diff --git a/env/HERA.env b/env/HERA.env
index b010293e8f..fbfdb68e92 100755
--- a/env/HERA.env
+++ b/env/HERA.env
@@ -49,6 +49,10 @@ elif [[ "${step}" = "prepsnowobs" ]]; then
 
     export APRUN_CALCFIMS="${launcher} -n 1"
 
+elif [[ "${step}" = "prep_emissions" ]]; then
+
+    export APRUN="${launcher} -n 1"
+
 elif [[ "${step}" = "waveinit" ]] || [[ "${step}" = "waveprep" ]] || [[ "${step}" = "wavepostsbs" ]] || [[ "${step}" = "wavepostbndpnt" ]] || [[ "${step}" = "wavepostbndpntbll" ]] || [[ "${step}" = "wavepostpnt" ]]; then
 
     export CFP_MP="YES"
diff --git a/env/HERCULES.env b/env/HERCULES.env
index da5ad972f2..0b62120536 100755
--- a/env/HERCULES.env
+++ b/env/HERCULES.env
@@ -45,6 +45,10 @@ case ${step} in
 
     export APRUN_CALCFIMS="${launcher} -n 1"
  ;;
+ "prep_emissions")
+
+    export APRUN="${launcher} -n 1"
+ ;;
  "waveinit" | "waveprep" | "wavepostsbs" | "wavepostbndpnt" | "wavepostpnt" | "wavepostbndpntbll")
 
     export CFP_MP="YES"
diff --git a/env/JET.env b/env/JET.env
index 3b4c2c2c53..976e42a025 100755
--- a/env/JET.env
+++ b/env/JET.env
@@ -37,6 +37,10 @@ elif [[ "${step}" = "prepsnowobs" ]]; then
 
     export APRUN_CALCFIMS="${launcher} -n 1"
 
+elif [[ "${step}" = "prep_emissions" ]]; then
+
+    export APRUN="${launcher} -n 1"
+
 elif [[ "${step}" = "waveinit" ]] || [[ "${step}" = "waveprep" ]] || [[ "${step}" = "wavepostsbs" ]] || [[ "${step}" = "wavepostbndpnt" ]] || [[ "${step}" = "wavepostbndpntbll" ]] || [[ "${step}" = "wavepostpnt" ]]; then
 
     export CFP_MP="YES"
diff --git a/env/ORION.env b/env/ORION.env
index 24cb17bb0d..1b66ca65c0 100755
--- a/env/ORION.env
+++ b/env/ORION.env
@@ -44,6 +44,10 @@ elif [[ "${step}" = "prepsnowobs" ]]; then
 
     export APRUN_CALCFIMS="${launcher} -n 1"
 
+elif [[ "${step}" = "prep_emissions" ]]; then
+
+    export APRUN="${launcher} -n 1"
+
 elif [[ "${step}" = "waveinit" ]] || [[ "${step}" = "waveprep" ]] || [[ "${step}" = "wavepostsbs" ]] || \
     [[ "${step}" = "wavepostbndpnt" ]] || [[ "${step}" = "wavepostpnt" ]] || [[ "${step}" == "wavepostbndpntbll" ]]; then
 
diff --git a/env/S4.env b/env/S4.env
index 9cbf8b7bdb..ce68fddb89 100755
--- a/env/S4.env
+++ b/env/S4.env
@@ -37,6 +37,10 @@ elif [[ "${step}" = "prepsnowobs" ]]; then
 
     export APRUN_CALCFIMS="${launcher} -n 1"
 
+elif [[ "${step}" = "prep_emissions" ]]; then
+
+    export APRUN="${launcher} -n 1"
+
 elif [[ "${step}" = "waveinit" ]] || [[ "${step}" = "waveprep" ]] || [[ "${step}" = "wavepostsbs" ]] || [[ "${step}" = "wavepostbndpnt" ]] || [[ "${step}" = "wavepostbndpntbll" ]] || [[ "${step}" = "wavepostpnt" ]]; then
 
     export CFP_MP="YES"
diff --git a/env/WCOSS2.env b/env/WCOSS2.env
index ba55495655..ff0121e034 100755
--- a/env/WCOSS2.env
+++ b/env/WCOSS2.env
@@ -31,6 +31,10 @@ elif [[ "${step}" = "prepsnowobs" ]]; then
 
     export APRUN_CALCFIMS="${launcher} -n 1"
 
