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1990–2016 surface solar radiation variability and trend over the Piedmont region (northwest Italy)

  • Veronica Manara
  • Manuela Bassi
  • Michele Brunetti
  • Barbara Cagnazzi
  • Maurizio Maugeri
Original Paper

Abstract

A new surface solar radiation database of 74 daily series is set up for the Piedmont region (northwest Italy) for the 1990–2016 period. All the series are subjected to a detailed quality control, homogenization and gap-filling procedure and are transformed into relative annual/seasonal anomaly series. Finally, a gridded version (0.5°×0.5°) of the database is generated. The resulting series show an increasing tendency of about + 2.5% per decade at annual scale, with strongest trend in autumn (+ 4% per decade). The only exception is winter, showing a negative but not significant trend. Considering the plain and mountain mean series, the trends are more intense for low than for high elevations with a negative vertical gradient of about − 0.03% per decade per 100 m at annual scale and values up to − 0.07% per decade per 100 m in spring. Focusing on clear days only (selected by CM SAF ClOud fractional cover dataset from METeosat first and second generation—Edition 1 satellite data over the 1991–2015 period), trend significance strongly increases and both low and high elevation records exhibit a positive trend in all seasons. However, the trends result slightly lower than for all-sky days (with the only exception of winter). The differences observed under clear-sky conditions between low and high elevations are more pronounced in winter, where the trend shows a negative vertical gradient of about − 0.1% per decade every 100 m. Overall, this paper shows how a high station density allows performing a more detailed quality control thanks to the higher performances in detecting the inhomogeneities with higher data availability and capturing regional peculiarities otherwise impossible to observe.

Notes

Acknowledgements

This work was supported by the Special Project HR-CIMA within the frame of the Project of National Interest NextData.

