Downward Heat Flux at Sea Water Surface (Omon.hfds) in GFDL-CM4 historical simulations --- high values

cp4cds / cmip6_range_check_old

CMIP6 Data Range Check: extract and evaluate information about range of data values in CMIP6 datasets.

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Downward Heat Flux at Sea Water Surface (Omon.hfds) in GFDL-CM4 historical simulations --- high values #21

Open martinjuckes opened 4 years ago

martinjuckes commented 4 years ago

The datasets below have suspicious maximum values for Omon.fgco2: 16891 and 16194 W m-2 respectively, compared to maxima up to 360 W m-2 in the rest of the multi-model ensemble.

The two datasets showing this problem are:

hdl:21.14100/8d14b9ed-0c8a-3665-b0c9-5f2c21ed6e53 CMIP6.CMIP.NOAA-GFDL.GFDL-CM4.historical.r1i1p1f1.Omon.hfds.gn.v20180701

hdl:21.14100/d3025031-164f-3280-98f5-76c216b5aeb5 CMIP6.CMIP.NOAA-GFDL.GFDL-CM4.historical.r1i1p1f1.Omon.hfds.gr.v20180701

gfdl.climate.model.info@noaa.gov

martinjuckes commented 4 years ago

Response from GFDL:

Looking at the CM4 historical run, I found large values of hfds adjacent to tropical coasts where there is a large amount of river runoff. I believe that these come from the heat flux that accompanies the runoff to account for the temperature of the water entering the ocean. A reference of 0C is used for this purpose so the heat flux is large in warm regions. The heat flux is basically what is needed to raise the water input from 0C to a tropical temperature. Long story short: I think these fluxes are correct.

Regards, GFDL Climate Model Info Team