55 votes
Accepted

How it's possible to measure temperature 2000 years ago with such precision?

How it's possible to measure temperature 2000 years ago? Sans the technology used by Bill and Ted ("Bill and Ted's Excellent Adventure"), it obviously is not possible to directly measure ...
David Hammen's user avatar
  • 23.6k
41 votes

Why would it be drier indoors during the winter vs the summer?

The only physics you need to know is that if the temperature is higher the air† can hold more water vapour (the gaseous phase of water). Cool molecules don't have enough energy to free themselves from ...
Matt Hall's user avatar
  • 11k
39 votes
Accepted

I just read news that Antarctica had set a new record high temperature, above 18 °C. How can this be the case if it is currently winter there?

You just read the news too fast. WMO announced that, after evaluation by a committee, they have validated the 18.3°C temperature recorded in February (i.e., in summer) last year: GENEVA, 1 July 2021 (...
Jean-Marie Prival's user avatar
38 votes

Does human body temperature impact climate change?

Does human body temperature impact climate change? Directly? It's not even a blip. The Earth's population is 7.6 billion. With each person radiating about 80 watts (basal metabolism), that's about 600 ...
David Hammen's user avatar
  • 23.6k
37 votes
Accepted

Why is geothermal heat insignificant to surface temperature?

One kilometer of rock is actually a lot to dig through to get to that very warm condition. The key quantity here is heat flux. The crux of the matter is: Geothermal heat flux is only a small fraction ...
Oscar Lanzi's user avatar
  • 3,831
35 votes
Accepted

Why aren't weather balloons left in the atmosphere permanently?

In addition to radiosondes that do a single ascent over a few hours, there are also driftsondes that stay in atmosphere for days or weeks, typically with their buoyancy set up to track a particular ...
Deditos's user avatar
  • 3,950
30 votes
Accepted

Why are mornings cooler than nights?

The Earth is always radiating heat to the space. But in the day the Sun delivers some heat. The net heat flux is then defined as the sum of those two factors. If the energy delivered by the Sun is ...
User123's user avatar
  • 638
30 votes
Accepted

Why does the temperature change about every 50-100 meters near hills

To extend @Poutnik's invisible river analogy, the cold air can also 'pool' in small dips. On clear nights, temperature fluctuations are quite a frequent occurrence due to radiative cooling. If the ...
Mehmet Karatay's user avatar
28 votes
Accepted

How to interpolate scattered data to a regular grid in Python?

It is straightforward to do so with numpy, scipy.interpolate.griddata, and matplotlib. Here ...
milancurcic's user avatar
  • 4,983
24 votes
Accepted

Why was there a negative temperature anomaly between 1950 to 1980?

This phenomenon is known as global dimming. It was due to the particles and aerosols mostly released by combustion of fossil fuels such as diesel. Those particles block the radiation from the sun, so ...
Jean-Marie Prival's user avatar
24 votes

Why aren't weather balloons left in the atmosphere permanently?

It depends on what each weather balloon is measuring; what data they are capturing. Most weather balloons are released as specific times during a 24 hour cycle. Such balloons measure altitude, ...
Fred's user avatar
  • 24.7k
19 votes
Accepted

What was the highest temperature ever recorded on the surface of Earth?

The record the article is referring about seems to be the same as registered at Guiness World Records: On 13 September 2012 the World Meteorological Organisation disqualified the record for the ...
Camilo Rada's user avatar
  • 17.7k
18 votes

If the earth is a globe, what causes temperature differences across lines of latitude?

Polar regions are colder than equatorial ones for a simple reason - geometry. More specifically, it is caused by the greater angle of the Sun's rays to the surface of the Earth. As you go farther ...
Spencer's user avatar
  • 3,558
16 votes
Accepted

Could this study "totally dismantle" Global Warming claims?

There is several credibility problems with this work. First, they mention after the title: Abridged Research Report but I cannot find any related full work from the authors on the matter. As a ...
marsisalie's user avatar
  • 2,673
15 votes

Does the US National Weather Service use Celsius or Fahrenheit?

