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Slab Ocean forcing file and model output for "Seasonal Transitions and the Westerly Jet in the Holocene East Asian Summer Monsoon"

Citation

Kong, Wenwen; Swenson, Leif; Chiang, John (2017), Slab Ocean forcing file and model output for "Seasonal Transitions and the Westerly Jet in the Holocene East Asian Summer Monsoon", v2, UC Berkeley Dash, Dataset, https://doi.org/10.6078/D1T67F

Abstract

This dataset contains slab ocean forcing file and key model outputs from CAM5 simulations used in:

Kong, W., L.M. Swenson, and J.C.H. Chiang, Seasonal Transitions and the Westerly Jet in the Holocene East Asian Summer Monsoon. Journal of Climate, doi:10.1175/JCLI-D-16-0087.1 link

Methods

Data collection:

This dataset was generated from numerical experiments. We used the Community Earth System Model (CESM) 1.2.2 and chose the compset "E_1850_CAM5", which includes the coupler, active atmosphere, land, and ice components, and a static slab ocean. The atmospheric component is the Community Atmosphere Model version 5 (CAM5) at 0.9x1.25 horizontal resolution and 30 layers of vertical resolution. The ocean heat transport convergence (i.e., the "Q-flux") from a CESM1 preindustrial fully coupled run is prescribed to the slab ocean model to achieve a simulated sea surface temeprature close to the preindustrial. Each experiment was integrated for 60 years, and the last 30 years were averaged to generate climatology. This dataset includes daily or monthly climatology of key variables from four simulations: preindustrial (PI), 3000 years ago (3ka), 6000 years ago (6ka), and 9000 years ago (9ka). 

See Kong et al. (2017) for more details. 

Data processing:

The vertical coordinate of model output were interpolated from hybrid coordinate to pressure coordinate using NCAR Command Language (https://www.ncl.ucar.edu/Document/Functions/Built-in/vinth2p.shtml).

 

Usage Notes

Data Description

  • pop_frc.b.c40.B1850CN.f09_g16.100513.nc 
    • The slab ocean forcing file used in our simulations. The data was downloaded from the Yellowstone high performance IBM cluster at NCAR.
  • CAM5_SOM_PI_dayclim.nc, CAM5_SOM_6ka_dayclim.nc
    • Daily climatology
    • See Kong et al. (2017) for details on calculations of relative vorticity and moist static energy
  • CAM5_SOM_PI_monclim_DSTFLXT_PSL.nc, CAM5_SOM_PI_monclim_DSTFLXT_PSL.nc
    • Monthly climatology of surface dust emission and sea level pressure
  • CAM5_SOM_3ka_dayclim.nc, CAM5_SOM_9ka_dayclim.nc
    • Daily climatology of precipitation only
  • CAM5_SOM_PI_3ka_6ka_9ka_SOLIN.nc
    • Monthly climatology of global zonal averaged insolation from each run

 

 

Funding

National Science Foundation, Award: AGS-1405479