Questions tagged [evaporation]

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26 views

How to convert solar radiation into equivalent evaporation

I have come across two (apparently) different equations for this purpose. One is mentioned in BASINS software code here $$Rad\_len [inday^{-1}] = \frac{SolRad[langleysday^{-1}]}{((597.3 - 0.57 * ...
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0answers
38 views

Why estimate evapotranspiration using machine learning techniques while we can calculate it with Penmann monteith equation?

I find many researchers use Machine Learning Techniques and Algorithms to calculate the EvapoTranspiration, while there’s also the Penmann Monteith equation that gives us the result. Does this say we ...
2
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0answers
49 views

is it better to take minimum measure of all measures or the mean of minimum measures as a minimum measure

We have taken the measurments of temperature, humidity, net radiation and pressure in our lab so we can calculate the potential reference EvapoTranspiration. So to find out the potential reference ET ...
2
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1answer
58 views

Deep sea pumps that work on wind power, can they control the weather?

If they used wind power to bring up cold water from far under the ocean in the day time and spray it on prevailing winds going into land, could they make it rain more in arid regions? What weather ...
3
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0answers
18 views

Statistical dependence of mean annual soil evaporation and mean annual precipitation globally

I am studying a simple dynamical system that represents a plant and water system, similar to Klausmeier. In Klausmeier model the mean annual precipitation and the soil evaporation are introduced as ...
3
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1answer
23 views

Data of terrestrial evapotranspiration over large areas?

I have been looking for information regarding the total amount of water that evaporates from terrestrial systems and found some global estimates like this one http://www.waterandclimatechange.eu/...
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1answer
74 views

Is my understanding of saturation and cloud formation correct?

I'm trying to see if I understand the concepts of saturation, vapor pressure and cloud formation correctly. When, at a given temperature and height in the atmosphere, the rate of evaporation and ...
5
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1answer
207 views

When sea water evaporates does it carry small amounts of salt into the atmosphere?

I’m interested to know, because we live near the beach and all the metal on the outside of our house is corroded. My dad says it was from the wind picking up spray from the surf, but I’m not so sure.
5
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2answers
66 views

Sulfate salts of magnesium and sodium

What concentrations of magnesium, sodium and sulfate are needed to precipitate solid MgSO4 and Na2SO4 (let's say evaporation is occurring in a system) I'm assuming probably really high because they ...
0
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1answer
186 views

Sun's Effect on Water Vapor in the Air

If the air temperature remains the same, will adding more sun reduce the amount of water vapor in the air - that is, does the sun have any impact on water vapor in the air when temperature is removed ...
4
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1answer
64 views

Can the formation of gypsum evaporites (sand roses) be simulated in the lab?

Has the process of formation of sand roses been simulated in laboratory conditions, or does it take too long?
2
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2answers
738 views

Where does water vapor go/what does the sun do?

For instance, coastal areas are often foggy in the morning. Then the sun “burns it off”. Where does the moisture go? I’m curious of the star’s (i.e. Sun) influence on evaporation effects.
3
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2answers
1k views

Does negative reference evapotranspiration make sense using FAO Penman-Monteith equation?

I computed the daily reference evapotranspiration $ET_0$ using the Crop evapotranspiration - Guidelines for computing crop water requirements - FAO Irrigation and drainage paper 56. The outputs seems ...
3
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1answer
1k views

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?
3
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1answer
131 views

Recharge calculation for an aquifer

I want to calculate recharge for an aquifer for which I have calculated daily ET by Haude's method and I also have daily precipitation data. How can I calculate recharge per minutes.
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2answers
677 views

How to find/calculate the yearly evaporation of a given area?

What I am asking, is exactly the opposite of the yearly rain. It is well measured and it has century long databases. Consider a given, generally dry area. What I am trying to know: if this area ...
3
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1answer
314 views

Cooling effect by evaporation [closed]

Why exactly does water cool down by evaporation? What happens in this process? How much does it cool down? What's the formula to describe this process?
5
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3answers
595 views

In general, does the presence of vegetation increase/decrease gross water loss (evapotranspiration) compared to barren land (evaporation only)?

I am doing some literature review on desertification. However, I could not find any information related to my question. Based on my knowledge, barren land faced greater heating and wind than vegetated ...
6
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1answer
288 views

A simple formulation to calculate the sequence and rate of salt precipitation in a brine?

Is there a simple formulation to estimate the rate of salt precipitation in a brine given its ion concentrations and the evaporation rate? For example: if we know the concentrations of Cl−, Na+, Mg2+...
2
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1answer
117 views

Possibility to influence oceanic evaporation to protect Sahel/Sahara [closed]

When reading about the projects that want to plant trees on the Sahel-Sahara border, for protection of the Sahel, I wonder what other possibilities there are. Like, would it be possible to influence ...