title: Influences of wind speed and direction on atmospheric particle concentrations and industrially induced noise.
abstract: OBJECTIVE
  In this study, the spatial and temporal relationship of wind speed, atmospheric particles concentration, and the industrial-induced noise levels during different times of the day were examined, using sawmill industrial location around Ile-Ife in Osun of Nigeria as a case study.
  
  
  METHODS
  Mobile devices were used to measure noise level and basic meteorological parameters were examined and their influences on the noise levels distribution were assessed. The maximum and minimum sound levels; Lmaxand Lmin, the PM10and PM1particle concentrations, wind speeds and directions were measured in the morning (7-9 a.m.), afternoon (12-2) and evening (4-6 p.m.) over 14 consecutive days.
  
  
  RESULTS
  The results revealed that the noise level varies spatiotemporally, much more consistent spatial distribution along the vicinity of sawmill industries. A higher level of noise occurred during the weekday (WD), Leq> 70 dB(A), compared to weekends (WE). Extreme average noise levels are associated with the immediate neighbourhood of sawmill industrial areas during WD compared to streets and road annexes of the study area. The results also show a very weak relationship between noise and PM10and PMcoarsefor both WD and WE with r < 0.35 for PM1and r < 0.20 for PMcoarse.There appears to be a moderate significant correlation between noise level and PM1during some meteorological conditions with r > 0.51.
  
  
  CONCLUSIONS
  The slight relationship between noise and PM1is perhaps a result of wind movement that carries particles from the source region since booth noise and particles mostly originate from the sawmill. The study concludes that wind speeds and directions have a significant influence on both noise level and particle concentration within the study sites.
authors.affiliation: Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria.
authors.forename: Ayansina
authors.initials: A
authors.lastname: Ayanlade
authors.affiliation: Department of Geography, Obafemi Awolowo University, Ile-Ife, Nigeria.
authors.forename: Ebunoluwa Folasade
authors.initials: EF
authors.lastname: Oyegbade
keywords: Atmospheric particles; Noise levels; Turbulent; Wind speed/direction