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Device for determining evapotranspired hydrogen and oxygen isotope flux of ecological system

An ecosystem and isotope technology, applied in the fields of hydrology and ecological research machinery and atmosphere, can solve the problem of no measurement, and achieve the effect of rapid and accurate measurement

Inactive Publication Date: 2012-07-18
INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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  • Description
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Problems solved by technology

Although the principles and methods of measuring the evapotranspiration hydrogen and oxygen isotope fluxes in the ecosystem have been reported, there is no systematic device to complete the related measurements.

Method used

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  • Device for determining evapotranspired hydrogen and oxygen isotope flux of ecological system
  • Device for determining evapotranspired hydrogen and oxygen isotope flux of ecological system
  • Device for determining evapotranspired hydrogen and oxygen isotope flux of ecological system

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Embodiment Construction

[0024] The technical solution of the present invention will be described in detail below in conjunction with the drawings:

[0025] The present invention provides a device for measuring the flux of hydrogen and oxygen isotope in the ecosystem, such as figure 1 with figure 2 Shown. The device is composed of a gas collection system, a gas distribution system, a concentration measurement system, a condensation-melting system, and an isotope analysis system. The gas collection system includes a support 1, a gas extraction port 2, a filter 3, and a gas guide tube 41. The gas distribution system includes a multi-channel solenoid valve 14 and an electromagnetic relay 7, and the concentration measurement system includes an infrared gas analyzer 5 and a data collector 6, condensation- The melting system includes a sampling bottle 15, a cold trap 10 and a constant temperature water bath 11, and the isotope analysis system includes a sampling needle 12 and a mass spectrometer 13. The sa...

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Abstract

The invention relates to the field of machinery for researches on aerology, hydrology and ecology, and provides a device for determining the evapotranspired hydrogen and oxygen isotope flux of an ecological system and the use of the device. The device consists of a gas acquisition system, a gas diversion system, a concentration determination system, a condensation-unfreezing system and an isotopeanalysis system. Atmospheric water samples of different levels are acquired, hydrogen and oxygen isotope radios Sigmav of the water samples are analyzed, determination of vapor concentration w and the acquisition of the atmospheric water samples are realized at the same time, and the evapotranspired hydrogen and oxygen isotope flux of the ecological system is calculated according to the hydrogen and oxygen isotope ratios of the water samples of the different levels and the vapor concentration.

Description

Technical field [0001] The invention relates to the field of atmospheric science, hydrology and ecology research machinery, and specifically is a device for measuring the flux of hydrogen and oxygen isotopes of evapotranspiration in an ecosystem. Background technique [0002] In the earth’s water cycle, about 0.2% of the oxygen is 18 O, 0.015% of hydrogen is 2H or D. The ecology and hydrology circles have conducted extensive research on these stable isotopes of water. Trace isotopes of water in the natural environment (H 2 18 O or HD 16 O) It is usually used relative to the main isotope H 2 16 Measured by the molar ratio of O, expressed by the δ symbol: [0003] δ=(R / R S -1)×1000 [0004] In the formula, R is the measured substance 18 O / 16 O or D / H molar ratio, Rs is the standard 18 O / 16 The molar ratio of O or D / H, the Vienna Standard Mean Ocean Water (VSMOW) is used internationally as the standard for stable isotopes of oxygen and hydrogen. 18 O / 16 O is equal to 0.0020052, and...

Claims

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Application Information

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IPC IPC(8): G01N35/00
Inventor 温学发王建林李庆康张心昱王晶苑孙晓敏于贵瑞
Owner INST OF GEOGRAPHICAL SCI & NATURAL RESOURCE RES CAS
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