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 ...
- 1,018
5
votes
Accepted
How is this global temperature chart compiled?
As stated in your linked article, the graph shows the global average temperature based on ERA5 reanalysis data.
Typically for graphs like this you integrate the surface temperature over the whole ...
- 1,145
5
votes
What is the baseline temperature for the climate-change debate
You have asked a very incisive and important question. Nevertheless, the basic core of this question has been answered before, here. In sum, the determination is rather simple. As summarized from ...
- 51
4
votes
Accepted
colder after snow
I think you're mixing two things together. There are generally 2 processes that correlate low temperatures during and after a snowfall, but they are separated. These are both based on physical laws ...
- 421
4
votes
What determines the outside temperature when the sun goes down?
In general, a number of factors can come into play, it depends on local circumstances:
Cloud cover - clouds can act as an insulator and retain heat between them and the Earth's surface. Open skies ...
- 24.7k
3
votes
colder after snow
The aftermath of a snowfall can also cause a cooling near the surface, if an air mass moves in that's warm enough to melt the snow. The snow indeed starts to melt, thereby absorbing the latent heat ...
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3
votes
Buoyancy frequency
You can, but the form changes. it is
$N^2=\frac{g}{T}(\frac{dT}{dz} + Γ)$
where $Γ$ is the dry adiabatic lapse rate, given by $g/c_p$
where $c_p$ is the specific heat of air at constant pressure.
2
votes
Accepted
How to download atmospheric/oceanographic data for a given region in the sea?
If you want satellite data, you could use the Copernicus system, which won't, however, provide you with the required variables, but the measured variables directly AFAIK (irradiance in various ...
- 370
2
votes
Accepted
How to calculate wet bulb globe temperature (WBGT) using only temperature and humidity?
Explicit Calculations of Wet-Bulb Globe Temperature Compared With Approximations and Why It Matters for Labor Productivity might help explain what's going on.
Liljegren's method appears to be ...
- 24.7k
2
votes
Accepted
Is equivalent potential temperature constant also for dry adiabatic processes?
Yes. Since the later term doesn't change during dry adiabatic processes and the former neither, the equivalent potential temperature $\theta_e$ does also stay constant for dry adiabatic processes.
...
- 370
2
votes
Accepted
Map of earth subsurface temperature
At a depth of about 1200 km, the temperature can be assumed to be constant, about 5,200° Celsius (9,392° Fahrenheit).
At depths between few hundred meters and some kilometers, the temperature is ...
- 461
2
votes
Is the temperature (even a bit) warmer in a forest?
In addition to what's mentioned in the other answers, there's also the fact that the biological activity in forest soils is typically greater than elsewhere, especially further away from the equator ...
- 121
2
votes
Shouldn't the permanent snow line be considerably higher in the Alps and on Mt Hood if temperature falls 6.5°C per 1000 meters?
There are a couple of issues that you need to add to your picture.
First, the temperature varies over time so it is not constant at a certain elevation throughout e.g. the summer.
Second, snow will ...
- 5,049
2
votes
Is the global temperature of the earth a physical quantity at all?
A global average surface air temperature is not a physical quantity in and of itself but it does provide a reliable indicator of changes to physical properties of global climate. When scientists began ...
- 2,121
1
vote
Unexplained Jump in NOAA Climatological Data Post-2001
I'm using a quick NOAA tool to check precipitation values and I don't see any kind of jump in 2001.
I'm looking at "single station products", Boston Logan Airport, and precipitation (sum) ...
- 31
1
vote
Map showing monthly or weekly average low temperatures in Turkey and Iran
What you are referring to are climate maps, which show average weather values over a 30 year period. Weather forecasters will often then look at 'anomaly' maps which show how current conditions vary ...
- 745
1
vote
Accepted
Dew-point temperature and absolute humidity
They're not directly equivalent. I think the problem is that "absolute humidity" is used to mean both "a measurement of the actual humidity content of the air" ("absolute&...
- 776
1
vote
What is the most optimal latitude on Earth for the generation of extreme maximum temperatures?
Interesting question. I made a quick analysis based on ERA5 climate reanalysis. The maps below show the absolute maximum air temperature at 2 m height above ground (or simply air temperature), derived ...
- 171
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