A5006788786- Climate variability and models
- Hydrology and Drought Analysis
- Tropical and Extratropical Cyclones Research
- Meteorological Phenomena and Simulations
- Climate change impacts on agriculture
- Flood Risk Assessment and Management
- Precipitation Measurement and Analysis
- Hydrology and Watershed Management Studies
- Ocean Waves and Remote Sensing
- Genetic diversity and population structure
- Genomics and Phylogenetic Studies
- Advanced Numerical Analysis Techniques
- Energy Load and Power Forecasting
- Computational Geometry and Mesh Generation
- Advanced Numerical Methods in Computational Mathematics
- Advanced Research in Science and Engineering
- Yersinia bacterium, plague, ectoparasites research
- Hybrid Renewable Energy Systems
- Salmonella and Campylobacter epidemiology
- Spatial and Panel Data Analysis
- Vehicle Dynamics and Control Systems
- Landslides and related hazards
- Rice Cultivation and Yield Improvement
- Fluid Dynamics Simulations and Interactions
- Climate Change, Adaptation, Migration
Beijing Normal University
2012-2024
Chinese Academy of Medical Sciences & Peking Union Medical College
2024
Chinese Academy of Sciences
2012-2023
Institut Pasteur of Shanghai
2023
George Mason University
1998-2022
Chinese Academy of Meteorological Sciences
2020
University of Hawaiʻi at Mānoa
2020
China Meteorological Administration
2020
University of Chinese Academy of Sciences
2020
Pacific International Center for High Technology Research
2020
We consider the problem of simulating sequences daily rainfall at a network sites in such way as to reproduce variety properties realistically over range spatial scales. The interest will vary between applications but typically include some measures “extreme” addition means, variances, proportions wet days, and autocorrelation structure. Our approach is fit generalized linear model (GLM) rain gauge data and, with appropriate incorporation intersite dependence structure, use GLM generate...
Abstract The increase in intense tropical cyclone (TC) activity across the western North Pacific (WNP) has often been attributed to a warming ocean. However, it is essential recognize that WNP region already boasts high temperatures, and marginal oceanic warmth due global does not exert significant impact on potential for TCs intensify. Here we report weakened vertical wind shear primary driver behind escalating trend TC intensity within summer monsoon trough of WNP, while local ocean...
Abstract In this study, based on the 6-hourly tropical cyclone (TC) best track data and ERA-Interim reanalysis data, statistical analyses as well a machine learning approach, XGBoost, are used to identify quantify factors that affect overwater weakening rate (WR) of TCs over western North Pacific (WNP) during 1980–2017. Statistical show TC rapid events usually occur when intense cross regions with sharp decrease in sea surface temperature (DSST) relatively faster eastward or northward...
A wavelet analysis is conducted to investigate daily variability (DV, timescales of less than 3 days), weekly (weather) (WV, 5 days up 2 months), and seasonal (SV, 8 17 months) in five temperature series from Europe China two westerly indices for the European/North Atlantic sector back 18th century. DV exhibits local features so that it sensitive any inhomogeneity each series. Analysis shows potential further homogenization data suggests present study, are only truly homogeneous 19th WV...
Abstract Contributions of atmospheric factors to the variability calculated theoretical maximum potential intensity (MPI) tropical cyclones (TCs) over North Atlantic are explored using 6‐hourly reanalysis and TC best track data from 1980 2015. The results show that for a given sea surface temperature (SST), MPI between medians top 10% bottom samples can vary by as large 10–15 m/s, which accounts 20–25% median MPI. It is shown drier (moister) colder (warmer) environment favors higher (lower)...
Abstract Daily rainfall sequences in the UK need careful quality control before use. This issue is discussed using data from two rain gauge networks. In particular, changes recording resolution or inconsistencies between different types of device may result biases, for which allowance should be made when these are used modelling. Model fitting shown to an effective way investigating unexplained spatial temporal inconsistencies. Generalized linear models fitted Blackwater catchment illustrate...
