자기조직화지도(Self-Organizing Map)를 이용한 최근 우리나라 여름철 극한온도 특성 분류
Investigation on Characteristics of Summertime Extreme Temperature Events Occurred in South Korea Using Self-Organizing Map
0
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
This study investigates the characteristic spatial patterns and dynamic processes associated with the summertime extreme temperature events in South Korea during the last 20 years (1995~2014) using Self-Organizing Map (SOM). The classified SOM patterns commonly have high temperature and anticyclonic circulation anomalies over South Korea. The two major teleconnection patterns are identified: one is from the subtropical western North Pacific (WNP) affecting to the north and the other is from the North Atlantic (NA) affecting downstream region. The meridional teleconnection pattern is related to the forcing of positive sea surface temperature (SST) anomaly over the WNP. The northward propagating Rossby wave generates the East Asia-Pacific (EAP) pattern to form an anticyclonic circulation anomaly over South Korea. On the other hand, NA SST anomalies generate an eastward Rossby wave train across the Eurasian continent, leading to the development of an anticyclonic circulation anomaly over South Korea. The EAP pattern occurs more frequently in July and August, whereas the midlatitude teleconnection pattern associated with NA SST anomalies develops more frequently in early summer (June).
Abstract
This study investigates the characteristic spatial patterns and dynamic processes associated with the summertime extreme temperature events in South Korea during the last 20 years (1995~2014) using Self-Organizing Map (SOM). The classified SOM patterns commonly have high temperature and anticyclonic circulation anomalies over South Korea. The two major teleconnection patterns are identified: one is from the subtropical western North Pacific (WNP) affecting to the north and the other is from the North Atlantic (NA) affecting downstream region. The meridional teleconnection pattern is related to the forcing of positive sea surface temperature (SST) anomaly over the WNP. The northward propagating Rossby wave generates the East Asia-Pacific (EAP) pattern to form an anticyclonic circulation anomaly over South Korea. On the other hand, NA SST anomalies generate an eastward Rossby wave train across the Eurasian continent, leading to the development of an anticyclonic circulation anomaly over South Korea. The EAP pattern occurs more frequently in July and August, whereas the midlatitude teleconnection pattern associated with NA SST anomalies develops more frequently in early summer (June).
참고문헌 (40)
- L. V. Alexander, "Global observed changes in daily climate extremes of temperature and precipitation", Journal of Geophysical Research, 111(D5) (2006), American Geophysical Union (AGU)[DOI]
- Benjamini, Y., "Controlling the false discovery rate: A practical and powerful approach to multiple testing", J. Roy. Stat. Soc., 57, pp.289~300 (1995)
- Emily Black, "Factors contributing to the summer 2003 European heatwave", Weather, 59(8), pp.217~223 (2004), Wiley[DOI]
- Chu, J.-E., "Nonlinear, intraseasonal phases of the East Asian summer monsoon:Extraction and analysis using self-organizing maps", J. Climate, 25, pp.6975~6988 (2012)[DOI]
- Coumou, D., "Global increase in record-breaking monthly-mean temperatures", Climatic Change, 118, pp.771~782 (2013)[DOI]
- Ding, Q., "Circumglobal teleconnection in the Northern Hemisphere summer", J. Climate, 18, pp.3483~3505 (2005)[DOI]
- Field, C. B., "Managing the Risks of Extreme Events and Disasters to Advance Climate Change Adaptation", pp.582~ (2012), Cambridge University Press
- Gill, A. E., "Some simple solutions for heat-induced tropical circulation", Quart. J. Roy. Meteor. Soc., 106, pp.447~462 (1980)[DOI]
- Hall, N. M. J., "The extratropical signal generated by a midlatitude SST anomaly. Part I: Sensitivity at equilibrium", J. Climate, 14, pp.2035~2053 (2001)[DOI]
- Hartmann, D. L., "Climate Change 2013: The Physical Science Basis", pp.159~254 (2014), Cambridge University Press
- Stephanie C. Herring, "Explaining Extreme Events of 2014 from a Climate Perspective", Bulletin of the American Meteorological Society, 96(12), pp.S1~S172 (2015), American Meteorological Society[DOI]
- Daniel E. Horton, "Contribution of changes in atmospheric circulation patterns to extreme temperature trends", Nature, 522(7557), pp.465~469 (2015), Springer Science and Business Media LLC[DOI]
