quinta-feira, 4 de setembro de 2008

Ciclones tropicais estão se fortalecendo, diz estudo


da Efe, em Londres


Os mais fortes ciclones tropicais estão ganhando intensidade, principalmente na metade norte dos oceanos Atlântico e Índico, segundo uma pesquisa publicada nesta quarta-feira pela revista científica britânica "Nature".

A elevação da temperatura na superfície dos oceanos faz com que aumentem as velocidades máximas do vento dos ciclones mais fortes.


Uma equipe de pesquisadores da Florida State University (Estados Unidos) liderada por James Elsner analisou os dados gerados por satélite sobre ciclones nos últimos 25 anos. A partir deles, descobriram que o recente aumento da temperatura das superfícies do Atlântico Norte tropical está fortalecendo os ciclones na região.

Os autores do estudo afirmam que o aumento da temperatura da superfície do oceano em 1ºC faz com que cresça em 31% a freqüência global dos ciclones mais violentos.
Além disso, explicam que, quanto mais forte for o ciclone, mais evidente é a mudança na velocidade de seus ventos. Com exceção do Oceano Pacífico Sul, todas as bacias oceânicas mostram isso, embora não no mesmo grau: os maiores aumentos se dão no Atlântico Norte e no norte do Índico.

Os pesquisadores explicam que no resto dos trópicos as tendências na intensidade dos ciclones são menos evidentes. Neste sentido, reconhecem que calcular as tendências em outras zonas dos trópicos foi difícil devido à falta de dados.

Os cientistas concluem que estes resultados vão ao encontro da teoria do motor térmico da intensidade dos ciclones: à medida que os mares se aquecem, o oceano tem maior energia que pode ser liberada sob a forma de ventos ciclônicos.

No entanto, advertem de que ainda há uma grande falta de dados disponíveis e que o estudo não inclui outros fatores importantes, como a origem e a duração do ciclone, a proximidade com a terra, as condições do fenômeno El Niño e a atividade solar. Fonte: Folha de São Paulo

14 comentários:

Anônimo disse...

[u][b]Xrumer[/b][/u]

[b]Xrumer SEO Professionals

As Xrumer experts, we have been using [url=http://www.xrumer-seo.com]Xrumer[/url] quest of a sustained leisure conditions and grasp how to harness the colossal power of Xrumer and go off it into a Bills machine.

We also purvey the cheapest prices on the market. Diverse competitors will cost 2x or square 3x and a destiny of the opportunity 5x what we pervade you. But we have faith in providing prominent service at a low affordable rate. The whole incidental of purchasing Xrumer blasts is because it is a cheaper surrogate to buying Xrumer. So we aim to keep that contemplating in rebuke and outfit you with the cheapest rate possible.

Not simply do we cause the greatest prices but our turnaround occasion for your Xrumer posting is super fast. We compel pull someone's leg your posting done in the forefront you know it.

We also provide you with a sated log of affluent posts on different forums. So that you can catch a glimpse of seeking yourself the power of Xrumer and how we get harnessed it to help your site.[/b]


[b]Search Engine Optimization

Using Xrumer you can think to distinguish thousands upon thousands of backlinks over the extent of your site. Tons of the forums that your Site you will be posted on have acute PageRank. Having your join on these sites can truly serve establish up some top grade endorse links and as a matter of fact riding-boot your Alexa Rating and Google PageRank rating via the roof.

This is making your put more and more popular. And with this better in popularity as familiarly as PageRank you can envisage to witness your place in effect rank high in those Search Engine Results.
Conveyance

The amount of see trade that can be obtained by harnessing the power of Xrumer is enormous. You are publishing your locality to tens of thousands of forums. With our higher packages you may regular be publishing your site to HUNDREDS of THOUSANDS of forums. Visualize 1 mail on a all the rage forum last will and testament almost always get 1000 or so views, with communicate 100 of those people visiting your site. Modern create tens of thousands of posts on celebrated forums all getting 1000 views each. Your shipping ordain withdraw sometimes non-standard due to the roof.

These are all targeted visitors that are interested or exotic nearly your site. Imagine how innumerable sales or leads you can succeed in with this great loads of targeted visitors. You are truly stumbling upon a goldmine bright to be picked and profited from.

Remember, Traffic is Money.
[/b]

BECOME ENTHUSIASTIC ABOUT YOUR CHEAP BURST TODAY:


http://www.xrumer-seo.com

Anônimo disse...

[B]NZBsRus.com[/B]
No More Crawling Downloads With NZB Downloads You Can Instantly Find High Quality Movies, Console Games, MP3 Albums, Applications & Download Them @ Fast Speeds

[URL=http://www.nzbsrus.com][B]Usenet Search[/B][/URL]

Anônimo disse...

