Introduction to EdGCM

                                       EdGCM User Interface

•       Toolbar

•       Setup Simulation window

•       Analyze Output window

•       Panoply mapping tool

                                           EdGCM Toolbar

     Pause Run



     Start/Resume Run



     List of all runs





    Create new run setup



Duplicate existing setup for                modification

                                        Setup an EdGCM Run

•         Highlight any run from list

•         Open its Setup Simulation window                        (top menu bar → “Window” → “Setup
Simulations”)

•         In toolbar, click “New” button

•         New Setup window opens

•         Enter IDs, start & end dates

                                         Input File Setup

•        Choose input folder time period (in setup window)

•        For near past, present, & near future runs, use “Modern”

•        Choose reference year to match start date

•        Leave initial & boundary conditions at default

                                        Ocean Mode Options

•        “Predict SST” lets model predict SSTs throughout the run

•        “Specify SST” uses observed SSTs, should not be used for future or paleoclimate runs

•        Leave other ocean options at default

                                          Setup Forcings

•         Use “observed” values - enter year & click “Set”

•         Or enter values of your choice

•         Solar luminosity values available 1500 – 1998

•         GHG values available 1850 – 2050

–     1850-1957: ice core bubbles

–     1958-2000: observed

–     2001-2050: projections









•         Entered values remain constant throughout run, unless . . .

                                       Forcings Trend Setup

•         Enable trend(s) to change values over time

•         For solar luminosity & each GHG

•         Choose trend type (i.e. linear, exponential)

•         Enter change per year

•         Enter start & end years of trend

•         Note: start & end years of trend(s) not confined to start & end dates of run

•         Click “View” icon to see values trend produces



                                           Run the Model

•       After setup, highlight run ID                  in run list

•       Click start button

•       Calculates one cycle, then stops

•       Click start button again to finish run

•       Can pause run any time & resume later

•       When complete, close & restart EdGCM (necessary to analyze output)

                                      Analyze Output: Tables

•        Highlight run in list

•        Open its Analyze Output window          (top menu bar → “Window” → “Analyze Output”)

•        Select “Tables” tab

•        Select start & end years for averaging

•        Click “Average” button

•        Check boxes of time period averages to view (months, seasons, annual)

•        Click “Get Tables” button

•        Highlight table name & click “View”



                                       Analyze Output: Plots

•        Analyze Output window → “Plots” tab

•        Select start and end years

•        Click “Time Series” button

•        Select variables to plot

•        Click “Get Plots”

•        Highlight plot name you                         wish to view

•        Click “View”

•        Excel opens & data may be easily plotted

                                       Analyze Output: Maps

•        Analyze Output window → “Maps” tab

•        Select start & end years for averaging

•        Click “Average”

•        Select time period(s) to map (i.e. annual)

•        Select variables to map

•        Click “Get Maps”

•        Highlight time period in “Viewable Maps” list

•        Click “View”

                                       Panoply Mapping Tool

•        After clicking “View”, Panoply opens

•        Highlight map name

•        Click “Create Plot”

•        Many map options to choose             from

•        Drop down box to change time               period mapped (i.e. ANN, DJF,
JAN)

•        Note: map will be lost if you close map window without saving

                                     Analyze Output: Vertical

•        In Analyze Output window, “Vertical” tab

•        Procedure is similar to “Maps” tab

•        Vertical profile also uses Panoply

•        Zonal averages depicted in profile

                                          Known Problems

•       First calendar year of any run cannot be analyzed

•       SST cannot be mapped

•       Map images do not save well

•       In some cases, data for a certain range of years cannot be averaged for analysis

•       Vertical profile variable check boxes are off by one

                                            Sample Run

•         Start: 12/01/2005      End: 12/31/2007

•         Input folder: Modern

•         Reference Year: 2005

•         Predict SST

•         Choose to generate monthly average data tables

•         Solar: 1998 value

•         GHGs: 2005 values

•         Choose to enable CO2 trend

•         Linear (ppm) trend

•         2.75 ppm CO2 change per year (~2x current rate)

•         Trend From: 2006     To: 2007