Preliminary results suggest total C:N doesn't show enough spatial / latitudinal variability in MIMICS-CN.
@melanniehartman and Emily Kyker-Snowman suggested just increasing FI(struc) from 0.1 to 0.3 to evaluate the model sensitivity to this parameter change.
As expected, this increased soil C:N by increasing C stocks the SOMc pool (and decreasing LITs).
Mean C:N = 13 [range 6-31] when FI=0.3 vs.
Mean CN = 11 [range 6-18] when FI = 0.1
Results in boreal forests look promising, but changes in the tropics are not as convincing.
Moreover, increases in tropical SOC stocks are w/in reality, but maybe shouldn't keep increasing?
I'm assuming that increases in total C:N are driven by increases in SOMc, but most of the tropical SOM in in the SOMp pools, resulting in modest changes in tropical total C:N.
The other interesting bit, is that by decreasing LITs, we're also driving a shift in microbial community composition, with a higher relative fraction of MICr in the new simulations
NOTE the new simulation (FI = 0.3, blue lines) are not yet spun up completely and results are subject to change.
Here's the breakdown of individual pools sizes by latitude for each simulation
Preliminary results suggest total C:N doesn't show enough spatial / latitudinal variability in MIMICS-CN.
@melanniehartman and Emily Kyker-Snowman suggested just increasing
FI(struc)
from 0.1 to 0.3 to evaluate the model sensitivity to this parameter change.SOMc
pool (and decreasingLITs
).SOMc
, but most of the tropical SOM in in theSOMp
pools, resulting in modest changes in tropical total C:N.The other interesting bit, is that by decreasing
LITs
, we're also driving a shift in microbial community composition, with a higher relative fraction ofMICr
in the new simulationsNOTE the new simulation (FI = 0.3, blue lines) are not yet spun up completely and results are subject to change.![image](https://user-images.githubusercontent.com/8031012/100749264-ac654000-33a1-11eb-91e9-375417c45d58.png)
Here's the breakdown of individual pools sizes by latitude for each simulation![image](https://user-images.githubusercontent.com/8031012/100749949-986e0e00-33a2-11eb-8400-f2eefe8d37d5.png)