References

  1. Aguilar E, Auer I, Brunet M, et al (2003) Guidelines on climate metadata and homogenization. World Clim Program Data Monit WCDMP-No 53, WMO-TD No 1186 1186:50Google Scholar
  2. Albrecht BA (1989) Aerosols, cloud microphysics, and fractional cloudiness. Science (80- ) 245:1227–1230.  https://doi.org/10.1126/science.245.4923.1227 CrossRefGoogle Scholar
  3. Auer I, Böhm R, Jurković A, Orlik A, Potzmann R, Schöner W, Ungersböck M, Brunetti M, Nanni T, Maugeri M, Briffa K, Jones P, Efthymiadis D, Mestre O, Moisselin JM, Begert M, Brazdil R, Bochnicek O, Cegnar T, Gajić-Čapka M, Zaninović K, Majstorović Ž, Szalai S, Szentimrey T, Mercalli L (2005) A new instrumental precipitation dataset for the greater alpine region for the period 1800-2002. Int J Climatol 25:139–166.  https://doi.org/10.1002/joc.1135 CrossRefGoogle Scholar
  4. Baltensperger U, Gäggeler HW, Jost DT, Emmenegger M, Nägeli W (1991) Continuous background aerosol monitoring with the epiphaniometer. Atmos Environ Part A, Gen Top 25:629–634.  https://doi.org/10.1016/0960-1686(91)90060-K CrossRefGoogle Scholar
  5. Boers R, Brandsma T, Pier Siebesma A (2017) Impact of aerosols and clouds on decadal trends in all-sky solar radiation over the Netherlands (1966-2015). Atmos Chem Phys 17:8081–8100.  https://doi.org/10.5194/acp-17-8081-2017 CrossRefGoogle Scholar
  6. Bressi M, Cavalli F, Belis CA, Putaud JP, Fröhlich R, Martins dos Santos S, Petralia E, Prévôt ASH, Berico M, Malaguti A, Canonaco F (2016) Variations in the chemical composition of the submicron aerosol and in the sources of the organic fraction at a regional background site of the Po Valley (Italy). Atmos Chem Phys 16:12875–12896.  https://doi.org/10.5194/acp-16-12875-2016 CrossRefGoogle Scholar
  7. Brunetti M, Maugeri M, Monti F, Nanni T (2006) Temperature and precipitation variability in Italy in the last two centuries from homogenised instrumental time series. Int J Climatol 26:345–381.  https://doi.org/10.1002/joc.1251 CrossRefGoogle Scholar
  8. Craddock JM (1979) Methods of comparing annual rainfall records for climatic purposes. Weather 34:332–346CrossRefGoogle Scholar
  9. Deserti M, Di Giosa A, Stel F, et al (2016) La qualità dell’aria in Italia negli anni. Focus su Inquinamento atmosferico nelle aree urbane ed effetti sulla salute. ISPRA 68/2016Google Scholar
  10. Floutsi AA, Korras-Carraca MB, Matsoukas C, Hatzianastassiou N, Biskos G (2016) Climatology and trends of aerosol optical depth over the Mediterranean basin during the last 12 years (2002-2014) based on Collection 006 MODIS-Aqua data. Sci Total Environ 551–552:292–303.  https://doi.org/10.1016/j.scitotenv.2016.01.192 CrossRefGoogle Scholar
  11. Founda D, Kalimeris A, Pierros F (2014) Multi annual variability and climatic signal analysis of sunshine duration at a large urban area of Mediterranean (Athens). Urban Clim 10:815–830.  https://doi.org/10.1016/j.uclim.2014.09.008 CrossRefGoogle Scholar
  12. Georgoulias AK, Alexandri G, Kourtidis KA, Lelieveld J, Zanis P, Amiridis V (2016) Differences between the MODIS Collection 6 and 5.1 aerosol datasets over the greater Mediterranean region. Atmos Environ 147:310–319.  https://doi.org/10.1016/j.atmosenv.2016.10.014 CrossRefGoogle Scholar
  13. Hakuba MZ, Folini D, Sanchez-Lorenzo A, Wild M (2013) Spatial representativeness of ground-based solar radiation measurements. J Geophys Res Atmos 118:8585–8597.  https://doi.org/10.1002/jgrd.50673 CrossRefGoogle Scholar
  14. Kambezidis HD, Kaskaoutis DG, Kalliampakos GK, Rashki A, Wild M (2016) The solar dimming/brightening effect over the Mediterranean Basin in the period 1979–2012. J Atmos Solar-Terrestrial Phys 150–151:31–46.  https://doi.org/10.1016/j.jastp.2016.10.006 CrossRefGoogle Scholar
  15. Kazadzis S, Founda D, Psiloglou BE, Kambezidis H, Mihalopoulos N, Sanchez-Lorenzo A, Meleti C, Raptis PI, Pierros F, Nabat P (2018) Long-term series and trends in surface solar radiation in Athens, Greece. Atmos Chem Phys 18:2395–2411.  https://doi.org/10.5194/acp-18-2395-2018 CrossRefGoogle Scholar
  16. Kotsias G, Lolis CJ (2017) A study on the total cloud cover variability over the Mediterranean region during the period 1979–2014 with the use of the ERA-Interim database. Theor Appl Climatol.  https://doi.org/10.1007/s00704-017-2276-5
  17. Lohmann U, Feichter J (2005) Global indirect aerosol effects: a review. Atmos Chem Phys 5:715–737.  https://doi.org/10.5194/acp-5-715-2005
