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Lightning Data Assimilation Scheme in a 4DVAR System and Its Impact on Very Short-Term Convective Forecasting

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (2)

A proof-of-concept method for the assimilation of total lightning observations in the 4DVAR framework is proposed and implemented into the Variational......

Effect of a Low-Frequency Vortex on the Size of Typhoon Lan (2017)

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (2)

Typhoon Lan (2017) was one of the largest tropical cyclones (TC) in the western North Pacific Ocean (WNP), and it was developed in a low-frequency (10......

Use of Power Transform Mixing Ratios as Hydrometeor Control Variables for Direct Assimilation of Radar Reflectivity in GSI En3DVar and Tests with Five Convective Storm Cases

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (3)

When directly assimilating radar data within a variational framework using hydrometeor mixing ratios (q) as control variables (CVq), the gradient of t......

A New Algorithm with Square Conservative Exponential Integral for Transport Equation

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (1)

The square conservative exponential integral method (SCEIM) is proposed for transport problems on the sphere. The method is a combination of the squar......

Physics-Augmented Deep Learning to Improve Tropical Cyclone Intensity and Size Estimation from Satellite Imagery

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (7)

A deep learning-based method augmented by prior knowledge of tropical cyclones (TCs), called DeepTCNet, is introduced to estimate TC intensity and win......

Error Growth Dynamics within Convection-Allowing Ensemble Forecasts over Central US Regions for Days of Active Convection

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (4)

Error growth is investigated based on convection-allowing ensemble forecasts starting from 0000 UTC for 13 active convection events over central to ea......

A 7-Yr Climatology of the Initiation, Decay, and Morphology of Severe Convective Storms during the Warm Season over North China

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (8)

The present work established a 7-yr climatology of the initiation, decay, and morphology of severe convective storms (SCSs) during the warm seasons (M......

A Multiscale Analysis of a Nocturnal Extreme Rainfall Event of 14 July 2017 in Northeast China

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (1)

A multiscale observational analysis of a nocturnal extreme rainfall event that occurred at Changtu in Northeast China on 14 July 2017 is performed usi......

Validation of a Prototype Global 4D-Var Data Assimilation System for the MPAS-Atmosphere Model

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (8)

A four-dimensional variational (4D-Var) data assimilation (DA) system is developed for the global nonhydrostatic atmospheric dynamical core of the Mod......

Evaluation of Microphysics Schemes in Tropical Cyclones Using Polarimetric Radar Observations: Convective Precipitation in an Outer Rainband

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (4)

Cloud microphysics significantly impact tropical cyclone precipitation. A prior polarimetric radar observational study by the authors revealed the ice......

On the Localized Extreme Rainfall over the Great Bay Area in South China with Complex Topography and Strong UHI Effects

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (8)

In this study, high-resolution surface and radar observations are used to analyze 24 localized extreme hourly rainfall (EXHR; >60 mm h(-1)) events ......

Effect of Scale-Aware Planetary Boundary Layer Schemes on Tropical Cyclone Intensification and Structural Changes in the Gray Zone

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (7)

Horizontal grid spacings of numerical weather prediction models are rapidly approaching O(1) km and have become comparable with the dominant length sc......

A Numerical Study of Typhoon Megi (2010). Part II: Eyewall Evolution Crossing the Luzon Island

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (2)

Typhoon Megi (2010) experienced drastic eyewall structure changes when it crossed the Luzon Island and entered the South China Sea (SCS), including th......

Structure and Dynamics of Ensemble Correlations for Satellite All-Sky Observations in an FV3-Based Global-to-Regional Nested Convection-Permitting Ensemble Forecast of Hurricane Harvey

期刊: MONTHLY WEATHER REVIEW, 2021; 149 (7)

There are ongoing efforts to establish an ensemble data assimilation and prediction system for tropical cyclones based on the finite-volume cubed-sphe......

A Climatology and Extreme Value Analysis of Large Hail in China

期刊: MONTHLY WEATHER REVIEW, 2020; 148 (4)

Hail size records are analyzed at 2254 stations in China and a hail size climatology is developed based on gridded hail observations for the period 19......

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