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Beryllium-7 and Lead-210 are Associated with an Increase in the Arctic Oscillation: Evidence from Atmospheric Aerosols in a Remote Tropical Region in East Asia Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-04-09 Xiaoxia Chen, Wuhui Lin, Xianwen He, Liangliang Feng, Kuo-Ying Wang
The Arctic Oscillation (AO) accounts for a large fraction of recent decadal climate trends in Northern Hemisphere (NH) high latitudes. In East Asia, an elevated AO index (AOI) was associated with warmer temperatures in middle- to high-latitude regions, colder temperatures over low-latitude regions, and elevated ozone intrusion from the stratosphere. Elevated beryllium-7 (7Be) is produced in the stratosphere
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Combined Dust Detection Algorithm for Asian Dust Events Over East Asia Using GK2A/AMI: a Case Study in October 2019 Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-04-07 Jae-Cheol Jang, Soobong Lee, Eun-Ha Sohn, Yoo-Jeong Noh, Steven D. Miller
A combined algorithm comprising multiple dust detection methods was developed using infrared (IR) channels onboard the GEOstationary Korea Multi-Purpose SATellite 2A equipped with the Advanced Meteorological Imager (GK2A/AMI). Six cloud tests using brightness temperature difference (BTD) were utilized to reduce errors caused by clouds. For detecting dust storms, three standard BTD tests (i.e., \({BT}_{12
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The Iris Effect: A Review Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-04-01 Richard S. Lindzen, Yong-Sang Choi
This study reviews the research of the past 20-years on the role of anvil cirrus in the Earth’s climate – research initiated by Lindzen et al. (Bull. Am. Meteor. Soc. 82:417-432, 2001). The original study suggested that the anvil cirrus would shrink with warming, which was estimated to induce longwave cooling for the Earth. This is referred to as the iris effect since the areal change hypothetically
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Annual and Monthly Trends of Cooling and Heating Degree-Days in Four Different Cities in Iraq as an Index of Energy Consumption Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-04-01 Khamis Daham Muslih
Heating and cooling degree days (HDDs/CDDs) method is commonly used to quantify the demand for energy needed for cooling and heating of buildings. Therefore, daily air temperature (minimum and maximum) from four stations in Iraq were analyzed to detect the annual and monthly heating and cooling degree-days trend over the period 1970–2014 using linear regression techniques. The results indicated that;
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Microphysical Features of Unprecedented Hailstorms Over Central Region of India During February – March 2014 Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-03-25 Manish Rameshchandra Ranalkar, H. S. Chaudhari, A. Hazra
The central region of India was battered by prolonged, widespread and severe hailstorm events during the period of 15 February 2014 to 15 March 2014. The events were unprecedented not only in terms of time of occurrence, duration and frequency of hailstorms but also size of hailstones. In the present study, we have proposed a hypothesis which governs the mechanism for the development of severe hailstorms
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Evaluation of Rainfall Forecasts by Three Mesoscale Models during the Mei-yu Season of 2008 in Taiwan. Part I: Subjective Comparison Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-03-05 Sahana Paul, Chung-Chieh Wang, Li-Shan Tseng, Dong-In Lee, Jing-Shan Hong, Tzay-Ming Leou
This study assesses relative merit of three mesoscale models – the Cloud-Resolving Storm Simulator (CReSS), the Central Weather Bureau (CWB) Weather Research and Forecasting (WRF) model, and the CWB Non-hydrostatic Forecast System (NFS) – that participated in the Southwest Monsoon Experiment (SoWMEX) in 2008. The Mei-yu quantitative precipitation forecasts (QPFs) in May–June of the three models are
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Spatiotemporal Analysis of Tropical Cyclone Landfalls in Northern Bay of Bengal, India and Bangladesh Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-03-05 Sunando Bandyopadhyay, Susmita Dasgupta, Zahirul Huque Khan, David Wheeler
In the Northern Bay of Bengal (NBoB), cyclonic storms (wind speed: ≥34 knots) inflict considerable losses in coastal Bangladesh and India. By building a georeferenced panel database of storm landfalls for this region, one can obtain spatial information on period-wise strike intensities. In this study, 168 cyclone strike locations along a 1259-km impact zone were analyzed for seven historical periods
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Improved Dust Detection over East Asia Using Geostationary Satellite Data Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-02-26 Yu-Rim Shin, Eun-Ha Sohn, Ki-Hong Park, Geun-Hyeok Ryu, Soobong Lee, Seon-Young Lee, Na-Yeon Park
