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Meteorological hazards.pptx

  1. Meteorological hazards "Hazard always arises from the interplay of social and biological and physical systems; disasters are generated as much or more by human actions as by physical events." (Geographer Gilbert F. White, the “father of floodplain management”)
  2. Thait is the natural hazard ?  A natural hazard is an extreme event that occurs naturally and causes harm to humans - or to other things that we care about, though usually the focus is on humans (which, we might note, is anthropocentric). An extreme event is simply an unusual event; it does not necessarily cause harm. Note that many hazards have both natural and artificial components.
  3. Meteorological hazards occur as a result of processes in the atmosphere  . Meteorological disasters are caused by extreme weather such as rain, drought, snow, extreme heat or cold, ice, or wind. Violent, sudden and damaging alteration in the atmosphere associated with, created by, or touching the earth's atmosphere, particularly the weather-forming processes.  Examples of weather disasters embrace blizzard, cyclones, droughts, hailstorms, heat waves, hurricanes, floods (caused by rain) and tornadoes.
  4. Cyclone, tropical cyclone, hurricane, and storm are different names for a similar development of storm that forms over the oceans.
  5. Extra-tropical cyclones, typically known as mid-latitude cyclones, are a bunch of cyclones outlined as synoptic scale low weather systems that occur within the middle latitudes of the planet (outside the tropics) not having tropical characteristics, are connected with fronts and horizontal gradients in temperature and temperature otherwise called "baroclinic zones".
  6. Hailstorms are rain drops that arrive as ice, instead of melting before they hit the bottom. a very damaging storm hit Muenchen, Germany, on July 12, 1984, inflicting two billion greenbacks in insurance claims.
  7. A wave is an atmospheric condition. The worst wave in recent history was the eu wave of 2003.
  8.  A tornado could be a violent, dangerous, rotating column of air that's up-to-date with each the surface of the planet and a thundercloud or, in rare cases, the bottom of a cumulus. It’s additionally named as a twister or a cyclone, though the word cyclone is employed in meteorology during a wider sense, to talk over with any closed low circulation. Tornadoes are available in several shapes and sizes; however they are usually within the style of a plain condensation funnel, whose slim finish touches the planet and is usually encircled by a cloud of trash and dirt.
  9. Most tornadoes have wind speeds but a hundred and ten miles per hour (177 km/h), are just about 250 feet (80 m) across, and travel a number of miles (several kilometers) before dissipating. The foremost extreme tornadoes will attain wind speeds of over three hundred mph (480 km/h), stretch over 2 miles (3 km) across, and remain the bottom for dozens of miles (perhaps over a hundred km).
  10. Acid rain results when sulfur dioxide (SO2) and nitrogen oxides (NOX) are emitted into the atmosphere and transported by wind and air currents. The SO2 and NOX react with water, oxygen and other chemicals to form sulfuric and nitric acids. These then mix with water and other materials before falling to the ground. While a small portion of the SO2 and NOX that cause acid rain is from natural sources such as volcanoes, most of it comes from the burning of fossil fuels. The major sources of SO2 and NOX in the atmosphere are: - Burning of fossil fuels to generate electricity. Two thirds of SO2 and one fourth of NOX in the atmosphere come from electric power generators. - Vehicles and heavy equipment. - Manufacturing, oil refineries and other industries. Winds can blow SO2 and NOX over long distances and across borders making acid rain a problem for everyone and not just those who live close to these sources.
  11. The global warming  The world is getting warmer: that much is certain. According to a 2020 report by the World Meteorological Organization (WMO), the global mean surface temperature last year was approximately 1.2°C warmer than the pre- industrial baseline (1850-1900); while the most recent decade, between 2011 and 2021, was the warmest on record. And although energy-related CO2 emissions did fall last year by 5.8 percent as a result of the COVID-19 pandemic, total global greenhouse emissions still increased year-on-year. The underlying trend is clear, the curves of most climate change graphs continue to snake upwards with alarmingly consistency.