样式: 排序: IF: - GO 导出 标记为已读
-
Optimized Vertical Layers for the Hybrid Terrain-Following Coordinate Minimizing Numerical Errors in a 2D Rising Bubble Experiment near Steep Terrain J. Meteorol. Res. (IF 3.2) Pub Date : 2024-01-09 Hao Yang, Yiyuan Li, Bin Wang
The basic terrain-following (BTF) coordinate simplifies the lower boundary conditions of a numerical model but leads to numerical error and instability on steep terrain. Hybrid terrain-following (HTF) coordinates with smooth slopes of vertical layers (slopeVL) generally overcome this difficulty. Therefore, the HTF coordinate becomes very desirable for atmospheric and oceanic numerical models. However
-
Calibration of Gridded Wind Speed Forecasts Based on Deep Learning J. Meteorol. Res. (IF 3.2) Pub Date : 2024-01-09 Xuan Yang, Kan Dai, Yuejian Zhu
The challenges of applying deep learning (DL) to correct deterministic numerical weather prediction (NWP) biases with non-Gaussian distributions are discussed in this paper. It is known that the DL UNet model is incapable of correcting the bias of strong winds with the traditional loss functions such as the MSE (mean square error), MAE (mean absolute error), and WMAE (weighted mean absolute error)
-
Analysis of Pressure Forcings for the Vertical Turbulent Fluxes in the Convective Boundary Layer at Gray Zone Resolutions J. Meteorol. Res. (IF 3.2) Pub Date : 2024-01-09 Yahua Wang, Xiaoping Cheng, Jianfang Fei, Bowen Zhou
At kilometer and sub-kilometer resolutions, known as the numerical gray zone for boundary layer turbulence, the atmospheric boundary layer turbulence becomes partially resolved and partially subgrid-scale (SGS) in a numerical model, thus requiring scale-adaptive turbulence schemes. Such schemes are often built by modifying the existing parameterizations, either the planetary boundary layer (PBL) schemes
-
Improving Wind Forecasts Using a Gale-Aware Deep Attention Network J. Meteorol. Res. (IF 3.2) Pub Date : 2024-01-09 Keran Chen, Yuan Zhou, Ping Wang, Pingping Wang, Xiaojun Yang, Nan Zhang, Di Wang
Numerical weather prediction of wind speed requires statistical postprocessing of systematic errors to obtain reliable and accurate forecasts. However, use of postprocessing models is often undesirable for extreme weather events such as gales. Here, we propose a postprocessing algorithm based on a gale-aware deep attention network to simultaneously improve wind speed forecasts and gale area warnings
-
Latitudinal and Seasonal Variations in Tropical Cyclone-Induced Ocean Surface Cooling in the Tropical Western North Pacific J. Meteorol. Res. (IF 3.2) Pub Date : 2024-01-09 Mengxi Jin, Ziyuan Zhao, Renguang Wu, Peijun Zhu
The passage of tropical cyclones induces ocean surface cooling through vertical mixing, upwelling, and surface heat loss. The dependence of tropical cyclone-induced ocean surface cooling on the intensity and translation speed of tropical cyclones has been documented in previous studies. The present study investigates the latitudinal and seasonal variations in tropical cyclone-induced ocean surface
-
Sensitivity of the Size of a TC to Sea Surface Temperatures in Its Outer Region J. Meteorol. Res. (IF 3.2) Pub Date : 2023-12-01
Abstract We investigated the sensitivity of the size of a tropical cyclone (TC) to warming or cooling sea surface temperatures (SST) in its outer region by simulating the SST beyond a radius of 200 km from the TC center. Sensitivity experiments showed that an increased SST outside the core region of the TC had a negative effect on its size. Warming in the outer region contributed to the local enhancement
-
Modulation of High-Latitude Tropical Cyclone Recurvature by Solar Radiation J. Meteorol. Res. (IF 3.2) Pub Date : 2023-12-01
Abstract In this study, idealized simulations are conducted to investigate potential influences of solar radiation on the tropical cyclone (TC) recurvature at higher latitudes. Results indicate that TC track is sensitive to the seasonal variation of radiative forcing at higher latitudes. In the absence of a background flow, TCs at higher latitudes tend to recurve (remain northwestward) in the cold
-
Operational Plan, Effect Verification, and Key Technical Settings for a Stadium-Scale Artificial Rain Reduction Experiment J. Meteorol. Res. (IF 3.2) Pub Date : 2023-11-08 Yuquan Zhou, Siyao Liu, Miao Cai, Junlin Long, Jia Wang
To explore the key technologies of artificial weather modification for specific targets (e.g., a stadium) and improve the efficiency of artificial rainfall modification for major events, this study conducts an artificial rainfall reduction experiment for the closing ceremony of Nanjing Youth Olympic Games on 28 August 2014. Satellite retrievals, radar observations, sounding data, and other sources
