Search Menu
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information
Search Scholarly Publications

Title: A global coupled ensemble data assimilation system using the Community Earth System Model and the Data Assimilation Research Testbed

Journal Article · · Quarterly Journal of the Royal Meteorological Society
DOI: https://doi.org/10.1002/qj.3308 · OSTI ID:1543483
 [1];  [1];  [1];  [2];  [1];  [1];  [1];  [1];  [1];  [1];  [3]
  1. National Center for Atmospheric Research (NCAR), Boulder, CO (United States)
  2. Cooperative Institute for Research in Environmental Sciences (CIRES), Boulder, CO (United States)
  3. External contractor to National Center for Atmospheric Research (NCAR), Boulder, CO (United States)
+ Show Author Affiliations

This paper presents a description of the CESM/DART ensemble coupled data assimilation (DA) system based on the Community Earth System Model (CESM) and the Data Assimilation Research Testbed (DART) assimilation software. The CESM/DART should be viewed as a flexible system to support the DA needs of the CESM research community and not as a static reanalysis product. In this implementation of the CESM/DART, conventional insitu observations of the ocean and atmosphere are assimilated into the respective component models of the CESM using a 30‐member ensemble adjustment Kalman filter (EAKF). CESM/DART is run in a “weakly coupled” configuration wherein observations native to each climate system component only directly impact the state vector for that component. Information is passed between components indirectly through the short‐term coupled model forecasts that provide the EAKF background ensemble. This system leverages previous ensemble DA development for the Community Atmosphere Model and Parallel Ocean Program models using the DART EAKF. The CESM/DART project is a step towards providing increasingly useful DA capabilities for the CESM research community. Results are presented for our prototype 12‐year reanalysis, run from 1970 to mid 1982. Multiple lines of evidence demonstrate that the system is capable of constraining the CESM coupled model to simulate the historical variability of the climate system in the well‐observed Northern Hemisphere. A collection of monthly average variables, climate mode indices, observation diagnostics and snapshots of synoptic weather in the ocean and atmosphere are compared to established datasets, showing especially good agreement in the Northern Hemisphere. A discussion of the CESM/DART as a modular, community facility and the benefits and challenges associated with this vision is also included.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); University Corporation for Atmospheric Research, Boulder, CO (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-05CH11231; FC02-97ER62402; DE‐AC02‐05CH11231
OSTI ID:
1543483
Alternate ID(s):
OSTI ID: 1487157
Journal Information:
Quarterly Journal of the Royal Meteorological Society, Vol. 144, Issue 717; ISSN 0035-9009
Publisher:
Royal Meteorological SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

References (75)

