Characteristics of greenhouse gas emission in the Yellow River Delta wetland

Chen, Qing-Feng; Ma, Junjian; Liu, Jianhua; Zhao, Changsheng; Liu, Wei

doi:10.1016/j.ibiod.2013.04.009

Cited by 24 publications

(17 citation statements)

References 18 publications

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“…After sampling, CO 2 , CH 4 , and N 2 O concentrations were measuredusing a 7890A gas chromatograph (Agilent Technologies Co. Ltd., Palo Alto, CA, USA). The gas flux was calculated by the following equation [40]: where F represents the gas flux (mg¨m´2¨h´1); M is the molar mass of the gas to be measured; H is the height from the soil surface to the top of the chamber; V 0 is the molar volume of the gas; P is the atmospheric pressure at sampling site; T is the absolute temperature; P 0 and T 0 are air pressure and absolute temperature under the standard state condition; dc/dt is the rate of change in gas concentration. As a comparison among the treatments, estimated annual cumulative fluxes of GHGs were calculated by multiplying monthly mean fluxes by time.…”

Section: Measurement Of Ghg Fluxesmentioning

confidence: 99%

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Thinning Intensity Affects Soil-Atmosphere Fluxes of Greenhouse Gases and Soil Nitrogen Mineralization in a Lowland Poplar Plantation

Fang

Lin

Tian

et al. 2016

Forests

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Abstract:Thinning is one of the intensive forest management techniques commonly applied to increase the merchantable timber volume. However, how thinning affects soil-atmospheric fluxes of greenhouse gases (GHGs) is poorly understood. A field experiment with four treatments (CK: unthinned; MB: medium intensity thinning from below; HB: high intensity thinning from below; and HI: high intensity thinning by removing every alternative row of trees) was conducted to assess the impact of thinning regimes on soil-atmospheric fluxes of GHGs (CO 2 , CH 4 , and N 2 O) and soil nitrogen mineralization in a poplar plantation established on a lowland. Thinning significantly increased soil water content and water table in the high thinning treatments (HB and HI) and tended to increase soil temperature (p < 0.10). The result of the one-year study showed that estimated annual emissions of CO 2 and CH 4 were higher in HB and HI than in other treatments, while the highest emission of N 2 O was in the CK. The thinning treatments increased the annual emission of CO 2 by 23%-64% and that of CH 4 by 190%-1200%, but decreased that of N 2 O by 41%-62%. Thinning increased annual N mineralization by 50.3% in HI and 30.1%in HB. Changes in soil temperature and water table drove CO 2 , CH 4 , and N 2 O emissions, while soil water content was the most important factor driving CH 4 emission. We conclude that the moderate thinning (MB) regime is the best thinning option to minimize the impact on GHG emissions for lowland poplar plantations with similar conditions to those tested in this study.

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Section: Measurement Of Ghg Fluxesmentioning

confidence: 99%

Section: Variation In Soil Environmental Factorsmentioning

confidence: 99%

Thinning Intensity Affects Soil-Atmosphere Fluxes of Greenhouse Gases and Soil Nitrogen Mineralization in a Lowland Poplar Plantation

Fang

Lin

Tian

et al. 2016

Forests

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“…The second source of uncertainty is the difference of estimated emission factors. We reviewed 2368 research articles about China's carbon emissions on the Web of Science published during 2004-2014, We found that most of the previous researches have collected emission factors from the IPCC or China's National Development and Reform Commission (NDRC), whereas fewer than ten studies (less than 1% of total studies) have adopted emission factors based on experiments and field measurements [44][45][46][47][48][49]. The study show that emission factors from different sources can differ by as much as 40% [31].…”

Section: Introductionmentioning

confidence: 99%

New provincial CO2 emission inventories in China based on apparent energy consumption data and updated emission factors

et al. 2016

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“…Tidal soil is neutral or alkalescence, and is mainly distributed along the river and south central plains. Salt soil distributes in the coastal areas, with a small amount of salt cultivated [10]. …”

Section: Site Descriptionmentioning

confidence: 99%

“…The monitoring sites and Lland use characteristics of the Yellow River Delta Wetland were shown in Figure2, Table 1 and Table 2 [10]. There were 10 sites of soil samples and 5 kinds of typical salt marsh plant communities as carbon emissions monitoring site, including beaches bare land, Suaeda salsa community, mixed community of Phragmites australis and Suaeda salsa, Phragmites australis community, Tamnrix chinesi community and farmland community.…”

Section: Sampling Sites Selectionmentioning

confidence: 99%

The Spatial and Temporal Variation Characteristics of CH<sub>4</sub> and CO<sub>2</sub> Emission Flux under Different Land Use Types in the Yellow River Delta Wetland

Chen¹,

Ma²,

Zhao³

et al. 2015

GEP

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The Yellow River Delta Wetland is one of the youngest wetlands, and also the most complete, extensive wetlands in China. The wetland in this delta is ecologically important due to their hydrologic attributes and their roles as ecotones between terrestrial and aquatic ecosystems. In the study, the spatial and temporal variation characteristics of CH4 and CO2 emission flux under five kinds of land use types in the wetland were investigated. The results indicated that the greenhouse gas emission flux, especially the CO2 and CH4, showed distinctly spatial and temporal variation under different land use types in the wetland. In the spring, the emission flux of CO2 was higher than that of CO2 in the autumn, and appeared negative in HW3 and HW4 in the autumn. CH4 emission flux of HW4 and HW5 was negative in the spring and autumn, which indicated that the CH4 emission process was net absorption. Among the five kinds of land use types, the CO2 emission flux of HW4 discharged the largest emission flux reaching 29.3 mg•m −2 •h −1 , but the CH4 emission flux of HW2 discharged the largest emission flux reaching 0.15 mg•m −2 •h −1 . From the estuary to the inland, the emission flux of CO2 was decreased at first and then appeared increasing trend, but the emission flux of CH4 was contrary to CO2.

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Characteristics of greenhouse gas emission in the Yellow River Delta wetland

Cited by 24 publications

References 18 publications

Thinning Intensity Affects Soil-Atmosphere Fluxes of Greenhouse Gases and Soil Nitrogen Mineralization in a Lowland Poplar Plantation

Thinning Intensity Affects Soil-Atmosphere Fluxes of Greenhouse Gases and Soil Nitrogen Mineralization in a Lowland Poplar Plantation

New provincial CO2 emission inventories in China based on apparent energy consumption data and updated emission factors

The Spatial and Temporal Variation Characteristics of CH<sub>4</sub> and CO<sub>2</sub> Emission Flux under Different Land Use Types in the Yellow River Delta Wetland

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Characteristics of greenhouse gas emission in the Yellow River Delta wetland

Cited by 24 publications

References 18 publications

Thinning Intensity Affects Soil-Atmosphere Fluxes of Greenhouse Gases and Soil Nitrogen Mineralization in a Lowland Poplar Plantation

Thinning Intensity Affects Soil-Atmosphere Fluxes of Greenhouse Gases and Soil Nitrogen Mineralization in a Lowland Poplar Plantation

New provincial CO2 emission inventories in China based on apparent energy consumption data and updated emission factors

The Spatial and Temporal Variation Characteristics of CH&lt;sub&gt;4&lt;/sub&gt; and CO&lt;sub&gt;2&lt;/sub&gt; Emission Flux under Different Land Use Types in the Yellow River Delta Wetland

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The Spatial and Temporal Variation Characteristics of CH<sub>4</sub> and CO<sub>2</sub> Emission Flux under Different Land Use Types in the Yellow River Delta Wetland