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APCC Researchers Received the Best Paper Presentation Award at the 2019 KMS Spring Conference of Climate Division.
Ms. Gayoung Kim (Researcher), Dr. Yun-Young Lee (Research Fellow), Mr. Soonjo Yoon (Researcher) and Dr. Ji-Hyun Oh (Research Fellow) from the APEC Climate Center (APCC) received the Best Paper Presentation Award at the 2019 Korean Meteorological Society (KMS) Spring Conference of Climate Division, held between the 22th and 25th April, 2019 at EXCO, Daegu, Korea.They presented the contents of their research paper entitled “ Assessment of Intraseasonal Multi-Model Ensemble (MME) Prediction Skill Using Subseasonal to Seasonal (S2S) Models” during the poster presentation at the 2019 KMS Spring Conference of Climate Division, and was awarded the Best Paper Presentation Award. The four researchers coauthored the paper.Intraseasonal prediction information refers to the climate forecast information for the period between 2 weeks (15 days) and 2 months (60 days). Extreme hydrological events such as droughts and floods occur often and cause great harm to the population and infrastructure during this period. So far, it is well known that there are many challenges to improving the reliability of intraseasonal prediction information.In this context, the four APCC researchers conducted the research on the ‘ Assessment of Intraseasonal MME Prediction Skill Using S2S Models’ as the 1st phase in developing technology for improving the reliability of intraseasonal MME prediction.The researchers found that El Nino-Southern Oscillation (ENSO) has an deep impact on the reliability of intraseasonal MME prediction. In addition, the reliability of the intraseasonal MME prediction are found to be affected by Quasi-Biennial Oscillation (QBO) at the upper layers of the atmosphere. Their research discovered that especially when the east wind of QBO is dominant, the reliability of intraseasonal MME prediction is rapidly improved.APCC has been producing and providing reliable seasonal prediction information based on analysis using the MME technique since 2005. ​
Date : 2019.05.02
APCC Researcher Led Discovery of Close Links between Heatwaves in California and Tropical Rainfalls Half a World Away.
In the recent research paper entitled ‘Evidence of Specific the Madden-Julian Oscillation (MJO) Phase Occurrence with Summertime California Central Valley Extreme Hot Weather’, Dr. Yun-Young Lee of the APEC Climate Center (lead author) and Prof. Richard Grotiahn of the University of California Davis discovered that heavy rain over the Indian Ocean and Southeast Asia and the eastern Pacific Ocean would imply the impending heatwaves in central California. The results will be published in the cover article of the journal Advances in Atmospheric Sciences 2019 June Edition.MJO is characterized by an eastward spread of large regions of enhanced and suppressed tropical rainfall, mainly observed over the Indian and Pacific Ocean. This pattern of tropical rainfall tends to lose its identity as it moves over the cooler waters of the eastern Pacific, before reappearing at some point over the Indian Ocean again. Each cycle lasts approximately 30-90 days.The collaborative research team suggested in the research paper that heat waves in the Central California Valley half a world away have very close links with the occurrence of strong rain clouds and rainfalls over Indian Ocean. Southeast Asia, and eastern Pacific Ocean. The collaborative research team analyzed the heat wave data from June through September from 1979 to 2010. The data were collected by 15 National Climatic Data Center stations located throughout the valley. From these data, the researchers identified 24 heat waves. They compared these instances to the phase of a large, travelling atmospheric circulation pattern called MJO.It is well known that tropical rainfall by MJO have effects beyond the tropics. Based on this fact, Dr. Lee and Prof. Grotjahn found that enhanced rainfall in the tropics preceded each heat wave in specific and relatively predictable patterns. When the strong rainfall occurs over Indian Ocean and Southeast Asia and the eastern Pacific Ocean, the temperatures in central California is most likely to rise to 100 degrees Fahrenheit in 4 to 16 daysThey also tried to find out how the strong rain clouds have an impact on the weather in North America half a world away across the Pacific Ocean. Because the large scale convective activity related to MJO alters the global atmospheric circulation, the descent stream occurs around the Californian coast. It maintains strong solar radiation in this area for a while. The research paper proposes that this strong solar radiation may bring record-breaking heatwaves to this area.
Date : 2019.04.29
APCC Center Held a Technical Cooperation Workshop on the CLimate Information toolKit (CLIK) with the Sri Lanka Meteorological Department
APEC Climate Center (APCC) held a technical cooperation workshop with 4 climate prediction officers from the Sri Lanka Meteorological Department on 23-25 April 2019 at APCC headquarters in Busan, Korea.The workshop aimed to strengthen the capacity to produce and verify downscaled seasonal climate prediction information in Sri Lanka.This workshop was held as a response to Sri Lanka Meteorological Department’s request for APCC’s technical cooperation and support to strengthen its technical capacity in the climate sector. The Sri Lanka Meteorological Department is also currently participating in the Green Climate Fund project entitled ‘Climate Resilient Integrated Water Management Project (CRIWMP)’.The 4 climate prediction officers from the Sri Lanka Meteorological Department were able to learn, directly from APCC researchers, how to conduct seasonal prediction in Sri Lanka utilizing the CLimate Information toolKit (CLIK, www.apcc21.org/ser/clik.do?lang=eng).They not only learned how to extract downscaled prediction information, which reflects the terrain and climate characteristics in Sri Lanka, but also how to verify the degree of correspondence between two pieces of information by comparing and evaluating predicted information with observations.The participants also had the opportunity to increase their knowledge on the Boreal Summer Intraseasonal Oscillation (BSISO). This information can be used to produce Subseasonal-to-Seasonal (S2S) prediction information in Sri Lanka.
Date : 2019.04.25