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In IFS, leaf area index varies only with climatology, month by month.  Separation of HTESSEL "tiles" into high and low vegetation gives a more accurate seasonal variability of vegetation.  Anomalous weather (e.g. winds stripping trees of leaf), widespread fire damage (e.g. major change of albedo), etc are not taken into account.

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Fig2A.1.4.7-1: Example leaf area index (LAI) as shown in the surface parameters charts. The LAI is taken from climatological data.  Anomalous weather has not had an effect.  Higher values mean more evapotranspiration, and therefore greater fluxes of moisture into the atmosphere.  An additional contributor to these moisture fluxes is bare-ground evaporation - this is not represented here.  HTESSEL deals with these aspects in more detail.  See the current leaf area index chart.



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