The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY (한국해양학회지:바다)

The Korean Society of Oceanography (한국해양학회)
권호 표지
DOI QR코드

DOI QR Code

Correlation between the Pacific Decadal Oscillation and East/Japan Sea SST in the Autumn

가을철 동해 표층 수온과 태평양 순년 진동의 상관성 분석

  • PAK, GYUNDO (Ocean Circulation and Climate Research Center, Korea Institute of Ocean Science and Technology)
  • 박균도 (한국해양과학기술원 해양순환.기후연구센터)
  • Received : 2019.10.16
  • Accepted : 2019.11.26
  • Published : 2019.11.30
Download PDF
⟨ Previous Next ⟩

Abstract

Analyses with various Sea Surface Temperature (SST) products indicate that the interannual variability of the area-averaged SST in the East/Japan Sea (EJS) is well correlated to that of Pacific Decadal Oscillation (PDO) during 1979-2018, especially in the autumn. The regression analysis with the wind vectors at 200 hPa, where the strongest jet stream flows, suggests that the long-term variability of the intensity as well as the meridional movement of the jet stream are related to the coupling of the autumn EJS SST and PDO. When the axis of the jet stream moves poleward (equatorward) with its weakening (strengthening), both the EJS SST and North Pacific SST increase (decrease). This suggests that both the intensity and meridional movement of the jet stream are possibly related to the coupling of the autumn EJS SST and PDO. However, effects of a weak jet stream during the summer and the strong East Asian winter monsoon make weak coupling between the EJS SST and PDO.

다양한 표층 수온 자료를 통해 1979년부터 2018년 기간 동안의 가을철 동해 공간 평균 표층 수온이 태평양 순년 진동과 높은 상관관계를 나타내는 것을 확인하였다. 이 해역에서 제트류의 활동이 가장 강한 200 hPa에서의 바람과 동해 표층 수온의 회귀 분석 결과, 가을철 동해 표층 수온이 상승할 때 제트류의 중심축이 북상하면서 전반적으로 제트류가 약화하는 경향을 보이며, 동해 수온이 하강할 때는 제트류의 중심축이 남하하면서 제트류가 강화되는 경향을 보였다. 이러한 분석 결과는 제트류의 강도 변화와 중심축의 남북 진동이 동해 표층 수온과 태평양 순년 진동의 커플링과 관련되어 있음을 시사한다. 여름철의 약한 제트류와 겨울철 및 이른 봄철의 강한 동아시아 동계계절풍 효과는 동해와 태평양 순년 진동의 커플링이 가을철 외의 다른 계절에 잘 나타나지 않게 하는 이유로 생각해볼 수 있다.

