Estimating net solar radiation balance from satellite data for the Southern Super-Site of the HAPEX SAHEL Experiment

2002 ◽  
Author(s):  
G.C.K. Wollenweber
Keyword(s):  
Solar Radiation ◽  
Satellite Data ◽  
Radiation Balance

scholarly journals The influence of observed and modelled net longwave radiation on the rate of estimated potential evapotranspiration

2019 ◽  
Vol 67 (3) ◽  
pp. 280-288 ◽  
Author(s):  
Jitka Kofroňová ◽  
Miroslav Tesař ◽  
Václav Šípek
Keyword(s):  
Czech Republic ◽  
Solar Radiation ◽  
Potential Evapotranspiration ◽  
Sunshine Duration ◽  
Longwave Radiation ◽  
Radiation Balance ◽  
Parameter Calibration ◽  
Atmospheric Emissivity ◽  
The Bohemian Forest ◽  
The Difference

Abstract Longwave radiation, as part of the radiation balance, is one of the factors needed to estimate potential evapotranspiration (PET). Since the longwave radiation balance is rarely measured, many computational methods have been designed. In this study, we report on the difference between the observed longwave radiation balance and modelling results obtained using the two main procedures outlined in FAO24 (relying on the measured sunshine duration) and FAO56 (based on the measured solar radiation) manuals. The performance of these equations was evaluated in the April–October period over eight years at the Liz experimental catchment and grass surface in the Bohemian Forest (Czech Republic). The coefficients of both methods, which describe the influence of cloudiness factor and atmospheric emissivity of the air, were calibrated. The Penman-Monteith method was used to calculate the PET. The use of default coefficient values gave errors of 40–100 mm (FAO56) and 0–20 mm (FAO24) for the seasonal PET estimates (the PET was usually overestimated). Parameter calibration decreased the FAO56 error to less than 20 mm per season (FAO24 remained unaffected by the calibration). The FAO56 approach with calibrated coefficients proved to be more suitable for estimation of the longwave radiation balance.

scholarly journals STRUCTURE AND INTERANNUAL DYNAMICS OF THE REGIONAL ECOSYSTEMS RADIATION BALANCE OF THE PLAIN CRIMEA

Ekosistemy ◽  
2021 ◽  
pp. 5-15
Author(s):  
R. V. Gorbunov ◽  
T. Yu. Gorbunova ◽  
V. A. Tabunshchik ◽  
A. V., Drygval
Keyword(s):  
Solar Radiation ◽  
Short Wave ◽  
Radiation Balance ◽  
Total Solar Radiation ◽  
Western Coast ◽  
Climate Data ◽  
Crimean Peninsula ◽  
Wave Part ◽  
Interannual Dynamics ◽  
Landscape Level

The research team calculated the values of the radiation balance elements of the plain Crimea ecosystems on the bases of open databases of climate data and GIS-modeling and, moreover, analyzed their spatial and temporal differentiation. It is revealed that the spatial distribution of the radiation balance is characterized by an increase in values from the center to the coast of the peninsular. It correlates with the spatial differentiation of both total solar radiation and all other elements of the short-wave part of the radiation balance. There is a significant excess of radiation balance values of the plateau landscape level ecosystems over values of the hydromorphic landscape level ecosystems. This difference is determined by the location of selected key areas on the western coast of the Crimean Peninsula, which is characterized by the maximum values of total solar radiation supply. The elements of the long-wave part of the radiation balance change in the opposite direction, compared with the short-wave part of the radiation balance, which is associated with an increase of air temperature and climate continentality in the direction from the coast to the center of the peninsula. Two periods were identified in the interannual dynamics corresponding to the change of the circulatory periods of the Northern Hemisphere. In general, the considered ecosystems are characterized by trends of increasing radiation balance values in conditions of growth of all its elements. Such growth is provided by significant increase of values during the second period compared with the negative trends of radiation balance values for a number of ecosystems in the first one.

scholarly journals Estimation of Solar Resource Based on Meteorological and Geographical Data: Sonora State in Northwestern Territory of Mexico as Case Study

Energies ◽  
2020 ◽  
Vol 13 (24) ◽  
pp. 6501
Author(s):  
Enrique A. Enríquez-Velásquez ◽  
Victor H. Benitez ◽  
Sergey G. Obukhov ◽  
Luis C. Félix-Herrán ◽  
Jorge de-J. Lozoya-Santos
Keyword(s):  
Solar Radiation ◽  
Satellite Data ◽  
Local Governments ◽  
Low Cost ◽  
Research Work ◽  
Source Model ◽  
The State ◽  
Time Data ◽  
The University ◽  
Solar Resource

