Acta Oceanologica Sinica

, Volume 36, Issue 5, pp 51–56 | Cite as

Dramatic weakening of the ear-shaped thermal front in the Yellow Sea during 1950s–1990s

  • Tana
  • Yue Fang
  • Baochao Liu
  • Shuangwen Sun
  • Huiwu Wang
Article

Abstract

The ear-shaped thermal front (ESTF), formed by the convergence of the Yellow Sea Warm Current (YSWC) and the Shandong Coastal Current (SCC), is a very important oceanic phenomenon in the Yellow Sea (YS) in winter. In situ measurements and reanalysis datasets all demonstrate that the ESTF has been weakening during 1950s–1990s, and a similar weakening trend is also found in winter monsoon over the YS. Numerical experiments show that the weakening of winter monsoon can induce an anomalous circulation in the YS on multi-decadal timescale with northward anomalous currents along China’s coast and southward anomalous currents in the central YS—generally opposite to seasonal mean circulation. The anomalous circulation causes slowdown of the YSWC and the SCC, and thus weakens the ESTF. Since the ESTF plays important roles in regional ocean dynamics and air-sea interactions, its weakening has important implications for regional climate in the YS in winter.

Key words

thermal front Yellow Sea circulation monsoon multi-decadal variability 

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Notes

Acknowledgements

NCEP reanalysis dataset is provided by the NOAA/OAR/ESRL PSD (http://www.esrl.noaa.gov/psd/); ERA-40 reanalysis dataset is prepared by the European Centre for Medium-range Weather Forecasts (http://apps.ecmwf.int/datasets/); in situ SST data are provided by the National Marine Data and Information Service, State Oceanic Administration, China; SODA reanalysis can be downloaded from http://soda.tamu.edu/data.htm; CORA reanalysis dataset is provided by the WMO-IOC Centre for Marine Meteorological and Oceanographic Climate Data (http://www.cmocchina.cn/web/guest/access-to-metadata). AVHRR Pathfinder Version 5.2 (PFV5.2) data are obtained from the US National Oceanographic Data Center and GHRSST (http://pathfinder. nodc.noaa.gov).

