Hongze Leng
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View article: Dynamics, chemistry, and modeling studies in the aviation and aerospace transition zone
Dynamics, chemistry, and modeling studies in the aviation and aerospace transition zone Open
In this review, the concept of the aviation and aerospace transition zone (AATZ), that is, the area between the highest altitude of aviation vehicles and the lowest altitude of space vehicles, is introduced. It is 50-150 km away from the E…
View article: Physics field super-resolution reconstruction via enhanced diffusion model and fourier neural operator
Physics field super-resolution reconstruction via enhanced diffusion model and fourier neural operator Open
View article: An Adaptive Variance Adjustment Strategy for a Static Background Error Covariance Matrix—Part I: Verification in the Lorenz-96 Model
An Adaptive Variance Adjustment Strategy for a Static Background Error Covariance Matrix—Part I: Verification in the Lorenz-96 Model Open
Accurate initial conditions are crucial for improving numerical weather prediction (NWP). Variational data assimilation relies on a static background error covariance matrix (B), yet its variance estimation is often inaccurate, affecting a…
View article: Precipitation nowcasting diffusion model based on turbulence theory and multi-source data
Precipitation nowcasting diffusion model based on turbulence theory and multi-source data Open
Precipitation nowcasting is a long-standing challenge due to the inherent unpredictability, which often lead to significant risks and damage. While traditional approaches focus on modeling the nonlinear relationship between initial precipi…
View article: Major Advances in Aerospace Transition Zone Atmospheric Dynamics Research
Major Advances in Aerospace Transition Zone Atmospheric Dynamics Research Open
View article: Exploration of Deep-Learning-Based Error-Correction Methods for Meteorological Remote-Sensing Data: A Case Study of Atmospheric Motion Vectors
Exploration of Deep-Learning-Based Error-Correction Methods for Meteorological Remote-Sensing Data: A Case Study of Atmospheric Motion Vectors Open
Meteorological satellite remote sensing is important for numerical weather forecasts, but its accuracy is affected by many things during observation and retrieval, showing that it can be improved. As a standard way to measure wind from spa…
View article: An adaptive variance adjusting strategy for the climatological background error covariance matrix based on deep reinforcement learning
An adaptive variance adjusting strategy for the climatological background error covariance matrix based on deep reinforcement learning Open
Precision in the initial state is pivotal for the prediction accuracy of numerical weather prediction models. A mature method for providing the initial state, variational data assimilation (VarDA) relies notably on a climatological backgro…
View article: Generalized variational principles for the modified Benjamin-Bona-Mahony equation in the fractal space
Generalized variational principles for the modified Benjamin-Bona-Mahony equation in the fractal space Open
Because variational principles are very important for some methods to get the numerical or exact solutions, it is very important to seek explicit variational formulations for the non-linear PDE. At first, this paper describes the modified …
View article: Striation-Based Beamforming with Two-Dimensional Filtering for Suppressing Tonal Interference
Striation-Based Beamforming with Two-Dimensional Filtering for Suppressing Tonal Interference Open
Based on the interference spectrogram in the element–frequency domain using the data measured by the horizontal linear array, the source range can be estimated through the striation-based beamforming (SBF) method and its variants. Estimati…
View article: Comparison of Machine Learning Approaches for Reconstructing Sea Subsurface Salinity Using Synthetic Data
Comparison of Machine Learning Approaches for Reconstructing Sea Subsurface Salinity Using Synthetic Data Open
There is a growing interest in using sparse in situ salinity data to reconstruct high-resolution three-dimensional subsurface salinity with global coverage. However, in areas with no observations, there is a lack of observation data for co…
View article: An Improved Sea Spray-Induced Heat Flux Algorithm and Its Application in the Case Study of Typhoon Mangkhut (2018)
An Improved Sea Spray-Induced Heat Flux Algorithm and Its Application in the Case Study of Typhoon Mangkhut (2018) Open
The prediction of tropical cyclone (TC) intensity has been a lasting challenge. Numerical models often underestimate the intensity of strong TCs. Accurately describing the air–sea heat flux is essential for improving the simulation of TCs.…
View article: A Hybrid Method Using HAVOK Analysis and Machine Learning for Predicting Chaotic Time Series
A Hybrid Method Using HAVOK Analysis and Machine Learning for Predicting Chaotic Time Series Open
The prediction of chaotic time series systems has remained a challenging problem in recent decades. A hybrid method using Hankel Alternative View Of Koopman (HAVOK) analysis and machine learning (HAVOK-ML) is developed to predict chaotic t…
View article: Reconstructed Interpolating Differential Operator Method with Arbitrary Order of Accuracy for the Hyperbolic Equation
Reconstructed Interpolating Differential Operator Method with Arbitrary Order of Accuracy for the Hyperbolic Equation Open
We propose a family of multi-moment methods with arbitrary orders of accuracy for the hyperbolic equation via the reconstructed interpolating differential operator (RDO) approach. Reconstruction up to arbitrary order can be achieved on a s…
View article: Alternating Polynomial Reconstruction Method for Hyperbolic Conservation Laws
Alternating Polynomial Reconstruction Method for Hyperbolic Conservation Laws Open
We propose a new multi-moment numerical solver for hyperbolic conservation laws by using the alternating polynomial reconstruction approach. Unlike existing multi-moment schemes, our approach updates model variables by implementing two pol…
View article: Impacts of Air-Sea Energy Transfer on Typhoon Modelling
Impacts of Air-Sea Energy Transfer on Typhoon Modelling Open
The Coupled Ocean-Atmosphere-Wave-Sediment Transport model has been used to simulate Super Typhoon Yutu (2018). The impacts of four momentum transfer parameterization schemes (COARE, TY, OT, and DN) and three heat transfer parameterization…
View article: A Novel Sea Surface Roughness Parameterization Based on Wave State and Sea Foam
A Novel Sea Surface Roughness Parameterization Based on Wave State and Sea Foam Open
A wave state related sea surface roughness parameterization scheme that takes into account the impact of sea foam is proposed in this study. Using eight observational datasets, the performances of two most widely used wave state related pa…
View article: The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation
The Impact of Length-Scale Variation When Diagnosing the Standard Deviations of Background Error in a 4D-Var System and Filtering Method Investigation Open
The four-dimensional variational data assimilation (4D-Var) method has been widely employed as an operational scheme in mainstream numerical weather prediction (NWP) centers. In addition to the ensemble data assimilation method, the random…
View article: Potential Uncertainties in the Analysis of Low-Wavenumber Asymmetries Caused by Aliasing Center in Tropical Cyclones
Potential Uncertainties in the Analysis of Low-Wavenumber Asymmetries Caused by Aliasing Center in Tropical Cyclones Open
Variations in both symmetric wind components and asymmetric wave amplitudes of a tropical cyclone depend on the location of its center. Because the radial structure of asymmetries is critical to the wave–mean interaction, this study, under…
View article: Numerical Solution of Fractional Differential Equations by Using Integration Operational Matrix of Fractional-Order Legendre Wavelets
Numerical Solution of Fractional Differential Equations by Using Integration Operational Matrix of Fractional-Order Legendre Wavelets Open
In this paper, a new general procedure of the integration operational matrix of fractional-order Legendre wavelets is presented and then used to obtain the numerical solution of fractional differential equations. The fractional derivative …