Abstract
This study presents a review on Holocene glacial traces in Bulgaria. Pleistocene glaciation in this territory was spread over a number of mountains above 2000 m a. s. l., while in the later time, it was restricted only to the highest areas of the two highest mountains, Pirin and Rila. Two major phases can be distinguished on the basis of field evidence—a Little Ice Age (LIA) phase, and a present-day phase. Features of present-day glaciation are only found in the Pirin Mountains, in the highest parts of Northern Pirin which are built of carbonate rocks (marble). The two glacierets in these mountains, which are now the southernmost glacial masses in Europe, occupy only c. 1.5 ha. Several permanent snow patches are also found to fill the bottoms of high altitude karst dolines in the same area, contributing to a total of 3.5 ha of firn and ice, which have not completely melted for several centuries. The post-LIA climatic warming, which has progressed with an increased pace for the last 3 decades, reduced the glaciated area in the highest mountains of Bulgaria by 58%. However, glacierets and snow patches in Bulgaria have appeared to be more stable when compared to most other locations with similar topographic setting in Southeastern Europe.
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References
Baltakov G (2004) Glacialna morfogeneza vav visokoplaninskia pojas na Bulgaria svarzana s kupolen tip lednici (Glacial morphogenesis in the high-mountain zone of Bulgaria associated with dome glaciers). Probl Geogr 1:71–79 (in Bulgarian)
Baltakov G, Mladenova V (1989) Some typical Late Glacial geomorphic phenomena in the Rila mountain. Geogr Rhodopica 1:191–193
Bereiter B, Eggleston S, Schmitt J, Nehrbass‐Ahles C, Stocker TF, Fischer H, Kipfstuhl S, Chappellaz J (2015) Revision of the EPICA Dome C CO2 record from 800 to 600 kyr before present. Geophys Res Lett 42:542–549
Blumel WD (2002) 2000 Jahre Klimawandel und Kulturgeschichte—von die Eiszeit in die Gegenwart. Wechselwirkungen—Jahrbuch aus Lehre und Forschung der Universitat Stuttgart, Stuttgart
Bozhilova E (1978) Promeni na rastitelnostta v Rila prez poslednite dvanadeset hiliadi godini. Vegetation changes in the Rila Mountains in the last 12,000 years. Annual Journal of Sofia University, Fac. Biol., book-2. Botany 71:39–44
Burić M, Micev B, Mitrović L (2012) Atlas klime Crne gore (Climate Atlas of Montenegro). CANU, Podgorica
Çiner A, Stepišnik U, Sarikaya MA, Žebre M, Yildirim C (2019) Last glacial maximum and Younger Dryas piedmont glaciations in Blidinje, the Dinaric Mountains (Bosnia and Herzegovina): insights from 36Cl cosmogenic dating. Mediterr Geosci Rev. https://doi.org/10.1007/s42990-019-0003-4
Colucci R (2016) Geomorphic influence on small glacier response to post Little Ice Age climate warming: Julian Alps, Europe. Earth Surf Process Landf 41(9):1227–1240
Crowley TJ (1996) Remembrance of things past: greenhouse lessons from the geologic record. Consequences 2(1):3–12
Cvijić J (1897) Tragovi starih gletcera na Rili. (Old glacier trogs in Rila). Glas Srpske Kraljevske Akademije Nauka 54, Belgrade
Cvijić J (1908) Beobachtungen uber die Eiszeit auf der Balkanhalbinsel, in dem Sudkarpathen und auf dem mysischen Olymp. Zeitschrift fur Gletscherkunde 3:1–35
Dimitrov P, Velchev A (2012) The relict rock glaciers as a morphological feature in Rila mountain’s alpine zone. Ann J Sofia Univ Fac Geol Geogr Book 2 103:97–112
Djurović P (1999) Natural and anthropogenic influences as threats to pits in the Debeli namet glacier, Durmitor National park, Montenegro. Contribucion del estudio cientifico de las cavidades karsticas al conocimiento geologico. Malaga
Djurović P (2009) Reconstruction of the pleistocene glaciers of Mt. Durmitor in Montenegro. Acta Geogr Slov 49(2):263–289
Djurović P (2012) The Debeli Namet glacier from the second half of the 20th century to the present. Acta Geogr Slov 52:277
Gabrovec M, Ortar J, Pavšek M, Zorn M, Triglav-Čekada M (2013) The Triglav glacier between the years 1999 and 2012. Acta Geogr Slov 53(2):257