-
Disastrous Persistent Extreme Rainfall Events of the 2022 Pre-Flood Season in South China: Causes and Subseasonal Predictions J. Meteorol. Res. (IF 3.2) Pub Date : 2023-09-05 Jiehong Xie, Pang-Chi Hsu, Yamin Hu, Qiaomei Lin, Mengxi Ye
Two persistent extreme rainfall events (PEREs) with record-breaking amounts of rainfall and long duration caused disastrous impact during the 2022 pre-flood season in South China. Atmospheric intraseasonal variability played a key role in triggering and maintaining both PEREs, but its major impact on each event was associated with different modes. For the first PERE (10–15 May; PERE1), the tropical
-
Zonally Asymmetric Temperature Trends near the Northern Middle and High Latitude Stratopause during Winter J. Meteorol. Res. (IF 3.2) Pub Date : 2023-09-05 Tao Wang, Wenshou Tian, Ruhua Zhang, Jiali Luo, Wuhu Feng
The temperature trend near the stratopause is rarely evaluated owing to the limited long-term observations of global temperature. In this study, the spatial patterns of the temperature trends near the northern stratopause are investigated by using satellite and reanalysis datasets. Our analysis reveals a zonally asymmetric temperature trend pattern near the northern mid-to-high latitude stratopause
-
Unusual Evolution of the Multiple Eyewall Cycles in Super Typhoon Hinnamnor (2022) J. Meteorol. Res. (IF 3.2) Pub Date : 2023-09-05 Hui Wang, Yubin Yu, Dajun Zhao, Tzu-Hsiung Yen, Hongxiong Xu, Qian Wang, Zhiqiang Cao
Hinnamnor was the first super typhoon in the western North Pacific basin in 2022. It had several prominent characteristics, such as rapid intensification after its formation, three eyewall cycles, and a sudden recurvature of its track. Based on multi-source observational and reanalysis datasets, two secondary eyewall formation (SEF) cycles occurred during Super Typhoon Hinnamnor’s lifetime. The first
-
First Look of Surface Vegetation from the Advanced Geostationary Radiation Imager (AGRI) onboard Fengyun-4B J. Meteorol. Res. (IF 3.2) Pub Date : 2023-09-05 Shengqi Li, Xiuzhen Han, Yeping Zhang, Yachun Li
For many years, the status of surface vegetation has been monitored by using polar-orbiting satellite imagers such as Moderate Resolution Imaging Spectroradiometer (MODIS). However, limited availability of clear-sky samples makes the derived vegetation index dependent on multiple days of observations. High-frequency observations from the geostationary Fengyun (FY) satellites can significantly reduce
-
Shape Classification of Cloud Particles Recorded by the 2D-S Imaging Probe Using a Convolutional Neural Network J. Meteorol. Res. (IF 3.2) Pub Date : 2023-09-05 Rong Zhang, Haixia Xiao, Yang Gao, Haizhou Su, Dongnan Li, Lei Wei, Junxia Li, Hongyu Li
The airborne two-dimensional stereo (2D-S) optical array probe has been operating for more than 10 yr, accumulating a large amount of cloud particle image data. However, due to the lack of reliable and unbiased classification tools, our ability to extract meaningful morphological information related to cloud microphysical processes is limited. To solve this issue, we propose a novel classification
-
Effects of Large-Scale Climatic Oscillations on the Variability of the Indian Summer Monsoon Rainfall J. Meteorol. Res. (IF 3.2) Pub Date : 2023-07-17 Deepak Meena, K. Athira, Sarmistha Singh
In India, large-scale climatic oscillations have strong influences on the Indian summer monsoon rainfall (ISMR), which plays a crucial role in India’s agricultural production and economic growth. However, there are limited studies in India that explore the influences of decadal and multidecadal oscillations on the ISMR and associated El Niño–Southern Oscillation (ENSO). Therefore, in this study we
-
Relationships between Springtime Sea Surface Temperatures in Different Indian Ocean Domains and Various Asian Monsoons from Late Spring to the Following Summer J. Meteorol. Res. (IF 3.2) Pub Date : 2023-07-17 Kangtai Chen, Song Yang
We investigate the relative importance of spring sea surface temperatures (SSTs) in different Indian Ocean (IO) domains, especially the northern and southern IO, for the development and intensity of the Asian summer monsoon. By performing unsupervised neural network analysis, the self-organizing map, we extract distinct patterns of springtime IO SST. The results show that the uniform warming (cooling)
-
