Questions tagged [temperature]

An objective measure of hot and cold, typically measured by a thermometer.

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0answers
60 views

Estimating fog incidence based on ocean temperature

In the tropics, say the Caribbean, I have read that there is very often a lot of nighttime and morning fog. I have read that the crucial factors are The ocean temperature Cool nighttime air ...
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2answers
251 views

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

In Paris, actually, it is snowing smoothly and the temperature, according to many sources, is around $\small\sf{9^o}$ Celsius. I had always the feeling that snow is possible when temperature ...
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120 views

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 ...
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Distribution of thermometric devices on earth

In complex climate models, measurements of Earth-based thermometers are used. What is their geographic distribution - historically? Does each measurement get equal weight?
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1answer
890 views

Why does dew accumlate on only one side of my car?

Many days I walk out to my car to go to work and notice my windows are fogged up, I believe due to dew (haha homophones). When I am at my mother's house(O'Fallon, MO), all Windows get fogged up. When ...
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1answer
105 views

The effect of buildings on frost

I have see this morning this curious garden where one part was covered with frost while the other was frost free. Question 1: What are the factor that play a role in this configuration? My guess ...
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Near Future Precipitation and Temperature estimations?

I was wondering if anyone here is familiar with temperature and precipitation estimation? I need to estimate P and T from April to July 2016. I am planning to use excel to do the calculation because ...
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12answers
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Why is the pond in my backyard not frozen when it is -15 °C (5 °F) outside?

I am in O'Fallon, Missouri and today it is -15 °C (5 °F) outside. I was taught water freezes at 0 °C (32 °F). I could understand if it was exactly 0 °C (32 °F) that the water might not be turning to ...
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Base temperature value for European Nordic Countries

I am calculating Heating Degree Days and Cooling Degree Days for European Nordic countries (Norway, Sweden, Finland, Denmark, Estonia, Latvia and Lithuania). On a paper (Benestad 2008) I read that ...
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1answer
1k views

By how much can rain temperature vary from the ground-level air temperature?

I'm guessing that falling rain equilibrates fairly quickly to the temperature of the air it's falling through. However, it isn't always at the exact same temperature, which is why we can get the ...
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2answers
840 views

SST and air temperature differences

I'm trying to understand what causes the sea-surface temperature (in the open ocean and coastal areas) and the air temperature immediately above it to be different. I know very little about the ...
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1answer
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How exactly is the “global average temperature” calculated and how reasonable is this method?

During the recent (2015) Paris climate negotiations there was a lot of talk in the media about "limiting the global temperature increase to 2 degrees Celsius". I keep wondering about what this value ...
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Why doesn't it snow even when it is below freezing?

I know the temperature of a place is determined by various factors, a few of which I can think of are: Altitude, distance from sea, latitude, wind etc. My question is basically regarding latitude. ...
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1answer
111 views

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 ...
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287 views

Does lapse rate apply below sea level?

In many parts of the world there are dry lands below sea level, such as parts of the Netherlands. Since we know that temperature decreases with increasing altitude, does it mean that temperature will ...
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2answers
164 views

Why is the ocean paleotemperature trend downwards?

In The Encyclopedia of Paleoclimatology and Ancient Environments by Vivien Gornitz (2008, Springer) it is found that 50 My ago the sea temperature was about 13ºC above the present value. . AFAIK the ...
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604 views

In the South Atlantic and South-Eastern Pacific regions in tropical latitudes, cyclone does not originate. What is the reason? [duplicate]

Update: Granted the question has been asked in different form; but the answer still escapes me. At one place I read that locations in question have low sea-surface temperature. At ...
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1answer
749 views

Why are there different vertical gradients of temperature in different layers of the atmosphere?

The temperature of the troposphere decreases with altitude whereas it is opposite in the stratosphere and again fluctuates. Why is this so?
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Dew point variation in a day

Is this true? "If there are no weather front or severe weather systems, then the dew point within a single day is fairly constant, no matter how large the day/night temperature variation."
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2answers
263 views

Are Southern Hemisphere 'Polar Blasts' caused by global warming?

The SMH journalist writes about a cold snap hitting the East Coast of Australia in July 2015: Proof of the big chill will be the extent of regions across Tasmania, Victoria and NSW experiencing zero ...
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What are the benefits of using conservative temperature in oceanography?

The new standard for ocean temperature is the "conservative temperature". It is based on a hypothetical adiabatic and isohaline change in pressure to the sea surface. Conservative temperature was ...
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1answer
24k views

Why is the Ocean water on the west Coast so cold comparing to the East coast?

Even at similar latitudes they appear to be quite different from one another.
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GIS Data on climate types

Where can I download GIS data delimiting global climate types? For example mediterannean climate, temperate climate, etc. Additionally, how similar are temperature profiles for various places in the ...
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2answers
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What is Celsius degrees to tenths? [duplicate]

I'm looking at a historical weather data report and the TMAX and TMIN are like this: 44 and -21, the following day 72 and 17. First I thought it was Fahrenheit, but the conversion didn't make any ...
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Why do certain areas on Earth have a higher or lower air pressure at sea level?

For instance, looking at this map of world air pressure in January and this map of July, why do some land surfaces have a higher pressure during the winter? I know that the tropics and Coriolis ...
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2answers
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Digging depth and heat

I have a question about the underground heat at different distances from the core of the Earth. I was wondering if there was a depth at which you can dig that the decrease in heat (as a result of ...
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1answer
996 views

Oscillations in the Keeling curve?