Gabrovec M, Hrvatin M, Komac B, Ortar J, Pavšek M, Topole M, Triglav Čekada M, Zorn M (2014) Triglavski ledenik. Geografija Slovenije, 30th edn. SANU, Ljubljana
Gachev E (2011) Inter-annual size variations of Snezhnika glacieret (the Pirin mountains, Bulgaria) in the last 10 years. Stud Geomorphol Carpatho Balcan 45:47–68
Gachev E (2014) Ima li lednitsi na Balkanskia poluostrov (Are there glaciers on the Balkan Peninsula?). Priroda 1:96–103
Gachev E (2016) Klimatichni faktori za mezhdugodishnata dinamika na mikrolednik Snezhnika v Pirin. Climatic factors for the inter-annual dynamics of Snezhnika glacieret in Pirin. In: Proceedings of the scientific conference “geographical aspects of spatial planning and utilization in global change conditions”, Bulgarian Geographic Society, Varshets, Bulgaria, 09. 2016
Gachev E (2017) The unknown southernmost glaciers of Europe. In: Godone C (ed) glaciers. InTech Publishers, Zagreb
Gachev E (2018) Characteristics and evolution of the rock glacier near Musala peak (Rila Mountains, Bulgaria). Stud Geomorphol Carpatho Balcan 51:25–42
Gachev E, Gikov A (2010) Opisanie i parvo izmervane na snezhnika v tsirkusa Banski suhodol. (A description and a first measurement of the glacieret in Banski suhodol cirque.). Probl Geogr Bulg Acad Sci 3:90–98 (in Bulgarian)
Gachev E, Mitkov I (2019) Small glaciers in Pirin (Bulgaria) and Durmitor (Montenegro) as glacio-karstic features. Similarities and differences in their recent behaviour. Quatern Int 504:153–170
Gachev E, Stoyanov K (2012) Present-day perennial firn/ice patches in the mountains of the Western Balkan Peninsula. Stud Geomorphol Carpatho Balcan 46:51–70
Gachev E, Gikov A, Gacheva I, Nojarov P, Popov M (2008) Morfologia na dunoto na Ledenoto ezero (Rila) i nejnata vruzka s kvaternernata evolyutsia na relefa. Morphology of the bottom of Ledeno ezero (Rila) and its relation to the Quaternary evolution of relief. Probl Geogr Bulg Acad Sci 3:97–106 (in Bulgarian)
Gachev E, Gikov A, Zlatinova C, Blagoev B (2009) Present state of Bulgarian glacierets. Landf Anal 11:16–24
Gachev E, Stoyanov K, Gikov A (2016) Small glaciers on the Balkan Peninsula: state and changes in the last several years. Quat Int 415:32–54
Gachev E, Magori B, Sirbu F-S, Stoyanov K, Ivanov M (2017) Field observations of rock glaciers in the mountains of Bulgaria. Probl Geograph Bulg Acad Sci 3:55–66
Gądek B (1998) Würmskie zlodowacenie Tatr w swietle rekonstrukcji lodowcow wybranych dolin na podstawie prawidlowosci glacjologicznych. Wuermian glaciation of the Tatras in the light of the reconstruction of selected valley glaciers on the basis of glacial evidence. Prace Naukowe Uniwersytetu Slaskiego w Katowicach, Katowice, 1741 (in Polish)
Georgiev M (1991) Fizicheska geografia na Bulgaria (Physical geography of Bulgaria). Sofia University Press, Sofia, p 406 (in Bulgarian)
Glovnia M (1958) Geomorfolozhki prouchvanija v Yugozapadnia dyal na Rila planina (Geomorphological researches in Southwestern Rila mountain). Annu J Sofia Univ GGF Geogr 51(3):68–103 (in Bulgarian)
Glovnia M (1962) Prouchvania na glacialnata morfoskulptura v Iztochnia dyal na Rila planina (Researches of glacial morphosculpture in the Eastern share of Rila mountain). Annu J Sofia Univ GGF Geogr 55(2):1–47 (in Bulgarian)
Glovnia M (1968) Glacialen i periglacialen relef v yuzhnata chast na Sredna Rila (Glacial and Periglacial relief in the southern part of Central Rila mountain). Annu J Sofia Univ GGF Geogr 61(2):37–66 (in Bulgarian)
Gore A (2006) An inconvenient truth. Rodale Press, New York, p 328
Grunewald K, Scheitchauer J (2010) Europe’s southernmost glaciers: response and adaptation to climate change. Glaciology 56:129–142
Grunewald K, Scheitchauer J (2011) Landscape development and climate change in Southwest Bulgaria (Pirin mountains). Springer, New York, p 161
Grunewald K, Scheithauer J (2008a) Holocene climate and landscape history of the Pirin Mountains (Southwest Bulgaria). In: Borsdorf A, Stotter J, Veulliet E (eds) Managing Alpine future. IGF-Forschungs-Berichte, Dresden, pp 305–312
