Sentences with phrase «ozone concentrations»

That increase will have a disproportionately large impact on vegetation because ozone concentrations in many locations will rise above the critical level where adverse effects are observed in plants and ecosystems.

High ozone concentrations typically occur outside of the cities and represent a risk factor for the health of rural population as well as for agricultural production.

Note that increased methane also leads to increased ozone concentrations, for added radiative forcing bang for your methane buck.

The progress we've made is undeniable - national average peak ozone concentrations have dropped by 17 percent since 2000.

These maps show the state of the ozone hole each year on the day of maximum depth — the day the lowest ozone concentrations were measured.

When we compared the seasonal variations in ozone concentrations for each band to the seasonal variations in the phase change conditions, we found they were both highly correlated!

They find that variation in ozone concentrations at levels well below federal air quality standards have a significant impact on productivity.

Normally ozone concentrations in this part of the atmosphere are three to ten times higher.

For instance, Figure 20 compares the average monthly pressure of the phase change to the average monthly ozone concentrations for the 45 - 60 ° N band.

However, the crop losses associated with high ozone concentrations will be significant.

Among these are N cycling on the land (which could enhance or suppress CO2 uptake by plants) and the impacts of increasing ozone concentrations on plants (which could suppress CO2 uptake).

The researchers calculated that adopting GHG mitigation technologies would reduce particulate matter and ambient ozone concentrations by about 10 percent.

For O3, the design value represents the three - year average of the fourth highest daily 8 - hour maximum ozone concentration.

Also, the CRS reports, ozone concentrations as high as those in Los Angeles, the nation's smoggiest city, have been found near oil and gas fields — during winter — in rural areas of Wyoming, Utah and Colorado.

This false - color image shows ozone concentrations above Antarctica on Oct. 2, 2015.

Radiosondes measuring ozone concentration are known as ozonesondes.

«Wave patterns in the images, revealed by UV absorption from ozone concentrations, are critical to understanding the wind patterns, giving scientists an additional means to study the chemistry and global circulation of the atmosphere,» writes NASA.

Figure 3: Percentage difference in monthly mean surface ozone concentrations in March, between the run in which spring and summer sea ice is removed («extreme scenario») and the run in which no perturbations were applied.

Trends and scenarios of ground - level ozone concentrations in Finland.

The windswept plumes caused ozone concentrations over these cities to rise.

«Above about 50 km in altitude, the ozone heating effect diminishes in importance because of falling ozone concentrations, and radiative cooling becomes relatively more important.

There is evidence that the 11 year solar cycle, during which the Sun's energy output varies by roughly 0.1 %, can influence ozone concentrations, temperatures, and winds in the stratosphere (the layer in the atmosphere above the troposphere, typically from 12 to 50 km, depending on latitude and season).

Debates over the optimal level of ozone have been ongoing for many years, and current efforts to strengthen environmental regulations affecting ozone concentrations remain contentious.

«Even assuming that best - practice technology for controlling ozone is adopted worldwide, we see rapidly rising ozone concentrations in the coming decades,» said John M. Reilly, associate director of the MIT Joint Program on the Science and Policy of Global Change.

6 Ice age — time in the past when continental glaciers covered large parts of Earth's surface Global warming — a gradual increase in the temperature of Earth's atmosphere Greenhouse gas — Gases in the atmosphere, such as carbon dioxide, that trap solar energy Ozone hole — a large area of reduced ozone concentration in the stratosphere, found over Antarctica Chlorofluorocarbon — chlorine compounds that are the main cause of ozone depletion KEY TERMS

Observations of Near - Zero Ozone Concentrations Over the Convective Pacific: Effects on Air Chemistry

I'm impatiently waiting for lower wind speeds in order to get a vertical profile of the present ozone concentration in the atmosphere.»

When air with high ozone concentrations touches down in North America, it can pose the classic dangers of urban smog: heart disease, lung disease, and death.

They also found that changes in ozone concentration matched fluctuating cosmic ray intensity between 1979 to 1992.

They are also able to control the amount of ozone in the chamber — an aspect of indoor environments that can vary with outdoor ozone concentrations and the opening of windows and doors or the use of a few certain household appliances.

Ammonia is an abundant constituent in motor vehicle emissions, and its conversion to nitrogen oxides could result in increases in harmful ozone concentrations.

Scientists use the word hole as a metaphor for the area in which ozone concentrations drop below the historical threshold of 220 Dobson Units.

Ozone level is lowest during the Southern Hemisphere winter, at which time ozone concentration is approximately 1/3 of the global average.

Using data on the productivity of agricultural workers, along with information about environmental conditions that come from the California air monitoring network, they analyze the relationship between ozone concentrations during the typical workday and farm worker productivity.

Klingberg said: «The results show that the risk of ozone damage to plants is greatest in central Europe where ozone concentrations are high and climatic conditions promote uptake of ozone through the stomata.

Air quality, through changes in the tropospheric ozone concentration, reactive chemistry, and the amount of the atmospheric cleanser, hydroxide radical, OH, may effect the strength and sign of climate forcing.

The year 2000 ozone concentration still produces a 39 % higher iRF when imposed in the 1850 climate state than in the climate state produced by the Historical, all - forcings simulation (and 77 % higher than when constant present day conditions are imposed).

Comparison between the monthly averaged pressure of the phase change and the corresponding concentration of ozone in the ozone layer, for 45 - 60 ° N. Ozone concentrations (in Dobson Units) were calculated from NASA's Total Ozone Mapping Spectrometer (TOMS) satellite measurements.

«The direct health effects caused by higher ozone concentration include irritation of mucous membranes, respiratory reactions such as reduced lung functions, cardiovascular diseases, as well as an impaired physical performance,» according to Umweltbundesamt.

Could a flow of atmospheric mass between poles cause creation of different ozone concentrations, hence cloud cover, in different hemispheres?

Giovanis, Eleftherios (2014): Evaluation of Ozone Smog Alerts on Actual Ozone Concentrations: A Case study in North Carolina.

As NOAA's Ozone Depleting Gas Index demonstrates, the Montreal Protocol has succeeded in gradually restoring ozone concentrations in the stratosphere.

Abstract — We investigated the effects of elevated ozone concentration (E-O3) on CH4 and N2O emission from paddies with two rice cultivars: an inbred Indica cultivar Yangdao 6 (YD6) and a...

Notice the «croissant» of high ozone concentrations formed when the Antarctic vortex blocks the southerly migration of ozone formed in the tropics... Why are we seeing the worst - ever ozone hole when 13 years of regulation are finally bringing CFC levels under control?