+elif [[ "${step}" = "prep_emissions" ]]; then
+
+    export APRUN="${launcher} -n 1"
+
 elif [[ "${step}" = "waveinit" ]] || [[ "${step}" = "waveprep" ]] || [[ "${step}" = "wavepostsbs" ]] || [[ "${step}" = "wavepostbndpnt" ]] || [[ "${step}" = "wavepostbndpntbll"  ]] || [[ "${step}" = "wavepostpnt" ]]; then
 
     export USE_CFP="YES"
diff --git a/jobs/JGLOBAL_PREP_EMISSIONS b/jobs/JGLOBAL_PREP_EMISSIONS
new file mode 100755
index 0000000000..84edac8e50
--- /dev/null
+++ b/jobs/JGLOBAL_PREP_EMISSIONS
@@ -0,0 +1,35 @@
+#! /usr/bin/env bash
+
+source "${HOMEgfs}/ush/preamble.sh"
+source "${HOMEgfs}/ush/jjob_header.sh" -e "prep_emissions" -c "base prep_emissions"
+
+##############################################
+# Set variables used in the script
+##############################################
+# TODO: Set local variables used in this script e.g. GDATE may be needed for previous cycle
+
+##############################################
+# Begin JOB SPECIFIC work
+##############################################
+# Generate COM variables from templates
+# TODO: Add necessary COMIN, COMOUT variables for this job
+
+###############################################################
+# Run relevant script
+EXSCRIPT=${PREP_EMISSIONS_PY:-${SCRgfs}/exglobal_prep_emissions.py}
+${EXSCRIPT}
+status=$?
+(( status != 0 )) && ( echo "FATAL ERROR: Error executing ${EXSCRIPT}, ABORT!"; exit "${status}" )
+
+##############################################
+# End JOB SPECIFIC work
+##############################################
+
+##############################################
+# Final processing
+##############################################
+if [[ -e "${pgmout}" ]] ; then
+  cat "${pgmout}"
+fi
+
+exit 0
diff --git a/jobs/rocoto/prep_emissions.sh b/jobs/rocoto/prep_emissions.sh
new file mode 100755
index 0000000000..0677073947
--- /dev/null
+++ b/jobs/rocoto/prep_emissions.sh
@@ -0,0 +1,23 @@
+#! /usr/bin/env bash
+
+source "${HOMEgfs}/ush/preamble.sh"
+
+###############################################################
+# Source UFSDA workflow modules
+source "${HOMEgfs}/ush/load_fv3gfs_modules.sh"
+status=$?
+(( status !=  0 )) && exit "${status}"
+
+export job="prep_emissions"
+export jobid="${job}.$$"
+
+###############################################################
+# setup python path for workflow utilities and tasks
+PYTHONPATH="${PYTHONPATH:+${PYTHONPATH}:}${HOMEgfs}/ush/python"
+export PYTHONPATH
+
+###############################################################
+# Execute the JJOB
+"${HOMEgfs}/jobs/JGLOBAL_PREP_EMISSIONS"
+status=$?
+exit "${status}"
diff --git a/parm/config/gefs/config.prep_emissions b/parm/config/gefs/config.prep_emissions
new file mode 100644
index 0000000000..fa411c27ad
--- /dev/null
+++ b/parm/config/gefs/config.prep_emissions
@@ -0,0 +1,11 @@
+#! /usr/bin/env bash
+
+########## config.prep_emissions ##########
+# aerosol emissions preprocessing specific
+
+echo "BEGIN: config.prep_emissions"
+
+# Get task specific resources
+source "${EXPDIR}/config.resources" prep_emissions
+
+echo "END: config.prep_emissions"
diff --git a/parm/config/gefs/config.resources b/parm/config/gefs/config.resources
index 9bf62cf514..d98e437359 100644
--- a/parm/config/gefs/config.resources
+++ b/parm/config/gefs/config.resources
@@ -69,6 +69,14 @@ case ${step} in
     export memory_waveinit="2GB"
     ;;
 
