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Title: Data Assimilation in the ADAPT Photospheric Flux Transport Model

Journal Article · · Solar Physics
 [1];  [1];  [2];  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. AFRL, Albuquerque, NM (United States)
+ Show Author Affiliations

Global maps of the solar photospheric magnetic flux are fundamental drivers for simulations of the corona and solar wind and therefore are important predictors of geoeffective events. However, observations of the solar photosphere are only made intermittently over approximately half of the solar surface. The Air Force Data Assimilative Photospheric Flux Transport (ADAPT) model uses localized ensemble Kalman filtering techniques to adjust a set of photospheric simulations to agree with the available observations. At the same time, this information is propagated to areas of the simulation that have not been observed. ADAPT implements a local ensemble transform Kalman filter (LETKF) to accomplish data assimilation, allowing the covariance structure of the flux-transport model to influence assimilation of photosphere observations while eliminating spurious correlations between ensemble members arising from a limited ensemble size. We give a detailed account of the implementation of the LETKF into ADAPT. Advantages of the LETKF scheme over previously implemented assimilation methods are highlighted.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-06NA25396
OSTI ID:
1215514
Report Number(s):
LA-UR-14-27938; PII: 666
Journal Information:
Solar Physics, Vol. 290, Issue 4; ISSN 0038-0938
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 105 works
Citation information provided by
Web of Science

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Cited By (26)

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Theoretical basis for operational ensemble forecasting of coronal mass ejections: OPERATIONAL ENSEMBLE FORECASTING OF CMES journal October 2015
Advancing parabolic operators in thermodynamic MHD models: Explicit super time-stepping versus implicit schemes with Krylov solvers journal May 2017
The Heliospheric Current Sheet in the Inner Heliosphere Observed by the Parker Solar Probe journal February 2020
Reconstructing Coronal Hole Areas With EUHFORIA and Adapted WSA Model: Optimizing the Model Parameters journal November 2019
Data Assimilation Approach for Forecast of Solar Activity Cycles journal October 2016
Validation of the Alfvén Wave Solar Atmosphere Model (AWSoM) with Observations from the Low Corona to 1 au journal December 2019
Estimating Total Open Heliospheric Magnetic Flux journal February 2019
The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations journal January 2018
Predicting the corona for the 21 August 2017 total solar eclipse journal August 2018
Data-driven Modeling of the Solar Corona by a New Three-dimensional Path-conservative Osher–Solomon MHD Model journal November 2017
The Slowly Varying Corona. II. The Components of F 10.7 and Their Use in EUV Proxies journal October 2019
Phase Speed of Magnetized Rossby Waves that Cause Solar Seasons journal August 2018
Data-driven modeling of the solar wind from 1  R s to 1 AU: DATA-DRIVEN SOLAR WIND MODELING journal December 2015
Role of Interaction between Magnetic Rossby Waves and Tachocline Differential Rotation in Producing Solar Seasons journal February 2018
Assessing the Quality of Models of the Ambient Solar Wind journal November 2018
Advances in mean-field dynamo theory and applications to astrophysical turbulence text January 2018
Predictions for the First Parker Solar Probe Encounter text January 2019
Reconstructing coronal hole areas with EUHFORIA and adapted WSA model: optimising the model parameters text January 2019
Application Usability Levels: A Framework for Tracking Project Product Progress preprint January 2019
Validation of the Alfvén Wave Solar atmosphere Model (AWSoM) with Observations from the Low Corona to 1 AU text January 2019
Predicting the Solar Wind at Parker Solar Probe Using an Empirically Driven MHD Model text January 2019
Climate, weather, space weather: model development in an operational context preprint January 2018

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Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
97 MATHEMATICS AND COMPUTING
Solar magnetic fields
photosphere
data assimilation