This paper presents an improved algorithm, based on the D*-parameter, for dust detection over the East Asian region using brightness temperature differences (BTDs) between the infrared channels of the Advanced Himawari Imager (AHI) onboard Himawari-8. The developed algorithm defines a dust index in the form of the ratio of BTDs: BTD between the 10.4 μm and 12.4 μm channels (BTD10.4–12.4) to that between
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Comparison of Atmospheric Vertical Motion over China in ERA-Interim, JRA-55, and NCEP/NCAR Reanalysis Datasets Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-02-19 Jiayu Xu, Rongxiang Tian, Song Feng
Vertical motion is an important feature of the atmosphere, being closely linked to clouds and precipitation. Here, we present a comparison of the vertical velocity of air over China, with particular focus on the Tibetan Plateau, during the period 1981–2010 using three reanalysis datasets: ERA-Interim, JRA-55 and NCEP/NCAR. Analysis methods including empirical orthogonal functions analysis and correlation
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Historical and Projected Shift in Agro-Climatic Zones and Associated Variations of Daily Temperature and Precipitation Extremes using CORDEX-SA over Pakistan Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-02-15 Sajjad Haider, Kalim Ullah
Agro-climatic classification systems based on aridity help to distinguish various features of aridity in different agro-climatic regions around the world revealing potentially serious implications for water and agriculture sectors in light of climate change. This study probed historical and projected variations and shifts in agro-climatic zones associated with dispersion in Probability Density Functions
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Pandemic induced lockdown as a boon to the Environment: trends in air pollution concentration across India Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-02-01 Alok Sagar Gautam, Sanjeev Kumar, Sneha Gautam, Aryan Anand, Ranjit Kumar, Abhishek Joshi, Kuldeep Bauddh, Karan Singh
The present paper designed to understand the variations in the atmospheric pollutants viz. PM10, PM2.5, SO2, NO2, and CO during the COVID-19 pandemic over eight most polluted Indian cities (Mumbai, Delhi, Bangalore, Hyderabad, Lucknow, Chandigarh, Kolkata, and Ahmedabad). A significant reduction in the PM2.5 (63%), PM10 (56%), NO2 (50%), SO2 (9%), and CO (59%) were observed over Major Dhyan Chand Stadium
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Assessment of Ocean-Atmosphere Interactions for the Boreal Summer Intraseasonal Oscillations in CMIP5 Models over the Indian Monsoon Region Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-01-26 Gopinadh Konda, Naresh Krishna Vissa
The boreal summer intraseasonal oscillations (BSISO) are the prominent features of South Asian summer monsoon and mainly governed by the internal atmospheric dynamics and air-sea interactions. The present study aims to understand and evaluate the relationship between the convection and the associated air-sea interactions during the BSISO over the Indian monsoon region. To accomplish this, the present
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Climate Change Projection in the Twenty-First Century Simulated by NIMS-KMA CMIP6 Model Based on New GHGs Concentration Pathways Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-01-20 Hyun Min Sung, Jisun Kim, Sungbo Shim, Jeong-byn Seo, Sang-Hoon Kwon, Min-Ah Sun, Hyejin Moon, Jae-Hee Lee, Yoon-Jin Lim, Kyung-On Boo, Youngmi Kim, Johan Lee, Jiwoo Lee, Jun-su Kim, Charline Marzin, Young-Hwa Byun
The National Institute of Meteorological Sciences-Korea Meteorological Administration (NIMS-KMA) has participated in the Coupled Model Inter-comparison Project (CMIP) and provided long-term simulations using the coupled climate model. The NIMS-KMA produces new future projections using the ensemble mean of KMA Advanced Community Earth system model (K-ACE) and UK Earth System Model version1 (UKESM1)
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Changes in Dust Activity in Spring over East Asia under a Global Warming Scenario Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-01-20 Qi Zong, Rui Mao, Dao-Yi Gong, Chenglai Wu, Bing Pu, Xingya Feng, Yijie Sun
Dust activity not only influences human health through dust storms but also affects climate at local and regional scales through the direct effects of dust aerosols on both solar and longwave radiative heating. In this study, based on dust simulations from seven Coupled Model Intercomparison Project Phase 5 (CMIP5) models, the spatial and temporal changes in dust activity over East Asia under a Representative
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Planetary Boundary-Layer Structure at an Inland Urban Site under Sea Breeze Penetration Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2021-01-14 Young-Hee Lee, Moon-Soo Park, Yuna Choi
