让我们把这一种不同的方式:特定的湿度是多少水在空气中。更多的温暖往往意味着更多的蒸发。变暖的空气也引发了多少水可以容纳的极限。所以第二个原因具体湿度可以提高上限水平。另一方面,相对湿度是衡量如何* *空气。这并不代表多少水确实是在空中。如果上限水平,但实际的水的数量只增加一点……它实际上比以前更接近充分。认为主要是满碗和四分之一满浴缸……有更多的水在浴缸里,但是它的相对完整。 Hopefully this graph, showing the weather from Duluth, MN the past couple weeks, can help show the point: [![enter image description here][1]][1] The green and pink lines fluctuate in almost perfect opposite pattern, almost like a heartbeat, just about touching most each day, then separating far apart. That's the daily cycle, and similar over most of the world most of the year... and it's mainly just all caused by temperature change; in the daytime it gets hot, so the air can hold more water, but the amount of actual water doesn't change much. At night it cools down, "shrinking the container", until it's just about saturated again around dawn, despite not losing water. RH is honestly a lame moisture measure, meteorologists really don't use it too much. Because it doesn't mean much, it really just reflects that temperature fluctuates each day. And that's not ground breaking information! When forecasting severe weather or precipitation or snow or tropical cyclones... it tells us almost nothing of use. Dew point, which is probably the most used absolute measure of water... is much more useful to us. It shows how much water is in the air. And notice if anything, it's going the same way as temperature instead of the opposite. So this graph shows relative and absolute humidity typically fluctuate the opposite of temperature. So hopefully it makes sense that if it's getting warmer, that opposite trend would be a possible result. The overall water goes up... the "fullness percentage" may still go down. Absolute and relative humidity do both "measure" water vapor in the air. But because one, RH, really is more a temperature measurement masquerading as a water measurement than truly track water changes... they move in opposite ways. 
 (Just a side note: absolute humidity is often more independent and stable from temperature. Wind changes like fronts and sea breezes can mean more connected movement, because different airmasses are coming in. But hopefully graphs for other areas can help you explore the trend more and be convinced of the main ideas: ([Orlando][2], [San Antonio][3], [Seattle][4], [Phoenix][5], [Nairobi Kenya][6], [Tehran Iran][7], [Singapore][8], [Sydney Australia][9], [Guam][5]) [1]: https://i.stack.imgur.com/i2efk.png [2]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=KMCO&num=336 [3]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=KSAT&num=336 [4]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=KSEA&num=336 [5]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=PGUM&num=336 [6]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=HKJK&num=336 [7]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=OIII&num=336 [8]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=WSSS&num=336 [9]: https://www.wrh.noaa.gov/zoa/getobext.php?sid=YSSY&num=336