Verification of a Modified Nonhydrostatic Global Spectral Dynamical Core Based on the Dry-Mass Vertical Coordinate: Three-Dimensional Idealized Test Cases J. Meteorol. Res. (IF 3.2) Pub Date : 2023-07-17 Jun Peng, Jianping Wu, Xiangrong Yang, Jun Zhao, Weimin Zhang, Jinhui Yang, Fukang Yin
The newly developed nonhydrostatic (NH) global spectral dynamical core is evaluated by using three-dimensional (3D) benchmark tests with/without moisture. This new dynamical core differs from the original Aladin-NH like one in the combined use of a dry-mass vertical coordinate and a new temperature variable, and thus, it inherently conserves the dry air mass and includes the mass sink effect associated
-
Impact of the Return Flow on Heavy Pollution in Winter over the Beijing–Tianjin–Hebei Region J. Meteorol. Res. (IF 3.2) Pub Date : 2023-07-17 Mei Mei, Yihui Ding, Zunya Wang
In North China, the return flow (RF) refers to the airflow at the rear of an inshore high pressure, bringing southerly wind to the Beijing–Tianjin–Hebei (BTH) region when the high pressure pushes deeper from coast into the mainland. Many studies have pointed out the significant contribution of southerly anomalies to the transport and accumulation of pollutants in the BTH region. However, the relationship
-
Characteristics of Cloud Water Resource and Precipitation Efficiency of Hydrometeors over Northwest China J. Meteorol. Res. (IF 3.2) Pub Date : 2023-07-17 Zhanyu Yao, Lin An, Pei Zhang, Liangshu Gao, Shuo Jia, Weijian Wang, Wenhui Zhao
Understanding the characteristics of cloud water resource (CWR) and precipitation efficiency of hydrometeors (PEh) is imperative for the application of CWR in Northwest China. The atmospheric precipitable water (PW) in all four seasons and clouds and PEh in summer were studied with ERA-5 and CloudSat data in this region. The results show that topography, especially in the Tibetan Plateau, exerts significant
-
On the Nature of Caspian Clouds J. Meteorol. Res. (IF 3.2) Pub Date : 2023-05-03 Rashedi Shahnaz, Mohammadi Golamhasan, Jahanbakhshasl Saeed, Khorshiddoust Ali Mohammad, Sorooshian Armin, Dmitrovic Sanja, Tajbar Sapna
Caspian clouds (CCs) are formed between the southern coast of the Caspian Sea and the Alborz Mountains. The purpose of this study is to identify characteristics of CCs using aerosol, cloud, and meteorological data from Modern-Era Retrospective analysis for Research and Applications version 2 (MERRA-2), Moderate Resolution Imaging Spectroradiometer (MODIS), and ECMWF Reanalysis version 5 (ERA5) during
-
Impact of Antecedent Soil Moisture Anomalies over the Indo-China Peninsula on the Super Meiyu Event in 2020 J. Meteorol. Res. (IF 3.2) Pub Date : 2023-05-03 Yinshuo Dong, Haishan Chen, Xuan Dong
In the summer of 2020, a super Meiyu event occurred in the Yangtze River basin (YRB), causing enormous economic losses and human casualties. Recent studies have investigated the possible causes of this super Meiyu event from the perspective of anomalous atmospheric circulation activities and sea surface temperature (SST) anomalies; however, the influence of land surface processes has not garnered considerable
-
Convection Initiation of a Heavy Rainfall Event in the Coastal Metropolitan Region of Shanghai on the South Side of the Meiyu Front J. Meteorol. Res. (IF 3.2) Pub Date : 2023-05-03 Yanqing Gao, Xiaofeng Wang, Ying Xie, Wen Gu
Accurate prediction of the convection initiation (CI) in urban areas is still a challenge. A heavy rainfall event, missed by the 9-km regional operational modeling system, occurred in the coastal urban area of the Shanghai metropolitan region (SMR) in the late morning on 28 July 2020 on the warm side to the south of the Meiyu front. In this study, observational analyses and convection-permitting simulations
-
Recent Unusual Consecutive Spring Tropical Cyclones in North Atlantic and Winter Oceanic Precursor Signals J. Meteorol. Res. (IF 3.2) Pub Date : 2023-05-03 Hong Huang, Jeremy Cheuk-Hin Leung, Johnny C. L. Chan, Jimin Liu, Weihong Qian, Banglin Zhang
Although the North Atlantic (NA) hurricane season has been reported to start increasingly early, historical long-term changes in NA spring tropical cyclone (TC) activity have not been examined in previous studies. We find that spring TCs have become more frequent and intense, and they have more closely approached the US coastline over the past four decades, thus increasing the probability of landfall
-
Performance of a Global Spectral Model with Dry Air-Mass and Total Air-Mass Conserving Dynamical Cores: A Case Study of the July 2021 Henan Extreme Rainfall Event J. Meteorol. Res. (IF 3.2) Pub Date : 2023-03-27 Xiangrong Yang, Weimin Zhang, Jun Peng, Shaoying Li, Jianping Wu
