Saturday 28 February 2015

Introduction to Weather and Climate Questions


Introduction to Weather and Climate Questions

1) What warms the planet?  

Climate scientists have agreed that the main reason for global warming is because of the "greenhouse effect" , its where the atmosphere traps heat radiating from the earth to space. Some gases in the atmosphere also block heat from escaping. Greenhouse gases are a factor which keeps the planet warm.

2) Referring to this diagram explain why the equatorial regions receive more radiation and therefore are warmer than polar regions. 

Referring to the diagram, it is seen that the equatorial regions receive more radiation causing it to be warmer than polar regions because the sun rays are stronger at the equator.  The strong sun rays cause it to be consistently warm and to have characteristics of that of tropical weather.



3) Define Albedo. Which would absorb more radiation a snow covered mountain or a black roof? 

Albedo is the amount or  proportion of the incident light or radiation that is reflected by a surface like a planet or the moon.

A black roof would absorb more radiation because it gets heated much faster due to the black roof absorbing all wavelengths of light and reflecting none.

4) Explain lapse rate.  

Lapse rate is the rate at which temperature drops while the altitude increases.


5) Explain Aspect. In the Northern Hemisphere will plants grow better on the north or the south side facing side of a mountain? 

Aspect is the compass direction which a slope faces for example a slope on the eastern edge of the Rockies towards the Great Plains is known to have an easterly aspect.

In the Northern Hemisphere, plants will grow better on the south facing side of a mountain since it receives more solar radiation and it is not directly shaded by the earth itself.

6) Why do we have seasons? 

We have seasons because the earth is tilting on the axis as it makes its yearly rotation around the sun.


7) Which heats up faster: Land or Water? 

Land heats up faster than water since land absorbs more heat at a faster pace than water does. 

8) Describe the impact that being far away from water has on the climate of the prairies 

Being far away from water causes prairie summers to be hot and humid, and winters to be cold because the region is far from the temperature moderating effect of the oceans. Hence the people on the prairies have to endure the extremities of each season without any moderation.

9) Explain the impact of the Gulf Stream on Norway. 

When the gulf stream is strong, it is known for bringing more warm water northwards which results in Norway getting warmer. That is why Norwegians can enjoy temperatures five to ten degrees warmer than other places so far north.

10) What current runs past BC? 

The California Current is a pacific ocean current which starts from southern British Columbia to southern Baja California. It runs past BC through the pacific ocean.

11) Describe the impact of adding extra carbon dioxide to the atmosphere on the temperatures of Earth. 

Adding extra carbon dioxide to the atmosphere will cause a greenhouse effect because of the interaction between the suns energy and one of the principle greenhouse gases, carbon dioxide. This will increase the temperature of the earth by trapping heat in our atmosphere hence it will get warmer.

12) Describe convection.  THIS IS IMPORTANT TO UNDERSTAND AS WE MOVE THROUGH THE COURSE

Convection is basically the movement in a gas or liquid in which the warmer parts ( hotter tendency materials) move the less dense material up to rise and the colder parts (colder tendency) causes the dense materials to go down and sink because of gravity. It is also known as transfer of heat from this movement.

13) What is wind? 

Wind is the natural movement of air which is usually in the form of a current of air blowing from a particular direction.


14) Explain urban heat islands, and explain why they occur. 

Urban heat islands are a metropolitan area which is significantly warmer than its surrounding rural areas because of human activities. 

This occurs due to many populated people and lots of infrastructure in metropolitan areas. Another reason why metropolitan areas are warmer is that they produce lots of greenhouses gases than rural areas.





Saturday 21 February 2015

5 Themes of Geography (Honolulu, Hawaii)


  

Location of Honolulu, Hawaii


Absolute Location: 21.3000° N, 157.8167° W




Relative Location: 6.0 miles away from Honolulu International Airport.





Place

Waikiki beach is a physical characteristic which is a beachfront neighborhood and located on the South shore of Honolulu. It is clearly distinguished as one of Hawaii's most popular beaches and places.Waikiki, a district in the city of Honolulu is majorly known for its Waikiki beach. This place is where all the tourists come to visit.



Movement


Tourists coming from around the world and moving from place to place to see tourist sites are an example of human movement.







Human-Environment Interaction


The warm environment in Honolulu, Hawaii causes humans to adapt to the environment by wearing suitable summer clothing such as shorts, tank tops, and putting on sunscreen for protecting their skin from the sun.


Region


There are five regions in Hawaii. The five regions are Honolulu, the Windward Coast, Central Oahu, the Leeward Coast, and the North Shore. Hawaii is divided into regions so that geographers are able to interpret specific information for that particular region.

Saturday 14 February 2015

Mauna Loa Volcano in Hawaii

     


 

The Mauna Lona Volcano is large in size and is also one of the most active volcanoes in the world. Half of the island of Hawaii is made up by the volcano and its sheer size makes it about 85% of every other Hawaiian island combined. The first documented eruption was in 1843, and the most recent eruption took place in 1984. Between 1843 and 1984, an additional 32 eruptions took place. It is believed to erupt again therefore the volcano is currently being monitored at all times.

I will primarily be talking about the recent eruption which took place in 1984. It started on March 25, 1984 and lasted until April 15, 1984. During that 3 week long  eruption, rivers of lava came within 4 miles of the outskirts of the city of Hilo. It paved 16 square miles of land with lava in 3 weeks. Mauna Loa eruptions produced lava at a much higher rate than any other Hawaiian volcano. This resulted in fast moving and long travelled lava flows. High eruption rates like this required quick responses in order to protect life and property. There were no fatalities however some agriculture, forests and crops were destroyed. There was also $62 million dollars in property damage which was assessed from the eruption.

https://www.youtube.com/watch?v=sCOXqZp4n7U (Link to a video on the Mauna Loa Volcano in 1984) 


Nighttime photograph of lava heading towards the city of Hilo

In this event, all of the four spheres were present. The biosphere, atmosphere, lithosphere, and hydrosphere were all interacting with one another. It all started with the lithosphere which is also known as the crust and the top layer of the mantle where volcanic eruptions form as they cause molten rocks and hot gases to be pushed through the earths crust. As the volcanoes spewed a lot of gas and matter into the air, it affected the atmosphere by causing it to become polluted. This shows a relation between the lithosphere and atmosphere. The polluted atmosphere also had a negative impact on the biosphere since it  could have caused humans to become sick. The volcano also sent hot lava to flow down on mountains, and caused plants or crops to be destroyed. Which disrupted the biosphere. This a relationship between the lithosphere and biosphere. Volcanoes also affected the hydrosphere because the pollution in the air (atmosphere) due to the ashes caused the water bodies to be polluted. This also shows an interaction between the lithosphere and hydrosphere because of the atmosphere. The hydrosphere relates to the biosphere because water is used by humans and plants for drinking and other purposes. The Mauna Loa volcano is a great example of the 4 spheres interacting together in one event.
4 spheres interacting in the event of a volcano

Wednesday 11 February 2015

Welcome to Hawaii!

                      

             "For me, the magic of Hawaii comes from the stillness, the sea, the stars."
                                                                                             - Joanne Harris 

This is a map of Hawaii, United States of America

Hawaii is a state in the United States of America. The state of Hawaii is located in the middle of the North Pacific Ocean which is about 3,200 kilometres from the coast of the United States. The capital of Hawaii is Honolulu. Hawaii has an area of 10,432km² and has a population of 1.42 million people. The state of Hawaii like the other states in the United States has a democratic republic government.