1 / 6

Choosing between different air-sea flux products to drive ocean models

Choosing between different air-sea flux products to drive ocean models Deciding between NCEP and ERA40 winds, Air temp, and Air humidity. Common Data Downward LW Downward SW Precipitation (ISCCP&CMAP). NCEP 10 m Wind vector 10 m Air Temperature 10 m Specific humidity. ERA40

foster
Download Presentation

Choosing between different air-sea flux products to drive ocean models

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Choosing between different air-sea flux products to drive ocean models Deciding between NCEP and ERA40 winds, Air temp, and Air humidity Common Data Downward LW Downward SW Precipitation (ISCCP&CMAP) NCEP 10 m Wind vector 10 m Air Temperature 10 m Specific humidity ERA40 10 m Wind vector 10 m Air Temperature 10 m Specific humidity Bulk Formulae (COARE Algorithm) SST Observations River Runoff CORE Fluxes QnetE-P-Rtx,ty HYB Fluxes QnetE-P-Rtx,ty

  2. Choosing between different air-sea flux products to drive ocean models Deciding between NCEP and ERA40 winds, Air temp, and Air humidity COREFluxes (1984-2000) QnetE-P-Rtx,ty Comparison of these data sets (mean and variability) will exhibit differences and similarities HYBFluxes (1984-2000) QnetE-P-Rtx,ty Can we predict the effect of these differences on the solution of an Ocean GCM?

  3. Ocean/sea-ice model integrated from 1984 to 2000 Forcing Set Downward LW Downward SW Precipitation From NCEP (CORE forcing) or From ERA40 (HYB forcing) 10 m Wind vector 10 m Air Temperature 10 m Specific humidity SST Bulk Formulae (COARE Algorithm) MODEL Fluxes Qnet E-P-R tx,ty River Runoff Compare MODEL-CORE , MODEL-HYB, CORE, and HYB fluxes With observed SST

  4. CORE HYB MODEL-CORE MODEL-HYB Zonally averaged net heat flux for the various cases • HYB suggest that more heat in the ocean, and should produce a warmer ocean • Fluxes diagnosed by the ocean model are similar • And it is CORE forcing which shows the greatest heating trend CORE forcing HYB Forcing Time evolution of the annual globally averaged ocean model temperature

  5. MODEL-CORE MODEL-HYB CORE HYB Annual global net heat flux imbalance for the various cases • Global imbalance (always positive here) is generally greater in HYB than in CORE suggesting that HYB should produce a warmer SST. • The global imbalance diagnosed by the model is reduced in both runs, but is always greater in CORE, and long term trends are different. • Meanwhile, trens and variability are similar in HYB and CORE. CORE forcing HYB Forcing Evolution of the annual globally averaged SST

  6. Choosing between different air-sea flux products to drive ocean models Deciding between NCEP and ERA40 winds, Air temp, and Air humidity COREFluxes (1984-2000) QnetE-P-Rtx,ty Comparison of these data sets (mean and variability) will exhibit differences and similarities HYBFluxes (1984-2000) QnetE-P-Rtx,ty Can we predict the effect of these differences on the solution of an Ocean GCM? No It is necessary to run the ocean model

More Related