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  • The earth has a lot of warm places: forest fires, lava floes, iron foundries, the inside

  • of your toaster oven, nuclear reactors, and so forth. But, if we're just talking about

  • regular old sun-heats-the-earth climate and weather, where on the earth's surface is hottest?

  • Some might say "Death Valley," which isn't a bad guess, as the 56.7°Celsius temperature

  • observed 100 years ago on July 10, 1913-- at aptly named Furnace Creek -- remains, according

  • to official weather statistics, the highest temperature ever recorded.

  • However, weather stations measure air temperature in the shade about a meter and a half above

  • the ground.  And as you know if you've ever walked barefoot across a beach on a hot day,

  • surfaces in direct sunlight can be a lot hotter than the air just above them.

  • Plus, there are only 11,119 official weather stations scattered across the globe, which

  • equates to only 1 station every 13,000 square kilometers, or about six on average for an

  • area the size of Scotland (not that Scotland is a leading candidate for heat waves). Super

  • hot places like deserts are particularly harsh and remote, making weather stations impractical

  • and even less common.

  • So to find the true hottest place on earth, we need an army of meteorology students to

  • install and monitor thermometers on every inch of the planet. Or we could measure the

  • the temperature of the earth from space... which NASA does, every day. The Terra and

  • Aqua satellites carry instruments called spectroradiometers which detect the infrared radiation, that

  • is, the heat, radiating from the Earth's surface. Their resolution isn't amazing, since the

  • satellites measure temperature averaged over each square kilometer of the globe, but that's

  • still 13,000 times better than weather stations.

  • And the winner for hottest square kilometer on earth? Not Furnace Creek - it only clocked

  • in at 62.7C. Not the "Scorched Wheat" plateau in the Lut Desert of Iran, either, despite

  • repeated claims to be the hottest place on earth. However, it's close - a nearby portion

  • of the Lut Desert is the winner at 70.7C, or 159.3F. That's one degree hotter than you

  • need for the proteins in an egg yolk to coagulate - that is, to cook. No need for your toaster

  • oven - breakfast is served.

The earth has a lot of warm places: forest fires, lava floes, iron foundries, the inside


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地球上最熱的地方 - Hottest Place on Earth

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    VoiceTube 發佈於 2013 年 08 月 20 日