  18. Lugauer M, Baltensperger U, Furger M, Gäggeler HW, Jost DT, Schwikowski M, Wanner H (1998) Aerosol transport to the high Alpine sites Jungfraujoch (3454 m asl) and Colle Gnifetti (4452 m asl). Tellus Ser B Chem Phys Meteorol 50:76–92.  https://doi.org/10.3402/tellusb.v50i1.16026 CrossRefGoogle Scholar
  19. Maggi V, Villa S, Finizio A, Delmonte B, Casati P, Marino F (2006) Variability of anthropogenic and natural compounds in high altitude-high accumulation alpine glaciers. Hydrobiologia 562:43–56.  https://doi.org/10.1007/s10750-005-1804-y CrossRefGoogle Scholar
  20. Magri T, Angelino E, Grosa M, et al (2016) Riscaldamento domestico a legna e qualità dell’aria nelle regioni dell’arco alpino. Focus su Inquinamento atmosferico nelle aree urbane ed effetti sulla salute. ISPRA 68/2016Google Scholar
  21. Manara V, Beltrano MC, Brunetti M, Maugeri M, Sanchez-Lorenzo A, Simolo C, Sorrenti S (2015) Sunshine duration variability and trends in Italy from homogenized instrumental time series (1936-2013). J Geophys Res 120:3622–3641.  https://doi.org/10.1002/2014JD022560 Google Scholar
  22. Manara V, Brunetti M, Celozzi A, Maugeri M, Sanchez-Lorenzo A, Wild M (2016a) Detection of dimming/brightening in Italy from homogenized all-sky and clear-sky surface solar radiation records and underlying causes (1959-2013). Atmos Chem Phys 16:11145–11161.  https://doi.org/10.5194/acp-16-11145-2016 CrossRefGoogle Scholar
  23. Manara V, Brunetti M, Maugeri M (2016b) Reconstructing sunshine duration and solar radiation long-term evolution for Italy: a challenge for quality control and homogenization procedures. In: 14th IMEKO TC10 Workshop Technical Diagnostics—new perspectives in measurements, tools and techniques for system’s reliability, maintainability and safety, pp 13–18Google Scholar
  24. Manara V, Brunetti M, Maugeri M, et al (2017a) Homogenization of a surface solar radiation dataset over Italy. In: Radiation processes in the atmosphere And Ocean (IRS 2016) - AIP Conference proceeding. AIP Publishing, pp 90004-1-90004–4Google Scholar
  25. Manara V, Brunetti M, Maugeri M, Sanchez-Lorenzo A, Wild M (2017b) Sunshine duration and global radiation trends in Italy (1959-2013): to what extent do they agree? J Geophys Res 122:4312–4331.  https://doi.org/10.1002/2016JD026374 Google Scholar
  26. Marty C, Philipona R, Frøhlich C, Ohmura A (2002) Altitude dependence of surface radiation fluxes and cloud forcing in the alps: results from the alpine surface radiation budget network. Theor Appl Climatol 72:137–155.  https://doi.org/10.1007/s007040200019 CrossRefGoogle Scholar
  27. Mateos D, Sanchez-Lorenzo A, Antón M, Cachorro VE, Calbó J, Costa MJ, Torres B, Wild M (2014) Quantifying the respective roles of aerosols and clouds in the strong brightening since the early 2000s over the Iberian Peninsula. J Geophys Res Atmos 119:10382–10393.  https://doi.org/10.1002/2014JD022076 CrossRefGoogle Scholar
  28. Norris JR, Wild M (2007) Trends in aerosol radiative effects over Europe inferred from observed cloud cover, solar “dimming” and solar “brightening”. J Geophys Res Atmos 112:1–13.  https://doi.org/10.1029/2006JD007794 CrossRefGoogle Scholar
  29. Novakov T, Ramanathan V, Hansen JE, Kirchstetter TW, Sato M, Sinton JE, Sathaye JA (2003) Large historical changes of fossil-fuel black carbon aerosols. Geophys Res Lett 30:1324.  https://doi.org/10.1029/2002GL016345 CrossRefGoogle Scholar
  30. Pfeifroth U, Sanchez-Lorenzo A, Manara V, Trentmann J, Hollmann R (2018) Trends and variability of surface solar radiation in Europe based on surface- and satellite-based data records. J Geophys Res Atmos 123:1735–1754.  https://doi.org/10.1002/2017JD027418 Google Scholar
  31. Philipona R (2013) Greenhouse warming and solar brightening in and around the Alps. Int J Climatol 33:1530–1537.  https://doi.org/10.1002/joc.3531 CrossRefGoogle Scholar
  32. Ramanathan V, Crutzen PJ, Kiehl JT, Rosenfeld D (2001) Aerosols, climate, and the hydrological cycle. Science 294:2119–2124.  https://doi.org/10.1126/science.1064034 CrossRefGoogle Scholar
  33. Ruckstuhl C, Philipona R, Behrens K, Collaud Coen M, Dürr B, Heimo A, Mätzler C, Nyeki S, Ohmura A, Vuilleumier L, Weller M, Wehrli C, Zelenka A (2008) Aerosol and cloud effects on solar brightening and the recent rapid warming. Geophys Res Lett 35.  https://doi.org/10.1029/2008GL034228
  34. Sanchez-Lorenzo A, Wild M (2012) Decadal variations in estimated surface solar radiation over Switzerland since the late 19th century. Atmos Chem Phys 12:8635–8644.  https://doi.org/10.5194/acp-12-8635-2012 CrossRefGoogle Scholar
