|
E. Linacre |
11/'97 |
Values given by Barry & Chorley (1) are in rough agreement with those in our Table 1.1, and supplement them, as shown below.
Table 1. Comparison of values on pages 168 & 277 of Barry & Chorley (1992) with those in our Table 1.1.
|
typical dimension |
scale* |
typical duration** |
||
|
feature \ book |
(B & C) |
(L & G) |
(B & C) |
(L & G) |
|
turbulence |
0.3 m |
micro |
3 seconds |
1 minute |
|
wind gust |
- |
micro |
10 seconds |
1 minute |
|
dust devil |
30 m |
micro |
1 minute |
1 minute |
|
cumulus cell |
300 m |
topo |
2 minute |
1 hour |
|
tornado |
3 km |
topo |
5 minute |
1 hour |
|
thunderstorm |
300 km |
meso |
1 hour |
4 hours |
|
cold front |
- |
synoptic |
1 day |
4 days |
|
tropical cyclone |
600 km |
synoptic |
2 days |
4 days |
|
jet stream |
2,000 km |
synoptic/ global |
1 month |
4 days/ 1 year |
|
general circulation |
- |
global |
4 months |
1 year |
* the scale is determined by the typical dimension given in the previous column.
** the typical duration of features on the scale shown in the third column.
(1) Barry, R.G. & R.J. Chorley 1992. Atmosphere, Weather & Climate (6th edn) (Routledge) 392 pp.