All Questions
Tagged with meteorology temperature
98 questions
4
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Why do anticyclones bring clear skies in summertime?
It's obvious that in summer anticyclones bring hot weather. But why clear skies?
Heat evaporates the moisture and should lead to the cloud formation, shouldn't it?
4
votes
1
answer
311
views
What is the second thermometer in the image from the Esperanza Antarctic temperature record?
Today, the Argentinian meteorological service tweeted about a new temperature record for Antarctica of 18.3°C, made on the Espezanza peninsula. This was subsequently reported by many other sources.
...
- 817
4
votes
1
answer
141
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What are the possible mechanisms that could cause a rapid drop of temperature over few days?
I live in Hong Kong. Two days ago, the average daily temperature was around 27–28 °C and in yesterday, it was around 22–23 °C (during daytime it was rather hot i.e. 26–27 °C and it was at night that ...
- 704
4
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3
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652
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Potential temperature constant in a well-mixed atmospheric layer?
Why is the potential temperature, defined as $\theta = T\Big(\frac{P_0}{P}\Big)^{R/c_p}$, constant in a well-mixed layer? I understand that the dew point temperature has to be parallel to a line of ...
- 325
4
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1
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Is equivalent potential temperature constant also for dry adiabatic processes?
Equivalent Potential Temperature, defined as
$$\theta_e = \theta \cdot e^{qL/c_pT}$$
with $\theta$ denoting potential temperature and q the specific moisture of water remains constant for wet ...
- 985
4
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2
answers
109
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Where'd Summer go?
So I live in Texas, and it get awfully hot in the summer- like 37°C hot- and yet, when winter rolls around, it can get down to 4° or 5° pretty easily. So, my limited understanding or weather and stuff ...
- 43
4
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1
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163
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What is a reasonable range of values for resistance to heat flux?
I am developing a simple parameterisation scheme script to predict surface temperature.
The script calculates six heat fluxes including sensible heat flux using a resistance to heat flux parameter. ...
- 151
4
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1
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156
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ISA Model and GFS data
I have a newbie question...
I always used the International Standard Atmosphere model whenever I needed to calculate the temperature in a given altitude.
It always looked accurate to me...
However,...
- 143
4
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0
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57
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Better method to identify seasons in temperature time series?
I'm trying to find a way to automatically detect the start/end of the 4 seasons based on a time series of daily mean temperature.
According to this paper summer and winter can be defined as (smoothed) ...
- 471
4
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0
answers
110
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How much does a global model's accuracy change with the timestep?
I've been working with ICON, ICON-EU and GFS forecasts, and it seems like the temperature results are "close" for the same location, 6 hour forecasts and 120 hour forecasts - MAE: 5.7 and 6....
- 41
4
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443
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What is the reason behind some of the biome anomalies in Africa?
For example :
The center of Africa lies in the Equatorial region and yet, does not have tropical rainforests all the way across.
The island of Madagascar has two different biomes
Since altitude and ...
- 81
4
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0
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36
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Dynamic frontogenesis derivation
On page 142 of Lackmann's Midlatitude Synoptic Meteorology, Equation 6.7 gives the derivative of the Boussinesq buoyancy $b = \frac{g \theta'}{\theta_0 (z)}$ (perturbation potential temperature $\...
4
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1
answer
482
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How to measure global temperature?
people always talk about global temperature (such as the global temperature goal of 1,5 K) - but how is this value achieved? It seems to me that it clearly depends on where the measuring stations are, ...
- 143
4
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3
answers
1k
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Why isn't wind speed considered when calculating a heat index?
I work outside in Florida, and the heat is sometimes unbearable. But if a breeze hits me, it makes it much more tolerable. There are some days where there is high heat and humidity, and a steady wind. ...
- 41
3
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3
answers
176
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Why do heat waves affect Australia unevenly?
Firstly, I would like to express my deepest condolences to those affected by the extreme heat and catastrophic wildfires on NSW's south coast and in Gippsland (east of Melbourne).
When I was looking ...
- 895
3
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1
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1k
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What is a wind chill formula that will work from -10 C to +50 C and uses wind speed in km/h?
I'm looking for a wind chill formula that will work from -10 °C to +50 °C and uses wind speed in km/h so that I can use this formula to add this element to a weather station I am programming. I don't ...
