Rein Ahas

Rein Ahas (10 December 1966 – 18 February 2018)[1] was an Estonian geographer and a professor at the University of Tartu.

In 1991 he received his undergraduate degree in Physical Geography and Nature Conservation from the University of Tartu, in 1994 he completed his MSc and in 1999 his PhD, with the thesis "Spatial and Temporal Variability of Phenological Phases in Estonia", supervised by Prof. Ülo Mander and Jaan Eilart.

[2] visiting researcher His research topics included spatial mobility of people, travel, urban geography and segregation, with special interest on using and developing mobile positioning based methods.

[4] On 18 February 2018, Ahas collapsed while competing in the Tartu Ski Marathon.

He was resuscitated by fellow skiers and taken to the University of Tartu Hospital, where he died of what was determined to be a heart attack, aged 51.