+  "prep_emissions")
+    export wtime_prep_emissions="00:10:00"
+    export npe_prep_emissions=1
+    export nth_prep_emissions=1
+    export npe_node_prep_emissions=$(( npe_node_max / nth_prep_emissions ))
+    export memory_prep_emissions="1GB"
+    ;;
+
   "fcst" | "efcs")
     export is_exclusive=True
 
diff --git a/parm/config/gfs/config.aeroanl b/parm/config/gfs/config.aeroanl
index 972f393feb..24a5e92644 100644
--- a/parm/config/gfs/config.aeroanl
+++ b/parm/config/gfs/config.aeroanl
@@ -18,7 +18,7 @@ export JEDI_FIX_YAML="${PARMgfs}/gdas/aero_jedi_fix.yaml.j2"
 export io_layout_x=@IO_LAYOUT_X@
 export io_layout_y=@IO_LAYOUT_Y@
 
-export JEDIEXE="${EXECgfs}/fv3jedi_var.x"
+export JEDIEXE="${EXECgfs}/gdas.x"
 
 if [[ "${DOIAU}" == "YES" ]]; then
   export aero_bkg_times="3,6,9"
diff --git a/parm/config/gfs/config.atmanl b/parm/config/gfs/config.atmanl
index 7cfd0cb47f..5eb692b473 100644
--- a/parm/config/gfs/config.atmanl
+++ b/parm/config/gfs/config.atmanl
@@ -28,6 +28,6 @@ export layout_y_atmanl=@LAYOUT_Y_ATMANL@
 export io_layout_x=@IO_LAYOUT_X@
 export io_layout_y=@IO_LAYOUT_Y@
 
-export JEDIEXE=${EXECgfs}/fv3jedi_var.x
+export JEDIEXE=${EXECgfs}/gdas.x
 
 echo "END: config.atmanl"
diff --git a/parm/config/gfs/config.atmensanl b/parm/config/gfs/config.atmensanl
index 8e824b22f6..23eab7f7b9 100644
--- a/parm/config/gfs/config.atmensanl
+++ b/parm/config/gfs/config.atmensanl
@@ -18,6 +18,6 @@ export layout_y_atmensanl=@LAYOUT_Y_ATMENSANL@
 export io_layout_x=@IO_LAYOUT_X@
 export io_layout_y=@IO_LAYOUT_Y@
 
-export JEDIEXE=${EXECgfs}/fv3jedi_letkf.x
+export JEDIEXE=${EXECgfs}/gdas.x
 
 echo "END: config.atmensanl"
diff --git a/parm/config/gfs/config.snowanl b/parm/config/gfs/config.snowanl
index 7b3ffa47f3..a2984f190b 100644
--- a/parm/config/gfs/config.snowanl
+++ b/parm/config/gfs/config.snowanl
@@ -11,7 +11,7 @@ source "${EXPDIR}/config.resources" snowanl
 export OBS_LIST="${PARMgfs}/gdas/snow/obs/lists/gdas_snow.yaml.j2"
 
 # Name of the JEDI executable and its yaml template
-export JEDIEXE="${EXECgfs}/fv3jedi_letkf.x"
+export JEDIEXE="${EXECgfs}/gdas.x"
 export JEDIYAML="${PARMgfs}/gdas/snow/letkfoi/letkfoi.yaml.j2"
 
