Sunday, November 30, 2014

The Future of New Zealand

New Zealand is a unique country because of its vast amounts of volcanoes, wild climate, and special landscape. Ever since New Zealand was formed it has been a part of the Ring of Fire where the country has had approximately a couple dozen volcanoes, some of which are still active. The country also isn’t any stranger to cyclones or earthquakes. Because of these features, the countries future landscape could change dramatically.

If someone was to imagine what New Zealand’s landscape would look like 10,000 years, 1,000,000 years, or 100,000,000 years from now I would assume that it would look like a whole new country. The country has already been split into two main islands ever since the country broke away from Gondwanaland. Over the past 65 million years the country has been shifting to shape what it currently is today.

Map of volcanoes in New Zealand


I predict that in 10,000 years the country will start to submerge little by little due to the shifting plates of the Alpine Fault and cyclones making the country relatively smaller in size. However with these shifting plates I also believe more volcanoes will form and start to consume New Zealand. If this happens, then the islands climate could change and may not become a safe place to live. Depending on the size of the earthquake, it’s possible for the sea level to drop resulting in more land being exposed.

In 1,000,000 years I predict that the country splits into 3 main islands with a separation by submergence in Auckland. The city is already becoming fragile with only a couple miles of land holding the North Island in place. Due to this separation, I believe the islands will start to drift further apart resulting in the middle island to stay put while the North Island will drift closer towards the equator. When this happens the new North Island will experience a climate change that has the potential to change the behavior of the volcanoes and could also affect global warming.

The is a video showing how New Zealand's Formation has changed in the past


In 100,000,000 years I predict that the country will again split into more islands with the separation of another North Island area right below the city of Whangarei. This area is only about 10 miles wide with two rivers coming together on the east and west sides of the country. At this point I can see the South Island beginning to drift southwest towards Antarctica with the Australian-Indian Plate while the other North Islands drifting northeast towards the equator with the Pacific plate.


I predict these results because the country has had a history of multiple landscape formations due to the high activity of shifting tectonic plates over the past several million years. Also because the country also gets a wild number of cyclones and hurricanes; which have been known to be destructive and can alter a country’s landscape with just one disaster. All it would take is the divergence of the two plates or a submergence cause by a cyclone to make this country break apart into more islands.





Thursday, November 13, 2014

New Zealand Cyclones

Map of New Zealand showing the North and South Islands

http://www.freeworldmaps.net/oceania/new-zealand/new-zealand-map-big.jpg

As you can see New Zealand consists of two islands off the coast of Australia. Because the country is surrounded by water and is south of the equator, it is likely to get tropical storms. On average, most areas in New Zealand get between 600-1600 mm of rain each year. In order for a tropical storm/cyclone to occur, the storm would have to have a strong coriolis effect, high sea surface temperature, few changes in wind speed and direction, lots of water vapor, and some convergence as a trigger. As soon as one of these “ingredients” disappears or as soon as the cyclone passes over land, the cyclone will disappear as well. Cyclones are typically formed over warm ocean water, at least 79F through a depth of 60m, thus formatting clouds. And if there is low air pressure where these clouds are formed, then it pulls the clouds in and begins to rotate, picking up speed and turning into a cyclone.
Diagram showing how cyclones are formed

http://c9geonaturalhazards.wikispaces.com/file/view/Picture111.png/153462795/Picture111.png 
Because of the location of New Zealand, the country has a tropical climate that qualifies it to have quite a few tropical storms. In fact, a major cyclone has hit New Zealand this past March 2014, Cyclone Lusi. Although the country prepared for the worst, Cyclone Lusi was not as destructive as it could have been. With only several deaths, flooded streets, broken power lines, a few damaged roofs, heavy rain and heavy wind, the cyclone only managed to moderately destroy parts of the country with a rating of category 3.

This is an image of Cyclone Lusi over New Zealand

http://img.ibtimes.com/www/data/images/full/2014/03/11/441756-an-extratropical-cyclone-is-seen-over-the-united-kingdom-using-moderat.jpg

If you are caught in a cyclone zone in New Zealand, the safest thing you could do is go inland (away from the ocean) and get indoors. However with todays technology, we are able to track storms and predict when and where they are going to hit. This gives people time to gather family and some important belongings and get away from the impact zone.



http://www.em.gov.au/sites/schools/getthefacts/cyclones/pages/default.aspx 
https://www.niwa.co.nz/education-and-training/schools/resources/climate/overview 
http://www.nzherald.co.nz/nz/news/article.cfm?c_id=1&objectid=11219244