Atmospheric Carbonyl Sulfide in Coast Redwood Forests

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A comparison of CO₂ dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary

A comparison of CO₂ dynamics and air‐water fluxes in a river‐dominated estuary and a mangrove‐dominated marine estuary