 # Ensemble member properties
diff --git a/scripts/exglobal_prep_emissions.py b/scripts/exglobal_prep_emissions.py
new file mode 100755
index 0000000000..ef0e709142
--- /dev/null
+++ b/scripts/exglobal_prep_emissions.py
@@ -0,0 +1,25 @@
+#!/usr/bin/env python3
+# exglobal_prep_emissions.py
+# This script creates a emissions object
+# which perform the pre-processing for aerosol emissions
+import os
+
+from wxflow import Logger, cast_strdict_as_dtypedict
+from pygfs import AerosolEmissions
+
+
+# Initialize root logger
+logger = Logger(level=os.environ.get("LOGGING_LEVEL", "DEBUG"), colored_log=True)
+
+
+if __name__ == '__main__':
+
+    # Take configuration from environment and cast it as python dictionary
+    config = cast_strdict_as_dtypedict(os.environ)
+
+    # Instantiate the emissions pre-processing task
+    emissions = AerosolEmissions(config)
+    emissions.initialize()
+    emissions.configure()
+    emissions.execute(emissions.task_config.DATA, emissions.task_config.APRUN)
+    emissions.finalize()
diff --git a/sorc/gdas.cd b/sorc/gdas.cd
index 1b07517a22..70f1319139 160000
--- a/sorc/gdas.cd
+++ b/sorc/gdas.cd
@@ -1 +1 @@
-Subproject commit 1b07517a22cd569d35ee24d341c15a97fc6ad932
+Subproject commit 70f13191391d0909e92da47dc7d17ddf1dc4c6c6
diff --git a/sorc/link_workflow.sh b/sorc/link_workflow.sh
index e13b81dbc2..ac3520524a 100755
--- a/sorc/link_workflow.sh
+++ b/sorc/link_workflow.sh
@@ -334,33 +334,16 @@ fi
 
 # GDASApp
 if [[ -d "${HOMEgfs}/sorc/gdas.cd/build" ]]; then
-  declare -a JEDI_EXE=("fv3jedi_addincrement.x" \
-                       "fv3jedi_diffstates.x" \
-                       "fv3jedi_ensvariance.x" \
-                       "fv3jedi_hofx.x" \
-                       "fv3jedi_var.x" \
-                       "fv3jedi_convertincrement.x" \
-                       "fv3jedi_dirac.x" \
-                       "fv3jedi_error_covariance_training.x" \
-                       "fv3jedi_letkf.x" \
-                       "fv3jedi_convertstate.x" \
-                       "fv3jedi_eda.x" \
-                       "fv3jedi_forecast.x" \
+  declare -a JEDI_EXE=("gdas.x" \
+                       "gdas_soca_gridgen.x" \
+                       "gdas_soca_error_covariance_toolbox.x" \
+                       "gdas_soca_setcorscales.x" \
                        "fv3jedi_plot_field.x" \
-                       "fv3jedi_data_checker.py" \
-                       "fv3jedi_enshofx.x" \
-                       "fv3jedi_hofx_nomodel.x" \
-                       "fv3jedi_testdata_downloader.py" \
                        "fv3jedi_fv3inc.x" \
                        "gdas_ens_handler.x" \
                        "gdas_incr_handler.x" \
                        "gdas_obsprovider2ioda.x" \
                        "gdas_socahybridweights.x" \
-                       "soca_convertincrement.x" \
-                       "soca_error_covariance_training.x" \
-                       "soca_setcorscales.x" \
-                       "soca_gridgen.x" \
-                       "soca_var.x" \
                        "bufr2ioda.x" \
                        "calcfIMS.exe" \
                        "apply_incr.exe" )
diff --git a/ush/python/pygfs/__init__.py b/ush/python/pygfs/__init__.py
index e69de29bb2..fa6b0b373e 100644
--- a/ush/python/pygfs/__init__.py
+++ b/ush/python/pygfs/__init__.py
@@ -0,0 +1,16 @@
+
+import os
+
+from .task.analysis import Analysis
+from .task.aero_emissions import AerosolEmissions
+from .task.aero_analysis import AerosolAnalysis
+from .task.atm_analysis import AtmAnalysis
+from .task.atmens_analysis import AtmEnsAnalysis
+from .task.snow_analysis import SnowAnalysis
+from .task.upp import UPP
+from .task.oceanice_products import OceanIceProducts
+from .task.gfs_forecast import GFSForecast
+
+__docformat__ = "restructuredtext"
+__version__ = "0.1.0"
+pygfs_directory = os.path.dirname(__file__)
diff --git a/ush/python/pygfs/task/aero_analysis.py b/ush/python/pygfs/task/aero_analysis.py
index a61b7c82f3..16d2735090 100644
--- a/ush/python/pygfs/task/aero_analysis.py
+++ b/ush/python/pygfs/task/aero_analysis.py
@@ -109,8 +109,10 @@ def execute(self: Analysis) -> None:
         chdir(self.task_config.DATA)
 
