Detection of Solar Rotational Variability in the Large Yield RAdiometer (LYRA) 190 – 222 nm Spectral Band
Tóm tắt
We analyze the variability of the spectral solar irradiance during the period from 7 January 2010 until 20 January 2010 as measured by the Herzberg channel (190 – 222 nm) of the Large Yield RAdiometer (LYRA) onboard PROBA2. In this period of time, observations by the LYRA nominal unit experienced degradation and the signal produced by the Herzberg channel frequently jumped from one level to another. Both factors significantly complicate the analysis. We present the algorithm that allowed us to extract the solar variability from the LYRA data and compare the results with SORCE/SOLSTICE measurements and with modeling based on the Code for the Solar Irradiance (COSI).
Tài liệu tham khảo
Benmoussa, A., Dammasch, I.E., Hochedez, J.-F., Schühle, U., Koller, S., Stockman, Y., Scholze, F., Richter, M., Kroth, U., Laubis, C., Dominique, M., Kretzschmar, M., Mekaoui, S., Gissot, S., Theissen, A., Giordanengo, B., Bolsee, D., Hermans, C., Gillotay, D., Defise, J.-M., Schmutz, W.: 2009, Pre-flight calibration of LYRA, the solar VUV radiometer on board PROBA2. Astron. Astrophys. 508, 1085 – 1094. doi: 10.1051/0004-6361/200913089 .
Brasseur, G., de Rudder, A., Keating, G.M., Pitts, M.C.: 1987, Response of middle atmosphere to short-term solar ultraviolet variations. II. Theory. J. Geophys. Res. 92, 903 – 914. doi: 10.1029/JD092iD01p00903 .
Domingo, V., Ermolli, I., Fox, P., Fröhlich, C., Haberreiter, M., Krivova, N., Kopp, G., Schmutz, W., Solanki, S.K., Spruit, H.C., Unruh, Y., Vögler, A.: 2009, Solar surface magnetism and irradiance on time scales from days to the 11-year cycle. Space Sci. Rev. 145, 337 – 380. doi: 10.1007/s11214-009-9562-1 .
Dominique, M., Berghmans, D., Cessateur, G., Cabanas, C., Dammasch, I., De Groof, A., Kretzschmar, M., Nicula, B., Tetard, C., Vanhellemont, F., Zender, J.: 2012a, Solar occultations observed by LYRA from PROBA2. Solar Phys., in preparation.
Dominique, M., Hochedez, J.-F., Schmutz, W., Dammasch, I., BenMoussa, A., Shapiro, A.I., Kretzschmar, M.: 2012b, The LYRA instrument on-board PROBA2: description and in-flight performances. Solar Phys., in preparation.
Fligge, M., Solanki, S.K., Unruh, Y.C.: 2000, Modelling irradiance variations from the surface distribution of the solar magnetic field. Astron. Astrophys. 353, 380 – 388.
Fontenla, J., White, O.R., Fox, P.A., Avrett, E.H., Kurucz, R.L.: 1999, Calculation of solar irradiances. I. Synthesis of the solar spectrum. Astrophys. J. 518, 480 – 499. doi: 10.1086/307258 .
Fontenla, J.M., Curdt, W., Haberreiter, M., Harder, J., Tian, H.: 2009, Semiempirical models of the solar atmosphere. III. Set of non-LTE models for far-ultraviolet/extreme-ultraviolet irradiance computation. Astrophys. J. 707, 482 – 502. doi: 10.1088/0004-637X/707/1/482 .
Foukal, P., Lean, J.: 1988, Magnetic modulation of solar luminosity by photospheric activity. Astrophys. J. 328, 347 – 357. doi: 10.1086/166297 .
Fröhlich, C.: 2005, Solar irradiance variability since 1978. Mem. Soc. Astron. Ital. 76, 731.
Gray, L.J., Beer, J., Geller, M., Haigh, J.D., Lockwood, M., Matthes, K., Cubasch, U., Fleitmann, D., Harrison, G., Hood, L., Luterbacher, J., Meehl, G.A., Shindell, D., van Geel, B., White, W.: 2010, Solar influences on climate. Rev. Geophys. 48, RG4001. doi: 10.1029/2009RG000282 .
Haigh, J.D., Winning, A.R., Toumi, R., Harder, J.W.: 2010, An influence of solar spectral variations on radiative forcing of climate. Nature 467, 696 – 699. doi: 10.1038/nature09426 .
Harder, J.W., Fontenla, J.M., Pilewskie, P., Richard, E.C., Woods, T.N.: 2009, Trends in solar spectral irradiance variability in the visible and infrared. Geophys. Res. Lett. 36, L07801. doi: 10.1029/2008GL036797 .
