Influence of the sunspot cycle on the Northern Hemisphere wintertime circulation from long upper-air data sets

Atmospheric Chemistry and Physics

Volumn 13, Issue 13, 2013, Pages 6275-6288

  Brugnara, Y ^a   Bronnimann S ^a   Luterbacher, J ^b   Rozanov, E ^c,d  

^a UNIVERSITY OF BERN   (Switzerland)

^b JUSTUS LIEBIG UNIVERSITY   (Germany)

^c Physikalisch Meteorologisches Observatorium Davos   (Germany)

^d Land Climate Dynamics Group   (Switzerland)

Author keywords

[No Author keywords available]

Indexed keywords

ATMOSPHERIC CIRCULATION; NORTH ATLANTIC OSCILLATION; NORTHERN HEMISPHERE; SUNSPOT; TROPOSPHERE; WINTER;

EUROPE;

EID: 84880605296     PISSN: 16807316     EISSN: 16807324     Source Type: Journal    
DOI: 10.5194/acp-13-6275-2013     Document Type: Article

References (82)

1. Allan, R. and Ansell, T.: A new globally complete monthly historical gridded mean sea level pressure dataset (HadSLP2): 1850-2004, J. Climate, 19, 5816-5842, doi:10.1175/JCLI3937.1, 2006. (Pubitemid 44970057)
2. Bal, S., Schimanke, S., Spangehl, T., and Cubasch, U.: On the robustness of the solar cycle signal in the Pacific region, Geophys. Res. Lett., 38, L14809, doi:10.1029/2011GL047964, 2011.
3. Barnston, A. G. and Livezey, R. E.: Classification, seasonality and persistence of low-frequency atmospheric circulation patterns, Mon. Weather Rev., 115, 1083-1126, 1987.
4. Barriopedro, D., García-Herrera, R., and Huth, R.: Solar modulation of Northern Hemisphere winter blocking, J. Geophys. Res., 113, D14118, doi:10.1029/2008JD009789, 2008.
5. Bengtsson, L., Hagemann, S., and Hodges, K. I.: Can climate trends be calculated from reanalysis datå, J. Geophys. Res., 109, D11111, doi:10.1029/2004JD004536, 2004. (Pubitemid 39103541)
6. Boberg, F. and Lundstedt, H.: Solar wind variations related to fluctuations of the North Atlantic Oscillation, Geophys. Res. Lett., 29, 1718, doi:10.1029/2002GL014903, 2002.
7. Boberg, F. and Lundstedt, H.: Solar wind electric field modulation of the NAO: A correlation analysis in the lower atmosphere, Geophys. Res. Lett., 30, 1825, doi:10.1029/2003GL017360, 2003.
8. Brönnimann, S., Ewen, T., Griesser, T., and Jenne, R.: Multidecadal signal of solar variability in the upper troposphere during the 20th century, Space Sci. Rev., 125, 305-317, doi:10.1007/s11214-006-9065-2, 2007a. (Pubitemid 46327250)
9. Brönnimann, S., Xoplaki, E., Casty, C., Pauling, A., and Luterbacher, J.: ENSO influence on Europe during the last centuries, Clim. Dynam., 28, 181-197, doi:10.1007/s00382-006-0175-z, 2007b. (Pubitemid 44896860)
10. Brönnimann, S., and Grant., A. N., Compo, G. P., Ewen, T., Griesser, T., and Fischer., A. M., Schraner, M., and Stickler, A.: A multi-data set comparison of the vertical structure of temperature variability and change over the Arctic during the past 100 years, Clim. Dynam., 39, 1577-1598, doi:10.1007/s00382-012-1291-6, 2012a.
11. Brönnimann, S., Griesser, T., and Stickler, A.: A gridded monthly upper-air data set from 1918 to 1957, Clim. Dynam., 38, 475-493, doi:10.1007/s00382-010-0940-x, 2012b.
12. Cattiaux, J., Vautard, R., Cassou, C., Yiou, P., Masson-Delmotte, V., and Codron, F.: Winter 2010 in Europe: A cold extreme in a warming climate, Geophyis. Res. Lett., 37, L20704, doi:10.1029/2010GL044613, 2010.
