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What is incoming longwave radiation (LW in)?
Is longwave radiation incoming or outgoing?
What is the contribution of incoming longwave radiation?
Aug 10, 2016 · Heat resulting from the absorption of incoming shortwave radiation is emitted as longwave radiation. Radiation from the warmed upper atmosphere, along with a small amount from the Earth's surface, radiates out to space.
The incoming longwave radiation from the atmosphere is absorbed in the top millimeters, unlike incoming shortwave radiation that penetrates much deeper (Section 5.4.3.2). Thus, the outward longwave radiation is determined by the temperature of the literal surface or skin temperature of the sea, which is less than one millimeter thick.
Jul 25, 2019 · Melting snow and glacier ice in the Himalaya forms an important source of water for people downstream. Incoming longwave radiation (LW in) is an important energy source for melt, but there are only few measurements of LW in at high elevation.
- Remco J. de Kok, Jakob F. Steiner, Maxime Litt, Patrick Wagnon, Patrick Wagnon, Inka Koch, Mohd F. A...
- 2020
- FAO56
- Gridded Longwave
- Satterlund
- Specified Pyrgeograph
The FAO56 method implements the algorithm detailed by Allen, Pereira, Raes, and Smith (1998). The algorithm calculates the solar declination and solar angle for each time interval of the simulation, using the coordinates of the subbasin, Julian day of the year, and time at the middle of the interval. The solar values are used to compute the clear s...
The gridded longwave method is designed to work with the ModClark gridded transform. However, it can be used with other area-average transform methods as well. The most common use of the method is to utilize gridded longwave radiation estimates produced by an external model, for example, a dynamic atmospheric model. If it is used with a transform m...
The Satterlund method (Satterlund, 1979) uses temperature and vapor pressure to estimate incoming longwave radiation. While certain physical limits are enforced, the approach is fundamentally empirical. It provides good estimates under mostly clear skies and continues to perform well even as temperature drops below the freezing point. It has the ad...
A pyrgeometer is an instrument that can measure downwelling longwave radiation. They are not part of basic meteorological observation stations, but may be included at first order stations. This method may be used to import observed values from a pyrgeometer or it may be used to import estimates produced by an external model. The specified pyrgeogra...
May 21, 2022 · The present study proposes a novel method for simultaneous estimation of LST and emissivity at the plot-scale and addresses in detail the consequences of omitting down-welling longwave...
May 14, 2018 · Incoming longwave radiation contributes strongly to year-to-year variability in high latitudes and explains most of the long-term temperature trend. Incoming shortwave radiation is important in the tropics and in middle-to-high latitude during winter.
