Abstrac t . The Fosberg fire weather index is a simple tool for evaluating the potential influence of weather on a wildland fire based on temperature, relative humidity and wind speed. A modification to this index that includes the impact of precipitation is proposed. The Keetch-Byram drought index is used to formulate a ‘fuel availability’ factor that modifies the response of the fire weather ...

Efficiency of ground-applied naled (Dibrom 14), based on caged mosquito bioassays in a moderately vegetated coastal southeastern Florida citrus grove, proved to be significantly associated with downwind distance. However, association analysis between wind speed, temperature or relative humidity revealed no correlation between these meteorological factors and mosquito mortality. Tests conducted ...

heavy precipitation plays a significant role in arid and semi-arid regions of iran. in order to understand the effect of blocking high system on rainfalls in northwest iran during 25 - 28 october 2008, meteorological conditions including pressure, wind fields and temperature at multiple levels of the atmosphere were analyzed. sea level pressure, the 1000-500 hpa thickness, perceptible water, re...

This paper presents the development of a prototype weather station to measure the following weather data: air temperature, relative humidity, dew point, wind speed, and rainfall. The weather station, which has been designed for remote operation, performs automatic or unmanned measurements of weather data and transmits it wirelessly to a PC for logging and display by means of a graphical user in...

During the week of 7-14 March 2006, observations of winds and relative humidity were taken at various points along the mountain at Storm Peaks Laboratory in Steamboat Springs, CO. These observations were used to determine the relationship between slope flow and relative humidity. Slope flow is defined as the dot product of the wind vector and the gradient in elevation. The charts show details a...

the purpose of this study was to estimate relative potential hazards to birds and bats from wind developments in texas. we compiled lists of rare, threatened, or endangered species, along with their respective ranges in texas. using a geographic information system (gis), we calculated a potential hazard index (phi) for 31 bird and ten bat species based upon the percentage of known or observed ...

The main objective of Present study is based on meteorological variables to estimate monthly Global Solar Radiation (GSR) on a horizontal surface. Monthly mean of maximum air temperature, relative humidity, sunshine hours and wind speed values between 1974 and 2008 for Tehran city in Iran (35_41N, 51_19E), are used in this study. In order to investigate the effect of each meteorological variabl...

Air moving into the open end of a passive sampler affects the pollutant mass transfer by generating eddies leading to a reduction in the molecular diffusion length and a consequent overestimation of the pollutant concentration. This decrease is found to be experimentaly in the range of 10-40 % depending on the wind speed at the site. Assuming that the eddy turbulence is isotropic and the horizo...

Patterns can be extracted from historical data and used to make predictions of future events. Such predictions are useful to support decision makers in various areas. In this study the sliding window technique is used to reveal forest fire patterns that relate four meteorological conditions (temperature, relative humidity, wind speed and rainfall) with burnt area size. Extracted patterns are th...

The effects of air temperature, relative and specific humidity, wind speed, solar shortwave radiation, thermal longwave radiation, and rain on the performance of participants in the annual Stockholm Marathon from 1980 to 2008 were analysed statistically. The objective was to validate and extend previous studies by including data on finishing times of slower male and female runners and on the pe...