13. Chiodo, G., Calvo, N., Marsh, D. R., and Garcia-Herrera, R.: The 11 year solar cycle signal in transient simulations from the Whole Atmosphere Community Climate Model, J. Geophys. Res., 117, D06109, doi:10.1029/2011JD016393, 2012.
14. Cnossen, I. and Lu, H.: The vertical connection of the quasi-biennial oscillation-modulated 11 year solar cycle signature in geopotential height and planetary waves during Northern Hemisphere early winter, J. Geophys. Res., 116, D13101, doi:10.1029/2010JD015427, 2011.
15. Compo, G. P., and Whitaker., J. S., Sardeshmukh, P. D., Matsui, N., Allan, R. J., Yin, X., and Gleason., B. E., Vose, R. S., Rutledge, G., Bessemoulin, P., Brönnimann, S., Brunet, M., Crouthamel, R. I., Grant, A. N., Groisman, P. Y., Jones, P. D., Kruk, M. C., Kruger, A. C., Marshall, G. J., Maugeri, M., Mok, H. Y., Nordli, Ø., Ross, T. F., Trigo, R. M., Wang, X. L., Woodruff, S. D., and Worley, S. J.: The Twentieth Century Reanalysis Project, Q. J. Roy. Meteorol. Soc., 137, 1-28, doi:10.1002/qj.776, 2011.
16. Croci-Maspoli, M. and Davies, H. C.: Key dynamical features of the 2005/2006 European winter, Mon. Weather Rev., 137, 664-678, doi:10.1175/ 2008MWR2533.1, 2009.
17. Crowley, T. J., Zielinski, G., Vinther, B., Udisti, R., Kreutz, K., Cole-Dai, J., and Castellano, E.: Volcanism and the little ice age, PAGES News, 16, 22-23, 2008.
18. Eddy, J. A.: The Maunder minimum, Science, 192, 1189-1202, 1976.
19. Enfield, D. B., Mestas-Nuñez, A. M., and Trimble, P. J.: The Atlantic Multidecadal Oscillation and its relation to rainfall and river flows in the continental U.S., Geophys. Res. Lett., 28, 2077-2080, doi:10.1029/2000GL012745, 2001. (Pubitemid 34039420)
20. Fischer, A. M., and Shindell., D. T., Winter, B., Bourqui, M. S., Faluvegi, G., Rozanov, E., Schraner, M., and Brönnimann, S.: Stratospheric winter climate response to ENSO in three chemistry-climate models, Geophys. Res. Lett., 35, L13819, doi:10.1029/2008GL034289, 2008.
21. Frame, T. H. A. and Gray, L. J.: The 11-Yr Solar Cycle in ERA-40 Data: An Update to 2008, J. Climate, 23, 2213-2222, doi:10.1175/2009JCLI3150.1, 2010.
22. Garny, H., and Bodeker., G. E., and Dameris, M.: Trends and variability in stratospheric mixing: 1979-2005, Atmos. Chem. Phys., 7, 5611-5624, doi:10.5194/acp-7-5611-2007, 2007. (Pubitemid 350122323)
23. Gleisner H., Thejill, P., Stendel, M., Kaas, E., and Machenhauer, B.: Solar signals in tropospheric re-analysis data: Comparing NCEP/NCAR and ERA40, J. Atmos. Sol.-Ter. Phy., 67, 785-791, doi:10.1016/j.jastp.2005.02.001, 2005. (Pubitemid 40622056)
24. Graf H. F. and Zanchettin, D.: Central Pacific El Niño, the "subtropical bridge," and Eurasian Climate, J. Geophys. Res., 117, D01102, doi:10.1029/2011JD016493, 2012.
25. 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., and White, W.: Solar influences on climate, Rev. Geophys., 48, RG4001, doi:10.1029/2009RG000282, 2010.
26. Griesser, T., Brönnimann, S., Grant, A., Ewen, T., Stickler, A., and Comeaux, J.: Reconstruction of global monthly upper-level temperature and geopotential height fields back to 1880, J. Climate, 23, 5590-5609, doi:10.1175/2010JCLI3056.1, 2010.
27. Guirguis, K., Gershunov, A., Schwartz, R., and Bennett, S.: Recent warm and cold daily winter temperature extremes in the Northern Hemisphere, Geophys. Res. Lett., 38, L17701, doi:10.1029/2011GL048762, 2011.
