Global warming essay
Global warming essay
Global warming essay and Scientists have been taking widespread measurements of Earth’s surface temperature since around 1880. These data have steadily improved and, today, temperatures are recorded by thermometers at many thousands of locations, both on the land and over the oceans. Different research groups, including the NASA Goddard Institute for Space Studies, Britain’s Hadley Centre for Climate Change, the Japan Meteorological Agency, and NOAA’s National Climate Data Center have used these raw measurements to produce records of long-term global surface temperature change. These groups work carefully to make sure the data aren’t skewed by such things as changes in the instruments taking the measurements or by other factors that affect local temperature, such as additional heat that has come from the gradual growth of cities.These analyses all show that Earth’s average surface temperature has increased by more than 1.4°F (0.8°C) over the past 100 years, with much of this increase taking place over the past 35 years. A temperature change of 1.4°F may not seem like much if you’re thinking about a daily or seasonal fluctuation, but it is a significant change when you think about a permanent increase averaged across the entire planet. Consider, for example, that 1.4°F is greater than the average annual temperature difference between Washington, D.C., and Charleston, South Carolina, which is more than 450 miles farther south. Consider, too, that a decrease of only 9°F (5°C) in global average temperatures is the estimated difference between today’s climate and an ice age. In addition to surface temperature, other parts of the climate system are also being monitored carefully Global warming essay.
For example, a variety of instruments are used to measure temperature, salinity, and currents beneath the ocean surface. Global warming essay weather balloons are used to probe the temperature, humidity, and winds in the atmosphere. A key breakthrough in the ability to track global environmental changes began in the 1970s with the dawn of the era of satellite remote sensing. Many different types of sensors, carried on dozens of satellites, have allowed us to build a truly global picture of changes in the temperature of the atmosphere and of the ocean and land surfaces. Satellite data are also used to study shifts in precipitation and changes in land cover. Even though satellites measure temperature very differently than instruments on Earth’s surface, and any errors would be of a completely different nature, the two records agree. A number of other indicators of global warming have also been observed. For example, heat waves are becoming more frequent, cold snaps are now shorter and milder, snow and ice cover are decreasing in the Northern Hemisphere, glaciers and ice caps around the world are melting, and many plant and animal species are moving to cooler latitudes or higher altitudes because it is too warm to stay where they are. Global warming essay picture that emerges from all of these data sets is clear and consistent: Earth is warming Global warming essay.
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