PLEASE NOTE:

MyNews24 is a user-generated section of News24.com. The stories here come from users.

 
Clinton
 
Comments: 53
Article views: 1628
 
 
Latest Badges:



 
View all Clinton's badges.
 

The hurricanes are telling us the world is in crisis

01 November 2012, 12:03

I had a look at the data available for tropical cyclones (which include typhoons and hurricanes) on Wikipedia. They list the major tropical cyclone storm systems from the North Atlantic Ocean, Eastern Pacific Ocean, Western North Pacific Ocean, South-West Indian Ocean, Australian Region, South Pacific Ocean and South Atlantic Ocean with the year as well as the lowest pressure measured (intensity).


A tropical cyclone is a storm system characterized by a low-pressure centre surrounded by a spiral arrangement of thunderstorms that produce strong winds and heavy rain. Tropical cyclones strengthen when water evaporated from the ocean is released as the saturated air rises, resulting in condensation of water vapour contained in the moist air. The term "tropical" refers both to the geographical origin of these systems, which usually form in tropical regions of the globe, and to their formation in maritime tropical air masses. The term "cyclone" refers to such storms' cyclonic nature, with counter clockwise wind flow in the Northern Hemisphere and clockwise wind flow in the Southern Hemisphere. The opposite direction of the wind flow is a result of the Coriolis force. The centre of these systems is characterised by extremely low atmospheric pressure (measured in hPa). The lower the atmospheric pressure in the centre, the greater the intensity of the storm.  Depending on its location and strength, a tropical cyclone is referred to by names such as hurricane, typhoon, tropical storm, cyclonic storm, tropical depression, and simply cyclone.  The tropical cyclones in the northwest Pacific Ocean are the largest on earth on average, with North Atlantic tropical cyclones roughly half their size. What made Hurricane Sandy so destructive was the huge size rather than the intensity. It was only classified as a Category 1 Hurricane (104-133 km/h wind speed), whilst Hurricane Katrina which destroyed New Orleans was a Category 5 Hurricane (greater than 250 km/h wind speed). Hurricane Sandy was physically larger than the whole of South Africa when it was approaching New Jersey.


For each of the individual ocean basins, different threshold intensities are used by Wikipedia before they are added to the list. This is because the storms in the various ocean basins tend to be very different in size with the most powerful being in the Western North Pacific and only storms with an intensity of less than 900 hPa are listed. For the other ocean basins, 920 hPa is the threshold used except the South Atlantic Ocean where tropical cyclones are rare. Only 4 with an intensity of less than 1000 hPa are listed. The data for the North Indian Ocean is incomplete prior to 1990 and thus I excluded it from my analysis.   


In plotting the data on a simple scatter plot (year and intensity), the following is observed:

- The number of large storms is increasing in all regions except the Western North Pacific Ocean. This region peaked in the 1960s-1980s. 


- The intensity of the storms is increasing except in the Western North Pacific Ocean (staying constant or a very slight increase in intensity) and South-West Indian Ocean. The number of storms in the South-West Indian Ocean has however increased dramatically however over the last decade and thus the trend is skewed by a single large storm in 1980. 


So it is thus concluded that the tropical cyclones are increasing in intensity as well as frequency in most regions of the world. Hurricane Sandy was abnormally large for a North Atlantic Ocean tropical cyclone. The correlation with global warming and these trends would be expected and thus the world can expect more devastation as the temperatures rise, but the effects would be felt differently in different regions. The physical sizes of the storms would also appear to be increasing and thus they impact on larger regions.

Climate change is caused by factors that include oceanic processes (such as oceanic circulation), variations in solar radiation received by Earth, plate tectonics and volcanic eruptions, and human-induced alterations of the natural world (mainly by the increased emissions of greenhouse gasses like CO2). It’s this last cause about which all the debate and political squabbling is currently happening. The industrialised nations like the USA would like to show that it’s not only the impact of their industries which have caused the global increases in temperatures and thus point to the other possible causes as well as historic variations in global temperatures. The emerging nations feel that the industrialised nations should be held liable for the current levels of CO2 and be allowed to develop to the same industrialised levels without any penalties. And all the while the earth is crying out in agony as we continue to destroy our atmosphere.


http://en.wikipedia.org/wiki/Climate_change

http://en.wikipedia.org/wiki/List_of_most_intense_tropical_cyclones

http://en.wikipedia.org/wiki/Tropical_cyclone


Disclaimer: All articles and letters published on MyNews24 have been independently written by members of News24's community. The views of users published on News24 are therefore their own and do not necessarily represent the views of News24. News24 editors also reserve the right to edit or delete any and all comments received.
 

