This study provides a metlod for an objective, probabilistic forecast offoehn based on the operational global model of the European Centre for Medium-Range Weather Forecast (ECMWF). Foehn strongly depends on topographical features, which are not yet resolved in operational global models. Therefore the proxi-parameters vertical of potential temperature 10, cross-barrier pressure dffirence lp, an...

Foehn-like extreme hot and dry wind conditions (34°C, >2.5 kPa vapor pressure deficit, and 7 m s(-1)) strongly affect grain quality in rice (Oryza sativa L.). This is a current concern because of the increasing frequency and intensity of combined heat and water-deficit stress under climate change. Foehn-induced dry wind conditions during the grain-filling stage increase ring-shaped chalkiness a...

In southeastern Australia the synoptic archetypical severe fire weather day is that of the dry “cool change”, or coastally modified cold front. Less well known, however, are synoptic cases that occur in connection with the topography of the eastern Australian mainland and Tasmania, which can also lead to abrupt spatiotemporal changes in fire weather variables that ultimately result in locally e...

Wind power resources in mountainous regions are conditioned on a vast variety of factors influencing air flow. Complex topography causes various phenomena such as localised thermal winds, acceleration due to tunneling and Foehn winds interfering at a range of spatial scales and varying in time due to weather seasonality. It increases the dimensionality of parameter space and adds additional com...

zaki’s reef is located in the gulf of suez, a narrow portion of the red sea, with exceptionally dry and hot climate and lacks almost all scientific data. this research intends to describe the area’s unique climatology, which may reveal correlations between the reef’s existence at high latitude and extreme climate conditions. air temperature at zaki’s reef fluctuated between 0.3 and 58.6oc with ...

Twelve years of upper air data and surface observations across Iceland are used to investigate the connection between the difference of surface air temperature upstream and downstream of the Icelandic highlands and several parameters of the airflow, such as precipitation, static stability and wind speed. The data does not support the well-known concept of the heat of the foehn being a result of...

Abstract The present study gives evidence of the occurrence foehn-like wind on eastern slopes mountains at Southeastern Brazil. A particular case was detected based observational 4 July 2015 near city Cruzeiro, state Sao Paulo, Serra da Mantiqueira mountains. Results obtained from numerical simulations are consistent with foehn deducted analysis regional patterns and time series selected meteor...

Two different South Foehn types have been described in the literature: the Swiss Foehn is characterized by significant ascent on the southern side of the Alps, hence fulfilling a requirement of the thermodynamic Foehn theory associated with latent heating. On contrast, the Austrian Foehn is characterized by near-horizontal flow to the south of the Alps, followed by dry-adiabatic descent into th...

Observations are given for the foehn event which occurred in the Abashiri-Ohmu area (N44.3, E143.5), Hokkaido, northern Japan, on 12 May 1975. A numerical investigation is made of the foehn, using a 2-dimensional nonhydrostatic model. The foehn is well simulated, even without any diabatic heating in the presence of an inversion layer below 900hPa. This foehn is confirmed to be dynamically induc...

After an outline of the scientific questions within FORM (Foehn study in the Rhine valley during MAP) some results are being discussed, which allow a deeper insight into the unstationary behavior of foehn in a complex Alpine valley. Due to an extremely dense and sophisticated instrumentation of in situ and remote sensing platforms the themodynamic and dynamic structure could be nicely investiga...