| Main Title |
Spatial Variation of the Evolution and Structure of the Urban Boundary Layer. |
| Author |
Godowitch, J. M. ;
Ching, J. K. S. ;
Clarke, J. F. ;
|
| CORP Author |
Environmental Protection Agency, Research Triangle Park, NC. Atmospheric Sciences Research Lab. |
| Year Published |
1987 |
| Report Number |
EPA/600/J-87/106; |
| Stock Number |
PB88-139670 |
| Additional Subjects |
Boundary layer ;
Temperature inversion ;
Urban areas ;
Mixing ;
Heating ;
Sites ;
Temperature gradients ;
Advection ;
Cooling ;
Atmospheric sounding ;
Helicopters ;
Missouri ;
Reprints ;
Saint Louis(Missouri) ;
Atmospheric boundary layer ;
Sunrise
|
| Holdings |
| Library |
Call Number |
Additional Info |
Location |
Last
Modified |
Checkout
Status |
| NTIS |
PB88-139670 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
| Collation |
26p |
| Abstract |
The spatial variation of the nocturnal urban boundary layer structure and the time variation of the mixing height, the nocturnal inversion top and strength after sunrise are presented for urban sites located upwind, downwind, and near the center of the heat island and for upwind nonurban sites. Observations were obtained from high resolution temperature soundings made by helicopter spirals during 35 morning experiments in St. Louis, Missouri. The mixing height (base of the nocturnal inversion) evolved in a parabolic manner after sunrise at the urban locations. A rise in the inversion top after sunrise at urban sites is believed to be due to low level convergence which caused the entire inversion layer to be lifted. Large horizontal temperature gradients are associated with the heat island effect at the surface. |
| Supplementary Notes |
Pub. in Boundary-Layer Meteorology, v38 p249-272 Mar 87. |
| NTIS Title Notes |
Journal article. |
| Title Annotations |
Reprint: Spatial Variation of the Evolution and Structure of the Urban Boundary Layer. |
| PUB Date Free Form |
1987 |
| Category Codes |
55C; 55B; 91A |
| NTIS Prices |
PC A03/MF A01 |
| Primary Description |
600/09 |
| Document Type |
NT |
| Cataloging Source |
NTIS/MT |
| Control Number |
805623759 |
| Origin |
NTIS |
| Type |
CAT |