28. Haigh, J. D.: The effects of solar variability on the Earth's climate, Phil. Trans. R. Soc. Lond. A., 361, 95-111, doi:10.1098/rsta.2002.1111, 2003. (Pubitemid 37256155)
29. Haigh, J. D. and Roscoe, H. K.: The final warming date of the Antarctic polar vortex and influences on its interannual variability, J. Climate, 22, 5809-5819, doi:10.1175/2009JCLI2865.1, 2009.
30. Haigh, J. D., and Winning., A. R., Toumi, R., and Harder, J. W.: An influence of solar spectral variations on radiative forcing of climate, Nature, 467, 696-699, doi:10.1038/nature09426, 2010.
31. Hansen, J., Ruedy, R., Glascoe, J., and Sato, M.: GISS analysis of surface temperature change, J. Geophys. Res., 104, 30997-31022, 1999.
32. Harder, J. W., and Fontenla., J. M., Pilewskie, P., Richard, E. C., and Woods, T. N.: Trends in solar spectral irradiance variability in the visible and infrared, Geophys. Res. Lett., 36, L07801, doi:10.1029/2008GL036797, 2009.
33. Hebert III, L., Tinsley, B. A., and Zhou, L.: Global electric circuit modulation of winter cyclone vorticity in the northern high latitudes, Adv. Space Res., 50, 806-818, doi:10.1016/j.asr.2012.03.002, 2012.
34. Ineson, S., and Scaife., A. A., Knight, J. R., Manners, J. C., and Dunstone., N. J., Gray, L. J., and Haigh, J. D.: Solar forcing of winter climate variability in the northern hemisphere, Nat. Geosci., 4, 753-757, doi:10.1038/NGEO1282, 2011.
35. Kalnay, E., Kanamitsu, M., Kistler, R., Collins, W., Deaven, D., Gandin, L., Iredell, M., Saha, S., White, G., Woollen, J., Zhu, Y., Chelliah, M., Ebisuzaki, W., Higgins, W., Janowiak, J., Mo, K., Ropelewski, C., Wang, J., Leetmaa, A., Reynolds, R., Jenne, R., and Joseph, D.: The NCEP/NCAR 40-year re-analysis project, Bull. Amer. Meteor. Soc., 77, 437-471, doi:10.1175/1520- 0477(1996)077<0437:TNYRP>2.0.CO;2, 1996.
36. Kazil, J., and Lovejoy., E. R., Barth, M. C., and O'Brien, K.: Aerosol nucleation over oceans and the role of galactic cosmic rays, Atmos. Chem. Phys., 6, 4905-4924, doi:10.5194/acp-6-4905-2006, 2006. (Pubitemid 44663925)
37. Kinter, J. L., and Fennessy., M. J., Krishnamurthy, V., and Marx, L.: An evaluation of the apparent interdecadal shift in the tropical divergent circulation in the NCEP-NCAR Reanalysis, J. Climate, 17, 349-361, doi:10.1175/1520-0442(2004)017<0349:AEOTAI>2.0.CO;2, 2004. (Pubitemid 38261597)
38. Kistler, R., Kalnay, E., Collins, W., Saha, S., White, G., Woollen, J., Chelliah, M., Ebisuzaki, W., Kanamitsu, M., Kousky, V., van den Dool, H., Jenne, R., and Fiorino, M.: The NCEP-NCAR 50-Year Reanalysis: Monthly Means CD-ROM and Documentation, B. Am. Meteor. Soc., 82, 247-267, doi:10.1175/1520-0477(2001) 082<0247:TNNYRM>2.3.CO;2, 2001. (Pubitemid 33622659)
39. Kodera, K.: Solar influence on the spatial structure of the NAO during the winter 1900-1999, Geophys. Res. Lett., 30, 1175, doi:10.1029/2002GL016584, 2003.
40. Küttel, M., Luterbacher, J., and Wanner, H.: Multidecadal changes in winter circulation-climate relationship in Europe: frequency variations, within-type modifications, and long-term trends, Clim. Dyn., 36, 957-972, doi:10.1007/s00382-009-0737-y, 2011.
41. Labitzke, K., Kunze, M., and Brönnimann, S.: Sunspots, the QBO and the stratosphere in the north polar region - 20 years later, Meteorol. Z., 15, 355-363, doi:10.1127/0941-2948/2006/0136, 2006. (Pubitemid 44027675)
