Open AccessEin diagnostisches Modell zur Berechnung von Trajektorien über dem Schweizer Mittelland
Author(s) -
Urs Neu
Publication year - 1991
Publication title -
geographica helvetica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 20
eISSN - 2194-8798
pISSN - 0016-7312
DOI - 10.5194/gh-46-42-1991
Subject(s) - terrain , divergence (linguistics) , sequence (biology) , mathematics , geodesy , algorithm , meteorology , computer science , geography , cartography , philosophy , linguistics , biology , genetics
The aim of the presented model (called WITRA) is to use thedata of the automatic wind stations on the Swiss Plateau as abasis for calculating back-trajectories over a complex terrain.WITRA interpolates a three-dimensional windfield out of themeasured data and the radio-sonde profile of Payerne. By amathematical method developed by SASAKI (1958) basedon the variational analysis and with regard to its application tothe investigated problem by SHERMAN (1978), the windfieldis slightly adjusted in a least-square sense in order to get itfree of divergence, i. e. mass-consistent. Within the same stepthe complex terrain and its effects on the wind are taken intoaccount. Trajectories can be calculated by a method mentionedby PETTERSSEN (1956) using a sequence of these windfields