We evaluated the performance of the Weather Research and Forecasting Model in simulating the boundary-layer structure at an urban site in Seoul on two clear summer days against observations made using a ceilometer, a Doppler wind lidar, and a microwave radiometer. The planetary boundary-layer height (PBLH) was estimated from two different methods using observations: the ceilometer-based method (CBM)
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Comparison of Aerosol Properties in the Korean Peninsula Between AERONET Version 2 and 3 Data Set Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-10-19 Juhee Lee, Ja-Ho Koo, Sang-Min Kim, Taegyung Lee, Yun Gon Lee
To investigate the consistency and difference between AERONET version 2 and 3 data set in the Korean peninsula, we compared several aerosol optical properties for 12 Korean AERONET sites having at least 2-year measurement records. Generally, both version products have similar patterns, but we sometimes found a little regional difference. While the aerosol optical depth (AOD) is analogous between version
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Asymmetric Expansion of Summer Season on May and September in Korea Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-09-28 Chang-Hoi Ho, Chang-Kyun Park, Jeongmin Yun, Eun-Ju Lee, Jinwon Kim, Hee-Dong Yoo
Global warming and its associated changes in the timing of seasonal progression may produce substantial ripple effects on the regional climate and ecosystem. This study analyzes the surface air temperature recorded during the period 1919–2017 at seven stations in the Republic of Korea to investigate the long-term changes at the beginning and ending of the summer season and their relationship with the
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A Review on Estimation of Particulate Matter from Satellite-Based Aerosol Optical Depth: Data, Methods, and Challenges Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-09-04 Avinash Kumar Ranjan, Aditya Kumar Patra, A. K. Gorai
Detailed, reliable, and continuous monitoring of aerosol optical depth (AOD) is essential for air quality management and protection of human health. The satellite-based AOD datasets have been typically used in many studies for the estimation of particulate matter (PM2.5 and PM10) concentration in the tropospheric region. The prime focus of this study is to review the past studies to analyze the performance
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Characteristics of Raindrop Size Distribution in Seoul, South Korea According to Rain and Weather Types Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-08-28 Minchae Jwa, Han-Gyul Jin, Joohyun Lee, Sungju Moon, Jong-Jin Baik
The raindrop size distribution (RSD) is useful in understanding various precipitation-related processes. Here, we analyze disdrometer data collected in Seoul, South Korea from May 2018 to July 2019 to characterize the RSD according to rain and weather types. Rain types are categorized into stratiform, mixed, and convective rain, and weather types into the Changma front (type CF) and low-pressure system
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The Influence of Atmospheric Composition on Polarization in the GEMS Spectral Region Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-08-18 Haklim Choi, Kwang-Mog Lee, Jongjin Seo, Juyeon Bae
Sunlight is unpolarized when it enters the Earth’s atmosphere, and becomes polarized when interacting with atmospheric constituents. In the present study, the polarization state of ultraviolet-visible light in the spectral region (300–500 nm) of the Geostationary Environmental Monitoring Spectrometer (GEMS) is analyzed using the Vector Linearized Discrete Ordinate Radiative-Transfer (VLIDORT) model
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Comparison on Relationship between Western Pacific Subtropical High and Summer Precipitation over Dongting Lake Basin Based on Different Datasets Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-08-17 Jia Sun, Yimin Huang, Jun Han, Xingping Zhang
The Western Pacific Subtropical High (WPSH) is a principal component of the East Asian summer monsoon system. This study was to compare the relationship between the WPSH and summer precipitation in Dongting Lake basin (24°35′-30°27′N, 107°13′-114°18′E) based on different datasets by employing the multivariate regression analysis. The observed precipitation data was from China Meteorological Data (CMD)
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Diurnal Characteristics of Summer Precipitation Over Luzon Island, Philippines Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-08-12 Miguel Ricardo A. Hilario, Lyndon Mark Olaguera, Gemma Teresa Narisma, Jun Matsumoto
A network of 411 ground stations across Luzon Island, Philippines (12.5–20° N, 119–126.5° E) was used to characterize the diurnal cycles of summer precipitation, in terms of amount (PA), frequency (PF), and intensity (PI), during the southwest monsoon season (SWM; May–September) between 2011 and 2018. In addition to monsoon exposure, the effect of topography on the diurnal cycle of precipitation also