         exec_cmd = Executable(self.task_config.APRUN_AEROANL)
-        exec_name = os.path.join(self.task_config.DATA, 'fv3jedi_var.x')
+        exec_name = os.path.join(self.task_config.DATA, 'gdas.x')
         exec_cmd.add_default_arg(exec_name)
+        exec_cmd.add_default_arg('fv3jedi')
+        exec_cmd.add_default_arg('variational')
         exec_cmd.add_default_arg(self.task_config.jedi_yaml)
 
         try:
diff --git a/ush/python/pygfs/task/aero_emissions.py b/ush/python/pygfs/task/aero_emissions.py
new file mode 100644
index 0000000000..17d2f528e4
--- /dev/null
+++ b/ush/python/pygfs/task/aero_emissions.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+
+import os
+from logging import getLogger
+from typing import Dict, Any, Union
+from pprint import pformat
+
+from wxflow import (AttrDict,
+                    parse_j2yaml,
+                    FileHandler,
+                    Jinja,
+                    logit,
+                    Task,
+                    add_to_datetime, to_timedelta,
+                    WorkflowException,
+                    Executable, which)
+
+logger = getLogger(__name__.split('.')[-1])
+
+
+class AerosolEmissions(Task):
+    """Aerosol Emissions pre-processing Task
+    """
+
+    @logit(logger, name="AerosolEmissions")
+    def __init__(self, config: Dict[str, Any]) -> None:
+        """Constructor for the Aerosol Emissions task
+
+        Parameters
+        ----------
+        config : Dict[str, Any]
+            Incoming configuration for the task from the environment
+
+        Returns
+        -------
+        None
+        """
+        super().__init__(config)
+
+        local_variable = "something"
+
+        localdict = AttrDict(
+            {'variable_used_repeatedly': local_variable}
+        )
+        self.task_config = AttrDict(**self.config, **self.runtime_config, **localdict)
+
+    @staticmethod
+    @logit(logger)
+    def initialize() -> None:
+        """Initialize the work directory
+        """
+
+    @staticmethod
+    @logit(logger)
+    def configure() -> None:
+        """Configure the artifacts in the work directory.
+        Copy run specific data to run directory
+        """
+
+    @staticmethod
+    @logit(logger)
+    def execute(workdir: Union[str, os.PathLike], aprun_cmd: str) -> None:
+        """Run the executable (if any)
+
+        Parameters
+        ----------
+        workdir : str | os.PathLike
+            work directory with the staged data, parm files, namelists, etc.
+        aprun_cmd : str
+            launcher command for executable.x
+
+        Returns
+        -------
+        None
+        """
+
+    @staticmethod
+    @logit(logger)
+    def finalize() -> None:
+        """Perform closing actions of the task.
+        Copy data back from the DATA/ directory to COM/
+        """
diff --git a/ush/python/pygfs/task/analysis.py b/ush/python/pygfs/task/analysis.py
index 02011423b7..5a516a02c8 100644
--- a/ush/python/pygfs/task/analysis.py
+++ b/ush/python/pygfs/task/analysis.py
@@ -292,46 +292,6 @@ def get_fv3ens_dict(config: Dict[str, Any]) -> Dict[str, Any]:
         }
         return ens_dict
 