This study investigates the effects of the assumption on the types of air-mass conservation prescribed in numerical models. First, predictions of the July 2021 (“21.7”) Henan extreme rainfall event from the Integrated Forecast System (IFS) at ECMWF were compared with those from the Yin-He Global Spectral Model (YHGSM), which is a global spectral model with total air-mass conservation (TMC) and dry
-
Observed Vertical Structure of Precipitation over the Southeastern Tibetan Plateau in Summer 2021 J. Meteorol. Res. (IF 3.2) Pub Date : 2023-03-27 Gaili Wang, Renran Zhou, Jingyi Zhang, Ran Li
Mêdog County, with its mountains and valleys, is located in the southeastern Tibetan Plateau (TP) and at the lower reaches of the Yarlung Zangbo River. This area has the highest annual rainfall amount over the TP, and in situ measurements are very scarce due to frequent debris flows and transportation difficulties. A monitoring campaign focused on cloud and precipitation observations was established
-
Thermal Wind Imbalance along the Curved Streamline of the Secondary Circulation in Tropical Cyclones J. Meteorol. Res. (IF 3.2) Pub Date : 2023-03-27 Yiwu Huang, Yihong Duan, Xinyan Lyu
The thermal wind balance in tropical cyclone (TC) eyewalls has been controversial for decades. This study reveals the relationship between the acceleration and curvature on the TC secondary circulation streamline, providing a way to judge thermal wind balance or imbalance in TCs from a simple but clear perspective. According to the relationship between the curvature and acceleration on the streamline
-
The Monsoon Low-Level Jet: Climatology and Impact on Monsoon Rainfall over the West Coast and Central Peninsular India J. Meteorol. Res. (IF 3.2) Pub Date : 2023-03-27 Rohit Thapliyal
The monsoon low-level jet (MLLJ) originates at Mascarene high and after traveling thousands of kilometers enters India from the western boundary causing deep convection, cloudiness, and rainfall. Although its core lies at 850 hPa, it has a large vertical extent; therefore, different meteorological parameters at different levels have a large influence on the Indian summer monsoon rainfall. This study
-
Surface Weather Parameters Forecasting Using Analog Ensemble Method over the Main Airports of Morocco J. Meteorol. Res. (IF 3.2) Pub Date : 2023-01-10 Badreddine Alaoui, Driss Bari, Yamna Ghabbar
Surface weather parameters detain high socioeconomic impact and strategic insights for all users, in all domains (aviation, marine traffic, agriculture, etc.). However, those parameters were mainly predicted by using deterministic numerical weather prediction (NWP) models that include a wealth of uncertainties. The purpose of this study is to contribute in improving low-cost computationally ensemble
-
Evaluation of the Madden-Julian Oscillation in Fengyun-3B Polar-Orbiting Satellite Reprocessed OLR Data J. Meteorol. Res. (IF 3.2) Pub Date : 2023-01-10 Hainan Gong, Wanchun Zhang, Ling Sun, Zizhen Dong, Peng Zhang, Lin Wang, Wen Chen, Renguang Wu
The present study compares the spatial and temporal characteristics of the Madden-Julian Oscillation (MJO) in Fengyun-3B (FY-3B) polar-orbiting satellite reprocessed outgoing longwave radiation (OLR) data and NOAA OLR data during 2011–2020. The spatial distributions of climatological mean and intraseasonal standard deviation of FY-3B OLR during boreal winter (November–April) and boreal summer (May–October)
-
Intensified Impact of the Equatorial QBO in August–September on the Northern Stratospheric Polar Vortex in December–January since the Late 1990s J. Meteorol. Res. (IF 3.2) Pub Date : 2022-11-08 Haibo Zhou, Ke Fan
This study reveals an intensified impact of the equatorial quasi-biennial oscillation (QBO) in August–September (QBO_AS) on the northern stratospheric polar vortex (SPV) in December–January (SPV_DJ) since the late 1990s. The unstable relationship may be related to the differences in the deep convection anomaly over the tropical western Pacific and Indian Oceans in October–November (ON) related to the
-
An Empirical Model of Tropical Cyclone Intensity Forecast in the Western North Pacific J. Meteorol. Res. (IF 3.2) Pub Date : 2022-11-08 Chen Ma, Tim Li
The relative impact of environmental parameters on tropical cyclone (TC) intensification rate (IR) was investigated through a box difference index (BDI) method, using TC best track data from Joint Typhoon Warning Center and environmental fields from the NCEP final analysis data over the western North Pacific (WNP) during 2000–2018. There are total 6307 TC samples with a 6-h interval, of which about
