PlaSim parameterizations
PlaSim parameterizations
PlaSim parameterizations
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Meteorologisches Inst. - Theoretische Meteorologie<br />
<strong>PlaSim</strong> Sub-System:<br />
Land Vegetation<br />
• Model: Simulator for Biospheric Aspects<br />
(SIMBA; by Axel Kleidon et al.)<br />
• Empirical formulas<br />
• Prog. variable: vegetative Biomass BM<br />
• Diagnostic variables: Net primary<br />
productivity NPP, soil water content, albedo,<br />
roughness, leaf area index, vegetation<br />
cover, forest cover, etc.<br />
Time evolution of biomass: N«¬<br />
N~<br />
= pp − «¬<br />
O® ¯<br />
pp = 0.5 ∙ °pp = 0.5 ∙ min (°pp xq‚^~, °pp ¦6~±²)<br />
Gross Primary Production GPP:<br />
a) light limited: °pp xq‚^~ = b A´ B, µsb·l¨ ¨¸{. , R¹ºiº·sR µ¹e·s s·Rc·Wc¹i, …<br />
b) water limited: °pp ¦6~±² = b(A´ B, ¸¹cµWs¨, W¨¸{¨s·Ws¨, ¨„·{¹Ws·iµ. , {s¨µµs¨, … )
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