Furacán: Diferenzas entre revisións

A maioría dos furacáns fórmanse nunha faixa próxima ao [[ecuador]], chamada Fronte Intertropical (ITF), [[Intertropical Convergence Zone]] (ITCZ) ou faixa dos monzóns.<ref name="MMG">{{cite web|url=http://www.knmi.nl/~koek/glossary.html#I|title=Marine Meteorological Glossary|author= Korek, Fritz |date=November 21, 2000|publisher=Marine Knowledge Centre|accessdate=May 6, 2009}}</ref><ref name="PAGASA">{{cite web|url=http://kidlat.pagasa.dost.gov.ph/genmet/tropicalcyclone/formation_of_cyclone.html |title=Formation of Tropical Cyclones |year=2008 |publisher=[[Philippine Atmospheric, Geophysical and Astronomical Services Administration]] |accessdate=May 6, 2009 |deadurl=unfit |archiveurl=https://web.archive.org/web/20120902074341/http://kidlat.pagasa.dost.gov.ph/genmet/tropicalcyclone/formation_of_cyclone.html |archivedate=September 2, 2012 }}</ref><ref name="MILLER7">{{cite web|author=DeCaria, Alex|work=ESCI 344&nbsp;– Tropical Meteorology|publisher=[[Millersville University of Pennsylvania|Millersville University]]|url=http://snowball.millersville.edu/~adecaria/ESCI344/esci344_lesson05_TC_climatology.html|archiveurl=https://web.archive.org/web/20080507051727/http://snowball.millersville.edu/~adecaria/ESCI344/esci344_lesson05_TC_climatology.html|archivedate=May 7, 2008|title=Lesson 5&nbsp;– Tropical Cyclones: Climatology.|year=2005|accessdate=February 22, 2008}}</ref> Outra importante fonte de inestabilidade atmosférica atópase nas ondas tropicais, que contribúen ao desenvolvemento de arredor do 85&nbsp;% dos furacáns intensos no océano Atlántico e na maioría dos do Pacífico oriental.<ref name="MWR Avila 1995">{{Cite journal | doi = 10.1175/1520-0493(1995)123<0887:ATSO>2.0.CO;2| title = Atlantic Tropical Systems of 1993| journal = Monthly Weather Review| volume = 123| issue = 3| pages = 887–896| year = 1995| last1 = Avila | first1 = L. A. | last2 = Pasch | first2 = R. J. |bibcode = 1995MWRv..123..887A }}</ref><ref name="AOML FAQ A4">{{cite web|author=Atlantic Oceanographic and Meteorological Laboratory, Hurricane Research Division |title=Frequently Asked Questions: What is an easterly wave? |publisher=[[National Oceanic and Atmospheric Administration]] |accessdate=July 25, 2006 |url=http://www.aoml.noaa.gov/hrd/tcfaq/A4.html |deadurl=yes |archiveurl=https://web.archive.org/web/20060718105909/http://www.aoml.noaa.gov:80/hrd/tcfaq/A4.html |archivedate=July 18, 2006 |df=mdy }}</ref><ref name="Landsea 1993">{{Cite journal | doi = 10.1175/1520-0493(1993)121<1703:ACOIMA>2.0.CO;2| title = A Climatology of Intense (or Major) Atlantic Hurricanes| journal = Monthly Weather Review| volume = 121| issue = 6| pages = 1703–1713| year = 1993| last1 = Landsea | first1 = C. W. |bibcode = 1993MWRv..121.1703L }}</ref> A maioría dos furacáns fórmanse entre os 10 e os 30 graos de latitude,<ref>{{Cite journal | doi = 10.1175/JCLI-D-11-00647.1| title = Tropical Cyclone Climatology of the South Pacific Ocean and Its Relationship to El Niño–Southern Oscillation| journal = Journal of Climate| volume = 25| issue = 18| pages = 6108–6122| year = 2012| last1 = Dowdy | first1 = A. J. | last2 = Qi | first2 = L. | last3 = Jones | first3 = D. | last4 = Ramsay | first4 = H. | last5 = Fawcett | first5 = R. | last6 = Kuleshov | first6 = Y. }}</ref> e o 87&nbsp;% fórmase non máis lonxe dos 20 graos norte ou sur.<ref name=BOMmap>{{cite web|work=Global Guide to Tropical Cyclone Forecasting|publisher=[[Bureau of Meteorology]]|url=http://www.cawcr.gov.au/publications/BMRC_archive/tcguide/ch1/figures_ch1/figure1.9.htm|title=Worldwide Tropical Cyclone Tracks 1979–88|author=Neumann, Charles J|accessdate=December 12, 2006}}</ref><ref name=post-ipcc>{{cite web|url=http://www.aoml.noaa.gov/hrd/Landsea/IPCC/index.html|title=Tropical Cyclones and Global Climate Change: A Post-IPCC Assessment|author=Henderson-Sellers|date=October 8, 2002|publisher=[[National Oceanic and Atmospheric Administration]]|accessdate=May 7, 2009|display-authors=etal}}</ref> Debido a que o [[efecto Coriolis]] inicia e mantén a súa rotación, os furacáns poucas veces se forman ou moven a 5 graos do Ecuador, onde o efecto é feble.<ref name="BOMmap"/> Con todo, é posible que se nesas áreas como os que tiveron lugar en 2001 e 2004.<ref name="GP1201">{{cite web|url=http://australiasevereweather.com/cyclones/2002/summ0112.htm|title=Monthly Global Tropical Cyclone Summary, December 2001|work=Gary Padgett|publisher=Australian Severe Weather Index|accessdate=May 6, 2009}}</ref><ref name="JTWC ATCR 2004">{{cite web|url=http://www.usno.navy.mil/NOOC/nmfc-ph/RSS/jtwc/atcr/2004atcr.pdf|title=Annual Tropical Cyclone Report 2004|year=2006|publisher=[[Joint Typhoon Warning Center]]|accessdate=6-5-2009}}</ref>

No norte do [[océano Atlántico]], a tempada de furacáns ten lugar entre o 1 de xuño e o 30 de novembro, acadando o pico a dende finais de agosto ata setembro.<ref name="AOML FAQ G1">{{cite web|author=[[Atlantic Oceanographic and Meteorological Laboratory]], Hurricane Research Division |title=Frequently Asked Questions: When is hurricane season? |publisher=[[National Oceanic and Atmospheric Administration]] |accessdate=July 25, 2006 |url=http://www.aoml.noaa.gov/hrd/tcfaq/G1.html |deadurl=yes |archiveurl=http://www.webcitation.org/5gYGdo8A6?url=http%3A%2F%2Fwww.aoml.noaa.gov%2Fhrd%2Ftcfaq%2FG1.html |archivedate=May 5, -5-2009 |df=mdy }}</ref> O pico estatístico é o 10 de setembro. No nordés do [[océano Pacífico]] ten un período de actividade máis amplo mais na mesma época do ano que no Atlántico.<ref name="NHC Atl climatology">{{cite web|author=McAdie, Colin|publisher=National Hurricane Center|title=Tropical Cyclone Climatology|url=http://www.nhc.noaa.gov/climo/|date=May 10, 2007|accessdate=June 9, 2007}}</ref> No noroeste do Pacífico os furacáns teñen lugar todo o ano, cun mínimo en febreiro e marzo e un máximo en setembro.<ref name="AOML FAQ G1"/>