- Huang, R., "Influence of the heat source anomaly over the tropical western Pacific on the subtropical high over East Asia", Proc. Int. Conf. on the General Circulation of East Asia, pp.40~51 (1987), ICGC
- Masao Kanamitsu, "NCEP–DOE AMIP-II Reanalysis (R-2)", Bulletin of the American Meteorological Society, 83(11), pp.1631~1644 (2002), American Meteorological Society[DOI]
- Ryuichi Kawamura, "Tropical and Mid-latitude 45-Day Perturbations over the Western Pacific During the Northern Summer", Journal of the Meteorological Society of Japan. Ser. II, 74(6), pp.867~890 (1996), Meteorological Society of Japan[DOI]
- Han-Kyoung Kim, "Cluster Analysis of Tropical Cyclone Tracks over the Western North Pacific Using a Self-Organizing Map", Journal of Climate, 29(10), pp.3731~3751 (2016), American Meteorological Society[DOI]
- T. Kohonen, "The self-organizing map", Proceedings of the IEEE, 78(9), pp.1464~1480 (1990), Institute of Electrical and Electronics Engineers (IEEE)[DOI]
- Kohonen, T., "Self-Organizing Maps", pp.30~ (1997), Springer-Verlag
- K. Kornhuber, "Evidence for wave resonance as a key mechanism for generating high-amplitude quasi-stationary waves in boreal summer", Climate Dynamics, 49(5-6), pp.1961~1979 (2017), Springer Science and Business Media LLC[DOI]
- MinHo Kwon, "Decadal change in relationship between east Asian and WNP summer monsoons", Geophysical Research Letters, 32(16) (2005), American Geophysical Union (AGU)[DOI]
- Lau, W. K. M., "The 2010 Pakistan flood and Russian heat wave: Teleconnection of hydrometeorological extremes", J. Hydrometeor., 13, pp.392~403 (2012)[DOI]
- Min-Hee Lee, "The Recent Increase in the Occurrence of a Boreal Summer Teleconnection and Its Relationship with Temperature Extremes", Journal of Climate, 30(18), pp.7493~7504 (2017), American Meteorological Society[DOI]
- Lee, W.-S., "Interannual variability of heat waves in South Korea and their connection with large-scale atmospheric circulation patterns", Int. J. Climatol., 36, pp.4815~4830 (2016)[DOI]
- Lepage, Y., "A combination of Wilcoxon's and Ansari-Bradley's statistics", Biometrika, 58, pp.213~217 (1971)[DOI]
- Lin, H., "Global extratropical response to diabatic heating variability of the Asian summer monsoon", J. Atmos. Sci., 66, pp.2697~2713 (2009)[DOI]
- Nitta, T., "Convective activities in the tropical western Pacific and their impact on the Northern Hemisphere summer circulation", J. Meteor. Soc. Japan, 65, pp.373~390 (1987)[DOI]
- Perkins, S. E., "Relationships between climate variability, soil moisture, and Australian heatwaves", J. Geophys. Res. Atmos., 120, pp.8144~8164 (2015)[DOI]
- Richard W. Reynolds, "Daily High-Resolution-Blended Analyses for Sea Surface Temperature", Journal of Climate, 20(22), pp.5473~5496 (2007), American Meteorological Society[DOI]
- 서경환, "장마의 재조명", 대기, 21(2), pp.109~121 (2011), 한국기상학회
- Kyong-Hwam Seo, "Northern East Asian Monsoon Precipitation Revealed by Airmass Variability and Its Prediction", Journal of Climate, 28(15), pp.6221~6233 (2015), American Meteorological Society[DOI]
- Siegfried D. Schubert, "Northern Eurasian Heat Waves and Droughts", Journal of Climate, 27(9), pp.3169~3207 (2014), American Meteorological Society[DOI]
- Ueda, H., "Maturing process of the summer monsoon over the western North Pacific: A coupled ocean", atmosphere system, 1996, pp.74, 493~508
- Ueda, H., "Abrupt seasonal change of large-scale convection activity over the western Pacific in the northern summer", J. Meteor. Soc. Japan, 73, pp.795~809 (1995)[DOI]
- Wang, B., "Pacific-East Asian teleconnection:How does ENSO affect East Asian climate?", J. Climate, 13, pp.1517~1536 (2000)[DOI]
- Watanabe, M., "Atmosphere-ocean thermal coupling in the North Atlantic: A positive feedback", Quart. J. Roy. Meteor. Soc., 126, pp.3343~3369 (2000)[DOI]
- Watanabe, M., "Corrigendum", Quart. J. Roy. Meteor. Soc., 127, pp.733~734 (2001)[DOI]
- Wilks, D. S., "On ''field significance'' and the false discovery rate", J. Appl. Meteor. Climatol., 45, pp.1181~1189 (2006)[DOI]
- Zhiwei Wu, "An empirical seasonal prediction model of the east Asian summer monsoon using ENSO and NAO", Journal of Geophysical Research, 114(D18) (2009), American Geophysical Union (AGU)[DOI]
- Xie, S-P., "A coupled oceanatmosphere model of relevance to the ITCZ in the eastern Pacific", Tellus A, 46, pp.340~350 (1994)[DOI]
- Yonetani, T., "Abrupt changes in regional temperature in the conterminous United States, 1895-1989", Climate Res., 4, pp.13~23 (1994)[DOI]