Bondarenko O.V., Evstigneeva T.A., Zhmerenetsky A.A., Allaguvatova R.Z., Utescher T.
Bulletin of the North-East scientific center 2024; (1): 14-25
Data for reconstruction include 48 palynofloras from the East Asia’s Lower Eocene continental deposits from 75° to 19° N. The climatic inferences obtained are consistent with global trends, showing high values of mean annual temperature (MAT) and mean annual precipitation (MAP). According to our results, there is a weakly expressed latitudinal temperature gradient from the north to the south, showing an increasing trend for MAT values, while a very weakly expressed latitudinal gradient of precipitation demonstrates a decreasing trend for MAP values. Based on MAT and MAP values, three regional climatic zones are distinguished. The warm moderate climate zone (north of ~ 55° paleolatitude) is characterized by low values for temperature (14.2-16.2 °C) and high ones for precipitation (1158-1334 mm). In the transition zone (~ 45-55° paleolatitude), MAT values vary from 15.9 to 19.0 °C, and MAP values range from 874 to 1352 mm. The subtropical climate zone (south of ~ 45° paleolatitude) is characterized by high values for temperature (16.5-19.1 °C) and low, for precipitation (874-1263 mm).