A model developed at the University of Tomsk, Russia, for high latitudes (over 55° N) is proposed and applied to the analysis and observation of the solar resource in the state of Sonora in the northwest of Mexico. This model utilizes satellite data and geographical coordinates as inputs. The objective of this research work is to provide a low-cost and reliable alternative to field meteorological stations and also to obtain a wide illustration of the distribution of solar power in the state to visualize opportunities for sustainable energy production and reduce its carbon footprint. The model is compared against real-time data from meteorological stations and satellite data, using statistical methods to scrutinize its accuracy at local latitudes (26–32° N), where a satisfactory performance was observed. An annual geographical view of available solar radiation against maximum and minimum temperatures for all the state municipalities is provided to identify the photovoltaic electricity generation potential. The outcomes are proof that the model is economically viable and could be employed by local governments to plan solar harvesting strategies. The results are generated from an open source model that allows calculating the available solar radiation over specific land areas, and the application potential for future planning of solar energy projects is evident.

Assessment of underwater irradiance and absorption of solar radiation at water column from satellite data

2007 ◽  
Author(s):  
Oleg V. Kopelevich ◽  
Sergey V. Sheberstov ◽  
Vladimir I. Burenkov ◽  
Svetlana V. Vazyulya ◽  
Maria V. Likhacheva
Keyword(s):  
Solar Radiation ◽  
Water Column ◽  
Satellite Data ◽  
Underwater Irradiance

Spatial variation and temporal trends of solar radiation over Morocco based on ground observations and CMSAF data records.

2020 ◽  
Author(s):  
Sara Moutia
Keyword(s):  
Solar Radiation ◽  
Satellite Data ◽  
Sunshine Duration ◽  
Temporal Trends ◽  
General Tendency ◽  
Data Sets ◽  
Alternative Source ◽  
In Situ Observations ◽  
Source Of Information

<p>The main advantage of remote sensing products is that they are reasonably good in terms of temporal and special coverage, and they are available in a near real time. Therefore, an understanding of the strengths and weaknesses of satellite data is useful to choose it as an alternative source of information with acceptable accuracy.  On the first hand, this study assesses an Inter-comparison between CMSAF Sunshine Duration (SD) data records and ground observations of 30 data sets from 1983 to 2015. the correlation is very significant and the satellite data fits very closely to in situ observations. On the other hand, trend analysis is applied to SD and Solar Incoming Direct radiation (SID) data, a number of stations show a statistically significant decreasing trend in SD and also SID shows a decreasing trend over Morocco in most of regions especially in summer. The results indicate a general tendency of decrease in incoming solar radiation mostly during summer which could be of some concern for solar energy.</p>

Shipboard Measurements of Aerosol Properties in the Coupled Ocean-Atmosphere System of the Northwest Tropical Atlantic

2020 ◽  
Author(s):  
Tim Bates ◽  
Patricia Quinn
Keyword(s):  
Solar Radiation ◽  
Marine Boundary Layer ◽  
Cloud Condensation Nuclei ◽  
Cloud Droplet ◽  
Lower Atmosphere ◽  
Radiation Balance ◽  
Tropical Atlantic ◽  
Shallow Convection ◽  
Condensation Nuclei ◽  
Aerosol Properties

<p>The fair-weather cumulus clouds, that cover much of the low-latitude oceans, affect the radiation balance of the planet by reflecting incoming solar radiation and absorbing outgoing longwave radiation.  These clouds also drive atmospheric circulation by mixing the lower atmosphere in a process called shallow convection.  This mixing, in turn, affects sea surface temperature and salinity by moderating the air-sea exchange of energy and moisture.  Marine boundary layer (MBL) atmospheric aerosols play a role in the processes described above by scattering and absorbing solar radiation and by serving as cloud condensation nuclei (CCN) thereby influencing cloud droplet concentrations and size; the extent, lifetime, and albedo of clouds; and the frequency and intensity of precipitation. Quantifying the role of aerosols over the Northwest Tropical Atlantic is critical to advance understanding of shallow convection and air-sea interactions.</p><p>MBL aerosol properties were measured aboard the RV Ronald H. Brown during the EUREC4A and ATOMIC field studies in January/February 2020.  Aerosols encountered during the study include background sulfate/sea spray particles and African dust/biomass burning particles.  Aerosol physical, chemical, optical and cloud condensation nuclei properties will be presented and their interaction with local and regional circulation.</p>

Case study of a dust storm over Hyderabad area, India: Its impact on solar radiation using satellite data and ground measurements

2007 ◽  
Vol 384 (1-3) ◽  
pp. 316-332 ◽  
Author(s):  
K.V.S. Badarinath ◽  
Shailesh Kumar Kharol ◽  
D.G. Kaskaoutis ◽  
H.D. Kambezidis
Keyword(s):  
Solar Radiation ◽  
Satellite Data ◽  
Dust Storm
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