ST = [(TM + Tm)/2]--Tb, where: ST = Thermal sum ([degrees] C); TM = daily mean
maximum temperature ([degrees] C); Tm = daily mean
minimum temperature ([degrees] C); Tb = minimum basal temperature for the plant ([degrees] C).
The World Health Organization recommends a daily mean
air quality guideline below 25.
The researchers then used data from the Swedish Meteorological and Hydrological Institute to match medical data for 274,029 patients with information on daily mean
, minimum, and maximum air temperature; wind velocity; sunshine duration; atmospheric air pressure; air humidity; snow and rain precipitation; and change in air temperature.
However, LST cannot serve as a proper proxy for the daily mean
temperature because only two images are generally available within a day, and cloud-contaminated values often lead to incomplete data (Wan 2008).
Centrally located and experiencing all four seasons, Little Rock has a daily mean
temperature of 62.6 degrees and an annual precipitation of 49.6 inches.
As for the water temperature, NOAA - The Great Lakes Environmental Research Laboratory reported a daily mean
surface temperature of 36.7 degrees.
Knock Airport had just 18.2 hours sunshine or a daily mean
.2 an of 0.6 hours, making it the dullest January recorded in the station's 22-year history.
The days of the week, holidays, number of days elapsed since the beginning of the period, daily mean
temperature, daily mean
relative air humidity, and forest fires, which may interfere directly or indirectly with respiratory diseases, were introduced as control variables in the models.
Also, the daily mean
temperature in Doha in February is 18.6C.
World Health Organization (WHO) guidelines advise levels should not exceed a daily mean
Using average air temperature rather than daily mean
temperature may create more accurate comparative numbers, assuming that the methodology is consistent across the areas being assessed.