Hochedez, J.-F., Schmutz, W., Stockman, Y., Schühle, U., Benmoussa, A., Koller, S., Haenen, K., Berghmans, D., Defise, J.-M., Halain, J.-P., Theissen, A., Delouille, V., Slemzin, V., Gillotay, D., Fussen, D., Dominique, M., Vanhellemont, F., McMullin, D., Kretzschmar, M., Mitrofanov, A., Nicula, B., Wauters, L., Roth, H., Rozanov, E., Rüedi, I., Wehrli, C., Soltani, A., Amano, H., van der Linden, R., Zhukov, A., Clette, F., Koizumi, S., Mortet, V., Remes, Z., Petersen, R., Nesládek, M., D’Olieslaeger, M., Roggen, J., Rochus, P.: 2006, LYRA, a solar UV radiometer on Proba2. Adv. Space Res. 37, 303 – 312. doi: 10.1016/j.asr.2005.10.041 .
Krivova, N.A., Solanki, S.K.: 2008, Models of solar irradiance variations: current status. J. Astrophys. Astron. 29, 151 – 158. doi: 10.1007/s12036-008-0018-x .
McClintock, W.E., Rottman, G.J., Woods, T.N.: 2005, Solar-stellar irradiance comparison experiment II (Solstice II): instrument concept and design. Solar Phys. 230, 225 – 258. doi: 10.1007/s11207-005-7432-x .
Rast, M.P., Ortiz, A., Meisner, R.W.: 2008, Latitudinal variation of the solar photospheric intensity. Astrophys. J. 673, 1209 – 1217. doi: 10.1086/524655 .
Rozanov, E., Egorova, T., Schmutz, W., Peter, T.: 2006, Simulation of the stratospheric ozone and temperature response to the solar irradiance variability during sun rotation cycle. J. Atmos. Solar-Terr. Phys. 68, 2203 – 2213. doi: 10.1016/j.jastp.2006.09.004 .
Schmutz, W., Fehlmann, A., Hülsen, G., Meindl, P., Winkler, R., Thuillier, G., Blattner, P., Buisson, F., Egorova, T., Finsterle, W., Fox, N., Gröbner, J., Hochedez, J.-F., Koller, S., Meftah, M., Meisonnier, M., Nyeki, S., Pfiffner, D., Roth, H., Rozanov, E., Spescha, M., Wehrli, C., Werner, L., Wyss, J.U.: 2009, The PREMOS/PICARD instrument calibration. Metrologia 46, 202. doi: 10.1088/0026-1394/46/4/S13 .
Shapiro, A.I., Schmutz, W., Schoell, M., Haberreiter, M., Rozanov, E.: 2010, NLTE solar irradiance modeling with the COSI code. Astron. Astrophys. 517, A48. doi: 10.1051/0004-6361/200913987 .
Shapiro, A.I., Schmutz, W., Rozanov, E., Schoell, M., Haberreiter, M., Shapiro, A.V., Nyeki, S.: 2011a, A new approach to the long-term reconstruction of the solar irradiance leads to large historical solar forcing. Astron. Astrophys. 529, A67. doi: 10.1051/0004-6361/201016173 .
Shapiro, A.V., Rozanov, E., Egorova, T., Shapiro, A.I., Peter, T., Schmutz, W.: 2011b, Sensitivity of the Earth’s middle atmosphere to short-term solar variability and its dependence on the choice of solar irradiance data set. J. Atmos. Solar-Terr. Phys. 73, 348 – 355. doi: 10.1016/j.jastp.2010.02.011 .
Shapiro, A.I., Schmutz, W., Dominique, M., Shapiro, A.V.: 2011c, Eclipses observed by LYRA – a sensitive tool to test the models for the solar irradiance. Solar Phys., accepted.
Thuillier, G., Claudel, J., Djafer, D., Haberreiter, M., Mein, N., Melo, S.M.L., Schmutz, W., Shapiro, A., Short, C.I., Sofia, S.: 2011, The shape of the solar limb: models and observations. Solar Phys. 268, 125 – 149. doi: 10.1007/s11207-010-9664-7 .
Unruh, Y.C., Krivova, N.A., Solanki, S.K., Harder, J.W., Kopp, G.: 2008, Spectral irradiance variations: comparison between observations and the SATIRE model on solar rotation time scales. Astron. Astrophys. 486, 311 – 323. doi: 10.1051/0004-6361:20078421 .
Van Doorsselaere, T., De Groof, A., Zender, J., Berghmans, D., Goossens, M.: 2012, LYRA observations of two oscillation modes in a single flare. Astrophys. J. 740, 90. doi: 10.1088/0004-637X/740/2/90 .