Meteorological Observations in National Park „Pirin“
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Meteorological Observations in National Park „Pirin“ K. Grunewald, E. Gachev, G. Kast, P. Nojarov, M. Panayotov The Observation Team Dr. Karsten Grunewald Landscape ecologist Leibniz Institute of Ecological Urban and Re- Operator of Pirin stations and gional Development, Dresden, loggers Germany ([email protected]) Gerhard Kast Engineer UP GmbH Cottbus, Germany Providing and maintenance of technical equipment, data handling ([email protected]) www.upgmbh.com Dr. Peter Nojarov Climatologist National Institute of Geophysics, Geodesy Processing climate data and Geography, Bulgarian Academy of Sciences, Sofia, Bulgaria ([email protected]) Dr. Momchil Panayotov Forester, Dendrochronologist University of Forestry, Dendrology Dept., Climate reconstruction and climate- Sofia, Bulgaria growth-relationship in forest eco- systems ([email protected]) Dr. Emil Gachev Geographer South-West University “Neofit Rilski”, Glacier morphology and measure- Department of Geography and Ecology, ments on Vihren peak Blagoevgrad, Bulgaria ([email protected]) Directorate of National Park Pirin Bansko, Bulgaria ([email protected]) Impressum Editors: K. Grunewald, E. Gachev, G. Kast, P. Nojarov, M. Panayotov Photos: K. Grunewald, M. Panayotov, E. Gachev Layout: K. Ludewig, K. Grunewald Print: IÖR Dresden Bansko, Sofia, Dresden 2016 DOI: 10.13140/RG.2.1.3805.4160 Meteorological Observations in National Park „Pirin“ 1 source: stepmap.com Southwest Bulgaria and the Pirin Mountains are one of the European Biodiversity hotspots providing habitats for numerous endemic species. The mountains experience on-going climate change with unpredictable effects, which require better understanding of possible effects and continuous monitoring. The climate in the region is mountainous with strong influence of Mediterranean air masses. Vertical layering of temperature and local relief influence the climate and often lead to thermal inversions sites. Therefore. the climate in the Pirin Mountains and adjacent areas shows a strong differentiation driven by a variety of influences: air stream. solar radiation. lee- and windward effect, mountain wind, vertical distribution of temperature and precipitation. Typical for Pirin Mountains are dry summer months (July-August) and abundant precipitation in the Autumn-Winter period. 2 Meteorological Observations in National Park „Pirin“ Climate Change? Annual air temperatures There is definite warming in high-mountain parts of southwestern Bulgaria during the measured period, with an increase of about 0.1°C/decade (0.4˚C/ decade for the last 30 years). 2014 was the warmest recorded year during the last 83 years. Threshold values and extremes Musala Peak station, 2,925 m, shows the following extremes for the period 1973-2006: − a significant shift from cold to warm days; − an increase of days with frost change, especially in April and September / October; − a general decrease of days with temperatures below 0°C; − a significantly longer growing season (>5°C); − a trend towards shorter winters and longer summers. Summer ski in Pirin Evolution of mean annual air temperature at Musala Peak for the (Photo: Kletcherov 1961) period 1933 – 2015 Meteorological Observations in National Park „Pirin“ 3 Overview No. Name/Region Altitude Records Device type Start 1 Vihren peak 2,914 m Temperature (T), Humidity (H) ESAYLOG 24RFT 2014 2 Kasan Shelter, 2,436 m T, H, Precipitation (P) GP1 Delta-Link 2011 snowline 3 Vihren hut 1,950 m T, H, P, Wind, Radiation GP1 Delta-Link 2008 4 Banderitsa 1,950 m T Logtag TRIX 2012 5 Banderitsa, 2,250 m T, H HOBO 2013 treeline 6 Yavorov hut, 2,250 m T, H (2014-onwards) HOBO 2013 treeline source: NP Pirin 4 Meteorological Observations in National Park „Pirin“ History 1933 Start of meteorological observations at Musala peak (Rila) 1957-1960 Measurements in Kasan cirque operated by V. Popov 1951-1980 Manual observations at station Vihren hut 2003 New National Park Management Plan calls for 5 stations 2008 Automatic meteorological station Vihren hut established 2011 Automatic meteorological station Kasan shelter established 2012-2014 Loggers installed in several forest locations in- cluding treeline 2014 Logger on Vihren top installed 1930 Meteorological Observations in National Park „Pirin“ 5 Meteorological Station „Vihren Hut“ The station is located in front of the Vihren hut on the left side of the Banderitsa river. The aim is the measurement of the mountain climate at the timberline in Pirin National Park. Data record 1954-1978 − mean annual air temperature: 3.4°C − mean annual precipitation: 1,419 mm Wind rose (2014); max. wind speed: 109 km/h ► Data available: www.v2.upgmbh-logstar.de ◄ Vihren hut 2010-2015 – monthly records (means) J F M A M J J A S O N D Year H (%) 64.3 63.1 68.5 67.5 74.3 68.3 66.3 64.3 75.0 65.6 64.2 63.7 67.1 T (°C) -3.5 -3.2 -1.5 2.7 7.7 11.3 14.0 14.4 8.6 5.5 4.3 -2.1 4.9 Tmin (°C) -19.8 -17.3 -13.3 -11.3 -1.4 0.3 3.8 3.9 -0.4 -8.9 -10.8 -18.2 -19.8 Tmax (°C) 10.1 11.8 10.1 17.6 23.9 31.6 33.6 31.6 21.3 19.4 26.0 10.9 33.6 P (mm) 13.5* 13.3* 36.3* 91.1 65.4 50.4 32.7 17.2 39.1 106 129 15.6* 610* E (mm) 17.5 17.3 16.9 31.7 35.9 66.1 81.2 84.5 43.1 33.9 25.9 17.4 39.3 W (km/h) 11.8 14.4 10.4 14.3 9.7 7.7 6.9 7.0 10.0 11.1 9.1 13.1 10.5 R (W/m²) 125 174 226 319 285 375 375 314 141 166 122 108 228 H - humidity, T - temperature, P - precipitation, E – evaporation (Haude), W - wind speed, R - solar radiation * Precipitation especially in cold month (snow) is underestimated 6 Meteorological Observations in National Park „Pirin“ Meteorological Station „Kasan Shelter“ The station is located near the Kasan Shelter in the cirque “Go- lemya Kasan”. The aim is the measurement of the mountain climate at the climatically snow line in Pirin National Park. It is near the small glacier “Sneshnika” – one of the southernmost in Europe. 1957-1961 2011-2015 Average of coldest three months -6.1°C -4.7°C (Dec.-Feb.) Average of warmest three month 7.2°C 10.0°C (June-Aug.) Annual mean air temperature ca. 0°C ca. 3°C Average amplitude 16 K 18 K (∆ coldest-warmest month) − Snow cover 7-8 month (Nov.-June) − Humidity: 68.3% (mean) − Evapotranspiration (Haude): 22.4 mm (mean) ► Data available: www.v2.upgmbh-logstar.de ◄ Characteristic of geo-factors in the cirque “Golemya Kasan”: Rock: Light-coloured marble rock (high Albedo: 25-30%) Morphology: Bowl form (three-sided framing of the NNE/NE-exposed cirques) Soils: Skeleton soils with humus-layers (pH 5-7; high Humus-, Corg and Nt-values) Vegetation: Alpine rock and scree communities, individual grass communities, insular shrubs Hydrology: Due to karstification, meltwater is quickly trickled away Meteorological Observations in National Park „Pirin“ 7 Logger Vihren Peak (2,914 m a.s.l.) Fig. First logger data compared to Musala station The automatic measurement site on Vihren peak is the second highest in Bulgaria. The mean annual temperature for the period 1. Nov. 2014 to 31. Oct. 2015 is −1.3°C. It is by 0.5°C higher than what was recorded at Musala peak for the same time pe- riod (www.stringmeteo.com). The average relative humidity for the 1 year period is 86%. Observation of Vihren Glacier-Patch „Sneshnika“ (size ca. 1 ha) − Legacy of „Little Ice Age“ − Visible sign of weather conditions / climate change − Survive despite global/regional warming 09/1959 09/1994 09/2015 8 Meteorological Observations in National Park „Pirin“ Additional Measurements Loggers at treeline and forests locations – observation of local micro-climate and tree growth − Climate-growth relationships and formation of tree rings of the Balkan endemic species Pinus peuce and Pinus held- reichii − Forest dynamics – forest structure, history and regeneration − Treeline changes − Soil temperature Automatic gauging station Demjanitsa river (started 2011) The spring flood 15/16 May 2010, river Banderitsa/Glazne, Bansko Air-temperature (LT) and precipitation (NS) at the Vihren-hut during 14th, 15th and 16th May 2010, measured with the new meteorological station Vihren hut Meteorological Observations in National Park „Pirin“ 9 Literature on the Topic (selection) Anonymous 2003. National Park Pirin Management Plan 2004–2013. Ministry of Environment and Water, NP Direction. Bansko. Grunewald, K. (2013) Climate change and related management issues in the mountains of Southeastern Europe – the Pirin National Park in Bulgaria. eco.mont. Vol. 5, Number 1, 37-42 Grunewald, K., Scheithauer. J. (2011) Landscape development and climate change in Southwest Bulgaria (Pirin Mts.). Springer Verlag, Heidelberg, London, New York Grunewald, K., Scheithauer, J., Monget, J.-M., Brown, D. (2009) Characterisation of contemporary local climate change in the mountains of south-western Bulgaria. Climatic Change, Vol. 95, No. 3-4 Nojarov, P. 2012. Changes in air temperatures and atmosphere circulation in high mountainous parts of Bulgaria for the period 1941–2008. Journal of Mountain Science 9: 185–200. Nojarov, P. 2012. Variations in precipitation amounts. atmosphere circulation and relative humidity in high mountainous parts of Bulgaria for the period 1947–2008. Theoretical and Applied Climatology 107 (1–2): 175–187. Nojarov, P. 2012. Bulgarian mountains air temperatures and precipitation – statistical downscaling of global cli- mate models and some projections. Theoretical and Applied Climatology 110 (4): 631–644. Nojarov, P. 2015. Statistical downscaling of regional climate models in Bulgarian mountains and some projec- tions. Theoretical and Applied Climatology, 119(1-2):83-98.