Spread Our Heavy-hearted Prices at www.Pharmashack.com, The Unequalled [b][url=http://www.pharmashack.com]Online Chemist's workshop [/url][/b] To [url=http://www.pharmashack.com]Buy Viagra[/url] Online ! You Can also Gull instead of granted Cavernous Deals When You [url=http://www.pharmashack.com/en/item/cialis.html]Buy Cialis[/url] and When You You [url=http://www.pharmashack.com/en/item/levitra.html]Buy Levitra[/url] Online. We Also Be struck at any time a immediately a Thought-provoking Generic [url=http://www.pharmashack.com/en/item/phentermine.html]Phentermine[/url] As a employees to Your Nutriment ! We Further Swap signpost [url=http://www.pharmashack.com/en/item/viagra.html]Viagra[/url] and Also [url=http://www.pharmashack.com/en/item/generic_viagra.html]Generic Viagra[/url] !

Anônimo disse...

Possession casinos? digging this pacific saturated behind the ears [url=http://www.realcazinoz.com]casino[/url] exemplar and wing it denigrate online casino games like slots, blackjack, roulette, baccarat and more at www.realcazinoz.com .
you can also oversee our untested [url=http://freecasinogames2010.webs.com]casino[/url] prone at http://freecasinogames2010.webs.com and upon accurately folding change !
another concurrent [url=http://www.ttittancasino.com]casino spiele[/url] part is www.ttittancasino.com , in comeuppance german gamblers, indite in unrestrained online casino bonus.

Anônimo disse...

It isn't hard at all to start making money online in the underground world of [URL=http://www.www.blackhatmoneymaker.com]blackhat world[/URL], Don’t feel silly if you haven’t heard of it before. Blackhat marketing uses little-known or not-so-known methods to generate an income online.

cheap generic viagra disse...

Your blog is outrageous! I mean, Ive never been so entertained by anything in my life! Your vids are perfect for this. I mean, how did you manage to find something that matches your style of writing so well? Im really happy I started reading this today. Youve got a follower in me for sure!

viagra disse...

Hello, i think that this post is very good, i would like to read more about it

Anônimo disse...


viagra, [url=http://community.babycenter.com/journal/bath0locust/8116147/viagra]viagra[/url],

http://community.babycenter.com/journal/bath0locust/8116147/viagra

viagra, [url=http://www.purevolume.com/beggar43apple/posts/3212920/viagra+online+without+prescription]viagra[/url],

http://www.purevolume.com/beggar43apple/posts/3212920/viagra+online+without+prescription

viagra, [url=http://kitty2rabbi.xanga.com/770244885/viagra/]viagra[/url],

http://kitty2rabbi.xanga.com/770244885/viagra/

viagra, [url=http://stage7sock.posterous.com/viagra-online-without-prescription]viagra[/url],

http://stage7sock.posterous.com/viagra-online-without-prescription

viagra, [url=http://east7field.exteen.com/20121208/viagra]viagra[/url],

http://east7field.exteen.com/20121208/viagra

Anônimo disse...

http://site.ru - [url=http://site.ru]site[/url] site
site

Anônimo disse...


Oxycodone [url=http://www.oxycodoneonlinepharmacy.com] Online Oxycodone[/url]http://www.oxycodoneonlinepharmacy.com
Valium[url=http://www.valium.ms]Valium[/url]http://www.valium.ms
Generic Cialis[url=http://www.genericcialis.ws]Generic Cialis[/url]http://www.genericcialis.ws
cialis[url=http://www.buyonlinecialisrx.com] Buy Cialis [/url]http://www.buyonlinecialisrx.com

Anônimo disse...

Hey! I simply wish to give an enormous thumbs
up for the good information you may have right here on this post.
I can be coming back to your blog for extra soon.

My website :: top 10 seo company in delhi

Anônimo disse...

Hey! I just would like to give an enormous thumbs up for the good
data you’ve here on this post. I might be coming
back to your weblog for extra soon.

my blog post; semen color

Anônimo disse...

Hi there! I just would like to give a huge thumbs up for the great information you will have here on
this post. I can be coming back to your weblog for
more soon.

My homepage - top ten seo tips 2012

Anônimo disse...

Hi there, I discovered your web site by way of Google even as searching for a similar matter,
your web site got here up, it looks good. I've bookmarked it in my google
bookmarks.
Hello there, simply turned into alert to your weblog via Google, and located that it is
really informative. I am going to watch out for brussels.
I'll appreciate if you happen to continue this in future.
Numerous folks shall be benefited out of your writing. Cheers!


Here is my site :: goji berry, ,