Sentences with phrase «between ozone concentrations»
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.
http://www.nber.org/ Not exact matches
The region between 45 degrees N and 65 degrees N saw the lowest ever concentrations of total atmospheric ozone over the three continental regions of North America, Europe and Siberia in the winter - spring months of 1992 and 1993.
These show that just such a long - term decrease is taking place, and that there were unusually low values of ozone concentration in 1992 between latitudes 50 degrees North and 60 degrees North, covering Northern Europe, Russia and Canada.
The ozone concentration reaches a maximum between about 20 and 25 kilometers (~ 12.4 to 15.5 miles).
To test this theory, we decided to see if there was any relationship between the concentration of ozone in the ozone layer, and the phase change conditions.
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.