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    Wyświetlanie 1-7 z 7
    Tytuł:
    Latitudinal variability of the radiation microclimate in artificial forest gaps in Poland – the modelling perspective
    Autorzy:
    Brach, Michał
    Bolibok, Leszek
    Drozdowski, Stanisław
    Szeligowski, Henryk
    Wydawca:
    Instytut Badawczy Leśnictwa (Forest Research Institute), Sekocin Stary, Poland
    Opis:
    Przemysław Szmit
    The aim of the study was to characterize latitudinal changes in the radiative microclimate of small forest openings (artificial gaps) under Polish conditions. The global, direct and diffuse radiation on the forest floor in gaps was modelled using the Solar Radiation tool in ArcGiS 10.2 Esri. The gaps were modelled as holes of elliptical shape (60 m x 40 m diameters) in flat terrain and with a depth of 20 to 30 meters to mimic the height of a surrounding tree stand. The range of global radiation diversity on an open and flat surface predicted by our model was comparable with findings of empirical studies. Theoretically, the investigated gaps in the northern-most part of Poland receive only 82% of global solar radiation, 74% direct and 90% of diffuse radiation compared to gaps in the most southern part of the country. The comparison with empirical data indicates that local values of the transmittance parameter of the atmosphere may have a large influence on the actual values of solar radiation and may partially mask the latitudinal impact. Nevertheless, the model constitutes a valuable tool for characterising solar radiation diversity in a gap and supports silvicultural decision-making.
    Dostawca treści:
    Repozytorium Centrum Otwartej Nauki
    Artykuł
    Tytuł:
    H.E.S.S. observations of the flaring gravitationally lensed galaxy PKS 1830-211
    Autorzy:
    Schüssler, F.
    Mariaud, C.
    Holch, T. L.
    Niemiec, J.
    Jouvin, L.
    Holler, M.
    Fegan, S.
    Simoni, R.
    Fontaine, G.
    Meintjes, P. J.
    Jankowsky, D.
    Sinha, A.
    Odaka, H.
    Ruiz-Velasco, E.
    Santangelo, A.
    Gottschall, D.
    Dyks, J.
    Saito, S.
    Lenain, J.-P.
    Aharonian, F.
    Becker Tjus, J.
    Chakraborty, N.
    Lau, J.
    Iwasaki, H.
    Schwemmer, S.
    Katz, U.
    Giavitto, G.
    Romoli, C.
    Heinzelmann, G.
    Lorentz, M.
    Caroff, S.
    Bryan, M.
    Ohm, S.
    Henri, G.
    Glawion, D.
    Marcowith, A.
    Niederwanger, F.
    Mohamed, M.
    Sanchez, D. A.
    Wierzcholska, Alicja
    Oya, I.
    Sasaki, M.
    Perennes, C.
    Takahashi, T.
    Spir-Jacob, M.
    Lohse, T.
    López-Coto, R.
    Steppa, C.
    Ziegler, A.
    van der Walt, D. J.
    Brun, P.
    Ait Benkhali, F.
    Punch, M.
    Büchele, M.
    Vink, J.
    Reimer, O.
    Zorn, J.
    Boisson, C.
    Casanova, S.
    Eschbach, S.
    Arrieta, M.
    Arakawa, M.
    Colafrancesco, S.
    Huber, D.
    Lefaucheur, J.
    Katarzyński, K.
    Mohrmann, L.
    Senniappan, M.
    Venter, C.
    Kluźniak, W.
    Bernlöhr, K.
    Stegmann, C.
    Bulik, T.
    Böttcher, M.
    Brun, F.
    Tluczykont, M.
    Carosi, A.
    Cerruti, M.
    Veh, J.
    Marandon, V.
    Haupt, M.
    van Eldik, C.
    Tuffs, R.
    Stawarz, Łukasz
    Hahn, J.
    Hinton, J. A.
    Poireau, V.
    Martí-Devesa, G.
    Vincent, P.
    Bylund, T.
    Rudak, B.
    Tavernet, J.-P.
    Yoneda, H.
    Bolmont, J.
    Reimer, A.
    Prokoph, H.
    Fiasson, A.
    Seyffert, A. S.
    Lypova, I.
    Trichard, C.
    Tiziani, D.
    Angüner, E. O.
    Schlickeiser, R.
    Renaud, M.
    Uchiyama, Y.
    Tavernier, T.
    Katsuragawa, M.
    Khangulyan, D.
    de Naurois, M.
    Moulin, E.
    Piel, Q.
    Komin, Nu
    Kosack, K.
    Yang, R.
    Żywucka-Hejzner, Natalia
    Wagner, S. J.
    Chand, T.
    Gabici, S.
    Zaborov, D.
    Funk, S.
    Taylor, A. M.
    Vasileiadis, G.
    Blackwell, R.
    Grondin, M.-H.
    Chen, A.
    Wagner, R. M.
    Shafi, N.
    Capasso, M.
    Tsirou, M.
    Voisin, F.
    Dmytriiev, A.
    Chandra, S.
    Davids, I. D.
    Ernenwein, J.-P.
    Hoischen, C.
    Ostrowski, Michał
    Ndiyavala, H.
    Noel, Angel
    Doroshenko, V.
    Bonnefoy, S.
    Zacharias, M.
    Djannati-Ataï, A.
    Khélifi, B.
    Hermann, G.
    Jamrozy, Marek
    Schwanke, U.
    Moderski, R.
    Moore, C.
    O'Brien, P.
    Becherini, Y.
    Jacholkowska, A.
    Quirrenbach, A.
    Shiningayamwe, K.
    Abdalla, H.
    deWilt, P.
    Specovius, A.
    Nakashima, S.
    Bordas, P.
    Maurin, G.