-
Role of Intraseasonal Oscillation in a Compound Drought and Heat Event over the Middle of the Yangtze River Basin during Midsummer 2018 J. Meteorol. Res. (IF 3.2) Pub Date : 2022-09-09 Chuhan Lu, Yichen Shen, Yonghua Li, Bo Xiang, Yujing Qin
In late July 2018, a compound drought and heat event (CDHE) occurred in the middle of the Yangtze River basin (MYRB) and caused great damage to the national economy. The CDHE over the MYRB has been documented to be linked with intraseasonal oscillations (ISOs) from different regions. However, specific roles of different ISOs on the development of the CDHE cannot be separated in the observational analysis
-
Decadal Change of the Linkage between Sea Ice over the Barents-Kara Seas in November-December and the Stratospheric Polar Vortex in Subsequent January J. Meteorol. Res. (IF 3.2) Pub Date : 2022-09-09 Haibo Zhou, Ke Fan
The linkage between the sea ice concentration (SIC) over the Barents-Kara Seas in November–December (SIC_BKS_ND) and the stratospheric polar vortex (SPV) in subsequent January (SPV_Jan) is investigated. It is found that SIC_BKS_ND is positively (negatively) correlated with SPV_Jan for the period 1979–1995 (1996–2009). Further analyses reveal that, during 1979–1995 (1996–2009), SIC_BKS_ND is relatively
-
Simulations of a Persistent Heat Wave Event in Missouri in Summer 2012 Using a High-Resolution WRF Model J. Meteorol. Res. (IF 3.2) Pub Date : 2022-09-09 Lili Zhu, Fengpeng Sun, Tim Li
An extreme and persistent heat wave event hit Missouri in summer 2012. Current operational forecast models failed to predict such an event at a long lead. The objective of the current study is to simulate this extreme event using a high-resolution Weather Research and Forecasting (WRF) model with eight combined physical (including longwave/shortwave radiation, microphysics, and planetary boundary layer)
-
FY-4A/GIIRS Temperature Validation in Winter and Application to Cold Wave Monitoring J. Meteorol. Res. (IF 3.2) Pub Date : 2022-09-09 Suling Ren, Jianying Jiang, Xiang Fang, Hui Liu, Zhiqiang Cao
In order to improve the operational application ability of the Fengyun-4A (FY-4A) new sounding dataset, in this paper, validation of the FY-4A Geosynchronous Interferometric Infrared Sounder (FY-4A/GIIRS) temperature was carried out using the balloon sounding temperature from meteorological sounding stations. More than 350,000 samples were obtained through time-space matching, and the results show
-
Cause-Effect Relationship between Meso-γ-Scale Rotation and Extreme Short-Term Precipitation: Observational Analyses at Minute and Sub-Kilometer Scales J. Meteorol. Res. (IF 3.2) Pub Date : 2022-09-09 Qiuyang Zhang, Yali Luo, Ying Tang, Xin Xu, Shuting Yu, Chong Wu
The cause-effect relationship between meso-γ-scale rotation and extreme short-term precipitation events remains elusive in mesoscale meteorological research. We aimed to elucidate this relationship by analyzing a rainstorm over the Pearl River Delta during the nocturnal hours of 15 May 2017 based on 6-min radar observations and 1-min rain gauge data. This rainstorm had a maximum hourly rainfall of
-
Forty Years of Air Temperature Change over Iran Reveals Linear and Nonlinear Warming J. Meteorol. Res. (IF 3.2) Pub Date : 2022-07-15 Majid Kazemzadeh, Zahra Noori, Sadegh Jamali, Abdulhakim M. Abdi
Spatiotemporal analysis of long-term changes in air temperature is of prime importance for climate change research and the development of effective mitigation and adaptation strategies. Although there are considerable studies on air temperature change across the globe, most of them have been on linear trends and time series analysis of nonlinear trends have not received enough attention. Here, spatiotemporal
-
On the Increased Precipitation Recycling by Large-Scale Irrigation over the Haihe Plain J. Meteorol. Res. (IF 3.2) Pub Date : 2022-07-15 Yunpeng Gui, Qingming Wang, Yong Zhao, Mengyang Ma, Haihong Li, Jiaqi Zhai, Enchong Li
Irrigation not only plays an important role in global food security, but it also affects aspects of the regional climate, including precipitation. In this study, we proposed a simple and convenient method to quantify the contribution of large-scale irrigation to precipitation by distinguishing the amount of evaporation generated by irrigation from local evaporation based on the precipitation recycling
-
Dynamic Trigger and Moisture Source of Two Typical Meiyu Front Rainstorms Associated with Eastward-Moving Cloud Clusters from the Tibetan Plateau J. Meteorol. Res. (IF 3.2) Pub Date : 2022-07-15 Hao Yang, Yi Deng, Chunguang Cui, Xiaofang Wang, Xiquan Dong
