h/t to Tom Nelson
From the paper:
The periodicities recognized in our study resemble the ones associated to the QuasiBiennial Oscillation, the El Nino Southern Oscillation, the sunspot number solar cycle and, interestingly, the 9 year periodicity related to a lunisolar tidal cycle. All of these represent the main climate forcing mechanisms that regulated temperature and precipitation in the Mediterranean in the past 500 years (Camuffo et al. 2010; Scafetta 2010, 2012a; Wang et al. 2012). We suggest that during the MSC, at least during the insolation minima when evaporites precipitated, the Mediterranean did not have a constant hydrological budget but was rather characterized by a highly dynamic climate. In such a dynamic scenario the conditions of the Mediterranean seasonally switched between oversaturated evaporative and diluted non-evaporative conditions. This implies that, even during insolation minima, evaporitic conditions were achieved and lasted only for short time intervals (i.e., at seasonal scale) and not for the entire duration of the arid portion of the insolation cycle.
Moreover, we suggest that the role of astronomical high-frequency forcing, as from lunar and solar periodicities, can be reasonably extended back to the late Miocene, or maybe even to more ancient periods, as demonstrated for the longer-term ones (precession, obliquity, eccentricity), because they are independent of local factors such as basin physiography and ocean and atmospheric circulation.