what's the relationship between LEAFC_LOSS,FROOTC_LOSS and LITTERFALL?

[ncepulee@126_com]

Hi,all!when i checked the outout field of the CLM, I found the sum of LEAFC_LOSS and FROOTC_LOSS is smaller than the LITTERFALL. In my opinion , LEAFC_LOSS include litterfall flux and mortality flux,so do the FROOTC_LOSS. While LITTERFALL only include the litterfall flux of leaf and froot. So the LITTERFALL should be smaller than the sum of LEAFC_LOSS and FROOTC_LOSS. Which field's meaning i had misunderstood? Thanks anyone who gives advice in advance.

 

[oleson]

I can't provide a definitive answer but here are some comments from people here who are familiar with the code:
"I recall litterfall included mortality, harvest and fire C losses (which may not all be included in leafc_to_litter).  At some point it also sums up the display, xfer, and storage pools.  they really have to go into the code and see what all the components are, but are correct that leafc + rootc to litter < litterfall_C" "mortality & harvest are included, and then it makes sense that litterfall C is larger than leaf + root C to litter." In CNSummaryMod.F90, "litfall" appears to sum up leafc_to_litter, frootc_to_litter, mortality, and harvest.

 

[oleson]

I can't provide a definitive answer but here are some comments from people here who are familiar with the code:
"I recall litterfall included mortality, harvest and fire C losses (which may not all be included in leafc_to_litter).  At some point it also sums up the display, xfer, and storage pools.  they really have to go into the code and see what all the components are, but are correct that leafc + rootc to litter < litterfall_C" "mortality & harvest are included, and then it makes sense that litterfall C is larger than leaf + root C to litter." In CNSummaryMod.F90, "litfall" appears to sum up leafc_to_litter, frootc_to_litter, mortality, and harvest.

 

[ncepulee@126_com]

I have checked the source code. The other reason is litterfall aslo include  the CWD,so litterfall_C is larger than leafc+rootc loss.Thank you so much for yor reply.

 

[ncepulee@126_com]

I have checked the source code. The other reason is litterfall aslo include  the CWD,so litterfall_C is larger than leafc+rootc loss.Thank you so much for yor reply.