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Thread: NCEP REANALYSIS VARIABLE DESCRIPTION

  1. #1 NCEP REANALYSIS VARIABLE DESCRIPTION 
    New Member
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    Aug 2009
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    Hi There,

    Was wondering where I could obtain information on NCEP variables such as :

    Convective Precipitation Rate (units : kg/m^2/ s)

    Total Precipitation Rate

    If this is an indicator for rainfall, then what does a negative represent? And is the convective precipitation rate part of the total precipitation rate (i.e. the convective component of rainfall)


    Thanks in Advance


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  3. #2 Re: NCEP REANALYSIS VARIABLE DESCRIPTION 
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    Quote Originally Posted by golfy82
    Hi There,

    Was wondering where I could obtain information on NCEP variables such as :

    Convective Precipitation Rate (units : kg/m^2/ s)

    Total Precipitation Rate

    If this is an indicator for rainfall, then what does a negative represent? And is the convective precipitation rate part of the total precipitation rate (i.e. the convective component of rainfall)


    Thanks in Advance
    Not sure where you see the negative.

    Total precipitation = convective precipitation + stratiform precipitation

    Convection of course being from mostly small scale thermodynamic forced vertical clouds (cumulus) while stratiform is from larger scale dynamic forcing such as that associated with uplift over a mountain chain or broad low pressure area.

    I'm curious where you ran into the term. Even when I was working as a research meteorologist I didn't see them separated very often other than when we referenced model outputs--where stratiform precip is of large enough scale to be computed directly while convective precipitation is parameterized. Nature of course seldom has perfectly clean examples of either--even thunderheads have stratiform precip from the anvil and trailing clouds while often even large scale stratiform areas have small embedded cumulus towers.


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