Eastward-moving cloud clusters from the Tibetan Plateau (TP) often trigger heavy rainfall events in the Yangtze River basin in summer. Forecasting these events in an operational environment remains a challenging task. Here, dynamical diagnosis and a Lagrangian trajectory model are used to analyze the background atmospheric circulation, maintenance mechanism, and moisture transport of two Meiyu front
-
Variations of Raindrop Size Distribution and Radar Retrieval in Outer Rainbands of Typhoon Mangkhut (2018) J. Meteorol. Res. (IF 3.2) Pub Date : 2022-07-15 Jingjing Lyu, Huiwen Xiao, Yuchun Du, Lina Sha, Yuqing Deng, Weikai Jia, Shengjie Niu, Yue Zhou, Guqian Pang
The evolution of the microphysical properties of raindrops from Typhoon Mangkhut’s outer rainbands as the storm made landfall in South China in September 2018 was investigated. The observations by three two-dimensional video disdrometers deployed in central Guangdong Province were analyzed concurrently. It was found that the radial distribution of the median volume diameter (D0) and normalized intercept
-
Reprocessing 12-yr Microwave Humidity Sounder Historical Data of Fengyun-3 Satellites J. Meteorol. Res. (IF 3.2) Pub Date : 2022-05-06 Yang Guo, Fangli Dou, Qiong Wu, Jieying He, Shengwei Zhang, Zhenzhan Wang, Songyan Gu, Peng Zhang
Atmospheric water vapor is an essential climate variable (ECV) with extensive spatial and temporal variations. Microwave humidity observations from meteorological satellites provide important information for climate system variables, including atmospheric water vapor and precipitable water, and assimilation in numerical weather prediction (NWP) and reanalysis. As one of the payloads onboard China’s
-
Upper-Ocean Lateral Heat Transports in the Niño3.4 Region and Their Connection with ENSO J. Meteorol. Res. (IF 3.2) Pub Date : 2022-05-06 He Zhao, Tongwen Wu, Laurent Z. X. Li, Fanghua Wu, Weihua Jie, Xiangwen Liu, Ronghua Zhang, Chengjun Xie
In the Niño3.4 region (tropical Pacific, 5°S–5°N, 170°–120°W), sea surface temperature (SST) changes are highly correlated with temperature variations in the upper 40-m layer. This study explores the upper-ocean heat budget in the Niño3.4 region using Ocean Reanalysis System 5 (ORAS5) monthly data from 1979 to 2018, with a focus on ocean heat transports at lateral boundaries in the top 40-m layer and
-
Comparison between the Roles of Low-Level Jets in Two Heavy Rainfall Events over South China J. Meteorol. Res. (IF 3.2) Pub Date : 2022-05-06 Xinyu Zhou, Zhengquan Cheng, Haowen Li, Dongming Hu
Two heavy rainfall events occurred over the Pearl River Delta during 20–22 May 2020: the first was a warm-sector event and the second a frontal event. Based on ERA5 reanalysis data and observations from wind profilers and Doppler weather radars, the structures and roles of low-level jets (LLJs) during these two heavy rainfall events were analyzed. The results show that: (1) South China was affected
-
Spatial and Temporal Validation of In-Situ and Satellite Weather Data for the South West Agricultural Region of Australia J. Meteorol. Res. (IF 3.2) Pub Date : 2022-03-15 Tristan Campbell, Peter Fearns
Seasonal variations in weather have significant impacts on crop yields. The accuracy of weather data is an important consideration for crop yield models. This study uses an independent in-situ weather station network to validate the accuracy of monthly temperature and precipitation data from the in-situ weather station network operated by the Bureau of Meteorology (BOM), interpolated gridded data from
-
Energetics of Boreal Wintertime Blocking Highs around the Ural Mountains J. Meteorol. Res. (IF 3.2) Pub Date : 2022-03-15 Ning Shi, Yicheng Wang, Suolangtajie
Based on the daily Japanese 55-yr reanalysis data, this study analyzes the maintenance mechanism for 53 boreal winter blocking highs around the Ural Mountains (UBHs) during 1958–2018 based on the atmospheric energy budget equations. After decomposing the circulation into background flow, low-frequency anomalies, and high-frequency eddies, it was found that the interaction between the background flow
-
Uncertainty in TC Maximum Intensity with Fixed Ratio of Surface Exchange Coefficients for Enthalpy and Momentum J. Meteorol. Res. (IF 3.2) Pub Date : 2022-03-15 Hexin Ye, Zhanhong Ma, Jianfang Fei
The classical tropical cyclone (TC) maximum intensity theory of Emanuel suggests that the maximum azimuthal wind of TC depends linearly on the ratio of surface exchange coefficients for enthalpy and momentum (Ck and Cd). In this study, a series of sensitivity experiments are conducted with the three-dimensional Cloud Model 1 (CM1), by fixing the ratio of Ck/Cd but varying the specific values of Ck
