denk dat je toch de richting moet meenemen, ik dacht dat het de bulk shear was en dan is dat zo. Ze geven ta zelf trouwens aan op die site bovenaan
http://www.theweatherprediction.com/habyhints/315/
Ja, nu zie ik het! Is niet helemaal consistent met wat meer naar beneden staat...
---------------------------------------------------
1. What is BRN?
BRN (Bulk Richardson Number) is an index that assesses the balance between instability (CAPE) and wind shear (
speed and directional shear with height) in a thunderstorm environment.
(...)
4. Pitfalls:
a. Do not use index when CAPE and SHEAR are both small. CAPE should be at least 500 J/kg and SHEAR should be at least 10 m/s.
b. Several combinations of CAPE and SHEAR can produce the same BRN. Always inspect the actual amount of instability and wind shear when assessing the relevance of the BRN value. The table in #3 is only a likeliness!- not a guarantee.
c.
Index gives no moisture, cap,
directional wind shear, jet stream wind or lift information. Assess these along with the BRN.
---------------------------------------------------
ik zal eens proberen op die manier..
Succes! Ben benieuwd of het dan wel klopt.
Quote selectie