scholarly journals The Solar Radiation Climate of Greece

Climate ◽  
2021 ◽  
Vol 9 (12) ◽  
pp. 183
Author(s):  
Harry D. Kambezidis
Keyword(s):  
Air Pollution ◽  
Solar Radiation ◽  
Sunspot Cycle ◽  
Absorption Index ◽  
Regression Equations ◽  
Diffuse Fraction ◽  
Global Dimming ◽  
Definition Of ◽  
Negative Linear Relationship ◽  
Of Greece

The solar radiation climate of Greece is investigated by using typical meteorological years (TMYs) at 43 locations in Greece based on a period of 10 years (2007–2016). These TMYs include hourly values of global, Hg, and diffuse, Hd, horizontal irradiances from which the direct, Hb, horizontal irradiance is estimated. Use of the diffuse fraction, kd, and the definition of the direct-beam fraction, kb, is made. Solar maps of annual mean Hg, Hd, kd, and kb are prepared over Greece under clear and all skies, which show interesting but explainable patterns. Additionally, the intra-annual and seasonal variabilities of these parameters are presented and regression equations are provided. It is found that Hb has a negative linear relationship with kd; the same applies to Hg with respect to kd or with respect to the latitude of the site. It is shown that kd (kb) can reflect the scattering (absorption) effects of the atmosphere on solar radiation, and, therefore, this parameter can be used as a scattering (absorption) index. An analysis shows that the influence of solar variability (sunspot cycle) on the Hg levels over Athens in the period 1953–2018 was less dominant than the anthropogenic (air-pollution) footprint that caused the global dimming effect.

Integrating of equations of the Lagrange for definition of disturbances from a solar radiation in orbits of geosynchronous satellites

2010 ◽  
Vol 27 (0) ◽  
pp. 118-125
Author(s):  
В. У. Клімик ◽  
В. П. Єпішев ◽  
І. І. Мотрунич ◽  
В. І. Кудак ◽  
Г. М. Мацо
Keyword(s):  
Solar Radiation ◽  
Definition Of ◽  
Geosynchronous Satellites

Accessing heat: Environmental stigma and ‘porous’ infrastructural configurations in Ulaanbaatar

Urban Studies ◽  
2021 ◽  
pp. 004209802110005
Author(s):  
Rebekah Plueckhahn
Keyword(s):  
Air Pollution ◽  
Heat Generation ◽  
Capital City ◽  
Core Area ◽  
History Of ◽  
Burning Coal ◽  
Definition Of ◽  
The City

This article explores the experience of living among diverse infrastructural configurations in Ulaanbaatar, Mongolia, and forms of stigmatisation that arise as a result. In this capital city that experiences extremely cold winters, the provision of heat is a seasonal necessity. Following a history of socialist-era, centrally provided heating, Ulaanbaatar is now made up of a core area of apartments and other buildings undergoing increased expansion, surrounded by vast areas of fenced land plots ( ger districts) not connected to centrally provided heating. In these areas, residents have historically heated their homes through burning coal, a technique that has resulted in seasonal air pollution. Expanding out from Wacquant’s definition of territorial stigmatisation, this article discusses the links between heat generation, air pollution and environmental stigmatisation arising from residents’ association with or proximity to the effects of heat generation and/or infrastructural lack. This type of stigma complexifies the normative divide between the city’s two main built areas. Residents’ attempts to mitigate forms of building and infrastructural ‘quality’ or chanar (in Mongolian) form ways of negotiating their position as they seek different kinds of property. Here, not only are bodies vulnerable to forms of pollution (both air and otherwise), but also buildings and infrastructure are vulnerable to disrepair. Residents’ assessments of infrastructural and building quality move beyond any categorisation of them being a clear ‘resistance’ to deteriorating infrastructural conditions. Instead, an ethnographic lens that positions the viewpoint of the city through these residential experiences reveals a reconceptualisation of the city that challenges infrastructurally determined normative assumptions.

‘Communal Hellenism’ and ancient tragedy performances in Greece (1975–95): The ritual quest

2021 ◽  
Vol 7 (1) ◽  
pp. 69-103 ◽  
Author(s):  
Efthymios Kaltsounas ◽  
Tonia Karaoglou ◽  
Natalie Minioti ◽  
Eleni Papazoglou
Keyword(s):  
Audience Reception ◽  
Collective Consciousness ◽  
National Theatre ◽  
Modern Greek ◽  
The Press ◽  
Cultural Movements ◽  
Definition Of ◽  
Folk Ritual ◽  
Ancient Drama ◽  
Of Greece

For the better part of the twentieth century, the quest for a ‘Greek’ continuity in the so-called revival of ancient drama in Greece was inextricably linked to what is termed and studied in this paper as a Ritual Quest. Rituality was understood in two forms: one was aesthetic and neoclassicist in its hermeneutic and performative codes, which were established and recycled – and as such: ritualized – in ancient tragedy productions of the National Theatre of Greece from the 1930s to the 1970s; the other, cultivated mainly during the 1980s, was cultural and centred around the idea that continuity can be traced and explored through the direct employment of Byzantine and folk ritual elements. Both aimed at eliciting the cohesive collective response of their spectators: their turning into a liminal ritual community. This was a community tied together under an ethnocentric identity, that of Greeks participating in a Greek (theatrical) phenomenon. At first through neoclassicism, then through folklore, this artistic phenomenon was seen as documenting a diachronic and essentially political modern Greek desideratum: continuity with the ancient past. Such developments were in tune with broader cultural movements in the period under study, which were reflected on the common imaginings of Antiquity in the modern Greek collective – consciousness – a sort of ‘Communal Hellenism’. The press reception of performances, apart from being a productive vehicle for the study of the productions as such, provides indispensable indexes to audience reception. Through the study of theatre reviews, we propose to explore the crucial shifts registered in the definition of Greekness and its dynamic connections to Antiquity.

scholarly journals Is global dimming and brightening in Japan limited to urban areas?

