Given the lack of data for the spatial distribution of hazard intensity in relation to exposure, the median wind speed of all grids within each of the districts of Shenzhen was taken as the final input representing hazard intensity.
This appears to be counterintuitive because the opening and shutting of windows is likely temperature dependent and not dependent on soil moisture, PM10, and median wind speed.
Overall, wind speeds were generally higher during winter sampling sessions (winter mean = 3.20 m/sec, vs. summer mean = 1.79 m/sec), and sessions with lower average wind speeds (stratified at median) had higher concentrations of summer NO2 and winter BC (p < 0.05).
Further analyses of meteorological factors examined associations between temporally adjusted pollutant concentrations and within-session average wind speed (continuous and binary (median-stratified) measures), and dominant wind direction (e.g., West, Northwest).
Gust, in meteorology, a sudden increase in wind speed above the average wind speed.
We then determined dominant wind direction and average wind speed (from any direction) for each sampling session.
Average wind speed at hub height depends on height (h), swept area A, and wind shear n.
Average wind speed changed from 2 m s−1 to 7.5 m s−1 and the wind direction from southeast to northwest.
We calculated the median of the wind speeds for all 19 study days.
During the non-breeding season, however, short-tailed albatrosses ventured into regions with low wind speeds (median = 6.26±0.54 m s−1) and wave heights (mean = 2.17±0.12 m) near continental margins, apparently seeking their preferred foraging areas, despite windier regions offshore.
