[Climate Dynamics]Southern European summer rainfall enhances and reshapes the circumglobal teleconnection pattern

Recently, based on observational evidences and simulation results with a barotropic vorticity equation model and a linear baroclinic model, Lin et al. (2016, 2017) pointed out that summer rainfall in Southern Europe can also feed back to and strengthen the CGT pattern. Moreover, they further showed that in early summer, the southern European rainfall may also reshape the CGT pattern, forming an addition high-latitude wave train in addition to the mid-latitude wave train (Figure 1). Their studies provide an alternative mechanism for the formation and maintenance of the CGT.

Figure 1: Schematic diagram illustrating mechanism of the CGT. The red circles reflect effect of the enhanced Indian rainfall and the blue circles depict effect of the reduced Southern European rainfall, in which the high-latitude wave train consisting of three blue circles over northern Europe is only valid in early summer.

Citation:

Lin, Z.D., and R.Y. Lu, 2016: Impact of summer rainfall over southern-central Europe on circumglobal teleconnection. Atmos. Sci. Let., 17, 258-262, doi: 10.1002/asl.652.
Download: http://onlinelibrary.wiley.com/doi/10.1002/asl.652/full

Lin, Z.D., F. Liu, B. Wang, R.Y. Lu, and X. Qu, 2017: Southern European rainfall reshapes the early-summer circumglobal teleconnection after the late 1970s. Clim. Dyn., doi: 10.1007/s00382-016-3306-1.
Download: https://link.springer.com/article/10.1007/s00382-016-3306-1

Contact: Zhongda Lin, zdlin@mail.iap.ac.cn