Read News24’s Comments Policy

24.com publishes all comments posted on articles provided that they adhere to our Comments Policy. Should you wish to report a comment for editorial review, please do so by clicking the 'Report Comment' button to the right of each comment.

Comment on this story
53 comments
Add your comment
Comment 0 characters remaining

Read more from our Users

Submitted by
Thulane Che Trosky
The bling mentality!

What appears as a crisis on money market is, in reality an expression of abnormal conditions in the very process of production and reproduction. Read more...

1 comments 87 views
Submitted by
Mangi Phetla328
What one can do with R246m

At has been said and or written about the R 246 million that has been spent on the private residence of the President of our country in Nkandla. Read more...

4 comments 269 views
Submitted by
Thulane Che Trosky
The stain of the slain……….

Blood was spilt, families lost breadwinners, husbands, sons and daughters. Read more...

8 comments 439 views
Submitted by
RealEyes
People need to think

People need to be taught how to think, not what to think... Read more...

14 comments 399 views
Submitted by
johan609
Circles of hate

Blame only succeeds to hold us back. Read more...

10 comments 434 views
Submitted by
Thanduxolo Mabaso
What women want

How am I supposed to know? Read more...

9 comments 429 views

Jobs in Cape Town [change area]

Property [change area]

Travel - Look, Book, Go!

Magical Massinga

Spend 5 nights at the gorgeous Massinga Beach Lodge in Mozambique and only pay for 4 from R13 220 per person sharing. Includes return flights, accommodation, transfers and romantic turndown. Book now!

Kalahari.com - shop online today

Save up to 30% off top fragrances

Get mind blowing savings on selected fragrances. Offer valid while stocks last. Shop now!

Up to 40% off fashion accessories

Save up to 40% on selected handbags, purses, watches, jewellery and more. Offer valid while stocks last. Shop now!

Save up to R2000 on top electronics

Get every day mind bowing savings on top electronics. Offer valid while stocks last. Shop now!

Save up to 50% on Women’s month treats!

Celebrate the awesome women in your life with awesome treats like beauty products, fashion accessories, bestselling books, electronics and more. Offer valid while stocks last. Shop now!

Up to 60% off - clearance sale!

Save up to 60% on appliances, books, electronics, toys, movies and more. Offer valid while stocks last. Shop now!

OLX Free Classifieds [change area]

Samsung Galaxy s4

Mobile, Cell Phones in South Africa, Western Cape, Cape Town. Date October 24

Best bargain in big bay

Real Estate, Houses - Apartments for Sale in South Africa, Western Cape, Cape Town. Date October 25

VW Golf 6, 1.6 Trendline (Excellent condition)

Vehicles, Cars in South Africa, Western Cape, Cape Town. Date October 25

 

services

E-mail Alerts The latest headlines in your inbox

RSS feeds News delivered really simply.

Mobile News24 on your mobile or PDA

E-mail Newsletters You choose what you want

News24 on your iPhone Get News24 headlines on your iPhone.

SMS Alerts Get breaking news stories via SMS.

Blogs Your opinion on you, me and everyone.

Calais Website keywords automated by OpenCalais.

 
Interactive Advertising Bureau
 
© 2014 24.com. All rights reserved.
There are new stories on the homepage. Click here to see them.
 
English
Afrikaans
isiZulu

Hello 

Create Profile

Creating your profile will enable you to submit photos and stories to get published on News24.


Please provide a username for your profile page:

This username must be unique, cannot be edited and will be used in the URL to your profile page across the entire 24.com network.

Settings

Location Settings

News24 allows you to edit the display of certain components based on a location. If you wish to personalise the page based on your preferences, please select a location for each component and click "Submit" in order for the changes to take affect.








Facebook Sign-In

Hi News addict,

Join the News24 Community to be involved in breaking the news.

Log in with Facebook to comment and personalise news, weather and listings.