The Expert Team on Climate Change Detection and Indices (ETCCDI) proposed a set of 27 core indices, describing extreme weather climate events based daily temperature precipitation data. There are six percentile‐based indices: four exceedance rates (ERs) (TN10p, TN90p, TX10p TX90p) two durations (cold spell duration [CSDI] warm [WSDI]), derived by using percentiles for calendar days during the base period 1961–1990 as thresholds. widely used empirical quantile (percentile) estimator or its...
ABSTRACT Non‐stationary modelling of climate extremes has attracted significant attention in recent years. Generalized extreme value ( GEV ) distribution is the standard approach for block extremes. The non‐stationary form with location and scale parameters linearly regressing to time been widely used single‐site series In present paper, such a model extended be geoadditive regional nonparametric spatially varying temporal effects. implemented through Bayesian hierarchical applied annual...
A lithium-ion battery simulation model is developed for a fully coupled thermal–electrical–mechanical analysis. The calibrated with the hemispherical punch test its mechanical response and an external short-circuit electrical property. Realistic physical property representative geometry are used to each component. Randles circuit represent electric of battery. piecewise linear plasticity applied deformation failure cell material. result suggests that most heat generated at layer cathode...
Abstract A surface representation for computational fluid dynamics (CFD) shape design problems is presented. The based on the solution of a simplified pseudo‐shell problem to be optimized. stabilized finite element formulation used perform this step. methodology has advantage being completely independent CAD representation. Moreover, user does not have predefine any set functions parameterize surface. scheme uses reasonable discretization automatically build deformation modes, by using...
Abstract A multivariate functional principal component analysis approach to the full‐track simulation of tropical cyclones (TCs) is developed for risk assessment. Elemental variables TC along track necessary assessment, such as center coordinates, maximum wind speed, minimum central pressure and ordinal dates, can be simulated simultaneously at one go, using solely best‐track data with no supplemented from any other sources. The model optimally determined by means ladle estimator. occurrence...
Objective: To characterize the prevalence and genomic epidemiology of Vibrio parahaemolyticus from acute diarrheal patients in Shenzhen City 2013 to 2021. Methods: Based on Infectious Diarrhea Surveillance System, were actively monitored sentinel hospitals Whole-genome sequencing (WGS) isolates was performed, population structure, serotypes, virulence genes multilocus sequence typing analyzed. Outbreak clusters 2019 2021 explored based single-nucleotide polymorphism analysis. Results: A...
Abstract Using the 1980–2017 6‐hourly best‐track tropical cyclone data and global reanalysis data, we studied interbasin differences in median variability of maximum potential intensity (MPI) as a function sea surface temperature (SST) North Atlantic (NA), eastern Pacific (ENP), western (WNP), Indian Ocean (NI). Results show that MPI increases by 4.8, 7.7, 6.4, 4.4 m s −1 per degree increase SST NA, ENP, WNP, NI, respectively. The is largest NI at between 27 °C 28.5 ENP above °C, while...
A semi-parametric regression approach to quantile estimation for daily temperature data is proposed, in which both the biases and inhomogeneity are negligible, applied calculation of six percentile-based Expert Team on Climate Change Detection Indices (ETCCDI) extremes indices. Comparisons results with those from CLIMDEX datasets show that three warmth indices latter probably biased such their linear trends under RCP4.5 scenario seem be overestimated. In order avoid drawing misleading...
C. Yang1,2 and J. Xu31CAMS & China Re CRM · Joint Open Lab on Meteorological Risk Insurance, Beijing, China.2Faculty of Geographical Science, Beijing Normal University, China.3Qingdao Institute Marine Meteorology, Chinese Academy Sciences, China.Corresponding author: Yang (chi@bnu.edu.cn), Xu (xujing@cma.gov.cn)Key Points:A modified Rankine vortex model with four free parameters is adopted to reconstruct wind fields along the tropical cyclone tracksA Bayesian hierarchical a latent neural...