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The accurate detection and quantification of light precipitation is problematic, particularly in the Arctic region. Satellite and ground-based observations of light precipitation are frequently underestimated at high latitudes. Remote sensing and in-situ observations from the Iqaluit, NU supersite (64oN, 69oW) were integrated to train, develop, and validate a random forest (RF) model that can diagnose precipitation type and other weather element occurrences. Observations from multiple lidars, optical disdrometers, traditional precipitation gauges and meteorological aerodrome (METAR) reports from 2015–2020 were integrated and used in the RF model development. The model was trained at Iqaluit, validated over different time periods, and applied to another region (Whitehorse, YT; 61oN, 135oW). Results indicate the importance of accurate visibility observations to train the model. Overall, the RF model was capable of distinguishing precipitation types and demonstrated the potential to be used at all sites/networks where similar automated and cost-effective instruments are already deployed (e.g. radar sites, airports with ceilometers, etc.). This would reduce the dependency on METARs while improving weather element occurrence accuracy. [Traduit par la rédaction] Une méthode d'apprentissage automatique pour intégrer les observations des supersites de l'Arctique et diagnostiquer la présence d'éléments météorologiques. La détection et la quantification précises des précipitations légères posent problème, en particulier dans la région arctique. Les observations satellitaires et terrestres des précipitations légères sont souvent sous-estimées aux hautes latitudes. La télédétection et les observations in situ du supersite d'Iqaluit, au Nunavut (64oN, 69oW) ont été intégrées pour former, établir et valider un modèle de forêt aléatoire (FA) qui peut diagnostiquer le type de précipitations et d'autres occurrences d'éléments météorologiques. Des observations provenant de multiples lidars, de disdromètres optiques, de pluviomètres traditionnels et de rapports d'aérodromes météorologiques (METAR) de 2015 à 2020 ont été intégrées et utilisées dans l'élaboration du modèle de forêt aléatoire. Le modèle a été mis à l'essai à Iqaluit, validé sur différentes périodes et appliqué à une autre région (Whitehorse, Yukon; 61oN, 135oW). Les résultats dénotent l'importance d'observations précises de la visibilité pour mettre à l'essai le modèle. Dans l'ensemble, le modèle FA a été capable de distinguer les types de précipitations et a montré qu'il pouvait être utilisé sur tous les sites/réseaux où des instruments automatisés et rentables similaires sont déjà déployés (p. ex. sites radar, aéroports dotés de céilomètres, etc.). Cela permettrait de réduire la dépendance à l'égard des METAR tout en améliorant la précision de l'occurrence des éléments météorologiques. [ABSTRACT FROM AUTHOR]

As far back as one can go--despite the word 'mission,' as we use it today, dating only to the Jesuits in the sixteenth century--the church has felt itself charged with [...]

If ever it could be said that the foundations of faith were laid in childhood, it can be said of me. I was imprinted with an Irish-American Catholic gestalt in [...]

It is common to observe that geography is no longer an ,important aspect of world mission, yet a remark made by Marshall McLuhan (1911-80)--'We look at the present through a [...]

The death of Pope John Paul II on April 2, 2005, brought to an end one of the longest pontificates in Roman Catholic history, one that began with the election [...]

In the course of my work at Orbis Books I have reached a number of conclusions about needs and opportunities that present themselves in regard to studies of mission and [...]

Classification and regression trees (CART) decision trees analysis of the Vancouver-lower Fraser River valley region, Montreal urban area, and atlantic region gave results consistent with the available data, and the rules for nodes were found to be physically realistic. The regulating role of moisture content of the air on the maximum surface ozone concentration when all other factors are high values is revealed by the analysis.

The End of Evangelicalism? Discerning a New Faithfulness for Mission; Towards an Evangelical Political Theology. By David E. Fitch. Eugene, Ore.: Cascade Books, 2011. Pp. xxvi, 226. Paperback $28. The [...]

Mission: Collision or Dialogical Encounter? A Chronicle of St. Paul's Parish, Yobai, Papua New Guinea. By Ennio Mantovani, S.V.D. Nettetal, Ger.: Steyler Verlag, 2011. Pp. 475. 30.70 [euro]. In Mission: [...]

Apostolic Religious Life in America Today: A Response to the Crisis. Edited by Richard Gribble. Washington, D.C.: Catholic Univ. of America Press, 2011. Pp. xi, 169. Paperback $19.95. The essays [...]

Catholics in Indonesia: A Documented History. Vol. 1: A Modest Recovery, 1808- 1903; vol. 2: The Spectacular Growth of a Self-Confident Minority, 1903-1942. By Karel Steenbrink. Leiden: KITLV, 2003-7. Vol. [...]

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Domesticating a Religious Import: The Jesuits and the Inculturation of the Catholic Church in Zimbabwe, 1879-1980. By Nicholas M. Creary. New York: Fordham Univ. Press, 2011. Pp. xv, 339. $48. [...]

Culture, Inculturation, and Theologians: A Postmodern Critique. By Gerald A. Arbuckle. Collegeville, Minn.: Liturgical Press, 2010. Pp. xxiv, 200. Paperback $24.95., In Culture, Inculturation, and Theologians, the distinguished Marist anthropologist Gerald Arbuckle returns to themes he traced in his 1990 book Earthing the Gospel. But where his former book was a [...]

God's Entrepreneurs: How Irish Missionaries Tried to Change the World. By Joe Humphreys. Dublin: New Island Books, 2010. Pp. xviii, 246. Paperback 13.99 [euro]/$26.95. Joe Humphreys, an Irish Times staff [...]

Jesuit on the Roof of the World: Ippolito Desideri's Mission to Tibet. By Trent Pomplun. New York: Oxford Univ. Press, 2010. Pp. xvi, 302. $29.95. Trent Pomplun's account of Ippolito [...]

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