42. Lean, J. L. and Rind, D. H.: How natural and anthropogenic influences alter global and regional surface temperatures: 1889 to 2006, Geophys. Res. Lett., 35, L1870, doi:10.1029/2008GL034864, 2008.
43. Livezey, R. E. and Chen, W. Y.: Statistical field significance and its determination by Monte Carlo techniques, Mon. Weather Rev., 111, 46-59, 1983.
44. Lockwood, M.: Solar influence on global and regional climates, Surv. Geophys., 33, 503-534, doi:10.1007/s10712-012-9181-3, 2012.
45. Lockwood, M., and Harrison., R. G., Woollings, T., and Solanki, S.: Are cold winters in Europe associated with low solar activity?, Environ. Res. Lett., 5, 024001, doi:10.1088/1748-9326/5/2/024001, 2010.
46. Luterbacher, J., Schmutz, C., Gyalistras, D., Xoplaki, E., and Wanner, H.: Reconstruction of monthly NAO and EU indices back to AD 1675, Geophys. Res. Lett., 26, 2745-2748, doi:10.1029/1999GL900576, 1999. (Pubitemid 30031589)
47. Luterbacher, J., Xoplaki, E., Dietrich, D., Jones, P. D., and Davies., T. D., Portis, D., Gonzalez-Rouco, J. F., von Storch, H., Gyalistras, D., Casty, C., and Wanner, H.: Extending North Atlantic oscillation reconstructions back to 1500, Atmos. Sci. Lett., 2, 114-124, doi:10.1006/asle.2002.0047, 2001. (Pubitemid 33703009)
48. Luterbacher, J., Xoplaki, E., Dietrich, D., Rickli, R., Jacobeit, J., Beck, C., Gyalistras, D., Schmutz, C., and Wanner, H.: Reconstruction of sea level pressure fields over the eastern North Atlantic and Europe back to 1500, Clim. Dynam., 18, 545-561, doi:10.1007/S00382-001-0196-6, 2002.
49. Martin-Puertas, C., Matthes, K., Brauer, A., Muscheler, R., Hansen, F., Petrick, C., Aldahan, A., Possnert, G., and van Geel, B.: Regional atmospheric circulation shifts induced by a grand solar minimum, Nature Geosci., 5, 397-401, doi:10.1038/ngeo1460, 2012.
50. Meehl, G. A., and Arblaster., J. M., Branstator, G., and van Loon, H.: A coupled air-sea response mechanism to solar forcing in the Pacific region, J. Clim., 21, 2883-2897, doi:10.1175/2007JCLI1776.1, 2008.
51. Meehl, G. A., and Arblaster., J. M., Matthes, K., Sassi, F., and van Loon, H.: Amplifying the Pacific climate system response to a small 11-year solar cycle forcing, Science, 325, 1114-1118, doi:10.1126/science.1172872, 2009.
52. Moron, V. and Plaut, G.: The impact of El Niño-southern oscillation upon weather regimes over Europe and the North Atlantic during boreal winter. Int. J. Climatol., 23, 363-379, doi:10.1002/joc.890, 2003. (Pubitemid 36463763)
53. Peixoto, J. P. and Oort, A. H.: Observed mean state of the atmosphere, in: Physics of Climate, Springer-Verlag, New York, USA, 1992.
54. Rayner, N. A., and Parker., D. E., Horton, E. B., Folland, C. K., and Alexander., L. V., Rowell, D. P., Kent, E. C., and Kaplan, A.: Global analyses of sea surface temperature, sea ice, and night marine air temperature since the late nineteenth century, J. Geophys. Res., 108, 4407, doi:10.1029/2002JD002670, 2003.
55. Rayner, N. A., Brohan, P., Parker, D. E., and Folland., C. K., Kennedy, J. J., Vanicek, M., Ansell, T. J., and Tett, S. F. B.: Improved analyses of changes and uncertainties in sea surface temperature measured in situ since the mid-nineteenth century: The HadSST2 dataset, J. Climate, 19, 446-469, doi:10.1175/JCLI3637.1, 2006.
