Education. If you want to become an optometrist, you'll need about eight years of education. Depending on how fast you work, you might be able to graduate sooner if you take on additional credit hours or complete coursework during the summer.
Although the results for the Earthâs temperature are usually given as anomalies, climate scientists have used the measured temperature data to calculate average temperatures. NOAAâs result for the 20th century average land-ocean Earth surface temperature is 13.9 Â°C. The 2011 NOAA surface temperature anomaly of 0.51 Â°C, gives an average Earth temperature of 14.4 Â°C for 2011. To find out more about how the Earth is warmed and the greenhouse gases that are responsible, see How Atmospheric Warming Works and Greenhouse Gases.
The global average and combined land and ocean surface temperature, show a warming of 0.85 [0.65 to 1.06] Â°C, in the period 1880 to 2012, based on multiple independently produced datasets. The Earth's average surface temperature rose by 7002273890000000000â 0.74Â±0.18 Â°C over the period 1906â2005.ASA stated in their press release January 2015: The year 2014 ranks as Earthâs warmest since 1880, according to two separate analyses by NASA and National Oceanic and Atmospheric Administration (NOAA) scientists.