About the Earths Geographic and Magnetic South Pole

About the Earths Geographic and Magnetic South Pole The South Pole is the southernmost point on the Earths surface. It is at 90ËšS latitude and it is on the opposite side of the Earth from the North Pole. The South Pole is located in Antarctica and it is at the site of the United States Amundsen-Scott South Pole Station, a research station that was established in 1956. Geography of the South Pole The Geographic South Pole is defined as the southern point on Earths surface that crosses the Earths axis of rotation. This is the South Pole that is located at the site of the Amundsen-Scott South Pole Station. It moves about 33 feet (ten meters) because it is located on a moving ice sheet. The South Pole is on an ice plateau about 800 miles (1,300 km) from McMurdo Sound. The ice at this location is about 9,301 feet (2,835 m) thick. As a result ices movement, the location of the Geographic South Pole, also called the Geodetic South Pole, must be recalculated yearly on January 1. Usually, the coordinates of this location are just expressed in terms of latitude (90ËšS) because it essentially has no longitude as it is located where the meridians of longitude converge. Although, if longitude is given it is said to be 0ËšW. In addition, all points moving away from the South Pole face north and must have a latitude below 90Ëš as they move north toward the Earths equator. These points are still given in degrees south however because they are in the Southern Hemisphere. Because the South Pole has no longitude, it is difficult to tell time there. In addition, time cannot be estimated by using the suns position in the sky either because it rises and sets only once a year at the South Pole (due to its extreme southern location and the Earths axial tilt). Thus, for convenience, time is kept in New Zealand time at the Amundsen-Scott South Pole Station. Magnetic and Geomagnetic South Pole Like the North Pole, the South Pole also has magnetic and geomagnetic poles which differ from the 90ËšS Geographic South Pole. According to the Australian Antarctic Division, the Magnetic South pole is the location on the Earths surface where the direction of the Earths magnetic field is vertically upwards. This forms a magnetic dip that is 90Ëš at the Magnetic South Pole. This location moves about 3 miles (5 km) per year and in 2007 it was located at 64.497ËšS and 137.684ËšE. The Geomagnetic South Pole is defined by the Australian Antarctic Division as the point of intersection between the Earths surface and the axis of a magnetic dipole that approximates the Earths center and the beginning of the Earths magnetic field. The Geomagnetic South Pole is estimated to be located at 79.74ËšS and 108.22ËšE. This location is near the Vostok Station, a Russian research outpost. Exploration of the South Pole Although exploration of Antarctica began in the mid-1800s, attempted exploration of the South Pole did not occur until 1901. In that year, Robert Falcon Scott attempted the first expedition from Antarcticas coastline to the South Pole. His Discovery Expedition lasted from 1901 to 1904 and on December 31, 1902, he reached 82.26ËšS but he did not travel any farther south. Shortly thereafter, Ernest Shackleton, who had been on Scotts Discovery Expedition, launched another attempt to reach the South Pole. This expedition was called the Nimrod Expedition and on January 9, 1909, he came within 112 miles (180 km) from the South Pole before he had to turn back. Finally in 1911 however, Roald Amundsen became the first person to reach the Geographic South Pole on December 14. Upon reaching the pole, Amundsen established a camp named Polhiem and named the plateau that the South Pole is on, King Haakon VII Vidde. 34 days later on January 17, 1912, Scott, who was attempting to race Amundsen, also reached the South Pole, but on his return home Scott and his entire expedition died due to cold and starvation. Following Amundsen and Scotts reaching the South Pole, people did not return there until October 1956. In that year, U.S. Navy Admiral George Dufek landed there and shortly thereafter, the Amundsen-Scott South Pole Station was established from 1956-1957. People did not reach the South Pole by land though until 1958 when Edmund Hillary and Vivian Fuchs launched the Commonwealth Trans-Antarctic Expedition. Since the 1950s, most of the people on or near the South Pole have been researchers and scientific expeditions. Since the Amundsen-Scott South Pole Station was established in 1956, researchers have continually staffed it and recently it has been upgraded and expanded to allow more people to work there throughout the year. To learn more about the South Pole and to view webcams, visit the ESRL Global Monitorings South Pole Observatory website. References Australian Antarctic Division. (21 August 2010). Poles and Directions: Australian Antarctic Division. National Oceanic and Atmospheric Administration. (n.d.). ESRL Global Monitoring Division - South Pole Observatory. Wikipedia.org. (18 October 2010). South Pole - Wikipedia, the Free Encyclopedia.

Principle, Principal

Principle, Principal Principle, Principal Principle, Principal By Sharon Principle and principal are easily confused. It doesnt help that they are homophones, which means they sound alike. Heres a guide to what they mean and how you can tell them apart. Principle The word principle means a standard, a law or a rule. This means you can have: the principles of economics, which are the laws that govern economic theory moral principles, which are the rules and standards that govern your behavior Principal The word principal usually refers to a person. Remember that it ends in pal, which is a person. A principal can be: the head of a school the head of an organization the main person involved in a contract or financial negotiation Putting It All Together If you remember that principal is a person, then you can easily make sense of this sentence: The principal taught us the first principle of social responsibility. Want to improve your English in five minutes a day? Get a subscription and start receiving our writing tips and exercises daily! Keep learning! Browse the Misused Words category, check our popular posts, or choose a related post below:Congratulations on or for?In Search of a 4-Dot EllipsisTypes of Plots