-    @staticmethod
-    @logit(logger)
-    def execute_jediexe(workdir: Union[str, os.PathLike], aprun_cmd: str, jedi_exec: str, jedi_yaml: str) -> None:
-        """
-        Run a JEDI executable
-
-        Parameters
-        ----------
-        workdir : str | os.PathLike
-            Working directory where to run containing the necessary files and executable
-        aprun_cmd : str
-            Launcher command e.g. mpirun -np <ntasks> or srun, etc.
-        jedi_exec : str
-            Name of the JEDI executable e.g. fv3jedi_var.x
-        jedi_yaml : str | os.PathLike
-            Name of the yaml file to feed the JEDI executable e.g. fv3jedi_var.yaml
-
-        Raises
-        ------
-        OSError
-            Failure due to OS issues
-        WorkflowException
-            All other exceptions
-        """
-
-        os.chdir(workdir)
-
-        exec_cmd = Executable(aprun_cmd)
-        exec_cmd.add_default_arg([os.path.join(workdir, jedi_exec), jedi_yaml])
-
-        logger.info(f"Executing {exec_cmd}")
-        try:
-            exec_cmd()
-        except OSError:
-            logger.exception(f"FATAL ERROR: Failed to execute {exec_cmd}")
-            raise OSError(f"{exec_cmd}")
-        except Exception:
-            logger.exception(f"FATAL ERROR: Error occured during execution of {exec_cmd}")
-            raise WorkflowException(f"{exec_cmd}")
-
     @staticmethod
     @logit(logger)
     def tgz_diags(statfile: str, diagdir: str) -> None:
diff --git a/ush/python/pygfs/task/atm_analysis.py b/ush/python/pygfs/task/atm_analysis.py
index ebeb0c7ba6..47d291268e 100644
--- a/ush/python/pygfs/task/atm_analysis.py
+++ b/ush/python/pygfs/task/atm_analysis.py
@@ -118,8 +118,10 @@ def variational(self: Analysis) -> None:
         chdir(self.task_config.DATA)
 
         exec_cmd = Executable(self.task_config.APRUN_ATMANLVAR)
-        exec_name = os.path.join(self.task_config.DATA, 'fv3jedi_var.x')
+        exec_name = os.path.join(self.task_config.DATA, 'gdas.x')
         exec_cmd.add_default_arg(exec_name)
+        exec_cmd.add_default_arg('fv3jedi')
+        exec_cmd.add_default_arg('variational')
         exec_cmd.add_default_arg(self.task_config.jedi_yaml)
 
         try:
@@ -144,10 +146,17 @@ def init_fv3_increment(self: Analysis) -> None:
     @logit(logger)
     def fv3_increment(self: Analysis) -> None:
         # Run executable
-        self.execute_jediexe(self.runtime_config.DATA,
-                             self.task_config.APRUN_ATMANLFV3INC,
-                             self.task_config.jedi_exe,
-                             self.task_config.jedi_yaml)
+        exec_cmd = Executable(self.task_config.APRUN_ATMANLFV3INC)
+        exec_cmd.add_default_arg(self.task_config.jedi_exe)
+        exec_cmd.add_default_arg(self.task_config.jedi_yaml)
+
+        try:
+            logger.debug(f"Executing {exec_cmd}")
+            exec_cmd()
+        except OSError:
+            raise OSError(f"Failed to execute {exec_cmd}")
+        except Exception:
+            raise WorkflowException(f"An error occured during execution of {exec_cmd}")
 
     @logit(logger)
     def finalize(self: Analysis) -> None:
diff --git a/ush/python/pygfs/task/atmens_analysis.py b/ush/python/pygfs/task/atmens_analysis.py
index 1037b557c2..a1aecfe07c 100644
--- a/ush/python/pygfs/task/atmens_analysis.py
+++ b/ush/python/pygfs/task/atmens_analysis.py
@@ -148,8 +148,10 @@ def execute(self: Analysis) -> None:
         chdir(self.task_config.DATA)
 
         exec_cmd = Executable(self.task_config.APRUN_ATMENSANL)
-        exec_name = os.path.join(self.task_config.DATA, 'fv3jedi_letkf.x')
+        exec_name = os.path.join(self.task_config.DATA, 'gdas.x')
         exec_cmd.add_default_arg(exec_name)
+        exec_cmd.add_default_arg('fv3jedi')
+        exec_cmd.add_default_arg('localensembleda')
         exec_cmd.add_default_arg(self.task_config.jedi_yaml)
 
         try:
diff --git a/ush/python/pygfs/task/snow_analysis.py b/ush/python/pygfs/task/snow_analysis.py
index c149f140b6..fe21a67536 100644
--- a/ush/python/pygfs/task/snow_analysis.py
+++ b/ush/python/pygfs/task/snow_analysis.py
@@ -310,10 +310,20 @@ def execute(self) -> None:
                              AttrDict({key: localconf[key] for key in ['DATA', 'ntiles', 'current_cycle']}))
 
