scholarly journals CALCULATION MODEL OF SOLAR RADIATION AND LONG WAVE RADIATION IN FOR EXTERNAL ENVIRONMENT : Study on heat load simulation considering thermal effects of external environment Part 1

2001 ◽  
Vol 66 (544) ◽  
pp. 9-15 ◽  
Author(s):  
Yoshiki HIGUCHI ◽  
Mitsuhiro UDAGAWA ◽  
Makoto SATOH ◽  
Ken-ichi KIMURA
Keyword(s):  
Solar Radiation ◽  
Thermal Effects ◽  
Heat Load ◽  
External Environment ◽  
Calculation Model ◽  
Wave Radiation ◽  
Long Wave ◽  
Environment Study ◽  
Load Simulation ◽  
Long Wave Radiation

Transmission of the Total and the Infrared Component of Solar Radiation Through a Smoky Atmosphere

1943 ◽  
Vol 24 (5) ◽  
pp. 201-204 ◽  
Author(s):  
Irving F. Hand
Keyword(s):  
Solar Radiation ◽  
Forest Fires ◽  
Solar Spectrum ◽  
Normal Incidence ◽  
Wave Radiation ◽  
Free Atmosphere ◽  
Simultaneous Measurements ◽  
Long Wave ◽  
Minute Period ◽  
Long Wave Radiation

SUMMARY Immediately before and during the passage of a smoke cloud from forest fires, simultaneous measurements were made of total normal incidence solar radiation and that portion of the solar spectrum longer than 0.7μ. Calculations made of the relative amount of radiation that should be received for both the total and limited components checked closely with the ratios between measurements with a smoke-free atmosphere but showed variance with ratios obtained in the presence of smoke. The range between the maximum and minimum values of total radiation during a ten-minute period in the presence of smoke was 2.3 times as great as the range between the maximum and minimum values of infrared radiation; from which we conclude, as theory implies, that long-wave radiation passes much more freely through an atmosphere containing particles slightly less than one micron in diameter than does the shorter, or visible and ultraviolet radiation.

The heat balance of sheep standing in the sun

1957 ◽  
Vol 8 (3) ◽  
pp. 271 ◽  
Author(s):  
CHB Priestley
Keyword(s):  
Heat Balance ◽  
Heat Load ◽  
The Body ◽  
Wave Radiation ◽  
The Sun ◽  
Convective Heat Loss ◽  
Radiation Exchange ◽  
Long Wave ◽  
The Heat Balance ◽  
Long Wave Radiation

An extension is made of Lee's (1950) original discussion of the heat balance of sheep exposed to a tropical sun. Methods are given for calculating the two quantities, convective heat loss and long-wave radiation exchange, which automatically compensate to a large extent for the added heat load. There appear to be advantages in distinguishing between the heat balance of the fleece and that of the body of the sheep, and this provides a method of estimating the heat conducted to the body as a consequence of the insolation.

The influence of radiative forcing on permafrost temperatures in Arctic rock walls

2020 ◽  
Author(s):  
Juditha Schmidt ◽  
Sebastian Westermann ◽  
Bernd Etzelmüller ◽  
Florence Magnin
Keyword(s):  
Solar Radiation ◽  
Short Wave ◽  
Latitudinal Gradients ◽  
Wave Radiation ◽  
Strong Impact ◽  
Permafrost Degradation ◽  
Long Wave ◽  
Hourly Data ◽  
Set Up ◽  
Long Wave Radiation

<p>Climate change has a strong impact on periglacial regions and intensifies the degradation of mountain permafrost. This can result in instabilities of steep rock walls as rock- and ice-mechanical properties are modified. Besides altitude and the related air temperature, latitude is a crucial factor, as solar radiation has a strong impact on the energy transfer processes from the atmosphere to the ground. It can differ significantly in intensity and time over latitudinal positions and exposures of frozen rock slopes.</p><p>In this project, we suggest improving the parametrization of short-wave and long-wave radiation in thermal models for permafrost degradation. To achieve this, we will analyze temperature data of surface temperature loggers from Southern Norway to Svalbard. In total, 37 loggers were installed between 2010 and 2017. The field sites display enormous latitudinal gradients as well as topographic settings. Furthermore, they provide hourly data, allowing us to set up short-stepped time series for examination of solar radiation angles at varying latitudes.</p><p>The data is used to set up a transient heat-flow model (CryoGrid) to simulate the local thermal regime. The model takes into account varying input of short-wave radiation due to aspect, slope angle and time as well as long-wave radiation under different sky-view factors. Finally, the influence of solar radiation on permafrost degradation in steep rock walls is investigated.</p>

scholarly journals Influência da radiação de onda longa incidente no fechamento do balanço de radiação no modelo SIB2: Estimativas para pastagem no bioma Pampa