Grunewald K, Scheithauer J (2008b) Climate and landscape history of Southeast Europe. A geoarchive based reconstruction for the Pirin Mountains (Bulgaria). Rhombos Verlag, Dresden, p 180 (in German)
Grunewald K, Scheithauer J, Gikov A (2008) Mikrolednitsi v Pirin planina. Glacierets in the Pirin Mountains. Probl Geogr Bulg Acad Sci 1–2:159–173
Hohenwarter G (2013) The Eiskar—115 years of measurements at the southernmost glacier in Austria. Meteorologica 102:26–28
Hughes PD (2007) Recent behaviour of the Debeli Namet glacier, Durmitor, Montenegro. Earth Surf Process Landf. https://doi.org/10.1002/esp.1537
Hughes PD (2008) Response of a Montenegro glacier to extreme summer heatwaves in 2003 and 2007. Geogr Ann 90A:259–267. https://doi.org/10.1111/j.1468-0459.2008.00344.x
Hughes PD (2009) Twenty-first century glaciers in the Prokletije Mountains, Albania. Arct Antarct Alp Res 41:455–459
Hughes PD (2010) Little Ice Age glaciers in the Balkans: low altitude glaciation enabled by cooler temperatures and local topoclimatic controls. Earth Surf Proc Landf 35(2):229–241
Hughes PD (2014) Little Ice Age glaciers in the Mediterranean mountains. Mediterrannee 122:63–79
Hughes PD (2018) Little ice age glaciers and climate in the Mediterranean mountains: a new analysis. Geogr Res Lett 44(1):15–45
Hughes PD, Woodward JC (2008) Timing of glaciation in the Mediterranean mountains during the last cold stage. J Quat Sci. https://doi.org/10.1002/jqs.1212
Hughes PD, Woodward JC, Gibbard PL, Macklin MG, Glimour MA, Smith GR (2006) The glacial history of the Pindus Mountains, Greece. J Geol 114:413–434
Hughes PD, Gibbard PL, Woodward JC (2007) Geological controls on Pleistocene glaciation and cirque form in Greece. Geomorphology 88(3):242–253
Hughes PD, Woodward JC, van Calsteren PC, Thomas LE, Adamson KR (2010) Pleistocene ice caps on the coastal mountains of the Adriatic Sea. Quat Sci Rev 29:3690–3708
Hughes PD, Woodward JC, van Calsteren PC, Thomas LE (2011) The glacial history of the Dinaric Alps, Montenegro. Quat Sci Rev 30:3393–3412
Ivanov I (1954) Geomorfolozhki prouchvaniya v zapadnata chast na Severozapadna Rila (Geomorphological researches in the western part of Northwestern Rila mountain). Izvestia na Geografskiya institut. BAN 2:7–61 (in Bulgarian)
Janković P (1903) Glacial traces in Pirin Glas Crpske kraljevske akademije. Belgrade 65(25):163–178 (in Serbian)
Janković P (1908) Der Pirin. In: Dr. A. Petermanns, Mitteilungen aus Justus perthes’ geographischer anstalt. Herausgegeben von Prof. Dr. A. Supan. Ergänzungsband XXXIV (Heft 158–162). Inhalt: Nr. 162. (in German)
Jouzel J, Vimeux F, Caillon N, Delaygue G, Hoffmann G, Masson-Delmotte V, Parrenin F (2003) Magnitude of isotope/temperature scaling for interpretation of central Antarctic ice cores. J Geophys Res. https://doi.org/10.1029/2002JD002677
Kachaunova E, Stefanova I (1999) The upper forest limit in North Pirin Mountain—past, present and future. In: Proceedings of the 1st congress of ecologists of Macedonia with International Participation. Special issues of MES, vol 5, Skopje
Kłapyta P, Zasadni J (2018) Research history on the Tatra Mountains glaciations. Stud Geomorphol Carpatho Balcan, 54, pp 43–85
Kuhlemann J, Gachev E, Gikov A, Nedkov S (2008) Glacial extent in Rila mountain (Bulgaria) as part of an environmental reconstruction of the Mediterranean during the last glacial maximum (LGM). Probl Geogr Bulg Acad Sci 3:87–96
Kuhlemann J, Milivojević M, Krumrei I, Kubik PW (2009) Last glaciation of the Sara Range (Balkan Peninsula): increasing dryness from the LGM to the Holocene. Aust J Earth Sci 102(1):146–158
Kuhlemann J, Gachev E, Gikov A, Nedkov S, Krumrei I, Kubik P (2013) Glaciation in the Rila Mountains (Bulgaria) during the last glacial maximum. Quat Int 293:51–62
Lilienberg D, Popov V (1966) Novie dannye ob oledenenii Pirin (Rodopy) New data about the glaciation of Pirin (Rhodopes). Doklady AN SSSR 167:5 (in Russian)
Louis H (1930) Morphologische Studien in Sudwest Bulgarien. VN Krebs, Stuttgart, p 108
