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Greenhouse gas emission flux observation sampling device for thicket sedge marsh

A greenhouse gas and emission flux technology, applied in the direction of sampling devices, etc., can solve problems such as data deviation

Inactive Publication Date: 2019-05-21
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of serious data deviation caused by traditional gas sampling devices, and to provide a greenhouse gas emission flux observation sampling device and corresponding calculation method suitable for dense sedge swamps and in-situ observation

Method used

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  • Greenhouse gas emission flux observation sampling device for thicket sedge marsh
  • Greenhouse gas emission flux observation sampling device for thicket sedge marsh
  • Greenhouse gas emission flux observation sampling device for thicket sedge marsh

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 A greenhouse gas emission flux observation and sampling device

[0026] A greenhouse gas emission flux observation sampling device, such as figure 1 , it includes a top box 1, a base 2 and a gas sampling collection device, the top box 1 is provided with an exhaust nozzle 3, an air inlet nozzle 4, a fan 5, a digital display thermometer 6, a handle 7, and a hose 8; The gas sampling and collecting device includes a syringe 9 and a gas sample bag 10; the exhaust nozzle 3 and the gas inlet nozzle 4 are symmetrically distributed on the top cover of the top box 1, and the flexible pipe 8 is connected to the exhaust nozzle 3; One end hangs down into the inner cavity of the box body 1, and holes are evenly punched on the hose in the box; the syringe 9 is connected with the exhaust nozzle 3 and the gas sample bag 10 through a three-way valve;

[0027] The top box 1 is a cylindrical box with a top and no bottom made of plexiglass (transparent plexiglass is used when th...

Embodiment 2

[0032] Example 2 Calculation method of greenhouse gas emission flux in dense sex marsh

[0033] (1) Set up a 10m×10m quadrat in the dense sedge swamp to be monitored. Investigate the number of grass hills in the quadrat, measure the base diameter of all grass hills in the quadrat, and calculate the coverage of the grass hills in the quadrat. Calculated as follows:

[0034]

[0035] In the above formula C is the grass cover, r i is the base diameter of the i-th grass hill (m), A is the sample square area (m 2 );

[0036] (2) After the gas collection is completed in the grass hill and between the hills, the gas is brought back to the laboratory for concentration analysis and measurement; the emission flux of each greenhouse gas in the grass hill and between the hills is calculated by the formula, and the calculation formula of the flux is for

[0037]

[0038] In the formula: F is the gas emission flux (mg m –2 h –1 ); M is the molar mass of the measured gas, ...

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Abstract

The invention discloses a greenhouse gas emission flux observation sampling device, which comprises a top box, a base and a gas sampling collecting device. An exhaust nozzle, an air inlet nozzle, a fan, a digital display thermometer, a handle, and a hose are arranged on the top box. The gas sampling and collecting device includes an injection device and a gas sample bag; the exhaust nozzle and theair inlet nozzle are symmetrically distributed on the top cover of the top box; the host is connected with the exhaust nozzle and the other end is suspended into the inner cavity of the box; and holes are formed in the host in the box uniformly. The injection device, the exhaust nozzle and the gas sample bag are connected by a three-way valve. A calculation method for the greenhouse gas dischargeflux of the thicket sedge marsh is provided. The device has the advantages: firstly, calculation of greenhouse gas emission flux becomes accurate by the cylindrical box; secondly, the exhaust nozzleand the air inlet nozzle employ the silicone nut, so that the sealing performance of the box is ensured; repeated use is realized; and material consumption is reduced; and thirdly, with the calculation method, the calculation accuracy of greenhouse gas flux is improved.

Description

technical field [0001] The invention belongs to the technical field of soil ecology, and in particular relates to a greenhouse gas emission flux observation and sampling device suitable for dense sedge swamps and a corresponding calculation method. Background technique [0002] Marsh wetland is an important source or sink of various greenhouse gases, which can absorb CO through photosynthesis of plants. 2 , can also release CO during the carbon-nitrogen cycle 2 、CH 4 and N 2 O. In maintaining carbon balance and regulating atmospheric greenhouse gases (CO 2 、CH 4 and N 2 O) content has an irreplaceable role. However, it is necessary to disentangle the relationship between the increase in the concentration of greenhouse gases in the atmosphere and the wetland CO 2 、CH 4 and N 2 The relationship between O fluxes is essential to understand the marsh CO 2 、CH 4 and N 2 Therefore, it is particularly important to accurately monitor the greenhouse gas flux in wetlands. ...

Claims

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Application Information

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IPC IPC(8): G01N1/24
Inventor 王铭韩园园吴计生李兴丽王国栋
Owner NORTHEAST NORMAL UNIVERSITY
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