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Quarterly Journal of the Royal Meteorological Society, ISSN 0035-9009, 04/2008, Volume 134, Issue 633, pp. 1015 - 1025
Two approaches can be used to solve the variational data assimilation problem. The primal form corresponds to the 3D/4D‐Var used now in many operational NWP... 
PSAS | 3D‐Var | 4D‐Var | duality | 3D-Var | 4D-Var | Duality | SYSTEM | CANADA | STRATEGY | IMPLEMENTATION | 4DVAR | SCHEME | IMPACT | PALM | METEOROLOGY & ATMOSPHERIC SCIENCES | METEOROLOGICAL SERVICE | PRIMITIVE-EQUATION MODEL
Journal Article
11/2012, Volume 93, Issue 45, 1
The Amazon basin is an important sink of carbon dioxide, but it is also a substantial source of atmospheric methane. Tropical wetlands, including those in the... 
CH4 global inversions | BARCA | TM5‐4DVAR | Amazon | CH4 | airborne measurements | Methane | Greenhouse effect | Carbon dioxide | Amazon Basin | River basins | Atmospherics | Wetlands
Magazine Article
中国科学:地球科学英文版, ISSN 1674-7313, 2009, Issue 2, pp. 279 - 286
The proper orthogonal decomposition (POD) method is used to construct a set of basis functions for spanning the ensemble of data in a certain least squares... 
explicit | POD | data | method | 4DVAR | assimilation
Journal Article
SOLA, ISSN 1349-6476, 2013, Volume 9, Issue 1, pp. 134 - 138
In this study, the usefulness of the Quasi Static Variational Assimilation (QSVA) method in assimilating radar data for heavy rainfall cases, which are related... 
OPERATIONAL IMPLEMENTATION | SYSTEM | INTERPOLATION | SPACE | IMPACT | 4D-VAR | 3DVAR | MODEL | 4DVAR | METEOROLOGY & ATMOSPHERIC SCIENCES | VELOCITIES
Journal Article
Journal Article
Ocean Modelling, ISSN 1463-5003, 2008, Volume 23, Issue 3, pp. 130 - 145
We present the background, development, and preparation of a state-of-the-art 4D variational (4DVAR) data assimilation system in the Regional Ocean Modeling... 
Intra-Americas Sea | Gulf of Mexico | 4DVAR | ROMS | Predictability | Data assimilation | ALTIMETER DATA | METEOROLOGICAL OBSERVATIONS | GENERAL-CIRCULATION | predictability | MAPPING CAPABILITIES | GULF-OF-MEXICO | VARIABILITY | CARIBBEAN SEA | SURFACE TEMPERATURES | EDDY | OCEANOGRAPHY | VARIATIONAL ASSIMILATION | data assimilation | METEOROLOGY & ATMOSPHERIC SCIENCES
Journal Article
Journal of the Atmospheric Sciences, ISSN 0022-4928, 11/2007, Volume 64, Issue 11, pp. 3766 - 3784
Journal Article
Monthly Weather Review, ISSN 0027-0644, 04/2005, Volume 133, Issue 4, pp. 829 - 843
Journal Article
Atmosphere-Ocean, ISSN 0705-5900, 03/2010, Volume 48, Issue 1, pp. 10 - 25
A series of observing system experiments for the two-month period January-February 2007 was carried out to assess the impact of radiosonde and aircraft data... 
2-SEASON IMPACT | RAWINSONDE | CANADA | OCEANOGRAPHY | STORM RECONNAISSANCE PROGRAM | 4DVAR | SITU DATA | METEOROLOGY & ATMOSPHERIC SCIENCES | METEOROLOGICAL SERVICE
Journal Article
Quarterly Journal of the Royal Meteorological Society, ISSN 0035-9009, 01/2020, Volume 146, Issue 727, pp. 1026 - 1039
Current parallelization trends in computer technology facilitates development of the algorithms that retrieve linear approximations of the model operators and... 
variational data assimilation | ensemble methods | TANGENT LINEAR-MODEL | PART I | 4DVAR | METEOROLOGY & ATMOSPHERIC SCIENCES | Feasibility | Mathematical models | Algorithms | Numerical models | Numerical experiments | Equations
Journal Article
Meteorologische Zeitschrift, ISSN 0941-2948, 02/2013, Volume 22, Issue 1, pp. 35 - 48
In the ensemble-based four dimensional variational assimilation method (SVD-En4DVar), a singular value decomposition (SVD) technique is used to select the... 
4DVar | Enkf | Forecast sample | SVD technique | Update frequencey | Data assimilation | THEORETICAL ASPECTS | RADAR | EnKF | 4D-VAR | VARIATIONAL DATA ASSIMILATION | IMPLEMENTATION | KALMAN FILTER | FORMULATION | forecast sample | SCHEME | update frequencey | ECMWF | data assimilation | METEOROLOGY & ATMOSPHERIC SCIENCES | PROPER ORTHOGONAL DECOMPOSITION | svd technique | 4dvar | enkf
Journal Article
Atmospheric Pollution Research, ISSN 1309-1042, 10/2010, Volume 1, Issue 4, pp. 288 - 295
The paper presents a version of the 4DVar method, capable of optimizing diurnal time profiles of emissions. It is a generalization of existing inverse methods... 
Diurnal time profile of emission | Satellite observations | 4DVar | CMAQ adjoint | Inverse modeling | ENVIRONMENTAL SCIENCES
Journal Article
Journal of Geophysical Research: Atmospheres, ISSN 0148-0227, 10/2010, Volume 115, Issue D20, pp. 1F - n/a
Journal Article
Journal of Geophysical Research - Atmospheres, ISSN 0148-0227, 01/2009, Volume 114, Issue D2, pp. D02114 - n/a
Journal Article