Earth science, surface energy balance

In summary, to calculate the 24 hour totals equivalent loss of stored soil liquid water expressed in [mm], you need to use the equation Q* = QH + QE + QG and the corresponding data for QH, QE, and QG. The conversion factor for the density of liquid water is 1000 kg/m^3. The data can be found in Table 1, which shows the daily cycle in hourly-averaged energy balance components over grassland in Alberta on 1 July 2003.
  • #1
suedenation
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Given the equation Q* = QH + QE + QG and the corresponding data (all fluxes in [W/m²]). How can I find the equivalent loss of stored soil liquid water expressed in [mm] (Note: the conversion factor is the density of liquid water, i.e. 1000 kg/m^3)

Thanks very much for your help!:confused:
 
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  • #2
First of all, what do you mean by QH, QE, QG? Can you tell us what the terms mean in your equation?

Also, you need to give the question in it's full context.
 
  • #3
i'm sorry, the question is about surface energy balance. Given Q* = QH + QE + QG, QH = sensible heat flux, QE = latent heat flux and QG = ground heat flux. (All fluxes in [W/m²]) and the table below, I've to calculate the 24 hour totals equivalent loss of stored soil liquid water expressed in [mm] (note: the conversion factor is the density of liquid water, i.e. 1000 kg/m^3)
Table 1: Daily cycle in hourly-averaged energy balance components over grassland in Alberta.
1 July 2003. (All fluxes in W m¡2; data courtesy of Dr. L. Flanagan; file flanagan.txt)End time [MDT]
hr Q¤ QG QH QE
1 -77 -17 -117 23
2 -68 -17 -67 11
3 -38 -25 2 -2
4 -37 -29 2 -2
5 -31 -27 -5 -1
6 34 -19 -26 2
7 134 -4 3 72
8 262 13 42 136
9 312 28 60 212
10 438 31 99 272
11 518 45 162 315
12 632 65 213 316
13 633 68 208 339
14 595 61 200 347
15 563 54 167 337
16 347 34 73 278
17 311 28 53 230
18 209 13 -35 139
19 81 1 -52 111
20 -15 -5 -44 55
21 -62 -11 -103 23
22 -63 -14 -106 17
23 -62 -14 -77 12
0 -66 -15 -101 19
 

FAQ: Earth science, surface energy balance

What is surface energy balance?

Surface energy balance is the balance between the incoming energy from the sun and the outgoing energy from Earth's surface. It is an important concept in Earth science as it helps us understand how energy is distributed and exchanged within the Earth's system.

How does surface energy balance affect climate?

Surface energy balance plays a crucial role in determining Earth's climate. Changes in the balance, such as an increase in solar radiation or a decrease in outgoing longwave radiation, can lead to changes in temperature and weather patterns.

What factors influence surface energy balance?

Several factors influence surface energy balance, including solar radiation, albedo (reflectivity), atmospheric composition, and surface properties such as vegetation and land use. Human activities, such as deforestation and the burning of fossil fuels, can also impact the balance.

How is surface energy balance measured?

Surface energy balance is typically measured using instruments such as pyranometers, which measure incoming solar radiation, and pyrgeometers, which measure outgoing longwave radiation. Other measurements, such as surface temperature and humidity, can also provide information about the balance.

What are the implications of changes in surface energy balance?

Changes in surface energy balance can have significant implications for Earth's climate, ecosystems, and human populations. For example, an increase in solar radiation due to a decrease in cloud cover can lead to warming temperatures, while a decrease in outgoing longwave radiation due to an increase in greenhouse gases can contribute to the greenhouse effect and global warming.

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