Wszystkie pola: atmospheric radiation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Solar irradiance forecasting based on long-wave atmospheric radiation
Autorzy:: Piątek, M.
Trajer, J.
Czekalski, D.
Powiązania:: https://bibliotekanauki.pl/articles/298472.pdf
Data publikacji:: 2015
Wydawca:: Uniwersytet Warmińsko-Mazurski w Olsztynie
Tematy:: artificial neural networks
irradiance forecasting
cloudiness
Opis:: This work contains information concerning long-wave atmospheric radiation. Artificial neural networks were developed to forecast total mean hourly irradiance based on long-wave atmospheric radiation as cloudiness indicator. It was proved that using this variable in models for forecasting irradiance is wellgrounded. The proof was based on the neural networks sensitivity analysis. It was proved that neural network model is capable to utilize information carried by long wave atmospheric radiation only when the air temperature is provided as additional explanatory variable.
Źródło:: Technical Sciences / University of Warmia and Mazury in Olsztyn; 2015, 18(1); 27-36
1505-4675
2083-4527
Pojawia się w:: Technical Sciences / University of Warmia and Mazury in Olsztyn
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Bilans radiacyjny w rejonie Kaffioyry (NW Spitsbergen) w sezonie letnim 2010 roku
Radiation balance in the Kaffioyra region (NW Spitsbergen) in the summer season 2010
Autorzy:: Kejna, M.
Przybylak, R.
Araźny, A.
Powiązania:: https://bibliotekanauki.pl/articles/260983.pdf
Data publikacji:: 2011
Wydawca:: Stowarzyszenie Klimatologów Polskich
Tematy:: bilans radiacyjny
promieniowanie słoneczne
promieniowanie atmosfery
promieniowanie ziemi
Spitsbergen
Kaffioyra
radiation balance
solar radiation
atmospheric radiation
long-wave radiation
Opis:: W artykule przedstawiono wyniki rejestracji składowych bilansu promieniowania na 3 stanowiskach: Kaffioyra-Heggodden (KH), Lodowiec Waldemara-czoło (LW1) i Lodowiec Waldemara-pole firnowe (NW Spitsbergen) w okresie od 16.07 do 31.08.2010 r. Pomiary prowadzono przy pomocy Radiometru CNR4 firmy Kipp&Zonen. Co minutę rejestrowano natężenie promieniowania słonecznego K?, promieniowania odbitego (K?), promieniowania ziemi (L?) i promieniowania zwrotnego atmosfery (L?). Na tej podstawie obliczono bilans radiacyjny (Q*), składający się z bilansu krótkofalowego (K*) i długofalowego (L*). Stwierdzono niewielkie różnice pomiędzy stanowiskami KH i LW2 założonymi na podłożu morenowym. Najmniej korzystny Q* wystąpił na LW2 nad powierzchnią śnieżno-lodowcową charakteryzującą się wysokim albedo. W artykule zbadano zróżnicowanie przestrzenne składowych bilansu radiacyjnego z dnia na dzień oraz w cyklu dobowym.
Measurements of radiation balance (Q*) were carried out in the Kaffioyra region (NW Spitsbergen) between 16 July and 31 August 2010 at three stations with different surfaces: KH on the glacial moraine of the Aavatsmark (11.5 m a.s.l.), LW1 - on the terminal moraine of the Waldemar Glacier (130 m a.s.l.), and LW2 - on the firn field of the Waldemar Glacier (375 m a.s.l.) - Fig. 1. A Kipp&Zonen CNR 4 Net Radiometer was used to register - minute by minute - the short wave radiation balance (K*), which is the difference between incoming solar radiation K? and reflected solar radiation (K?), and the long wave radiation balance (L*), which is the difference between downward long wave atmospheric radiation (L?) and upward long wave radiation (L?) - Table 1. In the studied period the maximum intensity of incoming solar radiation reached 709.4 W.m-2 at KH, 882.1 W.m-2 at LW1 and 836.2 W.m-2 at LW2. The mean diurnal sums of incoming solar radiation ranged from 11.04 MJ.m-2 at KH to 10.46 MJ.m-2 at LW1 and 10.60 MJ.m-2 at LW2 (Table 2, Fig. 2). The surface albedo varied, reaching