Is the sea level pressure the same as the barometric pressure (air pressure)?

Question

I'm a student, and I want to know pressures because when I check WFAA Weather, it shows the barometric pressure in a line graph, but it's hard to see what the pressure is. When I scroll down, it shows the sea level pressure, and it's around the mark of the barometric pressure (29.0 - 31.0).

Answer 1

The air pressure (atmospheric pressure) over a place wil be the same as the sea level pressure provided that place is situated at the sea level.On the other hand ,if the place is situated at a height from the sea level(say, over a hill),then both will be different.However you can use the air pressure over that place and find out what would be the pressure if the place were to be on sea level and you can see that the both the values differ. The sea level pressure,thus got, usually will be more than that taken at the higher place.

Answer 2

Barometric pressure is the pressure recorded by a barometer, wherever it is located. If it is high up a mountain, it reads low and to make sense of the reading meteorologists apply a correction to make it equivalent to the barometric pressure at sea level. It is likely the graph you are looking at is already corrected [sea level pressure is the same as corrected barometric pressure]

Answer 3

It's measured in atmospheres wx :)

Sea level pressure can also refer to simply the pressure of the atmosphere at sea level, which when compared to the standard gives you an idea of what's going on. Standard sea level pressure is 29.92" of mercury, or essentially barometric pressure. If it's above that, say 30.05, you have higher pressure, and if it's below that, 29.89, you have lower pressure. Generally speaking.

Answer 4

Maybe your air in the alps is colder, hence more dense, thus causing a higher barometric pressure reading. Also if in england there are a lot of low pressure systems bringing rain to the area, this shows up as low pressure Sunny areas are usually hi pressure areas.

Answer 5

No, sea level pressure is pressure exerted beneath sea level. I can't recall the units its measured it. So they differ by the means of this: sea level pressure basically means pressure exerted by the sea while beneath sea level while air or barimetric pressure is pressure exerted by the air to the ground.

Answer 6

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Interesting question, my friend! I know nothing about geology but meteorology has been my lifetime hobby and ... I am 61 years old! :-) Fog above lakes, ponds and creeks happen when there is a high pressure. The air from above sinks and warms up by the adiabatic effect of a higher pressure. Because of that, the air is warmer above than under. This is called an inversion. During a high pressure, there is very little wind and the colder air from the top of the hills sinks down in the valleys at night. Sometimes it even creates light wind called a katabatic wind. Lakes, ponds and creeks are, of course, at the bottom of the valleys and as moisture always mix with the air, right above them, when the temperature falls below dew point, at night or early morning, fog forms. But I'll venture in unknown terrain: caves. You say they are warmer than the average atmospheric temperature at the surface. You say that, when it rains, water runs in and create a moist and warm environment in the caves. Will it "smoke" as seen from the surface? I don't think so. True, warm air rises and warm moist air that rises into colder one will form condensation as colder water can't contain as much moisture as warm one. As an example, at the average temperature of 15 C at sea level, a cubic meter of air can't contain more than 13 grams of water. The relative humidity is then 100 percent and if it cools even further, condensation into tiny water droplets must happen. But if the temperature in the cave is higher than at the surface, it means that circulation is limited; otherwise it would be colder since colder air sinks in an open environment. Of course, some warm moist air will always escape and, perhaps form some form of fog, but just like your breath in cold weather, that dissipates very fast and I don't think you will be able to observe anything. Here is an example of how cold air sinks. Here, in Norway, we learn that, when going mountain skiing, we should always take a spade with us because, if caught in bad weather, there is only one way to survive; dig a hole in the snow, go in it and stay there until the storm is over. But here is the trick: Cut a shelf at a hight in the snow hole and lay there, keeping an opening at the bottom of the hole. This is because cold air sinks to the bottom and you will be warmer on the shelf. Incidentally, I own and fly a little aircraft and I'd gladly take you with me to observe caves but ... I live in Norway! :-)