Keywords

References

  1. Dee, D.P., S.M. Uppala and A.J. Simmons, P. Berrisford, P. Poli, S. Kobayashi, U. Andrae, M.A. Balmaseda, G. Balsamo, P. Bauer, P. Bechtold, A.C.M. Beljaars, L. van de Berg, J. Bidlot, N. Bormann, C. Delsol, R. Dragani, M. Fuentes, A.J. Geer, L. Haimberger, S.B. Healy, H. Hersbach, E.V. Holm, L. Isaksen, P. Kallberg, M. Kohler, M. Matricardi, A.P. McNally, B.M. Monge-Sanz, J.-J. Morcrette, B.-K. Park, C. Peubey, P. de Rosnay, C. Tavolato, J.-N. Thepaut and F. Vitart, 2011. The ERA-Interim reanalysis: configuration and performance of the data assimilation system. Quarterly Journal of the Royal Meteorological Society, 137: 553-597. https://doi.org/10.1002/qj.828
  2. Good, S.A., M.J. Martin and N.A. Rayner, 2013. EN4: Quality controlled ocean temperature and salinity profiles and monthly objective analyses with uncertainty estimates. Journal of Geophysical Research: Oceans, 118: 6704-6716. https://doi.org/10.1002/2013JC009067
  3. Gordon, A.L. and C.F. Giulivi, 2004. Pacific decadal oscillation and sea level in the Japan/East sea. Deep Sea Research Part I: Oceanographic Research Papers, 51: 653-663. https://doi.org/10.1016/j.dsr.2004.02.005
  4. Hirose, N. and K.-I. Fukudome, 2006. Monitoring the Tsushima Warm Current Improves Seasonal Prediction of the Regional Snowfall. Scientific Online Letters on the Atmosphere, 2: 61-63.
  5. Hirose, N., K. Nishimura and M. Yamamoto, 2009. Observational evidence of a warm ocean current preceding a winter teleconnection pattern in the northwestern Pacific. Geophysical Research Letters, 36: L09705. https://doi.org/10.1029/2009GL037448
  6. Huang, B., P.W. Thorne, V.F. Banzon, T. Boyer, G. Chepurin, J.H. Lawrimore, M.J. Menne, T.M. Smith, R.S. Vose and H.-M. Zhang, 2017. Extended Reconstructed Sea Surface Temperature, Version 5 (ERSSTv5): Upgrades, Validations, and Intercomparisons. Journal of Climate, 30: 8179-8205. https://doi.org/10.1175/JCLI-D-16-0836.1
  7. Huang, G. and Y. Liu, 2011. Simulation of the East Asian Subtropical Westerly Jet Stream with GFDL AGCM (AM2.1). Atmospheric and Oceanic Science Letters, 4: 24-29. https://doi.org/10.1080/16742834.2011.11446902
  8. Jo, H.-S., S.-W. Yeh and C.-H. Kim, 2013. A possible mechanism for the North Pacific regime shift in winter of 1998/1999. Geophysical Research Letters, 40: 4380-4385. https://doi.org/10.1002/grl.50798
  9. Kalnay, E., M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, M. Iredell, S. Saha, G. White, J. Woollen, Y. Zhu, M. Chelliah, W. Ebisuzaki, W. Higgins, J. Janowiak, K.C. Mo, C. Ropelewski, J. Wang, A. Leetmaa, R. Reynolds, R. Jenne and D. Joseph, 1996. The NCEP/NCAR 40-year reanalysis project. Bulletin of the American Meteorological Society, 77: 437-471. https://doi.org/10.1175/1520-0477(1996)077<0437:TNYRP>2.0.CO;2
  10. Mantua, N.J. and S.R. Hare, 2002. The Pacific Decadal Oscillation. Journal of Oceanography, 58: 35-44. https://doi.org/10.1023/A:1015820616384
  11. Pak, G., Y.-H. Park, F. Vivier, Y.-O. Kwon and K.-I. Chang, 2014. Regime-Dependent Nonstationary Relationship between the East Asian Winter Monsoon and North Pacific Oscillation. Journal of Climate, 27: 8185-8204. https://doi.org/10.1175/JCLI-D-13-00500.1
  12. Park, Y.-H., J.-H. Yoon, Y.-H. Youn and F. Vivier, 2012. Recent Warming in the Western North Pacific in Relation to Rapid Changes in the Atmospheric Circulation of the Siberian High and Aleutian Low Systems. Journal of Climate, 25: 3476-3493. https://doi.org/10.1175/2011JCLI4142.1
  13. Rayner, N.A., D.E. Parker, E.B. Horton, C.K. Folland, L.V. Alexander, D.P. Rowell, E.C. Kent and A. Kaplan, 2003. Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century. Journal of Geophysical Research-Atmospheres, 108: D14, 4407. https://doi.org/10.1029/2002JD002670
  14. Reynolds, R.W., N.A. Rayner, T.M. Smith, D.C. Stokes and W. Wang, 2002. An Improved In Situ and Satellite SST Analysis for Climate. Journal of Climate, 15: 1609-1625. https://doi.org/10.1175/1520-0442(2002)015<1609:AIISAS>2.0.CO;2
  15. Seo, H., Y.-O. Kwon and J.-J. Park, 2014. On the effect of the East/Japan Sea SST variability on the North Pacific atmospheric circulation in a regional climate model. Journal of Geophysical Research: Atmospheres, 119: 418-444. https://doi.org/10.1002/2013JD020523
  16. Wallace, J.M. and D.S. Gutzler, 1981. Teleconnections in the Geopotential Height Field during the Northern Hemisphere Winter. Monthly Weather Review, 109: 784-812. https://doi.org/10.1175/1520-0493(1981)109<0784:TITGHF>2.0.CO;2
  17. Yamamoto, M. and N. Hirose, 2011. Possible modification of atmospheric circulation over the northwestern Pacific induced by a small semi-enclosed ocean. Geophysical Research Letters, 38: L03804. https://doi.org/10.1029/2010GL046214
  18. Zhang, L., H. Xu, N. Shi and J. Deng, 2017. Responses of the East Asian jet stream to the North Pacific subtropical front in spring. Advances in Atmospheric Sciences, 34: 144-156. https://doi.org/10.1007/s00376-016-6026-x