-
Global Rainstorm Disaster Risk Monitoring Based on Satellite Remote Sensing J. Meteorol. Res. (IF 3.2) Pub Date : 2022-03-15 Suling Ren, Xiuzhen Han, Jun Yang, Shihao Tang, Yang Zhang, Tianchan Shan, Cheng Liu
Methods of rainstorm disaster risk monitoring (RDRM) based on retrieved satellite rainfall data are studied. Due to significant regional differences, the global rainstorm disasters are not only affected by geography (such as topography and surface properties), but also by climate events. It is necessary to study rainstorm disaster-causing factors, hazard-formative environments, and hazard-affected
-
Potential Impact of Tonga Volcano Eruption on Global Mean Surface Air Temperature J. Meteorol. Res. (IF 3.2) Pub Date : 2022-03-15 Hua Zhang, Fei Wang, Jian Li, Yihong Duan, Congwen Zhu, Jingyi He
The undersea volcano, located in the South Pacific island nation of Tonga, violently erupted from 14 to 15 January 2022. The Tonga volcano eruption has aroused extensive discussion in the climate change field. Some climatologists believe that this event will cause little effect on global climate change while others insist that it will trigger “the year without a summer” as the Tambora eruption did
-
A Possible Dynamic Mechanism for Rapid Production of the Extreme Hourly Rainfall in Zhengzhou City on 20 July 2021 J. Meteorol. Res. (IF 3.2) Pub Date : 2022-02-01 Jinfang Yin,Haodong Gu,Xudong Liang,Miao Yu,Jisong Sun,Yanxin Xie,Feng Li,Chong Wu
-
Improving the Nowcasting of Strong Convection by Assimilating Both Wind and Reflectivity Observations of Phased Array Radar: A Case Study J. Meteorol. Res. (IF 3.2) Pub Date : 2022-02-01 Xiaoxia Lin,Yerong Feng,Daosheng Xu,Yuntao Jian,Fei Huang,Jincan Huang
With the advent of phased array radar (PAR) technology, it is possible to capture the development and evolution of convective systems in a much shorter time interval and with higher spatial resolution than traditional Doppler radar. Research on the assimilation of PAR observations in numerical weather prediction model is still very few in China. In this study, the impact of assimilating PAR data on
-
Study on the Clouds Detected by a Millimeter-Wave Cloud Radar over the Hinterland of the Taklimakan Desert in April–June 2018 J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Ming, Hu, Wang, Minzhong, Wei, Ming, Wang, Yinjun, Hou, Xiaochen, Gao, Mingliang
This study was the first to conduct high-resolution consecutive detection of clouds over the hinterland of the Taklimakan Desert (TD) from April to June 2018 based on a ground-based Ka-band millimeter-wave cloud radar (MMCR), with focus on the structure and evolution of the desert clouds. We calculated reflectivity factor (Z), cloud boundary, and liquid water content (LWC) by use of the MMCR power
-
Evaluation of FY-3/VIRR Sea Surface Temperature Data for Climate Applications J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Liu, Yunyun, Wang, Sujuan, Liu, Jian, Gong, Zhensong, Jia, Xiaolong
We evaluated the sea surface temperature (SST) products derived from the visible infrared radiometer on board the Fengyun-3 satellites (FY-3/VIRR) during 2016–2018 from the perspective of climate applications. The data had previously been reprocessed by the National Satellite Meteorological Center of China Meteorological Administration based on an updated SST retrieval algorithm. The overall consistency
-
Atmospheric Structure Observed over the Antarctic Plateau and Its Response to a Prominent Blocking High Event J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Zhu, Jinhuan, Zhou, Libo, Zou, Han, Li, Peng, Li, Fei, Ma, Shupo, Kong, Linlin
Studies on the atmospheric structure over the Antarctic Plateau are important for better understanding the weather and climate systems of polar regions. In the summer of 2017, an observational experiment was conducted at Dome-A, the highest station in Antarctica, with a total of 32 profiles obtained from global positioning system (GPS) radiosondes. Based on observational data, the atmospheric temperature
-
Effects of Dynamic Vegetation on Global Climate Simulation Using the NCEP GFS and SSiB4/TRIFFID J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Zhang, Zhengqiu, Xue, Yongkang, Zhai, Panmao, Deng, Huiping
Two global experiments were carried out to investigate the effects of dynamic vegetation processes on numerical climate simulations from 1948 to 2008. The NCEP Global Forecast System (GFS) was coupled with a biophysical model, the Simplified Simple Biosphere Model (SSiB) version 2 (GFS/SSiB2), and it was also coupled with a biophysical and dynamic vegetation model, SSiB version 4/Top-down Representation