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Performance of 4D-Var Data Assimilation on Extreme Snowfall Forecasts over the Western Himalaya Using WRF Model Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-08-04 Narasimha Rao Nalamasu, M S Shekhar, GP Singh
The accurate predictions of extreme precipitation/snowfall events are very helpful in identifying the severe avalanche/landslide prone hazard areas in advance over high mountainous regions. The Weather Research and Forecasting model (WRF) version 3.9 has been used to investigate the performance of Four-Dimensional Variational data assimilation (4D-Var) on Three-Dimensional Variational data assimilation
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Weather Forecasting Using Ensemble of Spatial-Temporal Attention Network and Multi-Layer Perceptron Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-07-20 Yuanpeng Li, Junwei Lang, Lei Ji, Jiqin Zhong, Zaiwen Wang, Yang Guo, Sailing He
Weather forecasting is a challenging task, which is especially suited for artificial intelligence due to the large amount of data involved. This paper proposed an end-to-end hybrid regression model, called Ensemble of Spatial-Temporal Attention Network and Multi-Layer Perceptron (E-STAN-MLP), to forecast surface temperature, humidity, wind speed, and wind direction at 24 automatic weather stations
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Atmospheric Structure for Convective Development in the Events of Cloud Clusters over the Korean Peninsula Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-07-14 Tae-Young Lee, Uju Shin, Sang-Hun Park
This study examines atmospheric structures causing convective development in the events of cloud cluster (CC) over the Korean peninsula using the analysis and forecast data of National Centers for Environmental Prediction (NCEP) climate forecast system reanalysis (CFSR) and observation data. Two CC types—CCs associated with meso-α-scale lows (CCMLs) and mesoscale troughs (CCMTs)—were investigated.
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Variations in the Sensible Heating of Tibetan Plateau and Related Effects on Atmospheric Circulation Over South Asia Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-07-09 Li Liu, Wenjiang Zhang, Qifeng Lu, Genxu Wang
Thermal effects of the Tibetan Plateau (TP) play an important role in the atmospheric circulation over south Asia, which may have complex implications on the development of regional climate. In the study, we utilized 86 station-based observations (1980–2018) to investigate the variations in sensible heating on the plateau surface and their possible impacts on south Asian atmospheric circulation in
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Novel Thunderstorm Alert System (NOTHAS) Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-07-06 Vlado Spiridonov, Mladjen Curic, Nedim Sladic, Boro Jakimovski
A “Novel Thunderstorm Alert System” (NOTHAS) has been developed and extensively tested for forecast and warnings of mid-latitude and tropical convective events. The design of the system showed some potential advantages compared to earlier alert systems, mainly in reducing uncertainties in predictions by taking the given maximum hourly local-scale signal. It represents a dynamic tool which allows the
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Assessment Based on the Forecast Error for the Transition Period between the Jianghuai Meiyu and North China Rainy Seasons in 2016 Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-06-16 Jie Ma, Zhiping Zong, Li Jianping, Ruiqing Ding
During the transition period between the Jianghuai Meiyu and North China rainy seasons in 2016, there was a high-impact rainstorm event, connecting these two rainy seasons. However, both the short and medium range forecasts predicted a rain band that was too far south; this error can have serious implications for flood preparedness. This study discusses the causes of the forecast error using the ECMWF
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Parameter Sensitivity Analysis of the WRF-Hydro Modeling System for Streamflow Simulation: a Case Study in Semi-Humid and Semi-Arid Catchments of Northern China Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-05-25 Yuchen Liu, Jia Liu, Chuanzhe Li, Fuliang Yu, Wei Wang, Qingtai Qiu
The WRF model is nowadays the most widely applied mesoscale numerical weather prediction model. Its land-surface hydrological modeling module, WRF-Hydro, which is designed to facilitate the land-surface modeling being coupled with WRF, draws more and more attentions from both the meteorological and the hydrological community. In this study, four sensitive and principle parameters of WRF-Hydro are tested
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Nonstationary Distributional Changes of Annual Rainfall Indices in Taiwan Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-05-18 Jenq-Tzong Shiau, Pei-Syun Wu