I'm having a slightly difficult time understanding the Keeling curve, pictured here: I understand that carbon dioxide (ppm) is increasing with respect to time, but why is there an oscillation between ...
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1answer
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Deciphering NCDC data

I need US monthly climate data for the years 1992-2012. It would be great to get down to a county level, but by state would be just fine. Every site that I go to inevitably kicks me to the NCDC, but I ...
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2answers
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How does the Sun heat the Earth?

The core of the sun has a temperature of 15,000,000 °C. The surface of the sun has temperature around 5,000 °C. The sun is around 93 million miles (150 million km) away from earth. My Question: With ...
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1answer
497 views

Does earth's size affect the temperature of the poles?

What effect does Earth's size have on the temperature of the north and south poles? If the Earth were larger, or smaller, would this affect those temperatures?
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Is it possible for rivers to freeze completely and stop flowing?

Is it possible for rivers to freeze completely in the winter and stop flowing? Are there known examples of this? If yes, how large can these rivers be and where does the water go? There are several ...
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155 views

Will global climate change alter the interannual and/or intraseasonal variance of temperature and/or precipitation?

A quick skim of the regional chapters in AR5 shows predicted changes to average temperature and precipitation. If I understand (in rough terms) the modelling methodologies used, a variety of models (...
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1answer
173 views

Sudden Localized Surface Water Temperature Increase In Eastern Lake Superior, Canada

As can be seen in the below sequence of NOAA images spanning 15 hours (most recent at top), in extreme eastern Lake Superior the surface water (but not bottom water) temperature increased dramatically ...
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1answer
821 views

Dry atmospheric temperature profile (dry adiabatic vs. isothermal)

I'm trying to understand why there are differing predictions of the atmospheric temperature profile. It is well established that the dry adiabatic lapse rate (DALR) is: $$ \frac{\mathrm{d}T}{\mathrm{...
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1answer
3k views

Are cloudy nights warmer than nights without clouds?

I have noticed this winter that nights without clouds (especially when the 12h before the night where not cloudy) were way colder than the cloudy ones. It makes sense to me because the clouds can ...
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2answers
8k views

Is the temperature (even a bit) warmer in a forest?

Is the temperature (even a bit) warmer in a forest? For example, there no frost on the ground in a forest when there is some in a field just outside the forest. Is it because the temperature is a bit ...
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1answer
483 views

What do the researchers in Antarctica wear if they must go outside during winter? [closed]

The Vostok station can observe temperatures as low -90 C during winter. Human skin gets frozen wounds on the spot on direct contact with such cold air and precautions must be made to avoid open ...
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1answer
143 views

Why does air seem to affect local surface temperatures so much?

Last winter, several areas in the US and Canada were hit by a "polar vortex." I happen to live in one of those areas and was amazed how much the temperature seemed to change so suddenly just because a ...
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2answers
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Where can I find a table of ocean temperature pressure and depth

What type of data is available for ocean depth and density? For instance, are there measurements of density near Greenland or Antarctica that could be compared to the central Pacific? It would be ...
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1answer
261 views

Resources to determine temperature probability for a given location on a given date

What tools or resources are available (free) on the web to determine the probability of a given point on the earth to be at or above (or below) a specific temperature on a specific date. Some [...
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2k views

What happens to global temperature when we stop all the vehicles for a year?

I know this is a very simple or naive question but am just being curious. How would the global temperature change if all vehicles stopped for a whole year?
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1answer
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Why is colder seawater more compressible?

I know compressibility is related to the pressure and temperature of the water parcel, but what is the physical/molecular reason as to why colder water is more compressible?
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Does the long-term ice-core temperature record provide reasonable evidence that the current temperature trend is not anthropogenic?

When looking at the long term ice-core temperature record, it very clearly shows a ~100,000 year cyclical trend with warming spikes and gradual cooling. To the untrained eye, it seems that such a ...
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1answer
679 views

Temperature as a function of luminosity and greenhouse gas concentrations

The evidence seems clear that there is an interrelationship between solar luminosity, greenhouse gas concentrations, and temperature. Has temperature as a function of luminosity and greenhouse gas ...
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1answer
259 views

Odd structures in 66 year NCEP daily temperature reanalysis

I have done some simple analyses of historical surface temperature from the NOAA NCAR/NCEP reanalysis (downloaded from ftp://ftp.cdc.noaa.gov/Datasets/ncep.reanalysis.dailyavgs/surface/air.sig995.*.nc)...
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1answer
486 views

How can I downscale daily values of relative humidity?

I have a dataset (The ISIMIP interpolation of CMIP5 output) that contains daily values of the following variables: ...
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2answers
6k views

July/August hottest months (northern hemisphere): because of continued warming or other effects?

In the northern hemisphere, July and August are the hottest months statistically1, but the days start shortening after June 21st. Is this just because the Northern Hemisphere keeps heating up after ...
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3answers
244 views

Is it right practice to validate temperature data with reanalysis data?

For a project I am working on I received raw data from many meteorology stationes. Is it right practice to test this data against air temperature from noaa's ncep/ncar data?
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Where can I get archived hourly temperature data?

I am looking for historical hourly temperature data from many cities in the US what other data sources are there except wunderground? UPDATE: I will use the data to compare stations from the same ...
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5answers
4k views

How to reduce the atmospheric temperature artificially?

Is there any gas/substance which absorbs/reduces atmospheric temperature? Ozone filters UV rays from the sun light and allows in infrared rays. In my knowledge these infrared rays are the cause of ...