References

  1. Carton J A, Giese B S. 2008. A reanalysis of ocean climate using Simple Ocean Data Assimilation (SODA). Mon Wea Rev, 136(8): 2999–3017CrossRefGoogle Scholar
  2. Casey K S, Brandon T B, Cornillon P, et al. 2010. The past, present, and future of the AVHRR Pathfinder SST Program. In: Barale V, Gower J F R, Alberotanza L, eds. Oceanography from Space. Dordrecht: Springer, 273–287.CrossRefGoogle Scholar
  3. Fang Yue, Fang Guohong, Wang Kai, et al. 2001. Dynamics of the Kuroshio intrusion into the southeast China adjacent waters—A numerical study. J Hydrodynamics: Ser B, 13(3): 28–33Google Scholar
  4. Fang Yue, Fang Guohong, Yu Kejun. 1996. ADI barotropic ocean model for simulation of Kuroshio intrusion into China southeastern waters. Chin J Oceanol Limnol, 14(4): 357–366CrossRefGoogle Scholar
  5. Fang Yue, Fang Guohong, Zhang Qinghua. 2000. Numerical simulation and dynamic study of the wintertime circulation of the Bohai Sea. Chin J Oceanol Limnol, 18(1): 1–9CrossRefGoogle Scholar
  6. Fang Yue, Zhang Qinghua, Fang Guohong. 1997. A numerical study on the path and origin of the Yellow Sea Warm Current. The Yellow Sea, 3: 18–26Google Scholar
  7. Guan Bingxian. 1986. Current structure and its variation in equatorial area of the western North Pacific Ocean. Chin J Oceanol Limnol, 4(3): 239–255CrossRefGoogle Scholar
  8. Han Guijun, Li Wei, Zhang Xuefeng, et al. 2011. A regional ocean reanalysis system for coastal waters of China and adjacent seas. Adv Atmos Sci, 28(3): 682–690CrossRefGoogle Scholar
  9. He Mingxia, Ge Chen, Sugimori Y. 1995. Investigation of mesoscale fronts, eddies and upwelling in the China seas with satellite data. Global Atmos Ocean Syst, 3(4): 273–288Google Scholar
  10. Hickox R, Belkin I, Cornillon P, et al. 2000. Climatology and seasonal variability of ocean fronts in the East China, Yellow and Bohai Seas from satellite SST data. Geophys Res Lett, 27(18): 2945–2948CrossRefGoogle Scholar
  11. Huang Daji, Zhang Tao, Zhou Feng. 2010. Sea-surface temperature fronts in the Yellow and East China Seas from TRMM microwave imager data. Deep-Sea Res: Part II, 57(11–12): 1017–1024Google Scholar
  12. Ichikawa H, Beardsley R C. 2002. The current system in the Yellow and East China Seas. J Oceanogr, 58(1): 77–92CrossRefGoogle Scholar
  13. Kalnay E, Kanamitsu M, Kistler R, et al. 1996. The NCEP/NCAR 40- year reanalysis project. Bull Amer Meteor Soc, 77(3): 437–470CrossRefGoogle Scholar
  14. Kondo M. 1985. Oceanographic investigations of fishing ground in the East China Sea and the Yellow Sea: I. Characteristics of the mean temperature and salinity distributions measured at 50 m and near the bottom. Bull Seikai Reg Fish Lab, 62: 19–66Google Scholar
  15. Lin Xiaopei, Yang Jiayan. 2011. An asymmetric upwind flow, Yellow Sea Warm Current: 2. Arrested topographic waves in response to the northwesterly wind. J Geophys Res, 116(C4): C04027, doi: 10.1029/2010JC006514Google Scholar
  16. Lü Xingang, Qiao Fangli, Xia Changshui, et al. 2010. Upwelling and surface cold patches in the Yellow Sea in summer: effects of tidal mixing on the vertical circulation. Continental Shelf Research, 30(6): 620–632CrossRefGoogle Scholar
  17. Ma Jian, Qiao Fangli, Xia Changshui, et al. 2006. Effects of the Yellow Sea Warm Current on the winter temperature distribution in a numerical model. J Geophys Res, 111(C11): C11S04, doi: 10.1029/2005JC003171CrossRefGoogle Scholar
  18. Miller A J, Cayan D R, Barnett T P, et al. 1994. The 1976–77 climate shift of the Pacific Ocean. Oceanography, 7(1): 21–26CrossRefGoogle Scholar
  19. Ping Bo, Su Fenzhen, Du Yunyan, et al. 2013. Application of the model of universal gravity to oceanic front detection near the Kuroshio front. J Geo-Inf Sci (in Chinese), 15(2): 187–192Google Scholar
  20. Trenberth K E, Hurrell J W. 1994. Decadal atmosphere-ocean variations in the Pacific. Climate Dyn, 9(6): 303–309CrossRefGoogle Scholar
  21. Uppala S M, Kallberg P W, Simmons A J, et al. 2005. The ERA-40 reanalysis. Q J R Meteorol Soc, 131(131): 2961–3012CrossRefGoogle Scholar
  22. Wang Fan, Liu Chuanyu. 2009. An N-shape thermal front in the western South Yellow Sea in winter. Chin J Oceanol Limnol, 27(4): 898CrossRefGoogle Scholar
  23. Wu Yang, Cheng Guosheng, Han Guijun, et al. 2013. Analysis of seasonal and interannual variability of sea surface temperature for China seas based on CORA dataset. Haiyang Xuebao (in Chinese), 35(1): 44–54Google Scholar
  24. Xie Shangping, Hafner J, Tanimoto Y, et al. 2002. Bathymetric effect on the winter sea surface temperature and climate of the Yellow and East China Seas. Geophys Res Lett, 29(24): 81–1–81–4, doi: 10.1029/2002GL015884CrossRefGoogle Scholar
  25. Zheng Quanan, Klemas V. 1982. Determination of winter temperature patterns, fronts, and surface currents in the Yellow Sea and East China Sea from satellite imagery. Remote Sensing of Environment, 12(3): 201–218CrossRefGoogle Scholar

Copyright information

© The Chinese Society of Oceanography and Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  • Tana
    • 1
    • 2
  • Yue Fang
    • 2
    • 3
  • Baochao Liu
    • 2
  • Shuangwen Sun
    • 2
    • 3
  • Huiwu Wang
    • 2
  1. 1.College of Oceanic and Atmospheric SciencesOcean University of ChinaQingdaoChina
  2. 2.Center for Ocean and Climate Research, The First Institute of OceanographyState Oceanic AdministrationQingdaoChina
  3. 3.Laboratory for Regional Oceanography and Numerical ModelingQingdao National Laboratory for Marine Science and TechnologyQingdaoChina

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