between 13% (LW1) and 15% (KH) on the moraines, and up to 61% (LW2) on the firn field (Table 2, Fig. 3). Thus the lowest value of short wave radiation balance, +4.31 MJ.m-2, was registered at LW2, whereas it was doubled on the moraines: KH +9.50 MJ.m-2 and LW1 +9.09 MJ.m-2 (Table 4, Fig. 4). The flux of downward long wave atmospheric radiation coming from the atmosphere does not reveal any significant differences between individual stations: KH: 27.26 MJ.m-2, LW1: 27.47 MJ.m-2 and LW2 - 27.37 MJ.m-2 in 24h (Table 3). The Earth's surface (upward long wave radiation) was losing, on average: 30.31 MJ.m-2, 29.88 MJ.m-2 and 30.10 MJ.m-2, respectively, and the mean daily values of long wave radiation balance were negative: KH -3.05 MJ.m-2, LW1 -2.42 MJ.m-2 and LW2 -2.73 MJ.m-2. The surface radiation balance (Q*) was the most favourable on moraine bases: LW1 +6.67 MJ.m-2, KH +6.45 MJ.m-2, whereas the snow-covered firn field received the smallest amount of energy: LW2 +1.58 MJ.m-2 (Table 4, Fig. 5). In spite of the polar day, the diurnal cycle of the radiation balance components appears symmetrical with regard to the solar noon, related to the elevation of the sun over the horizon and the temperature of the surface and of the atmosphere. The flux of incoming solar radiation reached its peaks during midday hours with the following mean values: KH: 278.7 W.m-2, LW1: 275.9 W.m-2, and LW2: 295.2 W.m-2 (Fig. 6). At the time of lower culmination of the sun the values of K* were falling to zero. The balance of long wave radiation was negative and reached its highest values around midday hours (KH -50.0 MJ.m-2, LW1 -40.1 MJ.m-2 and LW2 -47.5 MJ.m-2). Q* was the highest in midday hours, when it was 2.5 times higher for moraine bases (KH +194.8 MJ.m-2 and LW1 +201.5 MJ.m-2) than for snow and glacial surfaces (LW2 +79.1 MJ.m-2). At low elevation of the sun Q* became negative: KH -6.8 MJ.m-2, LW1 -5.4 MJ.m-2 and LW2 -19.4 MJ.m-2. On individual days the diurnal cycle of the components of Q* was affected not only by the elevation of the sun, but also by the atmospheric state and the presence of clouds, in particular. For example, on 27 and 28 July 2010 a different weather types occurred (Table 5, Fig. 7). On the first day the sky was completely overcast with St and Sc clouds and no sunshine was observed. On the following day it cleared up with partial cloudiness (Cu, Ac, Ci), and the sunshine duration reached 16.2 h. On 27 July a slight influx of incoming solar radiation was registered (mean intensity 68.6 W.m-2, diurnal sum 5.92 MJ.m-2), K* was 5.14 MJ.m-2, and L* -0.84 MJ.m-2 due to the total cloudiness, which supported substantial downward atmospheric radiation (downward long wave atmospheric radiation 339.3 W.m-2). On the other hand, on 28 July, when the amount of cloudi-ness was moderate, the maximum intensity of incoming solar radiation was 668.7 W.m-2. In 24 hours the total radiation that reached the surface amounted to 22.04 MJ.m-2, and K* increased to 18.90 MJ.m-2. L* was negative (-5.26 MJ.m-2) due to substantial radial emittance of the ground (upward long wave radiation 352,0 W.m-2) and some downward atmospheric radiation (downward long wave atmospheric radiation 291.1 W.m-2). However, the overall radiation balance was three times higher than on 27 July and amounted to 13.65 MJ.m-2. In the studied period, the individual components of Q* were decreasing in value, as a result of the lower and lower elevation of the sun over the horizon and the ending of the polar day.
Źródło:: Problemy Klimatologii Polarnej; 2011, 21; 173-186
1234-0715
Pojawia się w:: Problemy Klimatologii Polarnej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Structural Changes in the Furan Resins by UV Radiation and Atmospheric Air
Autorzy:: Bobrowski, A.
