12. Sea/Land Breeze and Circulation
What is the wind
direction at night?
During the day?
Will sea breeze
continue inland for a
long distance?
و شود می گرم آب از تر سریع زمین
دست از را خود گرمای نیز تر سریع
دهد می.روزها سواحل در این بنابر
ها شب و خشکی به دریا سمت از باد
باشد می برعکس.
17. On a clear, relatively calm night, a weak country breeze carries pollutants from the outskirts into
the city, where they concentrate and rise due to the warmth of the city’s urban heat island. This
effect may produce a pollution (or dust) dome from the suburbs to the center of town.
حرارتی جزیره
18. Urban air circulation pattern associated with heat island
phenomenon.
• Similar to a sea breeze on an island
• Result in “dust dome”
حرارتی جزیره
22. Wind speed and direction are typically quite variable
164/720 = 23%
16/720 = 2.2%, 24/720 = 3.3%, 70/720 = 9.7%
باد گل
23. Monthly Wind Rose of Gainesville
What is the major wind direction in Gainesville?
What is the impact on local air quality if the wind is
variable? What if it’s persistent?