A5076443181- Climate variability and models
- Meteorological Phenomena and Simulations
- Tropical and Extratropical Cyclones Research
- Oceanographic and Atmospheric Processes
- Atmospheric Ozone and Climate
- Atmospheric and Environmental Gas Dynamics
- Music and Audio Processing
- Advanced X-ray and CT Imaging
- Speech and Audio Processing
- Arctic and Antarctic ice dynamics
- Music Technology and Sound Studies
- Ocean Waves and Remote Sensing
- Psychosocial Factors Impacting Youth
- Digital Radiography and Breast Imaging
- Atmospheric chemistry and aerosols
- Climate change and permafrost
- Photoacoustic and Ultrasonic Imaging
- Radiation Dose and Imaging
- Speech Recognition and Synthesis
- Marine and coastal ecosystems
- Medical Imaging Techniques and Applications
- Marine and fisheries research
- Phytochemistry and biological activities of Ficus species
- Cryospheric studies and observations
- Hydrology and Drought Analysis
Ewha Womans University
2023-2025
Stony Brook University
2016-2025
Electronics and Telecommunications Research Institute
2007-2023
State University of New York
2017-2023
Ewha Womans University Medical Center
2023
Korea Advanced Institute of Science and Technology
2020-2023
Scripps Institution of Oceanography
2023
Stony Brook School
2023
International Graduate School of English
2023
Yonsei University
2016-2021
Two distinctly different forms of tropical Pacific Ocean warming are shown to have substantially impacts on the frequency and tracks North Atlantic cyclones. The eastern (EPW) is identical that conventional El Niño, whereas central (CPW) has maximum temperature anomalies located near dateline. In contrast EPW events, CPW episodes associated with a greater-than-average increasing landfall potential along Gulf Mexico coast Central America. Differences be modulation vertical wind shear in main...
During July 2010, a series of monsoonal deluges over northern Pakistan resulted in catastrophic flooding, loss life and property an agricultural crisis that may last for years. Was the rainfall abnormal compared to previous years? Furthermore, could high probability flooding have been predicted? To address these questions, regional precipitation is analyzed using three dataset sets covering 1981–2010 time period. It concluded 2010 average May August (MJJA) year somewhat greater magnitude...
The seasonal prediction skill for the Northern Hemisphere winter is assessed using retrospective predictions (1982–2010) from ECMWF System 4 (Sys4) and National Center Environmental Prediction (NCEP) CFS version 2 (CFSv2) coupled atmosphere–ocean climate systems. Sys4 shows a cold bias in equatorial Pacific but warm found North part of Atlantic. CFSv2 has strong tongue region eastern to central broad areas over A Southern common both reforecasts. In addition, excessive precipitation Pacific,...
This study assesses the CMIP5 decadal hindcast/forecast simulations of seven state‐of‐the‐art ocean‐atmosphere coupled models. Each prediction consists over a 10 year period each which are initialized every five years from climate states 1960/1961 to 2005/2006. Most models overestimate trends, whereby predict less warming or even cooling in earlier decades compared observations and too much recent decades. All show high skill for surface temperature Indian, North Atlantic western Pacific...
Abstract The Subseasonal Experiment (SubX) is a multimodel subseasonal prediction experiment designed around operational requirements with the goal of improving forecasts. Seven global models have produced 17 years retrospective (re)forecasts and more than year weekly real-time reforecasts forecasts are archived at Data Library International Research Institute for Climate Society, Columbia University, providing comprehensive database research on to seasonal predictability predictions. SubX...
Abstract Since its discovery in the early 1970s, crucial role of Madden‐Julian Oscillation (MJO) global hydrological cycle and tremendous influence on high‐impact climate weather extremes have been well recognized. The MJO also serves as a primary source predictability for Earth system variability subseasonal time scales. remains poorly represented our state‐of‐the‐art forecasting models, however. Moreover, despite advances made recent decades, theories still disagree at fundamental level....
Abstract Many climate models struggle with a poor simulation of the Madden‐Julian Oscillation (MJO), especially its propagation across Maritime Continent (MC). This study quantitatively evaluates robustness MJO over MC in that participated Coupled Model Intercomparison Project Phase 5 (CMIP5) and 6 (CMIP6) newly developed metric. The results show CMIP6 simulate more realistically than CMIP5 models. Lower free‐tropospheric moisture budget analysis highlights greater horizontal advection is...
Abstract Tropical Pacific Ocean warming has been separated into two modes based on the spatial distribution of maximum sea surface temperature (SST) anomaly: an east (EPW) and a central (CPW). When combined with cooling (EPC), these three regimes are shown to have different impacts tropical cyclone (TC) activity over North by differential modulation both local thermodynamic factors large-scale circulation patterns. In EPW years, genesis track density TCs tend be enhanced southeastern part...