- 51
3
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1
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709
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Temperature Inversion
According to my environmental management textbook, the conditions necessary for a temperature inversion are:
High air pressure, which causes the upper air to sink
Calm conditions resulting from high ...
- 321
3
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2
answers
138
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Modelling atmospheric temperature as function of elevation
If I have a body that is exposed to light of intensity $I$, then its temperature should follow the ODE
$$\dot{T} = a I - b T^4$$
Mountains are covered with snow, yet $I$ should be the same as at sea ...
- 321
3
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2
answers
4k
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Pressure vs Temperature effect on humidity
I am a bit confused about pressure vs temperature effect on relative humidity.
I know that air density is decreased with altitude, which means that there is more "space" between air ...
- 183
3
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3
answers
1k
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Temperature Advection using finite differences with gridded data
Advection of a scalar quantity, such as temperature (T), by the horizontal wind, is defined as follows:
$-\textbf{U}\cdot\nabla T$
where $\textbf{U}$ is the horizontal wind vector, $\textbf{U}=(u,v)$...
- 652
3
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1
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170
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Maximum temperature possible on earth on a day
What is maximum temperature that can we have on earth on a single day?
I assume that after a certain limit, radiation and convection would start working strongly to have equilibrium of surroundings.
...
- 31
3
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1
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493
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Relation between Magnitude of Greenhouse Effect and the Concentration of GHGs like $CO_2$
The Average Surface Temperature of the Earth is calculated by the following equation:
$$\sigma T_s^4=\frac{(1-A)\Omega}{4}+\Delta E$$
where,
$\sigma$= Stefan-Boltzmann Constant
$T_s$= Average Surface ...
- 33
3
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1
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899
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Dew-point temperature and absolute humidity
I am looking for a reference (e.g. book, peer-reviewed paper) that asserts that
absolute humidity is "equivalent" to the dew-point temperature.
Such statement should be true, AFAIU. Online, ...
- 133
3
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1
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90
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What are the main differences between the reference temperature and the average air temperature?
Last week when I was dealing with the North American Multi-Model Ensemble (NMME) seasonal forecasting system, a variable named “tref,” or Reference Temperature, caught my attention.
I read some ...
- 33
3
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1
answer
108
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Dynamic meteorology - calculating air temperature based off falling air
I'm not sure if this is the correct place to ask this. Basically I have an exercise in dynamic meteorology that is set up like this:
1 kg of dry air is falling with a constant speed of 0.5 cm / s ...
- 133
3
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0
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346
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Best method for weather station data interpolation with external parameters
I'm part of an organization maintaning a large network of weather stations (~3000 stations) over a European country.
Besides storing data measured from the stations into a database, we also produce ...
- 471
3
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0
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953
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Interpolation and extrapolation of unstructured data in python: memory error
I have 3 arrays, for longitude, latitude and temperature (so the observations are scattered in space). I want to apply interpolation on these data, but also extrapolation. I 've written the code beow, ...
- 285
2
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6
answers
513
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How to design an experiment to quantify back radiation from atmospheric carbon dioxide?
Based on our current knowledge of CO$_2$ and current instrumental techniques, how big would a laboratory sample of air with 400ppm of CO$_2$ need to be in order to quantify the back radiation from CO$...
- 564
2
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5
answers
1k
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Why does relative humidity seem to correlate with high temperature (at least where I live)?
I live in New Jersey. Now that summer is coming on us, temperatures and outdoor relative humidity are both increasing. I've noticed the few years that I've lived here that there seems to be a rough ...
- 303
2
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2
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4k
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What is the relationship between air pressure and temperature?
I'm trying to reconcile a paradox regarding air pressure and temperature.
On the one hand, compressing air heats it up, while expanding it cools it. So density and temperature are proportional.
On the ...
- 123
2
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1
answer
42
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How to download atmospheric/oceanographic data for a given region in the sea?
I am trying to get data of atmospheric temperature, wind intensity and/or atmospheric pressure for a specific region of the sea, since I have ocean bottom pressure data from a fixed instrument (lat,...
- 395
2
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3
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14k
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How to calculate maximum and minimum mean monthly temperatures?
A quite simple question that I hope someone can help me with. I have a massive database of hourly minimum and maximum temperatures, from many automatic weather stations. I need to estimate the average ...
