Sentences with phrase «air at a given temperature»

Relative humidity reflects the ratio of the actual pressure of water vapor in a sample of air to the pressure necessary to saturate that air at a given temperature.

Not exact matches

Dust found in the ice gives a record of what was in the air thousands of years ago, whether from volcanic eruptions or human activity, and the isotopic composition of the hydrogen and oxygen molecules in the snow give a record of the temperature of the earth at the time.

And when the ambient cabin lighting gives a subtle glow, when perfume is wafting through the filtered and temperature - controlled air circulating silently as you're driving at the really high speeds the car — if not governments — encourages, you know you're in something really special.

As we found with upgraded Honda models, the navigation system in the Acura is scarily competent at recognizing voice commands; in addition to being able to plot destinations by address or street (with text - to - speech technology giving road - specific turn - by - turn voice guidance), the system allows voice control over the air - conditioning temperature and XM radio channel and will even tell you the time (just say, «What time is it?»).

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Those who might think that a ten year pause in air temperature increases gives us extra time are not looking at the whole picture.

http://climate.nasa.gov/news/1141/: «Norman Loeb, an atmospheric scientist at NASA's Langley Research Center, recently gave a talk on the «global warming hiatus,» a slowdown in the rise of the global mean surface air temperature.

Thirdly, the ideal gas law is of course relevant but in the presence of external sources / sinks of heat is used mainly to determine the density of the air at any point given the temperature and pressure.]

The actual «Wiki» answer is here:» Oranges are sensitive to frost, and a common treatment to prevent frost damage when sub-freezing temperatures are expected, is to spray the trees with water, since as long as unfrozen water is turning to ice on the trees» branches, the ice that has formed stays just at the freezing point, giving protection even if air temperatures have dropped far lower.

«We found that the level of CO 2 had fluctuated greatly over the period but at any given time increases in air temperature preceded higher concentrations of CO 2,» says academician Kapitsa, who worked in Antarctica for many years.

This gives rise to very marked fluctuations in the temperature of the air at the top of the atmosphere.

When people began sending balloons aloft to measure the temperature of the air in the stratosphere they could avoid the influence of solar radiation that was thought to be affecting the readings given by thermometers by sending the balloons up at night.

To point out just a couple of things: — oceans warming slower (or cooling slower) than lands on long - time trends is absolutely normal, because water is more difficult both to warm or to cool (I mean, we require both a bigger heat flow and more time); at the contrary, I see as a non-sense theory (made by some serrist, but don't know who) that oceans are storing up heat, and that suddenly they will release such heat as a positive feedback: or the water warms than no heat can be considered ad «stored» (we have no phase change inside oceans, so no latent heat) or oceans begin to release heat but in the same time they have to cool (because they are losing heat); so, I don't feel strange that in last years land temperatures for some series (NCDC and GISS) can be heating up while oceans are slightly cooling, but I feel strange that they are heating up so much to reverse global trend from slightly negative / stable to slightly positive; but, in the end, all this is not an evidence that lands» warming is led by UHI (but, this effect, I would not exclude it from having a small part in temperature trends for some regional area, but just small); both because, as writtend, it is normal to have waters warming slower than lands, and because lands» temperatures are often measured in a not so precise way (despite they continue to give us a global uncertainity in TT values which is barely the instrumental's one)-- but, to point out, HadCRU and MSU of last years (I mean always 2002 - 2006) follow much better waters» temperatures trend; — metropolis and larger cities temperature trends actually show an increase in UHI effect, but I think the sites are few, and the covered area is very small worldwide, so the global effect is very poor (but it still can be sensible for regional effects); but I would not run out a small warming trend for airport measurements due mainly to three things: increasing jet planes traffic, enlarging airports (then more buildings and more asphalt — if you follow motor sports, or simply live in a town / city, you will know how easy they get very warmer than air during day, and how much it can slow night - time cooling) and overall having airports nearer to cities (if not becoming an area inside the city after some decade of hurban growth, e.g. Milan - Linate); — I found no point about UHI in towns and villages; you will tell me they are not large cities; but, in comparison with 20-40-60 years ago when they were «countryside», many small towns and villages have become part of larger hurban areas (at least in Europe and Asia) so examining just larger cities would not be enough in my opinion to get a full view of UHI effect (still remembering that it has a small global effect: we can say many matters are due to UHI instead of GW, maybe even that a small part of measured GW is due to UHI, and that GW measurements are not so precise to make us able to make good analisyses and predictions, but not that GW is due to UHI).

Generally, for climate purpose, the Earth's temperature is regarded as the average temperature of the air at any given moment and much scientific effort has been put into ascertaining what it is and how the real world arrives at that temperature for the air.

Also, the current theory gives a large discontinuity between the surface temperature and the air temperature at the surface.

Relative humidity is the fraction of water vapour in a small parcel of air relative to the total amount of water vapour the air could contain at the given temperature and pressure.

And they measure air bubbles trapped inside the ice, giving them a nice look at carbon dioxide, nitrous oxide, and methane concentrations back through prehistory, and how they co-vary with temperature.