The purpose of this study is to detect alterations of annual rainfall regime in terms of distributional changes of rainfall indices in Taiwan. A total of nine rainfall indices at eight stations with at least 72-year daily records are used to characterize annual rainfall regime. The generalized additive models for location, scale, and shape (GAMLSS) is adopted for dynamically detecting evolution of
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Ratio of PM 2.5 to PM 10 Mass Concentrations in Beijing and Relationships with Pollution from the North China Plain Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-05-11 Zhigang Li, Xin Yang, Chuanfeng Zhao, Tianyi Fan
Five years of PM2.5/PM10 ratios and their potential relationships with wind and relative humidity (RH) were analyzed for three areas in Beijing (northwestern mountainous area, urban area and southern suburbs), and these values were compared with those of five other cities, including Tianjin, Dalian, Hangzhou, Shanghai and Guangzhou. In the past five years, both PM2.5 and PM10 mass concentrations have
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A Comparative Study on the Offshore Intensification of Supertyphoon Rammasun (2014) and Typhoon Rumbia (2013): the Role of Summer Monsoon Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-05-08 Zhixiang Xiao, Cai Yao, Xiaoli Luo, Hongmei Sun
The offshore intensification mechanisms of Supertyphoon Rammasun (2014) and Typhoon Rumbia (2013) are analyzed and compared based on the best track typhoon data provided by the Shanghai Typhoon Institute of China Meteorological Administration (STI/CMA), ECMWF (CMA and JMA) objective (subjective) predicted typhoon track and intensity, and reanalysis data of the National Centers for Environmental Prediction/National
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Application of Bias- and Variance-Corrected SST on Wintertime Precipitation Simulation of Regional Climate Model over East Asian Region Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-05-08 Seok-Woo Shin, Tae-Jun Kim, Jin-Uk Kim, Tae-Young Goo, Young-Hwa Byun
In this study, the regional climate of East Asia was dynamically downscaled using Hadley Centre Global Environmental Model version 3-Regional Atmosphere (HadGEM3-RA) forced by the historical simulation data (1979–2005) of HadGEM2-AO produced by the National Institute of Meteorological Sciences (NIMS). To understand the impact of corrected SST on regional climate simulation, we integrated the experiments
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A Comparative Analysis of the Bay of Bengal Ocean State Using Standalone and Coupled Numerical Models Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-23 T. S Anandh, Bijan Kumar Das, J. Kuttippurath, Arun Chakraborty
This study evaluates the impact of coupled model in simulating the ocean state conditions of Bay of Bengal by comparing standalone and coupled numerical model simulations. The oceanic model is the Regional Ocean Modelling System (ROMS) and the coupled model comprises of ROMS and Weather Research and Forecast modelling system to simulate the oceanic and atmospheric state of the bay. The coupled model
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Cloud Impacts on Korea Shortwave Radiation Budget: Estimation from a Deterministic Model with Surface Measurements Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-23 Yun Gon Lee, Jaemin Kim, Yeonjin Jung, Hi-Ku Cho, Jhoon Kim, Ja-Ho Koo
We estimated the Korea Shortwave Radiation Budget (KSRB) providing new insights into the Korea climate system. Monthly averaged clear-sky, overcast-sky, and all-sky flux measurements with cloud amounts from 2000 to 2015 were used to assess the impacts of cloud on the KSRB. A deterministic model for shortwave radiation transfer was utilized with climatological data to compute the monthly mean of KSRB
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Spatial Interpolation of Gauge Measured Rainfall Using Compressed Sensing Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-23 Soorok Ryu, Joon Jin Song, Yongku Kim, Sung-Hwa Jung, Younghae Do, GyuWon Lee
In this work, we suggest new spatial precipitation interpolation schemes using compressed sensing (CS), which is a new framework for signal acquisition and smart sensor design. Using CS, the precipitation maps are recovered in high resolution by obtaining sparse coefficients of radial basis functions(RBFs). Two types of methods are designed according to the construction methods of CS matrix. In the
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Characteristics and Causes of Extreme Rainfall Induced by Binary Tropical Cyclones over China Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-21 Mingyang Wang, Fumin Ren, Yanjun Xie, Guoping Li, Ming-Jen Yang, Tian Feng
Binary tropical cyclones (BTC) often bring disastrous rainfall to China. From the viewpoint of the extreme of the BTC maximum daily rainfall, the characteristics of BTC extreme rainfall (BTCER) during 1960–2018 are analyzed, using daily rainfall data; and some representative large-scale mean flows, in which the associated BTCs are embedded, are analyzed. Results show that the frequency of BTCER shows
