DOI: 10.1002/grl.50969
论文题名: Application of a new data operator-splitting data assimilation technique to the 3-D VERB diffusion code and CRRES measurements
作者: Shprits Y. ; Kellerman A. ; Kondrashov D. ; Subbotin D.
刊名: Geophysical Research Letters
ISSN: 0094-8508
EISSN: 1944-8239
出版年: 2013
卷: 40, 期: 19 起始页码: 4998
结束页码: 5002
语种: 英语
英文关键词: data assimilation
; modeling
; radiation belts
Scopus关键词: Data assimilation
; Data assimilation techniques
; Electron radiation belt
; Kalman filtering techniques
; Operator-splitting methods
; Phase space densities
; Relativistic electron
; Three-dimensional reconstruction
; Data processing
; Kalman filters
; Models
; Phase space methods
; Radiation belts
; Three dimensional
; accuracy assessment
; adiabatic process
; climate modeling
; data assimilation
; global perspective
; Kalman filter
; simulation
; three-dimensional modeling
英文摘要: In this study we present 3-D data assimilation using CRRES data and 3-D Versatile Electron Radiation Belt Model (VERB) using a newly developed operator-splitting method. Simulations with synthetic data show that the operator-splitting Kalman filtering technique proposed in this study can successfully reconstruct the underlying dynamic evolution of the radiation belts. The method is further verified by the comparison with the conventional Kalman filter. We applied the new approach to 3-D data assimilation of real data to globally reconstruct the dynamics of the radiation belts using pitch angle, energy, and L shell dependent CRRES observations. An L shell time cross section of the global data assimilation results for nearly equatorially mirroring particles and high and low values of the first adiabatic invariants clearly show the difference between the radial profiles of phase space density. At μ = 700 MeV/G cross section of the global reanalysis shows a clear peak in the phase space density, while at lower energy of 70 MeV/G the profiles are monotonic. Since the radial profiles are obtained from one global reanalysis, the differences in the profiles reflect the differences in the underlying physical processes responsible for the dynamic evolution of the radiation belt energetic and relativistic electrons. Key Points Operator-splitting 3-D reanalysis can accurately reconstruct PSD Profiles of PSD at lower energies are monotonic Three-dimensional reconstruction shows clear peaks in PSD MeV ©2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84884857766&doi=10.1002%2fgrl.50969&partnerID=40&md5=04948fa204497d2cc31037d8150809fe
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/5772
Appears in Collections: 气候减缓与适应
There are no files associated with this item.
作者单位: Department of Earth Atmospheric and Planetary Sciences, University of California Los Angeles, Box 951565, 405 Hilgard Ave., Los Angeles, CA 90095, United States
Recommended Citation:
Shprits Y.,Kellerman A.,Kondrashov D.,et al. Application of a new data operator-splitting data assimilation technique to the 3-D VERB diffusion code and CRRES measurements[J]. Geophysical Research Letters,2013-01-01,40(19).