Ensemble-derived stationary and flow-dependent background-error covariances: Evaluation in a quasi-operational NWP setting journal April 2005
Improving Incremental Balance in the GSI 3DVAR Analysis System journal March 2009
The Hybrid Local Ensemble Transform Kalman Filter journal June 2014
The CCSM4 Ocean Component journal March 2012
Coupled Data Assimilation for Integrated Earth System Analysis and Prediction journal July 2017
A reformulation of the background error covariance in the ECMWF global data assimilation system journal March 1999
Distance-Dependent Filtering of Background Error Covariance Estimates in an Ensemble Kalman Filter journal November 2001
Decadal Climate Prediction: An Update from the Trenches journal February 2014
Assimilation of MODIS snow cover through the Data Assimilation Research Testbed and the Community Land Model version 4: SNOW DATA ASSIMILATION journal June 2014
Adaptive Sampling with the Ensemble Transform Kalman Filter. Part I: Theoretical Aspects journal March 2001
The Gales of 2 January 1976 journal June 1976
Software for ensemble-based data assimilation systems—Implementation strategies and scalability journal June 2013
Upper Ocean Response to a Hurricane journal February 1981
An Overview of CMIP5 and the Experiment Design journal April 2012
A Study of Impacts of Coupled Model Initial Shocks and State–Parameter Optimization on Climate Predictions Using a Simple Pycnocline Prediction Model journal December 2011
Review of the Ensemble Kalman Filter for Atmospheric Data Assimilation journal December 2016
Construction of correlation functions in two and three dimensions journal January 1999
Improved Sea Ice Shortwave Radiation Physics in CCSM4: The Impact of Melt Ponds and Aerosols on Arctic Sea Ice journal March 2012
A Hybrid Ensemble Kalman Filter–3D Variational Analysis Scheme journal August 2000
Daily High-Resolution-Blended Analyses for Sea Surface Temperature journal November 2007
A New Globally Complete Monthly Historical Gridded Mean Sea Level Pressure Dataset (HadSLP2): 1850–2004 journal November 2006
The Bluelink ocean data assimilation system (BODAS) journal January 2008
The 10,240-member ensemble Kalman filtering with an intermediate AGCM: 10240-MEMBER ENKF WITH AN AGCM journal July 2014
A Local Least Squares Framework for Ensemble Filtering journal April 2003
Effects of ocean grid resolution on tropical cyclone-induced upper ocean responses using a global ocean general circulation model: RESOLUTION AFFECTS OCEAN RESPONSE TO TC journal November 2016
A coupled data assimilation system for climate reanalysis: Coupled Data Assimilation for Climate Reanalysis
  • Laloyaux, Patrick; Balmaseda, Magdalena; Dee, Dick
  • Quarterly Journal of the Royal Meteorological Society, Vol. 142, Issue 694 https://doi.org/10.1002/qj.2629
journal September 2015
The Community Earth System Model (CESM) Large Ensemble Project: A Community Resource for Studying Climate Change in the Presence of Internal Climate Variability journal August 2015
Data assimilation in weather forecasting: a case study in PDE-constrained optimization journal July 2008
Ensemble Square Root Filters* journal July 2003
Ensemble Optimal Interpolation: multivariate properties in the Gulf of Mexico journal January 2009
Estimation of high-dimensional prior and posterior covariance matrices in Kalman filter variants journal February 2007
Limited-memory preconditioners, with application to incremental four-dimensional variational data assimilation journal January 2008
An Ensemble Adjustment Kalman Filter for Data Assimilation journal December 2001
An Ensemble Approach for the Estimation of Observational Error Illustrated for a Nominal 1° Global Ocean Model journal May 2016
The Mean Climate of the Community Atmosphere Model (CAM4) in Forced SST and Fully Coupled Experiments journal July 2013
NCEP–DOE AMIP-II Reanalysis (R-2) journal November 2002
An Ensemble Adjustment Kalman Filter for the CCSM4 Ocean Component journal October 2013
Ocean Initialization for Seasonal Forecasts journal September 2009
The Community Earth System Model: A Framework for Collaborative Research journal September 2013
Evaluating Methods to Account for System Errors in Ensemble Data Assimilation journal September 2012
Assessing a New Coupled Data Assimilation System Based on the Met Office Coupled Atmosphere–Land–Ocean–Sea Ice Model journal November 2015
Sequential data assimilation with a nonlinear quasi-geostrophic model using Monte Carlo methods to forecast error statistics journal January 1994
Assimilating atmospheric observations into the ocean using strongly coupled ensemble data assimilation journal January 2016
The ERA-40 re-analysis journal October 2005
Atlantic Hurricane Season of 1980 journal July 1981
The evolution of the ECMWF hybrid data assimilation system: Evolution of ECMWF Hybrid Data Assimilation
  • Bonavita, Massimo; Hólm, Elias; Isaksen, Lars
  • Quarterly Journal of the Royal Meteorological Society, Vol. 142, Issue 694 https://doi.org/10.1002/qj.2652
journal September 2015
An assessment of oceanic variability for 1960–2010 from the GFDL ensemble coupled data assimilation journal June 2012
Reassessing biases and other uncertainties in sea surface temperature observations measured in situ since 1850: 2. Biases and homogenization journal January 2011
Multi-model seasonal forecast of Arctic sea-ice: forecast uncertainty at pan-Arctic and regional scales journal October 2016
A Decadal Prediction Case Study: Late Twentieth-Century North Atlantic Ocean Heat Content journal August 2012
Scalable Implementations of Ensemble Filter Algorithms for Data Assimilation journal August 2007
The North American Multimodel Ensemble: Phase-1 Seasonal-to-Interannual Prediction; Phase-2 toward Developing Intraseasonal Prediction journal April 2014
Experimental Tropical Cyclone Forecasts Using a Variable-Resolution Global Model journal October 2015
The Twentieth Century Reanalysis Project
  • Compo, G. P.; Whitaker, J. S.; Sardeshmukh, P. D.
  • Quarterly Journal of the Royal Meteorological Society, Vol. 137, Issue 654 https://doi.org/10.1002/qj.776
journal January 2011
An Improved Coupled Model for ENSO Prediction and Implications for Ocean Initialization. Part I: The Ocean Data Assimilation System journal April 1998
A Global Oceanic Data Assimilation System journal September 1989
DART/CAM: An Ensemble Data Assimilation System for CESM Atmospheric Models journal September 2012
The Data Assimilation Research Testbed: A Community Facility journal September 2009
The NCEP–NCAR 50–Year Reanalysis: Monthly Means CD–ROM and Documentation journal February 2001
An Adaptive Ensemble Kalman Filter journal January 2000
Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century journal January 2003
An evaluation of experimental decadal predictions using CCSM4 journal July 2014
The NCEP Climate Forecast System Reanalysis journal August 2010
ICOADS Release 2.5: extensions and enhancements to the surface marine meteorological archive journal March 2010
Updated high-resolution grids of monthly climatic observations - the CRU TS3.10 Dataset: UPDATED HIGH-RESOLUTION GRIDS OF MONTHLY CLIMATIC OBSERVATIONS journal May 2013
The new eddy-permitting ORAP5 ocean reanalysis: description, evaluation and uncertainties in climate signals journal June 2015
The NCEP/NCAR 40-Year Reanalysis Project journal March 1996
Parameterization improvements and functional and structural advances in Version 4 of the Community Land Model journal January 2011
Origin and Impact of Initialization Shocks in Coupled Atmosphere–Ocean Forecasts* journal November 2015
The JRA-55 Reanalysis: General Specifications and Basic Characteristics journal January 2015
Assimilation of surface velocity data into a primitive equation coastal ocean model journal January 2002
System Design and Evaluation of Coupled Ensemble Data Assimilation for Global Oceanic Climate Studies journal October 2007
A flexible I/O arbitration framework for netCDF-based big data processing workflows on high-end supercomputers: A Flexible I/O Arbitration Framework for netCDF based Big Data Processing journal May 2017
Spatially and temporally varying adaptive covariance inflation for ensemble filters journal January 2009
EN4: Quality controlled ocean temperature and salinity profiles and monthly objective analyses with uncertainty estimates: THE EN4 DATA SET journal December 2013

