Meteorology is the interdisciplinary scientific study of the atmosphere.

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What does “downshear” mean?

I occasionally read descriptions such as "downshear of the vortex" in meteorological publications. What does this mean?
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How can I interpret negative values of potential evapotranspiration?

If I extract Potential Evaporation (PET, W/m$^2$) from the National Centers for Environmental Prediction (NCEP), climate reanalysis data (downloadable as netCDF files here), there are some negative ...
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Hildring - Influence of vertical temperature gradient on light beam curvature

In special atmospheric condition it is possible to see coastline that normally is behind the horizon. It is apparently lifted to become visible. In Scandinavian the phenomenon is called 'hildring', a ...
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99 views

What is the domain of validity of the Omega equation?

The Omega eqation is used in meteorology for estimate the value of the vertical velocity. Considering that the horizontal velocity field and density is given by observation. Under which condition ...
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How much does barometric pressure change over minutes?

I have to correct an ongoing experiment for atmospheric pressure. This means that during the experiment I must read a chip that measures barometric pressure. The question becomes one of how rapidly I ...
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Would it be possible/feasible to build an iPhone app that accurately helps predict when it will rain during the day?

Let me start off by saying I'm an iPhone app developer. The iPhone 6 has a built-in barometer. So far, I've figured out a way to estimate the sea level pressure - I get the altitude using GPS and ...
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24 views

Difference between mixing ratio and mole fraction

I have been reading 'The Atmosphere of Venus' by V.I. Moroz which is available here. I am confused about the term 'mixing ratio' which is used on discussions in chemical composition. From what I ...
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72 views

How can I calculate dew point from relative humidity and temperature?

Meteorilogical stations in my country report relative humidity. I am not sure why as this is actually misleading, as relative humidity will change with temperature. Unless I miss my guess, what is ...