Powiązania:: https://bibliotekanauki.pl/articles/381893.pdf
Data publikacji:: 2015
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: furan resins
furfuryl alcohol
structural changes
spectroscopy FTIR
spectrum FTIR
żywice furanowe
alkohol furfurylowy
zmiany strukturalne
spektroskopia FTIR
widma FTIR
Opis:: In this paper, the results of research of structural changes that occur during in furan resins with different content of furfuryl alcohol by UV radiation and atmospheric air are presented. The research was carried out by transmission method (KBr pellets), using FTIR spectrometer Excalibur 3000 for the three samples of furan resins with different content of furfuryl alcohol. As a result of UV radiation and oxidizing atmosphere only the sample of the resin Kaltharz 8616 remained liquid. Two others (Kaltharz U 404 and Kaltharz 8117) were cured after 1
Źródło:: Archives of Foundry Engineering; 2015, 15, 1 spec.; 5-8
1897-3310
2299-2944
Pojawia się w:: Archives of Foundry Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Saturation of the absorption of thermal radiation by atmospheric carbon dioxide
Nasycenie procesu absorpcji promieniowania termicznego w atmosferycznym dwutlenku węgla
Autorzy:: Kubicki, Jan
Kopczyński, Krzysztof
Młyńczak, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/408638.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:: greenhouse gas
radiation process
Schwarzschild equation
climate sensitivity
gaz cieplarniany
proces radiacyjny
równanie Schwarzschilda
wrażliwość klimatyczna
Opis:: The article presents a concise review of the works concerning the impact of an increase ofthe concentration of carbon dioxide in the atmosphere on the increase ofits absorption of thermal radiation. Attention was paid to differences in the results of calculations presented in the works byvarious authors. Experimentalverification was carried out, which confirmed the possibility of saturation of the process of thermal radiation absorption byCO2in the atmosphere. Possibilities of improving climate models by using direct measurement results ofexperimental works were pointed out.
W artykule przedstawiono zwięzły przegląd prac dotyczących wpływu wzrostu stężenia dwutlenku węgla w atmosferze na wzrost w niej absorpcji promieniowania termicznego. Zwrócono uwagę na różnice wyników obliczeń w pracach różnych autorów. Przeprowadzono weryfikację eksperymentalną, która potwierdziła możliwość nasycenia się procesuabsorpcji promieniowania termicznego dla CO2w atmosferze. Wskazano możliwości doskonalenia modeli klimatycznych poprzez wykorzystywanie bezpośrednich wyników pomiarów w pracach eksperymentalnych.
Źródło:: Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2020, 10, 1; 77-81
2083-0157
2391-6761
Pojawia się w:: Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Observational evidence for human impact on aerosol cloud-mediated processes in the Baltic region
Autorzy:: Kruger, O.
Powiązania:: https://bibliotekanauki.pl/articles/48934.pdf
Data publikacji:: 2014
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: aerosol
cloud
human impact
radiation
sulphur dioxide
sulphur emission
nitrogen oxide emission
ammonia emission
atmospheric circulation
solar radiation
Baltic region
Źródło:: Oceanologia; 2014, 56, 2
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Passive cooling through the atmospheric window for vehicle temperature control
Autorzy:: Khan, Umara
Zevenhoven, Ron
Powiązania:: https://bibliotekanauki.pl/articles/1955001.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: thermal radiation
passive cooling
vehicle skylight
greenhouse effect
computational fluid dynamics
Opis:: One of the most energy-intensive activities for a vehicle is space air conditioning, for either cooling or heating. Considerable energy savings can be achieved if this can be decoupled from the use of fuel or electricity. This study analyzes the opportunities and effectiveness of deploying the concept of passive cooling through the atmospheric window (i.e. the 8– 14 nm wavelength range where the atmosphere is transparent for thermal radiation) for vehicle temperature control. Recent work at our institute has resulted in a skylight (roof window) design for passive cooling of building space. This should be applicable to vehicles as well, using the same materials and design concept. An overall cooling effect is obtained if outgoing (long wavelength greater than 4 nm) thermal radiation is stronger than the incoming (short wavelength less than 4 nm) thermal radiation. Of particular interest is to quantify the passive cooling of a vehicle parked under direct/indirect sunlight equipped with a small skylight, designed based on earlier designs for buildings. The work involved simulations using commercial computational fluid dynamics software implementing (where possible) wavelengthdependency of thermal radiation properties of materials involved. The findings show that by the use of passive cooling, a temperature difference of up to 7–8 K is obtained with an internal gas flow rate of 0.7 cm/s inside the skylight. A passive cooling effect of almost 27 W/m2 is attainable for summer season in Finland. Comparison of results from Ansys Fluent and COMSOL models shows differences up to about 10 W/m2 in the estimations.