Cited By (2)

Impact of Snow Initialization in Subseasonal‐to‐Seasonal Winter Forecasts With the Norwegian Climate Prediction Model journal September 2019
Tropical climate variability in the Community Earth System Model: Data Assimilation Research Testbed journal December 2019

Figures / Tables (23)

Figure 1(p. 6)figure Figure 1
Figure 2(p. 8)figure Figure 2
Table 1(p. 9)table Table 1
Table 2(p. 10)table Table 2
Figure 3(p. 11)figure Figure 3
Figure 4(p. 13)figure Figure 4
Figure 5(p. 14)figure Figure 5
Figure 6(p. 15)figure Figure 6
Figure 7(p. 18)figure Figure 7
Figure 8(p. 18)figure Figure 8
Figure 10(p. 19)figure Figure 10
Figure 9(p. 19)figure Figure 9
Figure 11(p. 20)figure Figure 11
Figure 12(p. 21)figure Figure 12
Figure 13(p. 22)figure Figure 13
Figure 14(p. 23)figure Figure 14
Figure 15(p. 24)figure Figure 15
Figure 16(p. 25)figure Figure 16
Figure 17(p. 25)figure Figure 17
Figure 18(p. 26)figure Figure 18
Figure 19(p. 27)figure Figure 19
Figure 20(p. 28)figure Figure 20
Figure 21(p. 29)figure Figure 21

Similar Records

Toward a chemical reanalysis in a coupled chemistry-climate model: An evaluation of MOPITT CO assimilation and its impact on tropospheric composition
Journal Article · 2016 · Journal of Geophysical Research: Atmospheres · OSTI ID:1480703
+16 more
Global Temperature Responses to Large Tropical Volcanic Eruptions in Paleo Data Assimilation Products and Climate Model Simulations Over the Last Millennium
Journal Article · 2021 · Paleoceanography and Paleoclimatology · OSTI ID:1779928
+2 more
Collaborative Research: Advancing Arctic Climate Projection Capability at Seasonal to Decadal Scales (Final Technical Report)
Technical Report · 2020 · OSTI ID:1638942

Related Subjects

54 ENVIRONMENTAL SCIENCES
meteorology & atmospheric sciences
Community Earth System Model
coupled data assimilation
coupled reanalysis
Data Assimilation Research Testbed
ensemble assimilation
ensemble Kalman filter
modular data assimilation