degrees above the 1990 value, and expected to rise 2-5 degrees above this value by 2100.
To measure global average temperatures groups of meteorologists, such as the World Meteorological Organization (WMO) and the Global Climate Observing System (GCOS), have a large number of observation points on the continents, which are then gridded into equal areas to assign a temperature for each box in the grid. Observations from satellites are widely used where local observations are not available and for calibrating the models. Local effects, such as any urban heat island effect from cities, are accounted for in these types of model. With rapid improvements in computer modeling it has been possible to make more and more detailed and accurate models for the Earth.
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Preparing for Armageddon, Natural Disasters, Nuclear Strikes, the Zombie Apocalypse, and Every Other Threat to Human Life on Earth. Most of us have thought about how we would handle various types of scenarios that could signal the end of the world. There are plenty of movies on the subject, psychological papers, and even survivalists that are part of reality TV shows. Perhaps you have had dreams about being one of the few left and what you would do in order to survive.