00:10
00:09
00:08
00:07
00:06
00:05
00:04
00:03
00:02
00:01
| air pollution containing ozone and reactive chemical compounds formed by sunlight on nitrogen oxides and hydrocarbons, often from auto exhaust |
| precipitation consisting of numerous, minute droplets of water |
| katabatic (ˌkætəˈbætɪk) | |
| —adj | |
| Compare anabatic (of winds) blowing downhill through having become denser with cooling, esp at night when heat is lost from the earth's surface | |
| katabatic (kāt'ə-bāt'ĭk) Pronunciation Key
Relating to wind currents that blow down a gradient, especially down the slopes of a mountain or glacier. When air comes in contact with the cool surface of a glacier or the upper regions of a mountain or slope, the air cools, becomes dense, and blows downward. Katabatic winds are usually cool and are especially common at night in polar regions. Compare anabatic. |