Gases at sea level are also compressed by the weight of the atmosphere above them. The force of the air weighing down over a unit of area is known as itsatmospheric pressure. The reason why we are not crushed by this weight is because the molecules inside our bodies are pushing outward t...
Precision engineered to provide fast and reproducible data, Cirrus 3 can accurately detect and quantify gases and gas mixtures, from one or more sampling locations with a single instrument. Gas composition can be monitored over a wide dynamic range, from percentage levels down to the sub ppm rang...
In addition, air samples have been collected daily/weekly at seven stations and analyzed by GC/MS system since 2010. The two methods show comparable precisions at around 1% and all the measurements were calibrated by standards linked to the Advanced Global Atmospheric Gases Experiment (AGAGE) ...
13.Morning temperature is expected to be around 20 degrees by Thursday.预料星期四早上气温大概二十度。 14.It's about degrees Celsius this afternoon.今天下午的气温大约是摄氏二十七度。 15.The abiotic factors of the environment include light, temperature, and atmospheric gases.环境的非生物因素包括光、...
Calibration of the DOAS system was performed individually by inserting a cell with quartz glass windows into the optical path between the light source and the receiver assuming constant value of the product of concentration and distance. Besides, standard gases with different concentration were filled ...
Practically all of the energy that reaches the earth comes from the sun. Intercepted first by the atmosphere, a small part is directly absorbed, particularly by certain gases such as ozone and water vapor. Some energy is also reflected back to space by clouds and the earth's surface. ...
Isoprene is a key trace component of the atmosphere emitted by vegetation and other organisms. It is highly reactive and can impact atmospheric composition and climate by affecting the greenhouse gases ozone and methane and secondary organic aerosol formation. Marine fluxes are poorly constrained due ...
On average, ozone values increased about 5percent every 10 years.To explore what was causing the changes, the scientists examined levels of nitrogen oxides, a mixture of gases made up of nitrogen and oxygen. Nitrogen oxides are 8. A to be atmospheric pollutants often resulting from human ...
is of great importance.3Scattering of light by tropospheric sulfate particles exerts a cooling effect compared with warming due to greenhouse gases.1Particles generated by combustion of fossil fuel contain both black carbon and organic carbon. Black carbon heats the atmosphere by absorption of solar ...
The infrared absorption by the atmosphere is due primarily to water vapor and CO2, with a smaller contribution from gases such as O3, N2O, and CH4. The atmospheric absorption is very wavelength-selective. Below about 0.2 μm, absorption by O2 and O3 is so great that there is essentially ...