56. Rex, D. F.: Blocking action in the middle troposphere and its effect upon regional climate. Part II: The climatology of blocking action, Tellus, 2, 275-301, doi:10.1111/j.2153-3490.1950.tb00339.x, 1950.
57. Rodwell, M. J.: On the predictability of North Atlantic climate, in: The North Atlantic Oscillation: climatic significance and environmental impact, Geophys. Monogr. Ser., 134, edited by: Hurrell, J. W., Kushnir, Y., Ottersen, G., and Visbeck, M., Washington, DC, 173-192, doi:10.1029/134GM08, 2003.
58. Roy, I. and Haigh, J. D.: Solar cycle signals in sea level pressure and sea surface temperature, Atmos. Chem. Phys., 10, 3147-3153, doi:10.5194/acp-10- 3147-2010, 2010.
59. Roy, I. and Haigh, J. D.: The influence of solar variability and the quasi-biennial oscillation on lower atmospheric temperatures and sea level pressure, Atmos. Chem. Phys., 11, 11679-11687, doi:10.5194/acp-11-11679-2011, 2011.
60. Russell, C. T., and Luhmann., J. G., and Jian, L. K.: How unprecedented a solar minimum?, Rev. Geophys., 48, RG2004, doi:10.1029/2009RG000316, 2010.
61. Schmutz, C. and Wanner, H.: Low frequency variability of atmospheric circulation over Europe between 1785 and 1994, Erdkunde, 52, 81-94, 1998. (Pubitemid 28497288)
62. Schrijver, C. J., and Livingston., W. C., Woods, T. N., and Mewaldt, R.A.: The minimal solar activity in 2008-2009 and its implications for long-term climate modelling, Geophys. Res. Lett., 38, L06701, doi:10.1029/2011GL046658, 2011.
63. Shapiro, A. I., Schmutz, W., Rozanov, E., Schoell, M., Haberreiter, M., Shapiro, A. V., and Nyeki, S.: 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, 2011.
64. Shindell, D. T., Rind, D., Balachandran, N. K., Lean, J., and Lonergan, P.: Solar cycle variability, ozone, and climate, Science, 284, 305-308, doi:10.1126/science.284.5412.305, 1999. (Pubitemid 129523446)
65. Shindell, D. T., and Schmidt., G. A., Mann, M. E., Rind, D., and Waple, A.: Solar forcing of regional climate change during the Maunder Minimum, Science, 294, 2149-2152, doi:10.1126/science.1064363, 2001. (Pubitemid 33150668)
66. Sirocko, F., Brunck, H., and Pfahl, S.: Solar influence on winter severity in central Europe, Geophys. Res. Lett., 39, L16704, doi:10.1029/2012GL052412, 2012.
67. Stickler, A., and Grant., A. N., Ewen, T., Ross, T. F., and Vose., R. S., Comeaux, J., Bessemoulin, P., Jylhä, K., Adam, W. K., Jeannet, P., Nagurny, A., Sterin, A. M., Allan, R., Compo, G. P., Griesser, T., and Brönnimann, S.: The Comprehensive Historical Upper-Air Network, B. Am. Meteorol. Soc., 91, 741-751, doi:10.1175/2009BAMS2852.1, 2010.
68. Thejll, P., Christiansen, B., and Gleisner, H.: On correlations between the North Atlantic Oscillation, geopotential heights, and geomagnetic activity, Geophys. Res. Lett., 30, 1347, doi:10.1029/2002GL016598, 2003.
69. Thompson, D. W. J., Kennedy, J. J, Wallace, J. M., and Jones, P. D.: A large discontinuity in the mid-twentieth century in observed global-mean surface temperature, Nature 453, 646-649, doi:10.1038/nature06982, 2008. (Pubitemid 351769305)
70. Tinsley, B. A.: Influence of solar wind on the global electric circuit, and inferred effects on cloud microphysics, temperature, and dynamics in the troposphere, Space Sci. Rev., 94, 231-258, doi:10.1023/A:1026775408875, 2000. (Pubitemid 32006028)