-
Synthesis of True Color Images from the Fengyun Advanced Geostationary Radiation Imager J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Xie, Yuchen, Han, Xiuzhen, Zhu, Shanyou
The production of true color images requires observational data in the red, green, and blue (RGB) bands. The Advanced Geostationary Radiation Imager (AGRI) onboard China’s Fengyun-4 (FY-4) series of geostationary satellites only has blue and red bands, and we therefore have to synthesize a green band to produce RGB true color images. We used random forest regression and conditional generative adversarial
-
Evaluation of FY-3B Reprocessed OLR Data in the Asian—Australian Monsoon Region during 2011–2019: Comparison with NOAA OLR J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Liu, Lin, Zhang, Wanchun, Chen, Wen, Wu, Renguang, Wang, Lin
The present study evaluates spatial and temporal characteristics of the Fengyun-3B (FY-3B)’s outgoing longwave radiation (OLR) data based on NOAA OLR data and the GPCP (Global Precipitation Climatology Project) precipitation data over the Asian—Australian region during 2011–2019. In terms of climatological distribution patterns and interannual standard deviation, FY-3B OLR are quite consistent with
-
Evaluation of the ECMWF Precipitation Product over Various Regions of Iran J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Neshat, Aminreza, Shobeiri, Shahin, Sharafati, Ahmad
Easy access to accurate and reliable climate data is a crucial concern in hydrological modeling. In this regard, gridded climate data have recently been provided as an alternative to observational data. However, those data should be first evaluated and corrected to guarantee their validity and accuracy. This study offered a new approach to assess the ECMWF gridded precipitation data based on some indicators
-
A New Observation Operator for the Assimilation of Satellite-Derived Relative Humidity: Methodology and Experiments with Three Sea Fog Cases over the Yellow Sea J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Yang, Yue, Wang, Yongming, Gao, Shanhong, Yuan, Xiayu
Assimilation of satellite-derived relative humidity (Satellite-RH) is capable of improving sea fog forecasts by saturating the background in the observed foggy areas. Previous studies have achieved saturation by increasing the moisture only (Method-q). However, this method can lead to large wetting and warming biases within the marine atmospheric boundary layer (MABL). A new method using an RH observation
-
Numerical Investigation and Uncertainty Analysis of Eastern China’s Large-Scale Urbanization Effect on Regional Climate J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Quan, Jiping, Xue, Yongkang, Duan, Qingyun, Liu, Zhenxin, Oleson, Keith W., Liu, Ye
Eastern China has experienced rapid urbanization during the past four decades, and it is necessary to understand the impacts of the urbanization on the regional climate. Previous simulations with either regional climate models (RCMs) or general circulation models have produced inconsistent and statistically non-significant urbanization effects on precipitation during the East Asian summer monsoon.
-
Long-Term Consistent Recalibration of VIRR Solar Reflectance Data Record for Fengyun Polar-Orbiting Satellites J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Sun, Ling, Qiu, Hong, Wu, Ronghua, Wang, Jing, Zhang, Liyang, Zhang, Peng
The visible infrared radiometer (VIRR) is the first instrument with longest measurements equipped on the Fengyun (FY) polar-orbiting satellites. Through re-processing of the historic VIRR measurements, long-term (over 20 yr) global data can be integrated from multiple participating VIRRs on a consistent radiometric scale, which are valuable to climate and climate change studies. Due to lack of an onboard
-
Application of an Improved Analog-Based Heavy Precipitation Forecast Model to the Yangtze—Huai River Valley and Its Performance in June–July 2020 J. Meteorol. Res. (IF 3.2) Pub Date : 2022-01-11 Zhou, Baiquan, Zhai, Panmao, Niu, Ruoyun
Precipitation extremes, such as the record-breaking Meiyu characterized by frequent occurrences of rainstorms that resulted in severe flooding over the Yangtze—Huai River valley (YHRV) in June–July 2020, are always attracting considerable interest, highlighting the importance of improving the forecast accuracy at the medium-to-long range. To elevate the skill in forecasting heavy precipitation events