Because the CO2 concentration in the atmosphere is positively correlated with the air temperature, while the net primary production is positively correlated with the CO2 concentration, and the net primary production is positively correlated with the niche quantity. Therefore, during the " Cold period"...
A new technique for measuring CO 2 concentration in air samples, based on mass spectrometry, is described as an alternative to the common gas chromatographic method. Using a dual inlet isotope ratio mass spectrometer (IRMS), the ratio of the abundances of the m/z peaks 44 and 28 is ...
If you are aware that exhaled air has a CO2 concentration of up to 30.000 ppm, you can easily imagine that the indoor air quality can deteriorate rapidly. This is true especially in cases of small rooms with large numbers of people and high activity levels. If the CO2 levels are monitored...
CO2 concentration should be within +/-20% about some nominal concentration. S-2Coxygen sensor C6689-S2C Trace oxygen cell for use in TurbO2 analyzer. Provides rapid recovery from air calibration (approximately 20 minutes). Low range limit is 0-100 ppm. Has three pin contact system. Z-2C...
At present (AD 2000) the CO2 concentration is about 370 ?mole/mole (in short: ppm) (CDIAC). This level is considerably elevated compared to natural conditions, due to the massive anthropogenic CO2 production caused by fossil fuel combustion. CO2 mixing ratio measurements in air bubbles trapped...
You might think it's your colleagues or the pressures of work that's getting you down at the office, but new research suggests it could well be the air you're breathing instead. Scientists in the US have found that the concentration of carbon dioxide inside the confined spaces we use ever...
The teams simulated high CO2 levels in open-air fields using a system called Free Air Concentration Enrichment (FACE), which pumps out, monitors and adjusts ground-level atmospheric CO2 to simulate future conditions. In this study, all other growing conditions (sunlight, soil, water, temperature...
Global atmospheric carbon dioxide concentration 1959-2024 Published by Ian Tiseo, Jan 15, 2025 Average annual atmospheric levels of carbon dioxide (CO₂) reached a record high of 424.61 parts per million (ppm) in 2024. Monthly atmospheric CO₂ concentrations peaked that year in June, at ...
The Airovita S1 is an all in one indoor air quality monitor for CO2 en O2 monitoring The CO2 Oxygen sensor allows continuous monitoring of indoor air quality in spaces where healthy CO2 oxygen values can be problematic Off balance oxygen and carbon dio
Youmightthinkit'syourcolleaguesorthepressuresofworkthat'sgettingyoudown attheoffice,butnewresearchsuggestsitcouldwellbetheairyou'rebreathing instead.ScientistsintheUShavefoundthattheconcentrationofcarbondioxide insidetheconfinedspacesweuseeverydaycouldbehighenoughtodamageour health. 你也许会认为是你的同事或者是...