2016 ◽  
Author(s):  
Katsumasa Tanaka ◽  
Atsumu Ohmura ◽  
Doris Folini ◽  
Martin Wild ◽  
Nozomu Ohkawara
Keyword(s):  
Solar Radiation ◽  
Rural Areas ◽  
Urban Areas ◽  
Large Scale ◽  
Temporal Trends ◽  
Surface Radiation ◽  
Surface Solar Radiation ◽  
Decadal Time Scale ◽  
Global Dimming ◽  
Urban And Rural Areas

Abstract. Observations worldwide indicate secular trends of all-sky surface solar radiation on decadal time scale, termed global dimming and brightening. Accordingly, the observed surface radiation in Japan generally shows a strong decline till the end of the 1980s and then a recovery toward around 2000. Because a substantial number of measurement stations are located within or proximate to populated areas, one may speculate that the observed trends are strongly influenced by local air pollution and are thus not of large-scale significance. This hypothesis poses a serious question as to what regional extent the global dimming and brightening are significant: Are the global dimming and brightening truly global phenomena, or regional or even only local? Our study focused on 14 meteorological observatories that measured all-sky surface solar radiation, zenith transmittance, and maximum transmittance. On the basis of municipality population time series, historical land use maps, recent satellite images, and actual site visits, we concluded that eight stations had been significantly influenced by urbanization, with the remaining six stations being left pristine. Between the urban and rural areas, no marked differences were identified in the temporal trends of the aforementioned meteorological parameters. Our finding suggests that global dimming and brightening in Japan occurred on a large scale, independently of urbanization.

scholarly journals Global trends in downward surface solar radiation from spatial interpolated ground observations during 1961-2019

2021 ◽  
pp. 1-56
Author(s):  
Menghan Yuan ◽  
Thomas Leirvik ◽  
Martin Wild
Keyword(s):  
Solar Radiation ◽  
Spatial Interpolation ◽  
Hydrological Cycle ◽  
Explanatory Power ◽  
Surface Solar Radiation ◽  
Global Trends ◽  
Cloud Coverage ◽  
Crucial Component ◽  
Spatial Coverage ◽  
Global Dimming

AbstractDownward surface solar radiation (SSR) is a crucial component of the Global Energy Balance, affecting temperature and the hydrological cycle profoundly, and it provides crucial information about climate change. Many studies have examined SSR trends, however they are often concentrated on specific regions due to limited spatial coverage of ground based observation stations. To overcome this spatial limitation, this study performs a spatial interpolation based on a machine learning method, Random Forest, to interpolate monthly SSR anomalies using a number of climatic variables (various temperature indices, cloud coverage, etc.), time point indicators (years and months of SSR observations), and geographical characteristics of locations (latitudes, longitudes, etc). The predictors that provide the largest explanatory power for interannual variability are diurnal temperature range and cloud coverage. The output of the spatial interpolation is a 0:5° ×0:5° monthly gridded dataset of SSR anomalies with complete land coverage over the period 1961-2019, which is used afterwards in a comprehensive trend analysis for i) each continent separately, and ii) the entire globe.The continental level analysis reveals the major contributors to the global dimming and brightening. In particular, the global dimming before the 1980s is primarily dominated by negative trends in Asia and North America, while Europe and Oceania have been the two largest contributors to the brightening after 1982 and up until 2019.

INFLUENCE OF SOLAR RADIATION AND SOIL MOISTURE ON GROWTH AND YIELD OF CHINOOK WHEAT

1969 ◽  
Vol 49 (6) ◽  
pp. 685-699 ◽  
Author(s):  
C. A. Campbell ◽  
W. L. Pelton ◽  
K. F. Nielsen
Keyword(s):  
Soil Moisture ◽  
Solar Radiation ◽  
Light Intensity ◽  
Crude Protein ◽  
Soluble Sugars ◽  
Moisture Stress ◽  
Growth And Yield ◽  
Regression Equations ◽  
Soil Moisture Stress ◽  
Net Assimilation

The influence of solar radiation on the growth and yield of Chinook wheat was determined in a 5-year field shading study, and a 1-year, 3 × 3 shading × soil moisture lysimeter experiment.In the field, shading with saran mesh reduced solar radiation and wind but had little effect on air or soil temperature. In moist years shade maintained soil moisture at a higher level than no shade. Generally, mean leaf area ratio decreased and mean net assimilation rate and relative growth rate increased linearly with increases in the log of light intensity. There were interactions between shading × years (weather) relative to dry matter yield. The efficiency with which solar energy was used for grain production increased with shading. The effect of shading on crude protein and soluble sugars in grain was variable.In the lysimeter shading study, regression equations were used to relate several plant characters to shading and soil moisture (in the available range). Plant height, stem diameter, days to head, number of tillers, weights of grain and of straw, and percent cellulose were negatively related to soil moisture stress; crude protein was positively related. Days to head and crude protein were negatively related to light intensity, but all the other characters were positively related. The partial regression coefficients indicated that the influence of soil moisture stress was much more important than solar radiation on the crude protein content of the grain.

Solar radiation, air pollution, and bronchiolitis hospitalizations in Chile: An ecological study

2019 ◽  
Vol 54 (9) ◽  
pp. 1466-1473
Author(s):  
Claudia Terrazas ◽  
Jose A. Castro‐Rodriguez ◽  
Carlos A. Camargo  ◽  
Arturo Borzutzky
Keyword(s):  
Air Pollution ◽  
Solar Radiation ◽  
Ecological Study
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