DART: New Research Using Ensemble Data Assimilation in Geophysical Models

Abstract:

The Data Assimilation Research Testbed (DART) is a community facility
for ensemble data assimilation developed and supported by the National
Center for Atmospheric Research. DART provides a comprehensive suite
of software, documentation, and tutorials that can be used for ensemble
data assimilation research, operations, and education. Scientists and
software engineers at NCAR are available to support DART users who
want to use existing DART products or develop their own applications.
Current DART users range from university professors teaching data
assimilation, to individual graduate students working with simple
models, through national laboratories doing operational prediction
with large state-of-the-art models. DART runs efficiently on many
computational platforms ranging from laptops through thousands of
cores on the newest supercomputers.

This poster focuses on several recent research activities using DART
with geophysical models.

Using CAM/DART to understand whether OCO-2 Total Precipitable Water
observations can be useful in numerical weather prediction.
Impacts of the synergistic use of Infra-red CO retrievals (MOPITT, IASI)
in CAM-CHEM/DART assimilations.
Assimilation and Analysis of Observations of Amazonian Biomass Burning
Emissions by MOPITT (aerosol optical depth), MODIS (carbon monoxide)
and MISR (plume height).
Long term evaluation of the chemical response of MOPITT-CO assimilation
in CAM-CHEM/DART OSSEs for satellite planning and emission inversion
capabilities.
Improved forward observation operators for land models that have
multiple land use/land cover segments in a single grid cell,
Simulating mesoscale convective systems (MCSs) using a variable
resolution, unstructured grid in the Model for Prediction Across
Scales (MPAS) and DART.
The mesoscale WRF+DART system generated an ensemble of year-long,
real-time initializations of a convection allowing model over the
United States.
Constraining WACCM with observations in the tropical band (30S-30N) using
DART also constrains the polar stratosphere during the same winter.
Assimilation of MOPITT carbon monoxide Compact Phase Space Retrievals
(CPSR) in WRF-Chem/DART.

Future work:
DART interface to the CICE (CESM) sea ice model.
Fully coupled assimilations in CESM.