         logger.info("Running JEDI LETKF")
-        self.execute_jediexe(localconf.DATA,
-                             localconf.APRUN_SNOWANL,
-                             os.path.basename(localconf.JEDIEXE),
-                             localconf.jedi_yaml)
+        exec_cmd = Executable(localconf.APRUN_SNOWANL)
+        exec_name = os.path.join(localconf.DATA, 'gdas.x')
+        exec_cmd.add_default_arg(exec_name)
+        exec_cmd.add_default_arg('fv3jedi')
+        exec_cmd.add_default_arg('localensembleda')
+        exec_cmd.add_default_arg(localconf.jedi_yaml)
+
+        try:
+            logger.debug(f"Executing {exec_cmd}")
+            exec_cmd()
+        except OSError:
+            raise OSError(f"Failed to execute {exec_cmd}")
+        except Exception:
+            raise WorkflowException(f"An error occured during execution of {exec_cmd}")
 
         logger.info("Creating analysis from backgrounds and increments")
         self.add_increments(localconf)
diff --git a/workflow/applications/gefs.py b/workflow/applications/gefs.py
index b14c1a9003..c165f9d1ca 100644
--- a/workflow/applications/gefs.py
+++ b/workflow/applications/gefs.py
@@ -27,6 +27,9 @@ def _get_app_configs(self):
         if self.do_ocean or self.do_ice:
             configs += ['oceanice_products']
 
+        if self.do_aero:
+            configs += ['prep_emissions']
+
         return configs
 
     @staticmethod
@@ -45,6 +48,9 @@ def get_task_names(self):
         if self.do_wave:
             tasks += ['waveinit']
 
+        if self.do_aero:
+            tasks += ['prep_emissions']
+
         tasks += ['fcst']
 
         if self.nens > 0:
diff --git a/workflow/rocoto/gefs_tasks.py b/workflow/rocoto/gefs_tasks.py
index 6ee079fdfa..86be494549 100644
--- a/workflow/rocoto/gefs_tasks.py
+++ b/workflow/rocoto/gefs_tasks.py
@@ -89,6 +89,27 @@ def waveinit(self):
 
         return task
 
+    def prep_emissions(self):
+        deps = []
+        dep_dict = {'type': 'task', 'name': f'stage_ic'}
+        deps.append(rocoto.add_dependency(dep_dict))
+        dependencies = rocoto.create_dependency(dep=deps)
+
+        resources = self.get_resource('prep_emissions')
+        task_name = 'prep_emissions'
+        task_dict = {'task_name': task_name,
+                     'resources': resources,
+                     'envars': self.envars,
+                     'cycledef': 'gefs',
+                     'command': f'{self.HOMEgfs}/jobs/rocoto/prep_emissions.sh',
+                     'job_name': f'{self.pslot}_{task_name}_@H',
+                     'log': f'{self.rotdir}/logs/@Y@m@d@H/{task_name}.log',
+                     'maxtries': '&MAXTRIES;'
+                     }
+        task = rocoto.create_task(task_dict)
+
+        return task
+
     def fcst(self):
         dependencies = []
         dep_dict = {'type': 'task', 'name': f'stage_ic'}
@@ -98,6 +119,10 @@ def fcst(self):
             dep_dict = {'type': 'task', 'name': f'wave_init'}
             dependencies.append(rocoto.add_dependency(dep_dict))
 
+        if self.app_config.do_aero:
+            dep_dict = {'type': 'task', 'name': f'prep_emissions'}
+            dependencies.append(rocoto.add_dependency(dep_dict))
+
         dependencies = rocoto.create_dependency(dep_condition='and', dep=dependencies)
 
         resources = self.get_resource('fcst')
@@ -125,6 +150,10 @@ def efcs(self):
             dep_dict = {'type': 'task', 'name': f'wave_init'}
             dependencies.append(rocoto.add_dependency(dep_dict))
 
+        if self.app_config.do_aero:
+            dep_dict = {'type': 'task', 'name': f'prep_emissions'}
+            dependencies.append(rocoto.add_dependency(dep_dict))
+
         dependencies = rocoto.create_dependency(dep_condition='and', dep=dependencies)
 
         efcsenvars = self.envars.copy()