This page contains specific information about Giant Sequoia (Sequoiadendron giganteum) '12175', which can be found in the forêt domaniale de Ribeauvillé in Ribeauvillé." The giant sequoia was planted March 19, 1856 by Brigadier Denny, to celebrate the birth of the Prince Imperial, son of Napoleon III and Empress Eugenie. It was, according to an order of the prefect, to perpetuate " thanksgiving returned to Providence for having, by the birth of the Prince Imperial, filled the wishes of the French giving a new guarantee for the future and prosperity the country " "
The growth rate shown in the table shows the yearly average increase in girth since the last measurement. This value only gives an indication of the growth rate, since every measurement could be done at slightly different heights and during different periods of the year.
Each measurement can be have been done with varying accuracy.
http://documents.irevues.inist.fr/bitstream/handle/2042/25898/RFF_1988_4_331.pdf?sequence=1
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The group tries to climb in the tallest trees by continent and assist scientific missions.
http://www.enquetedarbres.org/index.php?page=reseau
Pictures and resume of the climbing : http://www.petzl.com/fr/pro/news/sur-terrain/2013/07/19/en-quete-darbre-visite-arboricole-en-alsace?utm_source=facebook.com&utm_medium=petzl-page&utm_campaign=&utm_content=fr
Girth growth rate
The girth was measured more than once:| Year | Girth @1.3 m | Girth @1.5 m | Measurement | Girth growth rate |
| 1987 | ? | 4.15 m | xandru | - |
| 2012 | 4.74 m | ? | xandru | - |
| 2013 | ? | 4.76 m | Sisley | - |
| 2014 | 4.96 m | ? | Karlheinz | - |
| 2019 | 5 m | ? | Karlheinz | 0.8 cm/year |
Height
The height was measured more than once:| Year | Height | Measurement | Measurement method |
| 2012-04-28 | ~57 m | xandru | Measurement on a photo |
| 2013-06-20 | 57.70 m | Laurent Pierron & Jérémie Thomas | Climbing with direct tape drop |
| 2014-07-01 | 56.30 m | Karlheinz | Laser with Two-point measurement (e.g. Nikon Forestry 550/Pro) - sine method |
| 2015-03-26 | 56.30 m | Karlheinz | Laser with Two-point measurement (e.g. Nikon Forestry 550/Pro) - sine method |
| 2015-07-21 | 57.70 m | Marc Meyer | Climbing with direct tape drop |
| 2019-04-12 | 56.70 m | Karlheinz | Laser with Two-point measurement (e.g. Nikon Forestry 550/Pro) - sine method |
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Photos
The photos are provided by Marc Meyer, Sisley, Karlheinz, and xandru.
25th of September 2013
25th of April 2013
20th of May 2013
25th of September 2013
25th of September 2013
