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Questions about the component "FHIST_BDRD"

anserwei

Johnny Wong
New Member
Hello, everyone,

I want to do historical run simulations with prescribed ocean and sea ice with CESM 2.1.3. My focus is on the atmospheric variables over the ocean. I found the "FHIST_BDRD" incorporates the ocean biogeochemistry settings. I am confused.

My questions:
(1) what does it mean "BGC CO2=diag, rad CO2=diag" ?

(2) the ocean model component (POP2) is inactive using DOCN, while the ocean biogeochemistry is active. Isn't the ocean biogeochemistry a part of the POP2?

(3) If ocean biogeochemistry is indeed active, does this mean variables like ocean chlorophyll concentration are interactive, changing throughout the simulation period? Consequently, would the simulation outputs not only encompass atmospheric variables but also ocean biogeochemical variables? Is my understanding correct?



FHIST_BDRD: HIST_CAM60_CLM50%BGC-CROP_CICE%PRES_DOCN%DOM_MOSART_CISM2%NOEVOLVE_SWAV_BGC%BDRD

Initialization TimeHIST1850: Pre-Industrial; 2000 present day:
Additional initialization times defined by components.
AtmosphereCAM60CAM cam6 physics:
LandCLM50%BGC-CROPclm5.0:BGC (vert. resol. CN and methane) with prognostic crop:
Sea-IceCICE%PRESSea ICE (cice) model version 5 :prescribed cice
OceanDOCN%DOMDOCN prescribed ocean mode
River runoffMOSARTMOSART: MOdel for Scale Adaptive River Transport
Land IceCISM2%NOEVOLVEcism2 (default, higher-order, can run in parallel):cism ice evolution turned off (this is the standard configuration unless you're explicitly interested in ice evolution):
WaveSWAVStub wave component
Ocean BiogeochemistryBGC%BDRDBGC CO2=diag, rad CO2=diag:


Thank you very much.

Best,

Johnny
 
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