Christian Jost is a French geographer.
Jost was Director of the Geographical Research Center at Paul Verlaine University – Metz, then joined the University of New Caledonia in 1993, and later the University of French Polynesia in Tahiti, where he is Professor of Geography and Development and dean of the Faculty of Human Sciences, Languages and Literature.
Although the author of over 100 scientific papers on various subjects, Jost is particularly associated with Clipperton Island. Surveys he made there in 1997 and 2001 (confirmed in 2005) established that Clipperton is the largest colony of masked boobies in the world, with 110,000 individuals at that time. Jost was a member of SURPACLIP, Viviane Solis-Weiss's 1997 Franco—Mexican oceanographic expedition to Clipperton (a joint venture of the National Autonomous University of Mexico and the University of New Caledonia), then led the 2001 follow-up expedition Passion 2001, which provided updated data on the geography, environment, water resources and management constraints of the atoll.
Jost has also researched and written on other aspects of geography and ecology of the Pacific Ocean, and has worked, studied, and traveled extensively in Africa and Asia.Christian Jost, ed. (1998). The French-Speaking Pacific: Population, Environment and Development Issues. Boombana. ISBN 1876542020. (in English)
Jost, C.H.; Andrefouet, S. (2006). "Long term natural and human perturbations and current status of Clipperton Atoll, a remote island of the Eastern Pacific" (PDF). Pacific Conservation Biology. Surrey Beatty & Sons Pty Ltd. 12 (3): 207–218. Retrieved November 17, 2013. (in English)
Jost, C.H. (July 2005). "Risques environnementaux et enjeux à Clipperton (Pacifique français)" [Environmental risks and challenges to Clipperton (French Pacific)]. Cybergeo: revue européenne de géographie / European journal of geography. Retrieved November 17, 2013. (in French)
Jost, C.H. (June–December 2005). "Bibliographie de l'île de Clipperton, île de La Passion (1711–2005)" [Bibliography of Clipperton Island, Passion Island (1711–2005)] (PDF). Journal de la Société des Océanistes: 181–197. Retrieved November 17, 2013. (in French)
Lebigre, Jean-Michel; Decoudras, Pierre-Marie, eds. (2003). "Clipperton - Île de la Passion : Une aire française du Pacifique à protéger!" [Clipperton Island - Passion Island: A French Pacific area to protect!]. Les aires protégées insulaires et tropicales [Tropical Islands and Protected Areas] (PDF). Presses Universitaires de Bordeaux. ISBN 9782905081452. Retrieved November 17, 2013. (given at the Symposium Aires protégées insulaires et littorales tropicales [Protected Islands and Coastal Tropical Areas], Nouméa (New Caledonia), October 30 and 31 October 2001)(in French)
Lille, Didier; Jost, Christian. "A Decision Support System for Water Resource Management in Lifou Island, New-Caledonia" (PDF). 10th Australasian Remote Sensing and Photogrammetry Conference. Archived from the original (PDF) on May 25, 2010. Retrieved November 17, 2013. (in English)
Jost, Christian (2004). Clipperton - Ile de La Passion [Clipperton - Passion Island] (video). Paris: Editions CDPNC Noumea/SCEREN. (in French)
Christian Jost. "L'île de La Passion alias Clipperton" [Passion Island, alias Clipperton]. Retrieved November 17, 2013. (in French)