    Lamanna, G.
    Arcaro, C.
    White, R.
    van Soelen, B.
    Rowell, G.
    Schulz, A.
    Barnard, M.
    Jung-Richardt, I.
    King, J.
    Lemoine-Goumard, M.
    Backes, M.
    Rinchiuso, L.
    Prokhorov, D. A.
    Kastendieck, M. A.
    Horns, D.
    Malyshev, D.
    van Rensburg, C.
    Peyaud, B.
    Wadiasingh, Z.
    Marx, R.
    Glicenstein, J. F.
    Rieger, F.
    Gallant, Y. A.
    Shilon, I.
    Condon, B.
    Berge, D.
    Lemière, A.
    Bregeon, J.
    Dirson, L.
    Terrier, R.
    Mitchell, A. M. W.
    Gaté, F.
    Drury, L. O'C.
    Parsons, R. D.
    Hofmann, W.
    Pühlhofer, G.
    Murach, T.
    Tsuji, N.
    Egberts, K.
    Seglar-Arroyo, M.
    Sol, H.
    Emery, G.
    Leser, E.
    Chaves, R. C. G.
    Petrucci, P.-O.
    Raab, S.
    Panter, M.
    Armand, C.
    Jankowsky, F.
    Völk, H. J.
    Kraus, M.
    Zanin, R.
    Devin, J.
    Füßling, M.
    Pita, S.
    Sahakian, V.
    Zdziarski, A. A.
    Oakes, L.
    Vuillaume, T.
    Zech, A.
    Deil, C.
    Steenkamp, R.
    Klepser, S.
    Schutte, H.
    Donath, A.
    Rauth, R.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
    Tytuł:
    Impact of Atmospheric Optical Properties on Net Ecosystem Productivity of Peatland in Poland
    Autorzy:
    Chojnicki, Bogdan H.
    Schüttemeyer, Dirk
    Stachlewska, Iwona S.
    Kleniewska, Małgorzata
    Harenda, Kamila M.
    MacArthur, Alasdair
    Markowicz, Krzysztof M.
    Samson, Mateusz
    Juszczak, Radosław
    Wydawca:
    MDPI
    Cytata wydawnicza:
    Harenda KM, Samson M, Juszczak R, Markowicz KM, Stachlewska IS, Kleniewska M, MacArthur A, Schüttemeyer D, Chojnicki BH. Impact of Atmospheric Optical Properties on Net Ecosystem Productivity of Peatland in Poland. Remote Sensing. 2021; 13(11):2124. https://doi.org/10.3390/rs13112124
    Opis:
    Peatlands play an important role in the global carbon cycle due to the high carbon storage in the substrate. Ecosystem production depends, for example, on the solar energy amount that reaches the vegetation, however the diffuse component of this flux can substantially increase ecosystem net productivity. This phenomenon is observed in different ecosystems, but the study of the atmosphere optical properties on peatland production is lacking. In this paper, the presented methodology allowed us to disentangle the diffuse radiation impact on the net ecosystem production (NEP) of Rzecin peatland, Poland. It allowed us to assess the impact of the atmospheric scattering process determined by the aerosol presence in the air mass. An application of atmospheric radiation transfer (ART) and ecosystem production (EP) models showed that the increase of aerosol optical thickness from 0.09 to 0.17 caused NEP to rise by 3.4–5.7%. An increase of the diffusion index (DI) by 0.1 resulted in an NEP increase of 6.1–42.3%, while a DI decrease of 0.1 determined an NEP reduction of −49.0 to −10.5%. These results show that low peatland vegetation responds to changes in light scattering. This phenomenon should be taken into account when calculating the global CO2 uptake estimation of such ecosystems.
    Dostawca treści:
    Repozytorium Centrum Otwartej Nauki
    Artykuł
    Tytuł:
    Probing active galactic nuclei–interstellar medium feedback through extended x-ray emission in ESO 137-G034
    Autorzy:
    Rosario, D.
    Król, Dominika Ł.
    Elvis, M.
    Davies, R.
    Hill, D.
    Trindade Falcão, A.
    Middei, R.
    Fabbiano, G.
    Shimizu, T.
    Opis:
    We present a detailed analysis of the X-ray emission of the Compton-thick (CT) active galactic nuclei (AGN) ESO 137-G034 based on deep (∼230 ks) Chandra observations. As in other CT AGNs, the morphology of the emission is elongated, approximately following the [O III] ionization bicone. With spatially resolved spectral modeling, we show that the extended emission within the bicone regions is most readily explained as from a mixture of photoionized gas and shock-heated plasma, reflecting the combined effects of radiative and kinematic AGN feedback. By comparing the morphology of the X-ray emission in narrow spectral bands and that of the 3 cm radio jet, we find suggestive evidence of thermal, possibly shocked emission associated with the SE termination of the radio jet. This interpretation is also supported by the lack of [O III] relative to the 0.3−3.0 keV flux in the inner 3″ (∼600 pc) of the SE cone, which would be consistent with an additional thermal X-ray component on top of the photoionized emission of an outflowing wind. A similar effect is only seen within the inner 1″ (200 pc) of the NW cone. In the radial profile of the [O III]/X-ray flux ratio and the X-ray hardness ratio within the inner ∼3″ (∼600 pc) of the SE cone, we see an asymmetry, with no counterpart in the NW cone. We detect soft extended X-ray emission in the cross cones, which may originate from the interaction of an embedded radio jet with a clumpy interstellar medium. These results highlight the importance of both radiative and mechanical feedback in shaping the circumnuclear environment of ESO 137-G034.
    Dostawca treści:
    Repozytorium Uniwersytetu Jagiellońskiego
    Artykuł
      Wyświetlanie 1-7 z 7

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