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Recent Changes in Heavy Precipitation Events in Northern Central China and Associated Atmospheric Circulation Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-21 Tingting Han, Xinyi Guo, Botao Zhou, Xin Hao
Northern Central China (NC China) is a seriously arid region. Precipitation variations are vital for environmental protection and socio-economical development. This study investigates the recent changes in summer heavy precipitation (HP) events over NC China and associated atmospheric circulation anomalies. Compared with the period of 1986–2002, the HP amount and frequency both significantly increase
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Evaluation of the Potential Use of Satellite-Derived XCO 2 in Detecting CO 2 Enhancement in Megacities with Limited Ground Observations: A Case Study in Seoul Using Orbiting Carbon Observatory-2 Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-21 Chaerin Park, Sujong Jeong, Hoonyoung Park, Jeongmin Yun, Junjie Liu
Exact assessment of urban atmospheric CO2 enhancement, which is higher than background CO2 concentrations, is critical to mitigate carbon emissions in the city. However, ground-based atmospheric CO2 measurements covering the diverse landscape across the city are still limited. This study utilizes the column integrated CO2 concentration (XCO2) data obtained from the NASA Orbiting Carbon Observatory-2
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A Study on the Trend of the Upper Tropospheric Water Vapor over the Tibetan Plateau in Summer Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-21 Xiran Xu, Hongying Tian, Kai Qie, Xin He, Ruhua Zhang, Houwang Tu
Using ERA-Interim and ERA-5 reanalysis datasets combined with measurements from the Microwave Limb Sounder (MLS), we divided the Tibetan Plateau (TP) into three regions to analyse the long-term trends of water vapor in the upper troposphere and its possible mechanisms. The conclusions are as follows. The water vapor at 200 hPa in the summers from 1979 to 2016 over Region 1 (34°N-40°N, 80°E-100°E) shows
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Annual Cycle of Tropical and Subtropical Precipitation Estimated from TMPA 3B42 Dataset Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-14 Peeravit Koad, Krisanadej Jaroensutasinee
The annual cycles of tropical and subtropical precipitation were estimated by parameterizing them using the inferential circular statistics approach. The Tropical Rainfall Measuring Mission (TRMM) Multi-satellite Precipitation Analysis (TMPA) version 7 dataset which has spatial coverage from 50°S to 50°N and temporal coverage from 1998 to 2018 (21 years) was used to compute the monthly precipitation
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Characteristics of Precipitation Particles Measured by PARSIVEL Disdrometer at a Mountain and a Coastal Site in Korea Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-04-14 Joo Wan Cha, Seong Soo Yum
This study analyzed HC (Hydrometeor Classification), rain rate, and DSD (Drop Size Distribution) observed using an optical disdrometer, parsivel, at a mountain (Daegwallyeong, DG) and a coastal site (Mokpo, MP) over 2 years (2010–2011). The HC accuracies of the drizzle, rain, and snow were about 95%, 87%, and 80% respectively. The R2 (coefficient of determination) of the parsivel with TB (Tipping Bucket)
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Comparison and Analysis of Meteorological Variables Observed from the Glacier Area over the Tianshan Mountains in Kyrgyzstan and China Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-31 Honglin Pan, Wen Huo, Kanike Raghavendra Kumar, Ali Mamtimin, Minzhong Wang, Junjian Liu, Chenglong Zhou, Fan Yang, Xinghua Yang
Abstract Due to the special natural environment over the glacier area in the Tianshan Mountains, the observation of meteorological data became difficult and is strictly scarce. Using the available data observed from the automatic meteorological station (AMS) installed on the Western Tianshan Mountain Station (WTMS) in Kyrgyzstan, the daily and seasonal variations of meteorological variables including
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Identifying the Annual and Seasonal Trends of Hydrological and Climatic Variables in the Indus Basin Pakistan Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-26 Muhammad Shahid, Khalil Ur Rahman
Abstract The uneven hydro-climatic changes and droughts have significantly affected the socioeconomic condition of people dependent on the Indus basin, Pakistan. This study aims to examine the annual and seasonal hydro-climatic trends for the Upper Indus Basin (UIB), Middle Indus Basin (MIB) and Lower Indus Basin (LIB). The mean monthly data from 44 meteorological and 30 hydrological stations have
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An Analogy toward the Real-Time Multivariate MJO Index to Improve the Estimation of the Impacts of the MJO on the Precipitation Variability over Iran in the Boreal Cold Months Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-26 Sharifoddin Mansouri, Mohammad A. Masnadi-Shirazi, Shapour Golbahar-Haghighi, Mohammad J. Nazemosadat