That device only shows Fahrenheit I don't know about the full Weather Service, but that device only shows Fahrenheit measurements. You can see this in the user manual, in the appendix, page 18
GPPK's user avatar
  • 259
15 votes
Accepted

Is there a recent global gridded temperature dataset with 0.1 deg resolution?

The most important reanalysis datasets covering until present time (I'm excluding the others that stop some years before present time) currently available are: ERA5 by ECWMF: 1979-present (soon 1950-...
Nemesi's user avatar
  • 1,268
15 votes
Accepted

Is the global temperature of the earth a physical quantity at all?

There is no unique way to define a global average temperature of the Earth, but that does not mean that calculation of such a quantity is "pointless". If someone tells me that the average ...
David Bailey's user avatar
  • 1,018
14 votes

Why is it colder in the mountains than at sea level?

The traditional answer basically comes down to the physics concept of adiabatic cooling, a description of which is: There is less pressure as you go up in the atmosphere (basically due to less air ...
JeopardyTempest's user avatar
14 votes
Accepted

Why does the intensity of sunlight depend on your latitude?

As noted in the comments, this answer applies to things like sun-bathing and solar panels, but it does not apply so much to a specific point-receptor like an eyeball. If all objects in question are ...
Aaron's user avatar
  • 361
14 votes

Why would it be drier indoors during the winter vs the summer?

Because cooling air tends to take out moisture, while heating air doesn't change the actual moisture levels. When air gets colder, it can't "hold" as much water vapor (lower saturation vapor ...
JeopardyTempest's user avatar
13 votes

How to interpolate scattered data to a regular grid in Python?

You have a lot of options. The easiest solution for this simple task would be to use a GIS software, e.g. the free QGIS. Add delimited text layer and try raster interpolation. Download a free ...
user2821's user avatar
  • 5,946
13 votes

Why aren't weather balloons left in the atmosphere permanently?

There are several reasons for this. One of them is air traffic concerns. The parts of the atmosphere that are interesting for weather (namely, the troposhere and lower stratosphere) also happen to be ...
reirab's user avatar
  • 303
12 votes
Accepted

Does climate change cause increase in CO2?

One reason is that we know exactly where the current increased CO2 comes from. That is, we know from economic data how much petroleum, natural gas, & coal is extracted and burned. From that ...
jamesqf's user avatar
  • 1,758
12 votes
Accepted

Do hurricanes cool the earth?

Hurricanes can be viewed as having primary and secondary circulations. The primary circulation is what we see in satellite photos, comprising the winds and clouds that circle the low pressure zone at ...
David Hammen's user avatar
  • 23.6k
12 votes
Accepted

Where on Earth has the least changing temperature?

To answer the first question, yes, there are maps showing the seasonal temperature variation, for example here Unsurprisingly, the equatorial areas have the least variation because the angle of the ...
Geochron's user avatar
  • 851
12 votes

Why are the clouds white and Australia black in weather satellite infrared images?

I had a very similar question in a job interview! The only difference is that it was an image from SEVIRI on Meteosat. The imager on HIMAWARI is called the Advanced Himawari Imager (AHI). The AHI ...
gerrit's user avatar
  • 11.7k
11 votes
Accepted

Snowing when the actual temperature is around $\small\sf9^o$ Celsius

The clouds in which snow originates must of course be below the freezing point 0°C = 32°F. Two factors allow snow to reach the surface when the near-ground air temperature is above freezing. The ...
Jack Denur's user avatar
11 votes
Accepted

Are average daily temperatures affected by DST?

They compensate for DST. That is, for any daily measurement, they use the same universal time every day of the year. If they take a measurement at 7:00 local time in summer, they will take the same ...
gerrit's user avatar
  • 11.7k
11 votes

Could this study "totally dismantle" Global Warming claims?

Etienne Godin mades some good points about various credibility problems with the paper. I decided to take a quick look at the actual content, to see if the authors have any good points. I'll summarize ...
kingledion's user avatar
  • 3,376

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