 |
|
SRML Glossary — "W"
Special thanks to NREL
We'd like to thank the National Renewable Energy Laboratory for
making available to us their glossary, which is the basis of ours. We've
edited and reformatted it, and linked it to our Web pages, and we'll continue
to add our own specialized terms, illustrations, and examples. Please note that
the Solar Radiation Monitoring Laboratory takes full responsibility for any
inaccuracies that may occur.
Links to other glossary sections:
A B
C D E F
G H I J
K L M N
O P Q R
S T U V
W X Y Z
|
| |
Gaseous water (individual water molecules) in the atmosphere.
|
| |
A unit of
power defined as a joule
per second.
|
| |
A unit of
energy equal to 3600 joules.
|
| |
The distance
between adjacent peaks or troughs of a wave. Wavelengths of light
are typically expressed in terms of Angstroms or nanometers (10-9
meters).
|
| |
The Weather Bureau/Army/Navy identifier of weather stations. This five-digit code is unique to
each weather measurement station in the WBAN system.
|
| |
The state
of the atmosphere at a given time. This includes temperature, humidity,
cloud cover, precipitation type, and presence
of aerosols.
|
| |
Temperature
that is measured by a wet-bulb thermometer, which has a wet cloth sleeve
that covers its bulb. Wet-bulb temperature and dry-bulb
temperature are used to compute relative
humidity.
|
| |
Horizontal motion of air near the surface of the Earth.
|
| |
Polar graphs that indicate the speed and relative duration of wind according to its direction.
Wind roses are useful for determining the most prevalent direction of winds of desired strength.
Wind roses are reported at NREL's
Solar Radiation Research Laboratory.
|
| |
The World Meteorological Organization.
|
| |
The World
Radiometric Reference, which provides the basis for all measurements by
radiometers in the world. Every five years,
many of the best absolute cavity
radiometers undergo an intercomparison at PMOD/WRC
(Davos, Switzerland). The most stable, accurate, and precise instruments
provide the World Radiometric Reference for the coming years. Any credible
radiometer measurement must be traceable to the WRR.
|
| |
The World
Standard Group (WSG) of absolute
cavity radiometers is maintained by the World
Meteorological Organization's (WMO) World Radiation
Center (WRC) (Davos, Switzerland). The WSG is a group of seven well-characterized
absolute cavity radiometers used to define the World
Radiometric Reference (WRR). International intercomparisons of national
standard pyrheliometers with the WSG are held every five years at the WRC
to transfer the WRR to national centers. Having participated in such comparisons
since 1980, NREL has three absolute cavity radiometers directly traceable
to the WRR. The WRR has an uncertainty of less than +/- 0.3%. This means
that the best possible measurements of direct
normal solar irradiance have at least this uncertainty.
|
| |
The Weather
Year for Energy Calculations, a "typical year" used by engineers and architects
of ASHRAE.
|
| |
|
Links to other glossary sections:
A B
C D E F
G H I J
K L M N
O P Q R
S T U V
W X Y Z
© 2022, UO Solar Radiation Monitoring
Laboratory.
Last
revised: April 7, 2022.
Home page URL: solardata.uoregon.edu |