Abstract The authors examine the predictability and prediction skill of Madden–Julian oscillation (MJO) two ocean–atmosphere coupled forecast systems ECMWF [Variable Resolution Ensemble Prediction System (VarEPS)] NCEP [Climate Forecast System, version 2 (CFSv2)]. VarEPS hindcasts possess five ensemble members for period 1993–2009 CFSv2 three 2000–09. Predictability are estimated by bivariate correlation coefficient between observed predicted Wheeler–Hendon real-time multivariate MJO index...
Marine ecosystem forecasting is an area of active research and rapid development. Promise has been shown for skillful prediction physical, biogeochemical, ecological variables on a range timescales, suggesting potential forecasts to aid in the management living marine resources coastal communities. However, mechanisms underlying forecast skill ecosystems are often poorly understood, many forecasts, especially biological variables, rely empirical statistical relationships developed from...
Abstract Producing accurate weather prediction beyond two weeks is an urgent challenge due to its ever-increasing socioeconomic value. The Madden-Julian Oscillation (MJO), a planetary-scale tropical convective system, serves as primary source of global subseasonal (i.e., targeting three four weeks) predictability. During the past decades, operational forecasting systems have improved substantially, while MJO skill has not yet reached potential predictability, partly systematic errors caused...
Abstract This study evaluates the ability of state-of-the-art subseasonal-to-seasonal (S2S) forecasting systems to represent and predict teleconnections Madden–Julian oscillation their effects on weather in terms midlatitude patterns North Atlantic tropical cyclones. evaluation forecast applies novel diagnostics developed track along preferred pathways troposphere stratosphere, measure global regional responses induced by across both Northern Southern Hemispheres. Results this will help...
Abstract Prediction systems to enable Earth system predictability research on the subseasonal time scale have been developed with Community System Model, version 2 (CESM2) using two configurations that differ in their atmospheric components. One uses Atmosphere 6 (CAM6) its top near 40 km, referred as CESM2(CAM6). The other employs Whole Climate (WACCM6) whose extends ∼140 and it includes fully interactive tropospheric stratospheric chemistry [CESM2(WACCM6)]. Both are utilized carry out...
The seasonal prediction skill of the Asian summer monsoon is assessed using retrospective predictions (1982–2009) from ECMWF System 4 (SYS4) and NCEP CFS version 2 (CFSv2) systems. In both SYS4 CFSv2, a cold bias sea-surface temperature (SST) found over equatorial Pacific, North Atlantic, Indian Oceans broad region in Southern Hemisphere relative to observations. contrast, warm northern part Pacific Atlantic. Excessive precipitation along ITCZ, Ocean maritime continent. southwest flow Somali...
Abstract The characteristics of the MJO propagation across Maritime Continent are investigated using a 20-yr reforecast dataset from ECMWF ensemble prediction system. Analysis events initialized over Indian Ocean (phase 2) shows that initial amplitude and skill relationship is not linear, particularly when predictions start in moderate (between strong weak) category. To examine key factors determine skill, reforecasts category grouped into high- low-skill events, differences their...
Abstract This study assesses the skill of boreal winter Arctic Oscillation (AO) predictions with state‐of‐the‐art dynamical ensemble prediction systems (EPSs): GloSea4, CFSv2, GEOS‐5, CanCM3, CanCM4, and CM2.1. Long‐term reforecasts EPSs are used to evaluate how well they represent AO assess both deterministic probabilistic forecasts AO. The reproduce observed changes in large‐scale patterns Northern Hemispheric surface temperature, upper level wind, precipitation associated different phases...
Predictions of changes the land monsoon rainfall (LMR) in coming decades are vital importance for successful sustainable economic development. Current dynamic models, though, have shown little skill decadal prediction Northern Hemisphere (NH) LMR (NHLMR). The physical basis and predictability such predictions remain largely unexplored. Decadal change NHLMR reflects total NH continental precipitation, tropical general circulation, regional over northern Africa, India, East Asia, North...
Abstract An atmospheric river (AR) event is a strong poleward moisture transport that composed of series spatiotemporally connected instantaneous AR objects. A new object‐based tracking algorithm developed in this study, which aims to identify an and investigate its life cycle from origin termination. The identifies duration, intensity, propagation speed direction, the traveled distance throughout event. applied 6‐hourly column‐integrated water vapor flux November March during period...
Abstract An interdecadal weakening in the North Atlantic storm track (NAST) and a poleward shift of Pacific (NPST) are found during October–March for period 1979–2015. A significant warming surface air temperature (Ts) over northeastern America La Niña–like change under background Arctic amplification to be contributors observed changes NAST NPST, respectively, via modulation local baroclinicity. The baroclinic energy conversion is consistent with tracks an loss from eddies mean flow gain...