Decreasing Duration of Freeze-Up as Related to the Warming of the Climate

摘要

The climatic warming effect on the ice-cycle of the Neva River at Leningrad is investigated. Observations of the break-up and freeze-up of the river have been made interruptedly from the day the city was founded. The results of processing this material and the calculated deviations from the norm for each decade are given in tabular form.