Źródło:: Archives of Thermodynamics; 2021, 42, 3; 25--44
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: A model-measurements comparison of atmospheric forcing and surface fluxes of the Baltic Sea
Autorzy:: Rudolph, C.
Lehmann, A.
Powiązania:: https://bibliotekanauki.pl/articles/48268.pdf
Data publikacji:: 2006
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: coupled sea-ice-ocean model
surface flux
temperature
pressure
radiation flux
heat flux
air-sea interaction
Baltic Sea
wave radiation
Opis:: Observed basic meteorological quantities, heat and radiation fluxes from three different measurement stations in the Baltic Sea are compared with model data of the coupled sea-ice-ocean model BSIOM in order to evaluate the atmospheric forcing, corresponding surface fluxes and the sea surface response. Observational data weremade available from the BASIS winter campaigns in 1998 and 2001 as well as from the r/v ‘Alkor’ cruise in June 2001. Simulated fluxes were calculated from prescribed atmospheric forcing provided from the SMHI meteorological database and modelled sea surface temperatures. The comparison of these fluxes with observations demonstrates a strong correlation, even though mean differences in sensible heat fluxes range from 4 to 12 W m−2 in winter and −25 W m−2 in the June experiment. Differences in latent heat fluxes range from −10 to 23 W m−2. The short-wave radiation flux used as model forcing is on average 15 W m−2 less than the corresponding observations for the winter experiments and 40 W m−2 for the June experiment. Differences in net long-wave radiation fluxes range from −5 to 12W m−2 in winter and −62W m−2 for the June experiment. The correspondence between measured and calculated momentum fluxes is very high, which confirms the usability of our model component for calculating surface winds and wind stresses from the atmospheric surface pressure.
Źródło:: Oceanologia; 2006, 48, 3
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Longwave radiation budget at the Baltic Sea surface from satellite and atmospheric model data
Autorzy:: Zapadka, T.
Krezel, A.
Wozniak, B.
Powiązania:: https://bibliotekanauki.pl/articles/47597.pdf
Data publikacji:: 2008
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: air temperature
sea surface
heat budget
Baltic Sea
temporal analysis
spatial analysis
long-wave radiation
cloud cover
model data
Opis:: The net longwave radiation flux LW↑↓ in the Baltic Sea in 2001 has been subjected to spatial and temporal analysis. Maps of the mean monthly LW↑↓ over the Baltic were drawn using the new semi-empirical formula for the Baltic Sea (Zapadka et al. 2007). The input data for the formula, such as sea surface and air temperatures, and cloud cover, were obtained from the Tiros N/NOAA and METEOSAT 7 satellites and from the UMPLfo recast model (see http://meteo.icm.edu.pl). The mean annual LW↑↓ for 2001 was estimated at 63 W m−2 and compared with available data from other sources. The monthly maps of the net flux LW↑↓ over the Baltic show that the total values reach a minimum (LW↑↓≈50 W m−2) in April, September, October and a maximum (LW↑↓≈80 W m−2) in November. The statistical error of daily maps, on which the monthly maps were based, is no more than 18 W m−2.
Źródło:: Oceanologia; 2008, 50, 2; 147-166
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Struktura bilansu promieniowania słonecznego w Ny-Alesund (NW Spitsbergen) w latach 1989-2003
Structure of solar radiation balance in Ny-Alesund (NW Spitsbergen) in the period 1989-2003
Autorzy:: Budzik, T.