Abstract In addition to the tropical data, the OLR/U850/U200 data on a restricted region in southwestern Asia (17.5°N-35°N, 30°E-60°E) has been incorporated into the calculation of the Real-time Multivariate MJO (RMM) index. Introducing this data modifies the leading EOFs of the RMM index slightly and rotates them 14° eastward as a consequence of the change in the column variances of the RMM anomaly
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Impact of the August Asian–Pacific Oscillation on Autumn Precipitation in Central Eastern China Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-12 Zouxing Lin, Jiajin Zhu, Wei Hua, Guangzhou Fan
Abstract The August Asian–Pacific Oscillation (APO) plays an important role in the variability of autumn (September ~ October mean) precipitation in central eastern China (CEC). Using observational and reanalysis data, the impact of the August APO on autumn CEC precipitation from 1960 to 2016 was studied. The statistical result showed that August APO is closely linked to the autumn precipitation anomalies
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Impact of Synoptic Weather Types on Ground-Level Ozone Concentrations in Guangzhou, China Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-12 Wenhui Liao, Luolin Wu, Shengzhen Zhou, Xuemei Wang, Deliang Chen
Abstract Although precursor concentrations were reduced by emission control in Guangzhou, southern China from 2006 to 2016, ground-level O3 concentrations increased, forming potential risks to human health. This study explored the impacts of large-scale synoptic weather circulations on O3 concentration in Guangzhou, in a particular focus on high O3 pollution episodes. Twelve local weather types were
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Correction to: Non-tropical Cyclone Related Winter Heavy Rainfall Events over the Philippines: Climatology and Mechanisms Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-27 Lyndon Mark Olaguera, Jun Matsumoto, Julie Mae B. Dado, Gemma Teresa T. Narisma
The article "Non-tropical Cyclone Related Winter Heavy Rainfall Events over the Philippines: Climatology and Mechanisms", written by Lyndon Mark Olaguera, Jun Matsumoto, Julie Mae B. Dado and Gemma Teresa T. Narisma, was originally published electronically on the publisher’s internet portal on 02 January 2020 without open access.
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Correction to: Possible Mechanisms of Long-Term Trend of June Rainfall over the Korean Peninsula Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-18 Hyeran Lee, Hwan-Jin Song, Byung-Ju Sohn
The article “Possible Mechanisms of Long-Term Trend of June Rainfall over the Korean Peninsula”, written by Hyeran Lee, Hwan-Jin Song and Byung-Ju Sohn, was originally published electronically on the publisher’s internet portal on 08 January 2020 without open access.
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Isotropic High-Order Filter for a Local Domain on the Sphere Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-07 Hyeong-Bin Cheong, Ye-Jin Nam, Chung-Hui Lee, Jae-Jin Kim
Abstract High-order filtering with isotropy of a local-domain data defined at an arbitrary location on the sphere, with an application to scale-decomposition of mean sea level pressure field, was investigated. The equation of high-order filter was based on the implicit hyper-diffusion of 8th-order, which was discretized by the Fourier-finite element method (FFEM). In order to apply the FFEM high-order
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Evaluation and Projection of Regional Climate over East Asia in CORDEX-East Asia Phase I Experiment Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-06 Gayoung Kim, Dong-Hyun Cha, Changyong Park, Chun-Sil Jin, Dong-Kyou Lee, Myoung-Seok Suh, Seok-Geun Oh, Song-You Hong, Joong-Bae Ahn, Seung-Ki Min, Hyun-Suk Kang
Abstract This study investigates the performance of simulated precipitation and estimates future changes in precipitation in CORDEX-East Asia Phase I. In the Historical experiment (1981–2005), a global climate model used as a lateral boundary condition does not realistically simulate the timing and intensity of the East Asian summer monsoon. Hence, it overestimates precipitation over East Asia. Generally
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Intensity Change of NORU (2017) During Binary Tropical Cyclones Interaction Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-06 Lu Li, Xuyang Ge
Abstract In this study, the intensity change of tropical cyclone (TC) Noru (1705) is investigated by using numerical simulations. TC Noru experienced a weakening stage during the binary interaction with TC Kulap (1706). In the presence of Kulap, the model captures well the observed intensity change. On the contrary, once Kulap is removed, it fails to reproduce the weakening stage of Noru. Possible
