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Seminar talk: Hydroclimate Responses to ENSO and Trans-basin Variability over the Globe

June-Yi Lee from Pusan National University and Institute for Basic Science (IBS) Center for Climate Physics (ICCP) will give a seminar talk on 18 September.

June_Yi Lee
June-Yi Lee

Short biography:

I'm an Associate Professor of Research Center for Climate Sciences and Department of Climate System in Pusan National University, Busan, Korea. I'm also affiliated at the Institute for Basic Science (IBS) Center for Climate Physics (ICCP) as a Associate Project Leader on Earth System Predictability. My research interests include predictability and prediction of Earth system components including total soil water, wildfire occurrence, regional sea level, and statistics of climate extremes on timescales of months to decades.




By analyzing observation and model experiments based on the National Center for Atmospheric Research (NCAR) Community Earth System Model (CESM) for 1982-2015, this study investigates how ocean surface temperature anomalies modulate hydroclimate variability including total soil moisture and precipitation over the globe. In observation, El Nino and Southern Oscillation (ENSO) and the Trans-basin variability (TBV) between the Pacific and Atlantic together explain about 50% of total variance of water-year mean total soil moisture in global land. The El Niño (La Niña) provides drier condition over the northern part of South America, South Africa, the Maritime Continents, and Australia (the southern part of North America, the southern part of South America, and horn of Africa) by shifting Intertropical Convergence Zone (ITCZ) and modulating atmospheric circulation. On the other hand, during the positive (negative) phase of the TBV, drier condition prevails over the southern part of North America, northern part of South America, and middle of Africa (Australia and South Asia). We further demonstrate the critical role of ocean variability on total soil water and precipitation in interannual to interdecadal time scales over the globe using the CESM simulation that assimilates ocean temperature and salinity. These results increase understanding in sources of hydroclimate variability and facilitate the possibility for the seasonal to multi-year prediction of total soil water over the many parts of globe up to 2~4 years in advance.


Arranged date for the seminar talk: Sep 18, 2019 at 11:15

Place: BCCR lecture room 4020, Jahnebakken 5