71. Tinsley, B. A.: A working hypothesis for connections between electrically-induced changes in cloud microphysics and storm vorticity, with possible effects on circulation, Adv. Space Res., 50, 791-805, doi:10.1016/j.asr.2012.04.008, 2012.
72. Tinsley, B. A. and Yu, F.: Atmospheric ionization and clouds as links between solar activity and climate, in: Solar variability and its effects on climate, Geophysical Monograph, Vol. 141, AGU Press, Washington, DC, 321-339, 2004.
73. Tinsley, B. A, Brown G. M., and Scherrer, P. H.: Solar variability influences on weather and climate: possible connections through cosmic ray-fluxes and storm intensification, J. Geophys. Res., 94, 14783-14792, doi:10.1029/JD094iD12p14783, 1989.
74. Tung, K. K. and Camp, C. D.: Solar cycle warming at the Earth's surface in NCEP and ERA-40 data: A linear discriminant analysis, J. Geophys. Res., 113, D05114, doi:10.1029/2007JD009164, 2008.
75. Uppala, S. M., Kållberg, P. W., Simmons, A. J., Andrae, U., da Costa Bechtold, V., Fiorino, M., and Gibson., J. K., Haseler, J., Hernandez, A., Kelly, G. A., Li, X., Onogi, K., Saarinen, S., Sokka, N., Allan, R. P., Andersson, E., Arpe, K., Balmaseda, M. A., Beljaars, A. C. M., van de Berg, L., Bidlot, J., Bormann, N., Caires, S., Chevallier, F., Dethof, A., Dragosavac, M., Fisher, M., Fuentes, M., Hagemann, S., Hólm, E., Hoskins, B. J., Isaksen, L., Janssen, P. A. E. M., Jenne, R., McNally, A. P., Mahfouf, J.-F., Morcrette, J.-J., Rayner, N. A., Saunders, R. W., Simon, P., Sterl, A., Trenberth, K. E., Untch, A., Vasiljevic, D., Viterbo, P., and Woollen, J.: The ERA-40 re-analysis, Q. J. Roy. Meteorol. Soc., 131, 2961-3012, doi:10.1256/qj.04.176, 2005. (Pubitemid 43186171)
76. van Oldenborgh, G. J., de Laat, A. T. J., Luterbacher, J., Ingram, W. J., and Osborn, T. J.: Claim of solar influence is on thin ice: are 11-year cycle solar minima associated with severe winters in Europe?, Environ. Res. Lett., 8, 024014, doi:10.1088/1748-9326/8/2/024014, 2013.
77. van Loon, H., Meehl, G. A., and Shea, D. J.: Coupled air-sea response to solar forcing in the Pacific region during northern winter, J. Geophys. Res., 112, D02108, doi:10.1029/2006JD007378, 2007. (Pubitemid 47260875)
78. Wibig, J.: Precipitation in Europe in relation to circulation patterns at the 500 hPa level, Int. J. Climatol., 19, 253-269, doi:10.1002/(SICI)1097- 0088(19990315)19:3<253::AID-JOC366>3.0.CO;2-0, 1999. (Pubitemid 29253351)
79. Woollings, T., Lockwood, M., Masato, G., Bell, C., and Gray, L.: Enhanced signature of solar variability in Eurasian winter climate, Geophys. Res. Lett., 37, L20805, doi:10.1029/2010GL044601, 2010.
80. Xoplaki, E., Gonzalez-Rouco, J. F., Luterbacher, J., and Wanner, H.: Wet season Mediterranean precipitation variability: influence of large-scale dynamics and trends, Clim. Dyn., 23, 63-78, doi:10.1007/s00382-004-0422-0, 2004. (Pubitemid 39259986)
81. Zanchettin, D., Bothe, O., Graf, H-F., Lorenz, S. J., Luterbacher, J., Timmreck, C., and Jungclaus, J. H.: Background conditions influence the decadal climate response to strong volcanic eruptions, J. Geophys. Res., 118, doi:10.1002/jgrd.50229, 2013a.
82. Zanchettin, D., Timmreck, C., Bothe, O., Lorenz, S. J., Hegerl, G., Graf, H-F., Luterbacher, J., and Jungclaus, J. H.: Delayed winter warming: a robust decadal response to strong tropical volcanic eruptions?, Geophys. Res. Lett., 40, 204-209, doi:10.1029/2012GL054403, 2013b.