  35. Sanchez-Lorenzo A, Wild M, Brunetti M, Guijarro JA, Hakuba MZ, Calbó J, Mystakidis S, Bartok B (2015) Reassessment and update of long-term trends in downward surface shortwave radiation over Europe (1939-2012). J Geophys Res Atmos 120:9555–9569.  https://doi.org/10.1002/2015JD023321 CrossRefGoogle Scholar
  36. Sanchez-Lorenzo A, Enriquez-Alonso A, Calbó J, González JA, Wild M, Folini D, Norris JR, Vicente-Serrano SM (2017) Fewer clouds in the Mediterranean: consistency of observations and climate simulations. Sci Rep 7:1–10.  https://doi.org/10.1038/srep41475 CrossRefGoogle Scholar
  37. Sanroma E, Palle E, Sanchez-Lorenzo A (2010) Long-term changes in insolation and temperatures at different altitudes. Environ Res Lett 5:24006.  https://doi.org/10.1088/1748-9326/5/2/024006 CrossRefGoogle Scholar
  38. Schwarz M, Folini D, Hakuba MZ, Wild M (2017) Spatial representativeness of surface-measured variations of downward solar radiation. J Geophys Res Atmos 122:13,319–13,313,337. doi:  https://doi.org/10.1002/2017JD027261
  39. Sen PK (1968) Estimates of the regression coefficient based on Kendall’s tau. J Am Stat Assoc 63:1379–1389.  https://doi.org/10.1080/01621459.1968.10480934 CrossRefGoogle Scholar
  40. Sneyers R (1992) On the use of statistical analysis for the objective determination of climate change. Meteorol Zeitschrift 1:247–256Google Scholar
  41. Stanhill G (1983) The distribution of global solar radiation over the land surfaces of the Earth. Sol Energy 31:95–104CrossRefGoogle Scholar
  42. Stephens GL, Li J, Wild M, Clayson CA, Loeb N, Kato S, L'Ecuyer T, Stackhouse PW, Lebsock M, Andrews T (2012) An update on Earth’s energy balance in light of the latest global observations. Nat Geosci 5:691–696.  https://doi.org/10.1038/ngeo1580 CrossRefGoogle Scholar
  43. Stockli R, Duguay-Tetzlaff A, Bojanowski J et al (2017) CM SAF ClOud Fractional Cover dataset from METeosat First and Second Generation—Edition 1 (COMET Ed. 1). Satell Appl Facil Clim Monit.  https://doi.org/10.5676/EUM_SAF_CM/CFC_METEOSAT/V001
  44. Suter S, Konzelmann T, Mühlhäuser C et al (2006) SwissMetNet—the new automatic meteorological network of Switzerland: transition from old to new network, data management and first results. In: Proc 4th Int Conf Exp with Autom Weather Station (4th ICEAWS)Google Scholar
  45. Tang W, Yang K, Qin J, Niu X, Lin C, Jing X (2017) A revisit to decadal change of aerosol optical depth and its impact on global radiation over China. Atmos Environ 150:106–115.  https://doi.org/10.1016/j.atmosenv.2016.11.043 CrossRefGoogle Scholar
  46. Theil H (1950) A rank-invariant method of linear and polynomial regression analysis. Proceedings of the Royal Academy of Sciences:53, Part I: 386–392, Part II: 521–525, Part III: 1397–1412Google Scholar
  47. Turnock ST, Spracklen DV, Carslaw KS, Mann GW, Woodhouse MT, Forster PM, Haywood J, Johnson CE, Dalvi M, Bellouin N, Sanchez-Lorenzo A (2015) Modelled and observed changes in aerosols and surface solar radiation over Europe between 1960 and 2009. Atmos Chem Phys 15:9477–9500.  https://doi.org/10.5194/acp-15-9477-2015 CrossRefGoogle Scholar
  48. Twomey SA, Piepgrass M, Wolfe TL (1984) An assessment of the impact of pollution on global cloud albedo. Tellus 36B:356–366.  https://doi.org/10.1111/j.1600-0889.1984.tb00254.x CrossRefGoogle Scholar
  49. Vestreng V, Myhre G, Fagerli H, Reis S, Tarrasón L (2007) Twenty-five years of continuous sulphur dioxide emission reduction in Europe. Atmos Chem Phys 7:3663–3681.  https://doi.org/10.5194/acp-7-3663-2007 CrossRefGoogle Scholar
  50. Wild M (2009) Global dimming and brightening: a review. J Geophys Res 114:D00D16.  https://doi.org/10.1029/2008JD011470 Google Scholar
  51. Wild M (2016) Decadal changes in radiative fluxes at land and ocean surfaces and their relevance for global warming. Wiley Interdiscip Rev Clim Chang 7:91–107.  https://doi.org/10.1002/wcc.372 CrossRefGoogle Scholar
  52. Wild M, Folini D, Henschel F, Fischer N, Müller B (2015) Projections of long-term changes in solar radiation based on CMIP5 climate models and their influence on energy yields of photovoltaic systems. Sol Energy 116:12–24.  https://doi.org/10.1016/j.solener.2015.03.039 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Institute of Atmospheric Sciences and Climate, ISAC-CNRBolognaItaly
  2. 2.Department of Forecasting SystemsRegional Agency for Environmental Protection of PiedmontTurinItaly
  3. 3.Department of Environmental Science and PolicyUniversità degli Studi di MilanoMilanItaly

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