Changes

The '''Roman Warm Period''' was a period of unusually warm weather that ran from approximately 250 BC to 400 AD.<ref name="Desprat"/> Temperatures were approximately 1 degree Celsius warmer than today, according to a study of tree ring data.<ref name=Esper>"[http://www.highbeam.com/doc/1G1-296111197.html No wonder the Romans could go out in togas during winter]", ''Daily Mail'' (London), July 12, 2012<br/>Jan Esper, David C. Frank, Mauri Timonen, Eduardo Zorita, Rob J. S. Wilson, Jürg Luterbacher, Steffen Holzkämper, Nils Fischer, Sebastian Wagner, Daniel Nievergelt, Anne Verstege & Ulf Büntgen, "[http://www.nature.com/nclimate/journal/v2/n12/full/nclimate1589.html Orbital forcing of tree-ring data]", Nature Climate Change 2, 862–866 (2012)</ref> There was a particularly warm period extending from 21 to 50 AD.<ref name=Esper/> Various proxies have been proposed as evidence for the Roman Warm Period, such as the Roman introduction of vineyards into Britain.

The '''Roman Warm Period''' was a period of unusually warm weather that ran from approximately 250 BC to 400 AD.<ref name="Desprat"/> Temperatures were approximately 1 degree Celsius warmer than today, according to a study of tree ring data.<ref name=Esper>"[http://www.highbeam.com/doc/1G1-296111197.html No wonder the Romans could go out in togas during winter]", ''Daily Mail'' (London), July 12, 2012<br/>Jan Esper, David C. Frank, Mauri Timonen, Eduardo Zorita, Rob J. S. Wilson, Jürg Luterbacher, Steffen Holzkämper, Nils Fischer, Sebastian Wagner, Daniel Nievergelt, Anne Verstege & Ulf Büntgen, "[http://www.nature.com/nclimate/journal/v2/n12/full/nclimate1589.html Orbital forcing of tree-ring data]", Nature Climate Change 2, 862–866 (2012)</ref> There was a particularly warm period extending from 21 to 50 AD.<ref name=Esper/>

Olive presses have been found in the Roman city of Sagalassos in [[Anatolia]], although as of 2000 it was too cold to grow olives in this area of southwestern [[Turkey]].<ref name="Scheidel19">Scheidel, Morris Saller (2007), p. 19</ref>

Various proxies have been proposed as evidence for the Roman Warm Period, such as the Roman introduction of vineyards into Britain. Olive presses have been found in the Roman city of Sagalassos in [[Anatolia]], although as of 2000 it was too cold to grow olives in this area of southwestern [[Turkey]].<ref name="Scheidel19">Scheidel, Morris Saller (2007), p. 19</ref>

Theophrastus (371 – c. 287 BC) wrote that date trees could grow in Greece if planted, but could not set fruit there. This is the same situation as today, and suggests that southern Aegean mean summer temperatures in the fourth and fifth centuries BC were within a degree of modern temperatures. This and other literary fragments from the time confirm that the Greek climate during that period was basically the same as it was around 2000 AD. Dendrochronological evidence from wood found at the [[Parthenon]] shows variability of climate in the fifth century BC resembling the modern pattern of variation.<ref name="Scheidel17">{{harvnb|Scheidel|Morris|Saller|2007|p=17}}</ref> Tree rings from Italy in the late third century BC indicate a period of mild conditions in the area at the time that [[Hannibal]] crossed the Alps with elephants.<ref name="Scheidel18">Scheidel, Morris Saller (2007), p. 18}}</ref>

Theophrastus (371 – c. 287 BC) wrote that date trees could grow in Greece if planted, but could not set fruit there. This is the same situation as today, and suggests that southern Aegean mean summer temperatures in the fourth and fifth centuries BC were within a degree of modern temperatures. This and other literary fragments from the time confirm that the Greek climate during that period was basically the same as it was around 2000 AD. Dendrochronological evidence from wood found at the [[Parthenon]] shows variability of climate in the fifth century BC resembling the modern pattern of variation.<ref name="Scheidel17">{{harvnb|Scheidel|Morris|Saller|2007|p=17}}</ref> Tree rings from Italy in the late third century BC indicate a period of mild conditions in the area at the time that [[Hannibal]] crossed the Alps with elephants.<ref name="Scheidel18">Scheidel, Morris Saller (2007), p. 18}}</ref>

==References==

==References==

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[[Category:Climate history]]

[[Category:Climate history]]

[[Category:Roman Empire]]

[[Category:Roman Empire]]