Powiązania:: https://bibliotekanauki.pl/articles/260647.pdf
Data publikacji:: 2004
Wydawca:: Stowarzyszenie Klimatologów Polskich
Tematy:: promieniowanie słoneczne
Spitsbergen
cyrkulacja atmosferyczna
solar radiation
atmospheric circulation
Opis:: This case describes structure of solar radiation balance in Ny-?lesund, Spitsbergen, basing on twenty-four-hour?s magnitudes in 1989-2003. We put to the analysis each radiation streams: shortwave and longwave. Basing on it one year?s and monthly balances were estimated: (K*, L*, Q*). The radiation data used in this article are derieved from: Norsk Polarinsitutt in Oslo: Hisdal, Finnekasa and Vinje (1992) and Hisdal and Finnekasa (1996); 'The Alfred Wegener Institute for Polar and Marine Research': Koenig-Langlo and Marx (1997). The data of clouds from Ny-Alesund are derieved from: Climatolology Division, Norwegian Meteorological Institute, Norway. In 1989-2003 period - annual radiation balance Q* in whole spectrum was oscillating from - 71 MJ/m2 to 194 MJ/m2, average Q* was 57 MJ/m2. Highest values of Q* in year are recorded on June, July - average - 210-260 MJ/m2, lowest on polar night period -October-February (-87 MJ/m2 to -100 MJ/m2). Short-wave radiation balance K* was depending on sun level, sculpture of the earth?s surface and cloudiness modify amount of downward sun energy. Yearly balance sums of short-wave radiation K* was oscillating from 931 MJ/m2 to 1438 MJ/m2, average -1178 MJ/m2. Yearly course of stream K and balance K* shows maximum from April to August and zero values in November-February period. Analyzing many year?s estimation -highest yearly sum of K stream - 2634 MJ/m2 - was recorded on 1993 and lowest - 2157 MJ/m2 on 1990, average of sums in this period was - 2402 MJ/m2. Average yearly balance of L* was 1120 MJ/m2 on 1989-2003 period. Annual balance sums were oscillating from -936 MJ/m2 to -1265 MJ/m2.
Źródło:: Problemy Klimatologii Polarnej; 2004, 14; 189-197
1234-0715
Pojawia się w:: Problemy Klimatologii Polarnej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Struktura bilansu promieniowania słonecznego na obszarze Lodowca Avatsmarka w dniach 13 IV - 04 V 2002 r.
Structure of solar radiation balance on Avatsmark Glacier in the period of 13 IV - 4 V 2002
Autorzy:: Budzik, T.
Powiązania:: https://bibliotekanauki.pl/articles/260822.pdf
Data publikacji:: 2003
Wydawca:: Stowarzyszenie Klimatologów Polskich
Tematy:: Spitsbergen
promieniowanie słoneczne
cyrkulacja atmosferyczna
solar radiation
atmospheric circulation
Opis:: It was carried out an analysis of solar radiation balance for a chosen active surface (glacier). The basis was meteorological data, which was recorded by an automatic weather station in the period of 13.04.2002 - 04.05.2002 in the area of Aavatsmark glacier (NW Spitsbergen). The individual radiation fluxes were analysed and balances and also diurnal sums were calculated on the basis of them. It was set the individual values of radiation balance against chosen meteorological parameters. These results were compared with the data from the nearby weather station in Ny-Alesund.
Źródło:: Problemy Klimatologii Polarnej; 2003, 13; 151-160
1234-0715
Pojawia się w:: Problemy Klimatologii Polarnej
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Seasonal variability in the optical properties of Baltic aerosols
Autorzy:: Zdun, A.
Rozwadowska, A.
Kratzer, S.
Powiązania:: https://bibliotekanauki.pl/articles/48230.pdf
Data publikacji:: 2011
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: seasonal variability
optical property
Baltic aerosol
aerosol optical thickness
wavelength
meteorological factor
atmospheric aerosol
solar radiation
Baltic Sea
seasonal cycle
Źródło:: Oceanologia; 2011, 53, 1
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Imprints of atmospheric waves on the Black Sea surface in data of ocean color scanners
Autorzy:: Evdoshenko, M.A.
Powiązania:: https://bibliotekanauki.pl/articles/2079182.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: remote sensing
ocean optics
Black Sea
sea surface
synthetic aperture radar
microwave radiation
boundary layer
satellite observation
Opis:: Data from MERIS onboard Envisat and MODIS onboard Terra and Aqua for 15–16 May 2010 were used to study powerful imprints of atmospheric gravity waves (AGWs) on the western part the Black Sea surface. Two cold fronts crossed the sea following the warm front and caused the AGWs which modulated the sea surface. Imprints of AGWs appeared as stripes of alternating brightness, they had crest length more than a hundred kilometers and wavelength of units of kilometers. Wave amplitude of AGWs imprints, evaluated by a 90%-depth of light penetration into the sea at 490 nm z90, the value inverse to the diffuse attenuation coefficient Kd_490, was units of decimeterxs. MODIS 250-m data of remote sensing reflectance, wind components and atmospheric pressure near the sea surface were obtained by processing the top of atmosphere data with the SeaDAS software package. Negative correlations of fluctuations of z90 with fluctuations of wind stress and atmospheric pressure were found on the transects of more than ten kilometers. The impact of wind stress on the origination of AGW imprints was found to be determinant, while the impact of atmospheric pressure was not more than units of percent.
