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    Meteorological Implications of the First Voyage of Christopher Columbus

    Source: Bulletin of the American Meteorological Society:;1992:;volume( 073 ):;issue: 002::page 173
    Author:
    Cerveny, Randall S.
    ,
    Hobgood, Jay S.
    DOI: 10.1175/1520-0477(1992)073<0173:MIOTFV>2.0.CO;2
    Publisher: American Meteorological Society
    Abstract: The log of the first voyage of Christopher Columbus to the New World provides valuable information on the meteorological conditions of September 1492. Comparison and analysis of the descriptive accounts of weather made by Columbus and his pilots to other available Columbian and modern data leads to two distinct perspectives on the Columbian voyage: an examination of the frequency of ?calm? events, and an analysis of the lack of tropical storm activity. The major conclusions of the first portion of the study include: 1) The Columbian pilots' descriptions of ?cairns? related to travel slower than travel occurring during other portions of the voyage. That rate of travel compares favorably to calm winds and an oceanic current of 0.4 knots, a value close to modern-day values; 2) The frequency of ?calm? events experienced by Christopher Columbus in 1492 is significantly higher than the most liberal estimates of calms in the North Atlantic over the last 100 years; and 3) The locations of the Columbian calms are generally in the same region currently experiencing the highest frequency of calms. The main finding of the second portion of the study is that, based on historical hurricane records from 1886 to 1989, the center of a hurricane would have passed within 100 km of Columbus only once in the past 104 years. Inclusion of tropical storms increases this number to four out of 104 years. Therefore, while Columbus may indeed have been fortunate to have avoided severe weather during his voyage, the odds decidedly were in his favor. This Columbian ?weather luck? was due to a combination of 1) encountering abnormally strong anticyclonic flow over the eastern North Atlantic, 2) starting late enough in the hurricane season to significantly decrease the probability of experiencing a hurricane, and 3) taking a north and easterly voyage, thereby avoiding the area of maximum hurricane occurrence.
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      Meteorological Implications of the First Voyage of Christopher Columbus

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4161053
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    • Bulletin of the American Meteorological Society

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    contributor authorCerveny, Randall S.
    contributor authorHobgood, Jay S.
    date accessioned2017-06-09T14:40:59Z
    date available2017-06-09T14:40:59Z
    date copyright1992/02/01
    date issued1992
    identifier issn0003-0007
    identifier otherams-24387.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4161053
    description abstractThe log of the first voyage of Christopher Columbus to the New World provides valuable information on the meteorological conditions of September 1492. Comparison and analysis of the descriptive accounts of weather made by Columbus and his pilots to other available Columbian and modern data leads to two distinct perspectives on the Columbian voyage: an examination of the frequency of ?calm? events, and an analysis of the lack of tropical storm activity. The major conclusions of the first portion of the study include: 1) The Columbian pilots' descriptions of ?cairns? related to travel slower than travel occurring during other portions of the voyage. That rate of travel compares favorably to calm winds and an oceanic current of 0.4 knots, a value close to modern-day values; 2) The frequency of ?calm? events experienced by Christopher Columbus in 1492 is significantly higher than the most liberal estimates of calms in the North Atlantic over the last 100 years; and 3) The locations of the Columbian calms are generally in the same region currently experiencing the highest frequency of calms. The main finding of the second portion of the study is that, based on historical hurricane records from 1886 to 1989, the center of a hurricane would have passed within 100 km of Columbus only once in the past 104 years. Inclusion of tropical storms increases this number to four out of 104 years. Therefore, while Columbus may indeed have been fortunate to have avoided severe weather during his voyage, the odds decidedly were in his favor. This Columbian ?weather luck? was due to a combination of 1) encountering abnormally strong anticyclonic flow over the eastern North Atlantic, 2) starting late enough in the hurricane season to significantly decrease the probability of experiencing a hurricane, and 3) taking a north and easterly voyage, thereby avoiding the area of maximum hurricane occurrence.
    publisherAmerican Meteorological Society
    titleMeteorological Implications of the First Voyage of Christopher Columbus
    typeJournal Paper
    journal volume73
    journal issue2
    journal titleBulletin of the American Meteorological Society
    identifier doi10.1175/1520-0477(1992)073<0173:MIOTFV>2.0.CO;2
    journal fristpage173
    journal lastpage178
    treeBulletin of the American Meteorological Society:;1992:;volume( 073 ):;issue: 002
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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