2018 ◽  
Vol 40 ◽  
pp. 235
Author(s):  
Daniele Morgenstern Aimi ◽  
Maria Eduarda Oliveira ◽  
Tamíres Zimmer ◽  
Gisele Cristina Rubert ◽  
Vanessa De Arruda Souza ◽  
...  
Keyword(s):  
Experimental Data ◽  
Solar Radiation ◽  
Surface Radiation ◽  
Wave Radiation ◽  
Radiation Balance ◽  
Estimation Equations ◽  
Long Wave ◽  
Energy Gains ◽  
Gains And Losses ◽  
Long Wave Radiation

The balance of radiation represents the energy gains and losses on the surface, and can be estimated by summing the four components of surface radiation (incident and reflected solar radiation, radiation emitted by the surface and emitted by the atmosphere). The SiB2 model represents ecosystems and provides estimates of surface energy changes. In this work, five different incident long wave estimation equations were tested to verify the influence of this component on the closure of the radiation balance for the SiB2 model. The results show the underestimation of the radiation balance of the SiB2 model when compared to the experimental data. Thus, it is inferred the need for calibration of incident long-wave radiation equations for use in models for local simulations.

Insolation and the Prediction of Maximum Temperatures

1941 ◽  
Vol 22 (3) ◽  
pp. 95-102 ◽  
Author(s):  
M. Neiburger
Keyword(s):  
Solar Radiation ◽  
Early Morning ◽  
Lapse Rate ◽  
Wave Radiation ◽  
Maximum Temperature ◽  
Total Solar Radiation ◽  
Atmospheric Layer ◽  
Long Wave ◽  
Maximum Temperatures ◽  
Long Wave Radiation

The amount of energy required to change the lapse rate of an atmospheric layer from one value to another is given by Q = (γ2 − γ1) QI whereis the energy required to change the layer of thickness zo and mean density ρm from isothermal to dry adiabatic conditions. The height to which a given amount of effective insolation will establish an adiabatic lapse rate may be found by means of this formula, given the temperature- height curve in the early morning, and from this the expected maximum temperature may be evaluated. Of the total solar radiation received at the ground, some is reflected, some goes to heat the earth's surface, some is sent back as long-wave radiation, some is used in evaporation, and the remainder is effective in heating the lower layers of the atmosphere. Estimates are made of the amounts used in the first four ways. These amounts subtracted from the average insolation received on clear days leave the effective insolation for changing the lapse rate near the ground. The effective insolation at Chicago is arrived at in this way. Using these values, the maximum temperature was computed for several days when advective change was expected to be slight. The agreement with observation was found to be excellent.

scholarly journals The Influence of Cloudiness on The Net Radiation Balance of A Snow Surface with High Albedo

1974 ◽  
Vol 13 (67) ◽  
pp. 73-84 ◽  
Author(s):  
W. Ambach
Keyword(s):  
Greenland Ice Sheet ◽  
Short Wave ◽  
Mean Value ◽  
Wave Radiation ◽  
Radiation Balance ◽  
Net Radiation ◽  
Long Wave ◽  
Energy Excess ◽  
Overcast Sky ◽  
Long Wave Radiation

The short-wave and long-wave radiant fluxes measured in the accumulation area of the Greenland ice sheet during a mid-summer period are discussed with respect to their dependence on cloudiness. At a cloudiness of 10/10, a mean value of 270 J/cm2 d is obtained for the daily totals of net radiation balance, whereas a mean value of only 75 J/cm2 d is observed at 0/10. The energy excess of the net radiation balance with overcast sky is due to the significant influence of the incoming long-wave radiation and the high albedo of the surface (average of 84%). High values of net radiation balance are therefore correlated with high values of long-wave radiation balance and low values of short-wave radiation balance.

Sign in / Sign up

Export Citation Format

Share Document