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Josh Fisher - CESM | Community Earth System Model

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JULES with and without ECOSSE and FUN<br />

RothC<br />

JULES- ECOSSE- FUN<br />

JULES v3.2 (and before)<br />

Plant N uptake: None<br />

4 soil carbon pools<br />

• Decomposable plant<br />

material<br />

• Resistant plant material<br />

• Biomass<br />

• Humus<br />

• No structure with depth.<br />

• Plant growth assumes no<br />

restriction by soil N.<br />

JULES v(next) – ECOSSE and FUN additions<br />

ECOSSE<br />

• ECOSSE is (essentially) a layered combination of RothC and a soil N<br />

model: RothC → SUNDIAL → ECOSSE<br />

Plant N uptake: FUN<br />

4 soil carbon pools<br />

- layered<br />

• Decomposable plant<br />

material<br />

• Resistant plant material<br />

• Biomass<br />

• Humus<br />

6 soil nitrogen pools<br />

• Nitrate, ammonium + 4 pools as for C<br />

• Plants acquire N via passive and active mechanisms.<br />

• Active uptake reduces NPP reduced plant growth.

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