The dispersal of pollutants in air is dependent on :
Wind speed and thermal stability both
Dispersion of a pollutant released into the air is governed by transport (advection) and by turbulent mixing in the atmospheric boundary layer.
Wind speed controls horizontal transport and dilution: in the Gaussian plume model the ground-level concentration varies inversely with the mean wind speed at stack height.
Thermal stability (the actual lapse rate compared with the dry adiabatic lapse rate) controls vertical mixing: unstable air spreads the plume, while stable air or an inversion traps it near the ground. That is why the Pasquill stability classes A–F combine surface wind speed with solar radiation or cloud cover.
Neither factor alone is enough, and humidity plays only a secondary role (fog or aerosol growth); it does not set the dilution rate the way wind and stability do.
Therefore pollutant dispersal depends jointly on wind speed and atmospheric stability.
Hence, Wind speed and thermal stability both.
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.................... is a client server application that identifies each host on the internet with a unique user-friendly name.
Every OS has a ................ or .......... which primarily resides in the main memory of the computer to perform some of the basic functions of the OS.
(i) Kernel
(ii) Interface
(iii) Nucleus
(iv) Compiler
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(i) Machine language
(ii) Assembly language
(iii) High level language
(iv) Natural language
Codes:
Match the following:
List I List II (a) New York Public Library (i) Shelv AR (b) Miami University Augmented Research Group (ii) Smart library (c) Oula University Library (iii) Wolf Walk (d) North Carolina State University (iv) Find the future Codes:
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