Continuous observing system of dissolving nitrous oxide in water body in surface layer

Abstract

The invention discloses a continuous observing system of dissolving nitrous oxide in a water body in a surface layer, and relates to monitoring equipment of greenhouse gases. The system is provided with a surface-layer water pump, filter equipment, temperature and salinity measurement equipment, a flow controller, a water vapor balancer, a temperature probe, a cold well, a gas pump, a waterproof electrode, an output spectrum detector of an off-axis integral chamber and a standard gas cylinder, wherein a water inlet of the surface-layer water pump is installed in water, a water outlet of the surface-layer water pump is connected with an inlet of the filter equipment, the outlet of the filter equipment is connected with the temperature and salinity measurement equipment, the outlet of the temperature and salinity measurement equipment is connected with the inlet of the flow controller, the outlet of the flow controller is connected with the water vapor balancer, an air outlet arranged at the upper part of the water vapor balancer is connected with the inlet of the cold well, the temperature probe is arranged in the water vapor balancer, the outlet of the cold well is connected with the inlet of the gas pump, the outlet of the gas pump is connected with the waterproof electrode, the outlet of the waterproof electrode is connected with the inlet of the detector and the outlet of the standard gas cylinder, the output end of the detector is connected with an auxiliary balancer which is arranged at the bottom in the water vapor balancer, and a wastewater outlet is formed at the bottom of the water vapor balancer.

Description

technical field [0001] The invention relates to a greenhouse gas monitoring device, in particular to a continuous observation system for dissolved nitrous oxide in surface water. Background technique [0002] Nitrous oxide gas has important effects on global climate and atmospheric chemical processes. The greenhouse effect of the equivalent amount of nitrous oxide is 200-300 times that of carbon dioxide. At the same time, its photochemical product NO can be combined with O in the stratosphere 3 reaction, destroying the atmospheric ozone layer (Crutzen, 1970). IPCC report AR4 (2007) pointed out that the concentration of nitrous oxide in the atmosphere rose from 270±1ppb before the industrial revolution to about 319ppb in 2006, and it is still growing at a rate of about 0.25% per year. Only in the 6 years between the third report (2001) and the fourth report (2007) of the IPCC, the partial pressure of nitrous oxide in the atmosphere increased by about 5ppb, and the correspo...

AI Technical Summary

Problems solved by technology

However, gas chromatography needs to consume part of the headspace in the balance system, which leads to the interruption of the water-gas balance in the balance system, and cannot achieve continuous measurement in the true sense.

Images