- 83
2
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1
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6k
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Heat at High Altitudes
Why does the temperature of let’s say 85 degrees Fahrenheit in southern California feel hotter at 7,500 ft elevation than it does at sea level?
- 21
2
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1
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93
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Why has the average low for the hottest months in Clearwater Florida about 5 degrees higher than the historical average?
Look up Clearwater Florida on Wikipedia and it gives you the average low for the Months of July and August as being 74.2F. About 3-4 years ago I picked up running as a main hobby and the temperature ...
- 21
2
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1
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129
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Can we change the temperature in atmosphere?
In the laboratory we can maintain the low level temperature like 0 to -13 degrees.
Like that can we do this process in atmosphere. For instance atmosphere temperature is 35 degrees can we change the ...
- 21
2
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1
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224
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Why do tropical areas have low air pressure?
From the question Why are pressure levels raised on warm days?, my understanding is that the air pressure at surface level is not affected by temperature, as the mass of the imagined air column stays ...
- 23
2
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0
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36
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Which atmospheric parameters will give accurate result of electricity consumption of an area by using multiple regression model?
I have a dataset that gives values of
temperature,
Relative humidity
Geopotential
Ozone mass mixing ratio
Potential vorticity
Fraction of cloud cover
Specific cloud ice water content
Specific cloud
...
- 21
2
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0
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163
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Predicting the weather in two months [closed]
EDIT 6/13/2020: Actual Jan average from same website was 50.3 °F, which is even above my one-sigma bound, so I failed badly. What did I miss now that we have hindsight?
On Nov 1, I looked at the ...
- 241
1
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1
answer
6k
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What factors affect daily temperature range?
I was wondering if the difference between the low temp and the high temp depended on just the humidity content and the altitude of a place. Or are there more factors? What about the time of year? How ...
- 351
1
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1
answer
116
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How do I find the temperature of the air mass, and how do I use a t-skew chart?
So the first problem I'm stuck on is this one:
An airmass is moving down a mountain from point A to B. At A the temperature is -10 Celsius and the pressure is 890hPa. At point B the pressure is 1010 ...
- 155
1
vote
1
answer
690
views
Why is the isothermal layer being considered a part of the stratosphere rather than the troposphere or being an independent layer?
At altitudes from 12-20 km (7-12.5 mi) above the midlatitudes the temperature remains constant with altitude (minus 56.5°C in the ISA). This part is usually considered to be in the stratosphere, but ...
- 305
1
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1
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761
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How to calculate rate of change of temperature with pressure in Earth's troposhere?
I was given a problem in a competitive exam from previous year:
Calculate the rate of change of temperature of the Earth's troposphere with pressure ($\frac{dT}{dP}$), given
Scale height, $H$, where $...
- 41
1
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1
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128
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Why are temperatures within a few degrees of the all-time high actually pretty common?
I see from a news report that the all-time high temperature, anywhere on Earth, is 129 F. But temperatures within 10 degrees of that record are not rare, and temperatures within 20 degrees are pretty ...
- 111
1
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1
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223
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How strong is the correlation between the dew point of a town and the seawater temperature next to that town?
For example, the towns that has the highest dew point are usually next to the Red Sea and the Persian Gulf where the seawater temperature exceeds 30 degrees in summer.
- 183
1
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1
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244
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Is there a formula for heat retained by an atmosphere, based on density and composition?
I'm looking for a formula, either precise or an approximation (it's for a video game so it's ok to have somewhat rough numbers), that determines heat retained from the sun by an atmosphere, based on ...
- 333
1
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0
answers
202
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Forecasted temperature in the shade vs. theoretical "feels-like" temperature in the sun
I understand that different objects absorb different amounts of light (blackbody absorption). I wonder how feasible it would be to calculate the approximate temperature in the sun based upon the ...
- 111
1
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0
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51
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Effect on climate of the Earth’s rotation was a week instead of 24 hours
Cross-posted in Worldbuilding.
Curious what the affects on daily temperatures and climate would be if the Earth had a slower rotation, say 84 hours of light and 84 hours of darkness. How extreme ...
- 111
1
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1
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116
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How much average temperature increase in India is due to Urbanisation and population growth?
There is an article on the BBC talking about an alarming increase of heatwaves in India. It also says that:
Average temperatures in India have risen by around 0.7% between 1901 and 2018,
partly due ...
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