A5091389074- Climate variability and models
- Oceanographic and Atmospheric Processes
- Meteorological Phenomena and Simulations
- Atmospheric and Environmental Gas Dynamics
- Tropical and Extratropical Cyclones Research
- Arctic and Antarctic ice dynamics
- Marine and coastal ecosystems
- Atmospheric Ozone and Climate
- Climate change and permafrost
- Ocean Acidification Effects and Responses
- Cryospheric studies and observations
- Geophysics and Gravity Measurements
- Geology and Paleoclimatology Research
- Methane Hydrates and Related Phenomena
- Atmospheric chemistry and aerosols
- Plant Water Relations and Carbon Dynamics
- Geological and Geophysical Studies
- Fire effects on ecosystems
- Fluid Dynamics and Turbulent Flows
- Climate Change Policy and Economics
- Energy Load and Power Forecasting
- Atmospheric aerosols and clouds
- Tree-ring climate responses
- Climate change impacts on agriculture
- Hydrological Forecasting Using AI
Seoul National University
2002-2025
Pohang University of Science and Technology
2015-2024
Advanced Institute of Convergence Technology
2021-2024
Yonsei University
2020-2024
University of Hawaii System
2008-2024
Korea Post
2020-2024
Pusan National University
2020-2024
Nanjing University of Information Science and Technology
2023-2024
Institute of Information Science
2023
APEC Climate Center
2023
Abstract In this study, two types of El Niño events are classified based on spatial patterns the sea surface temperature (SST) anomaly. One is cold tongue (CT) Niño, which can be regarded as conventional and other warm pool (WP) Niño. The CT characterized by relatively large SST anomalies in Niño-3 region (5°S–5°N, 150°–90°W), while WP associated with mostly confined to Niño-4 160°E–150°W). addition, many atmospheric oceanic variables also distinctively different for events. Furthermore,...
Abstract El Niño and Southern Oscillation (ENSO) is the most prominent year‐to‐year climate fluctuation on Earth, alternating between anomalously warm (El Niño) cold (La Niña) sea surface temperature (SST) conditions in tropical Pacific. ENSO exerts its impacts remote regions of globe through atmospheric teleconnections, affecting extreme weather events worldwide. However, these teleconnections are inherently nonlinear sensitive to SST anomaly patterns amplitudes. In addition, modulated by...
We assessed current status of multi-model ensemble (MME) deterministic and probabilistic seasonal prediction based on 25-year (1980–2004) retrospective forecasts performed by 14 climate model systems (7 one-tier 7 two-tier systems) that participate in the Climate Prediction its Application to Society (CliPAS) project sponsored Asian-Pacific Economic Cooperation Center (APCC). also evaluated seven DEMETER models' MME for period 1981–2001 comparison. Based assessment, future direction...
Abstract Basinwide convective anomalies over the Indian Ocean (IO) associated with Madden–Julian oscillation (MJO) sometimes propagate eastward and reach west Pacific (WP), but do not. Long-term observations reanalysis products are used to investigate difference between propagating nonpropagating MJO events. IO convection onset events grouped into three categories based on strengths of simultaneous dry eastern Maritime Continent WP. The anomaly preferentially makes propagation reaches WP...
Climate variability in the tropical Pacific affects global climate on a wide range of time scales. On interannual scales, is home to El Niño–Southern Oscillation (ENSO). Decadal variations and changes Pacific, referred here collectively as decadal (TPDV), also profoundly affect system. Here, we use TPDV refer any form or change that occurs atmosphere, ocean, over land within Pacific. “Decadal,” which broad sense encompass multiyear through multidecadal includes about mean state externally...
Abstract Some climate variables do not show the same response to declining atmospheric CO 2 concentrations as before preceding increase. A comprehensive understanding of this hysteresis effect and its regional patterns is, however, lacking. Here we use an Earth system model with idealized removal scenario that surface temperature precipitation exhibit globally widespread irreversible changes over a timespan centuries. To explore reversibility on scale, develop quantification method...
Abstract A feedback process of the Indian Ocean SST on ENSO is investigated by using observed data and atmospheric GCM. It suggested that warming in produces an easterly wind stress anomaly over Indonesia western edge Pacific during mature phase El Niño. The anomalous Niño helps a rapid termination fast transition to La Niña generating upwelling Kelvin waves. Thus, Ocean, which part signal, operates as negative mechanism ENSO. This appears operate mostly for relatively strong Niños results...
Abstract Recent studies report that two types of El Niño events have been observed. One is the cold tongue (CT) Niño, which characterized by relatively large sea surface temperature (SST) anomalies in eastern Pacific, and other warm pool (WP) SST are confined to central Pacific. Here, both analyzed a long-term coupled GCM simulation. The present model simulates major observed features incorporating distinctive patterns each oceanic atmospheric variable. It also demonstrated type has quite...
The asymmetric nature of El Niño and La Niña sea surface temperature (SST) anomalies is investigated by the use National Centers for Environmental Prediction reanalysis data various ocean atmosphere models. It demonstrated that relatively weak SST during compared with those are related to westward shift wind stress 10°–15°. characteristics atmospheric responses confirmed general circulation model experiments two different anomalies, which have equal amplitude but opposite sign from each...
Abstract Two distinct roles of the Atlantic sea surface temperatures (SSTs), namely, North Tropical (NTA) SST and Niño, on El Niño–Southern Oscillation (ENSO) variability are investigated using observational data from 1980 to 2010 coupled model experiments. It appears that NTA Niño can be used as two independent predictors for predicting development ENSO events in following season. Furthermore, they likely linked different types events. Specifically, cooling during February, March, April...
Abstract Strong El Niño events are followed by massive summer monsoon flooding over the Yangtze River basin (YRB), home to about a third of population in China. Although Niño–Southern Oscillation (ENSO) provides main source seasonal climate predictability for many parts Earth, mechanisms its connection East Asian remain largely elusive. For instance, traditional Niño3.4 ENSO index only captures precipitation anomalies Asia boreal winter but not during summer. Here we show that there exists...
[1] In this study, the existence of two types La Nina events is examined using observations and model output. We find that cold in central eastern Pacific SST, are highly correlated unlike corresponding warm events. When defined based on same criteria for events, SST precipitation patterns between much less distinctive or independent. other words, there a strong asymmetric character This also 20 climate models participate CMIP3. Most have difficulty simulating independently El Nino events;...
Abstract The amplitude asymmetry between El Niño and La Niña is investigated by diagnosing the mixed-layer heat budget during ENSO developing phase using three ocean assimilation products: Simple Ocean Data Assimilation (SODA) 2.0.2, SODA 1.4.2, Global System (GODAS). It found that nonlinear zonal meridional temperature advections are essential to cause in far eastern Pacific, whereas vertical advection has opposite effect. current anomaly dominated geostrophic association with thermocline...