Źródło:: Oceanologia; 2020, 62, 3; 255-266
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Numerical procedures and their practical application in PV module analyses. Part 3, Parameters of atmospheric transparency : determining and correlations
Autorzy:: Rodziewicz, T.
Rajfur, M.
Powiązania:: https://bibliotekanauki.pl/articles/1818226.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Stowarzyszenie Elektryków Polskich
Tematy:: solar radiation spectrum
sky clearness index
diffused component content index
solar energy
photovoltaics
Opis:: The presented article examines aspects of a PV module testing using natural sunlight in outdoor conditions. The article discusses the physical sense of indexes: atmosphere purity, diffused component content, beam clear sky index. Procedures for their determination are given in relation to both instantaneous and daily values. Their close connection with the values of solar irradiance spectral distribution such as Average Photon Energy and Useful Fraction is demonstrated, as well as their usefulness in module testing in outdoor conditions. Their influence on the conversion of modules made from various absorbers and various technologies is demonstrated.
Źródło:: Opto-Electronics Review; 2020, 28, 1; 15--34
1230-3402
Pojawia się w:: Opto-Electronics Review
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Changing Arctic. Firm scientific evidence versus public interest in the issue. Where is the gap?
Autorzy:: Pakszys, P.
Zielinski, T.
Ferrero, L.
Kotynska-Zielinska, I.
Wichorowski, M.
Powiązania:: https://bibliotekanauki.pl/articles/2079054.pdf
Data publikacji:: 2020
Wydawca:: Polska Akademia Nauk. Instytut Oceanologii PAN
Tematy:: Arctic
climate change
biomass burning
atmospheric pollution
radiation
climate warming
scientific research
Opis:: The authors provide hard evidence for a significant environmental impact of long-distance atmospheric pollution advection to the Arctic. Results from literature and of their research show that the atmospheric inflow of pollution to the Arctic has been increasing over the decades. The authors show evidence that biomass burning has a greater potential impact on radiative budget of the region than the well-known spring Arctic Haze phenomenon, which has always been regarded as the most prominent atmospheric pollution manifestation in the Arctic. Warming, which is observed in the Arctic, results in decreasing ice coverage of the region, which in turn, leads to the major changes in the ecosystem, hence affects human well-being. At the same time, the authors present results of two independent studies, dedicated to the recognition of the awareness and the level of interest of people in eight Arctic countries and among young learners in Poland. The results show that not only the level of public interest is low, but it is both decreasing or, at the best, low to societies. This is in strong contradiction to information available and the daily experience of the societies, which inhabit the region. The authors believe, that such contradiction results from a low level of knowledge and interest of the Arctic and the climate change itself. Finally, the authors provide some hints on how to link hard scientific evidence for Arctic environmental changes with proper communication to the general public, and hence to increase the level of interest among citizens.
Źródło:: Oceanologia; 2020, 62, 4PB; 593-602
0078-3234
Pojawia się w:: Oceanologia
Dostawca treści:: Biblioteka Nauki

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Tytuł:: Analysis of impact of atmospheric attenuation and measurement uncertainties on laser hazard distances in navigable airspace for visible cw laser radiation
Autorzy:: Młyńczak, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/27311745.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: aviation safety
laser hazard distances in navigable airspace
laser safety
laser hazard distance
laser illumination
Opis:: This document provides a simplified solution to the problem of calculation of laser hazard distances defined in the Advisory Circular 70-1B by the U.S. Federal Aviation Administration regarding atmospheric attenuation (assuming its constant value) and measurement uncertainties. The calculation approaches and examples presented in this document do not specify the procedure that should be followed in the case of atmospheric attenuation, nor do they take into account the uncertainties associated with the measured parameters. The analysis presented in the article complements to some extent AC 70-1B and can be used by those who need such a simplified solution regarding illumination of landing or taking off aircrafts. The article presents a sample analysis for a typical laser pointer, where the necessary parameters of the laser beam along with the appropriate uncertainties were determined in accordance with the methods accredited by the Polish Centre for Accreditation while the appropriate laser hazard distances were calculated taking into account different atmospheric attenuation coefficients.
Źródło:: Metrology and Measurement Systems; 2023, 30, 2; 259--272
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Dostawca treści:: Biblioteka Nauki

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