They measure the hydrogen and oxygen isotopes to infer air temperatures at the time the snow fell, and the dust particles give a nice indication of the dusty periods (much of the dust was kicked up far away, in the Gobi Desert, rather than from sources closer to Greenland).

While I haven't tried this experiment myself, I foolhardedly predict that the resulting mixture will start out as supersaturated air at temperature 280 K and pressure 620 hPa with RH = 200 % (anyone who cares will have no trouble verifying this using only the specific heat numbers I've given earlier, no thermodynamic needed), and (more importantly for thermodynamics) that it will in due course become air at T = 287.7 K and P = 634.5 (higher pressure) with RH = 100 %.

That is exactly the same 290 μatm which one would measure for a static system like a flask in a laboratory at the same temperature given sufficient time to equilibrate with the air above the liquid.

And many of those variables have nothing directly to do air temperature, water temperature, or insolation and yet they can have a marked effect on how much sea ice there is at any given time or during a particular year.

The most of the thermometers measuring temperature at the given position are placed in the air above the ground (please, disregard from what I am writing below if I have misunderstood how the direct stationary temperature measurements are performed).

In the case of dry air and without CO2, the cooling of the radiator is given by h * (T - Ta) where T and Ta are temperatures of the surface and the air layer, respectively, at the given time t. h describes the heat transport from the surface to the layer by radiation and convection.

Given two almost identical parcels of air at the same temperature and pressure, the one with more water vapor will be less dense.

His idea was to divide up a territory into a grid of cells, each with its own set of numbers describing its air pressure, temperature, and the like, as measured at a given hour.

Warmer Temps Likely to Blame The original paper gives a number of examples which show that changes in land use, precipitation, cloudiness and humidity are superimposed on glaciers similar to those of Kilimanjaro, in terms of latitude, and that something else is at work... «most obvious would be warmer air temperatures».

Air temperatures undergo significant daily variations, at times varying unpredictably by more than 20 °C in a given location within a few days.

The sensible temperature of air at the height of a Stevensen screen is a measurement of a heat flow at a given point in time.

The Eve device can sense outdoor temperature, humidity, and air pressure giving you weather data at your home on your Apple device.

It went something like this: hotel check - in, locate room, locate wifi service, attempt connection to wifi, wonder why the connection is taking so long, try again, locate phone, call front desk, get told «the internet is broken for a while», decide to hot - spot the mobile phone because some emails really needed to be sent, go «la la la» about the roaming costs, locate iron, wonder why iron temperature dial just spins around and around, swear as iron spews water instead of steam, find reading glasses, curse middle - aged need for reading glasses, realise iron temperature dial is indecipherably in Chinese, decide ironing front of shirt is good enough when wearing jacket, order room service lunch, start shower, realise can't read impossible small toiletry bottle labels, damply retrieve glasses from near iron and successfully avoid shampooing hair with body lotion, change (into slightly damp shirt), retrieve glasses from shower, start teleconference, eat lunch, remember to mute phone, meet colleague in lobby at 1 pm, continue teleconference, get in taxi, endure 75 stop - start minutes to a inconveniently located client, watch unread emails climb over 150, continue to ignore roaming costs, regret tuna panini lunch choice as taxi warmth, stop - start juddering, jet - lag, guilt about unread emails and traffic fumes combine in a very unpleasant way, stumble out of over-warm taxi and almost catch hypothermia while trying to locate a very small client office in a very large anonymous business park, almost hug client with relief when they appear to escort us the last 50 metres, surprisingly have very positive client meeting (i.e. didn't throw up in the meeting), almost catch hypothermia again waiting for taxi which despite having two functioning GPS devices can't locate us on a main road, understand why as within 30 seconds we are almost rendered unconscious by the in - car exhaust fumes, discover that the taxi ride back to the CBD is even slower and more juddering at peak hour (and no, that was not a carbon monoxide induced hallucination), rescheduled the second client from 5 pm to 5.30, to 6 pm and finally 6.30 pm, killed time by drafting this guest blog (possibly carbon monoxide induced), watch unread emails climb higher, exit taxi and inhale relatively fresher air from kamikaze motor scooters, enter office and grumpily work with client until 9 pm, decline client's gracious offer of expensive dinner, noting it is already midnight my time, observe client fail to correctly set office alarm and endure high decibel «warning, warning» sounds that are clearly designed to send security rushing... soon... any second now... develop new form of nausea and headache from piercing, screeching, sounds - like - a-wailing-baby-please-please-make-it-stop-alarm, note the client is relishing the extra (free) time with us and is still talking about work, admire the client's ability to focus under extreme aural pressure, decide the client may be a little too work focussed, realise that I probably am too given I have just finished work at 9 pm... but then remember the 200 unread emails in my inbox and decide I can resolve that incongruency later (in a quieter space), become sure that there are only two possibilities — there are no security staff or they are deaf — while my colleague frantically tries to call someone who knows what to do, conclude after three calls that no - one does, and then finally someone finally does and... it stops.