It is suggested that the correlation works on a centennial scale, due to the system's high thermal inertia..with the smoking gun being the fact that oceanic temperatures feature a very strong correlation with solar activity on a 20yr resolution, over the past several hundred years
A recent study demonstrates the existence of significant resonance cycles and high correlations between solar activity and the Earth's averaged surface temperature during centuries. This provides a new clue to reveal the phenomenon of global warming in recent years.
Their work, entitled "Periodicities of solar activity and the surface temperature variation of the Earth and their correlations" was published in CHINESE SCIENCE BULLETIN (In Chinese) 2014 No.14 with the co-corresponding authors of Dr. Zhao Xinhua and Dr. Feng Xueshang from State key laboratory of space weather, CSSAR/NSSC, Chinese Academy of Sciences. It adopts the wavelet analysis technique and cross correlation method to investigate the periodicities of solar activity and the Earth's temperature as well as their correlations during the past centuries.
The link provided—within the article that you've cited—is in fact to an original "Chinese" language version of the paper, cited. … Pity that we've been given only the impressions of whomever put together this article.
— Some basic cyclical correlation, possibly supporting a more specific connection, is all I'm seeing in what's shown and described within the article looked at more in particularly.