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Spatio-Temporal Variability of Rainfall Indices and their Teleconnections with El Niño-Southern Oscillation for Tapi Basin, India Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-03 Lalit Kumar Gehlot, Shubham M. Jibhakate, Priyank J. Sharma, P. L. Patel, P. V. Timbadiya
Abstract The long-term spatio-temporal variability in twelve rainfall indices across Tapi basin are investigated for period 1944–2013. The temporal trends in aforesaid indices, representing magnitude, intensity, frequency and duration of rainfall, are analysed using non-parametric tests. The total annual rainfall exhibit uniformly increasing trends over Lower Tapi basin (LTB), while heterogeneous trends
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Evaluation of Satellite Based Precipitation Products at Key Basins in Bolivia Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-31 Jhonatan Ureña, Oliver Saavedra
This study has evaluated Satellite Based Precipitation (SBP) products at key basins in Bolivia. Three basins of national interest were selected at different ecological steps: highlands, valleys and lowlands. GSMaP and CHIRPS products were tested showing promising detection abilities especially in regions with high elevation. At highlands the correlation coefficients of both SBP products showed values
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Evaluating the Applicability of the PUSH Framework to Quasi-Global Infrared Precipitation Retrievals at 0.5°/Daily Spatial/Temporal Resolution Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-03-12 S. Khan, V. Maggioni
Error estimates associated with satellite precipitation retrievals are crucial to allow inferences about the reliability of such products in their operational applications. However, evaluating satellite precipitation error characteristics is challenging because of the inherent temporal and spatial variability of precipitation, measurement errors, and sampling uncertainties, especially at fine temporal
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Improvement of the Rapid-Development Thunderstorm (RDT) Algorithm for Use with the GK2A Satellite Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-02-17 Jae-Geun Lee, Ki-Hong Min, Heechul Park, Yongku Kim, Chu-Yong Chung, Eun-Chul Chang
New technologies for the classification of convective cloud lifecycles and the prediction of their movements are needed to detect severe convective weather and to support objective cloud guidance. Satellites enable earlier detection of severe weather over larger coverage areas than ground-based observations or radar. The use of satellite observations for nowcasting is thus likely. In this study, convective
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Variability and Predictability of Summer Monsoon Rainfall over Pakistan Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-01-30 Muhammad Adnan, Firdos Khan, Nadia Rehman, Shaukat Ali, Sher Shah Hassan, Muhammad Mubashar Dogar, Shahbaz Mehmood, Shabehul Hasson
Rainfall variability associated with the South Asian Summer Monsoon has increased in recent decades, particularly at the northwestern monsoon margins over Pakistan, leading to more frequent and intense hydro-meteorological extremes that have adversely affected the agrarian economy, water and food security in the country. Devising effective strategies to ensure sustainable development in Pakistan thus
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The Dust Deposition Process and Biogeochemical Impacts in the Northern South China Sea Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-01-27 Shuhuan Du, G. M. Ariful Islam, Rong Xiang, Xiaoli Yang
Modern dust plays essential roles in marine sediments, providing nutrient and crucial elements for primary productivity and aquatic ecosystems. However, present marine atmospheric dust observational evidence concerning the biogeochemical response to dust deposition process is spared for a long time. Here a total of 147 aerosols samples were collected near the northern South China Sea (SCS) coast between
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Correction to: Impact of Spring AAO on Summertime Precipitation in the North China Part: Observational Analysis Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-01-23 Zhengxuan Yuan, Jun Qin, Shuanglin Li, Sijing Huang, Yassin Mbululo
The original version of this article unfortunately contains some mistakes.
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Calculation Algorithm of Upward Longwave Radiation Based on Surface Types Asia Pac. J. Atmos. Sci. (IF 1.833) Pub Date : 2020-01-22 Hyun-Seok Jung, Kyu-Tae Lee, Il-Sung Zo
Upward longwave radiation (ULR) is an important element for climate change analysis. We calculated ULR using land surface temperature (LST), sea surface temperature (SST), and downward longwave radiation (DLR) data from the Moderate Resolution Imaging Spectroradiometer (MODIS) and Cloud and the Earth’s Radiant Energy System (CERES), along with broadband emissivity calculated using four multiple linear