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why gpp/npp in Amazon is poorly represented in CLM5

X

xiaoxiaokuishu

Ru Xu
Member
Hi, all

I validated the GPP/npp from CLM5 with modis GPP and NPP across Amazon region,
not sure why it is poor... In other tropical regions, it is not good (with r2 round 0.4), but it is ok.
However, in Amazon, it seems super poor. Not sure if it is an issue that well known?
1771593687374.png
 
slevis

slevis

Moderator
Staff member
Others may chime in here if they know, and meanwhile I will recommend that you look through the CLM5 literature for published documentation of the model's behavior in this region.
 
J

jinmuluo

Jinmu Luo
Member
xiaoxiaokuishu said:
Hi, all

I validated the GPP/npp from CLM5 with modis GPP and NPP across Amazon region,
not sure why it is poor... In other tropical regions, it is not good (with r2 round 0.4), but it is ok.
However, in Amazon, it seems super poor. Not sure if it is an issue that well known?
View attachment 7331
Click to expand...
Most of the Earth system models predict higher GPP in the tropics than the MODIS satellite does, because of the saturation of remote sensing LAI in the tropics. You can reference on some paper like https://doi.org/10.1002/2015RG000483,

1771957640543.png
 
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