Lüthi D, Le Foch M, Bereiter B, Blunier T, Barnola J-M, Siegenthaler U, Raynaud D, Jouzel J, Fischer H, Kawamura K, Stocker TF (2008) High-resolution carbon dioxide concentration record 650,000–800,000 years before present. Nature 453:379–382
Marcott SA, Shakun JD, Clark PU, Mix AC (2013) A reconstruction of regional and global temperature for the past 11,300 years. Science 339(6124):1198–1201
Marjanac L, Marjanac T (2004) Glacial history of the Croatian Adriatic and coastal Dinarides. In: Ehlers J, Gibbard PL (eds) Quaternary glaciations—extent and chronology. Part I: Europe. Elsevier, Amesterdam, pp 19–26
Milivojević M (2019) Metodologija rekonstruisanja planinske pleistocene glacijacije na primeru Dinarsko-prokletijskih planina. Methodology for a reconstruction of Pleistocene glaciation by the example of Dinaric-Prokletije Mountains. A PhD thesis. Faculty of Geography, University of Belgrade, Serbia. (in Serbian)
Milivojević M, Menković LJ, Ćalić J (2008) Pleistocene glacial relief of the central part of Mt. Prokletije (Albanian Alps). Quat Int 190:112–122. https://doi.org/10.1016/J.quaint.2008.04.006
Mitkov I (2020) Razvitie i savremenno sastoianie na lednikovia i kriogennia relef v izgradenite ot mramori chasti na Pirin. Evolution and present state of the glacial and cryogenic relief in the parts of Pirin built of marble. A PhD thesis. Blagoevgrad. (in Bulgarian)
Nikolov T (2011) Globalni izmenenia na klimatite v istoriata na Zemiata (Global changes of climates in Earth’s history). Marin Drinov (BAS) Publishing House, Sofia, p 396
Nojarov P (2008) Regime of air temperature on Musala peak for the period 1933–2007. Geography 21(2):14–19
Nojarov P (2012) Variations in precipitation amounts, atmosphere circulation, and relative humidity in high mountainous parts of Bulgaria for the period 1947–2008. Theor Appl Climatol 107(1):175–187
Nojarov P, Gachev E, Grunewald K (2019) Recent behavior and possible future evolution of the glacieret in the cirque Golemiya Kazan in the Pirin Mountains under conditions of climate warming. J Mount Sci 16(1):16–29
Osnovna Geološka Karta SFRJ (1983) 1:100 000 (General geological map of Yugoslavia)
Parrenin F, Barnola J-M, Beer J, Blunier T, Castellano E, Chappellaz J, Dreyfus G, Fischer H, Fujita S, Jouzel J, Kawamura K, Lemieux-Dudon B, Loulergue L, Masson-Delmotte V, Narcisi B, Petit J-R, Raisbeck G, Raynaud D, Ruth U, Schwander J, Severi M, Spahni R, Steffensen JP, Svensson A, Udisti R, Waelbroeck C, Wolff E (2007) The EDC3 chronology for the EPICA Dome C ice core. Clim Past 3:485–497
Pavšek M (2004) Ledenik pod Skuto: ledeniški dragulj na senčini strain Kamniško-Savinjskih Alp. Geogr Obzornik 51(3):11–17
Pavšek M (2007) Ledenik pod Skuto kod pokazatelj podnebnih sprememb v slovenskem delu Alp. (The Skuta glacier as an indicator of climate changes in Slovenian part of the Alps). Dela 28:207–219
Pecci M, D’Agata C, Smiraglia C (2008) Ghiacciaio del Calderone (Apennines, Italy): the mass balance of a shrinking glacier. Geogr Fis Dinam Quat 31:55–62
Peev H (1960) Za niakoi savremenni lednikovi formi v Pirin planina (About some present-day glacial features in the Pirin Mountain). Priroda (Nature) 1:34–41
Peev H (1961) Prinos kam vaprosa za obrazuvaneto na savremenni lednikovi formi v Pirin (A contribution to the issue about the formation of present-day glacial features in Pirin). Hidrol Meteorol (Hydrol Meteorol) 3:22–26 (in Bulgarian)
Popov V (1962) Morfologia na tsirkusa Golemia Kazan—Pirin planina (Morphology of the cirque Golemia Kazan—Pirin mountains). Announc Inst Geogr 6:86–99 (in Bulgarian)
Popov V (1964) Nabljudenia varhu snezhnika v tsirkisa Golemia Kazan—Pirin planina (Observations on the glacieret in the cirque Golemia Kazan, the Pirin mountains). Announc Inst Geogr Bulg Acad Sci 8:198–207
Radev Z (1920) Prirodna skulptura na visokite bulgarski planini. Natural sculpture of high Bulgarian mountains. Nature, Sofia (in Bulgarian)
Rovelli E (2006) Il Ghiacciaio del Calderone: riconstruzione delle oscillazioni recenti mediante l’analisi delle fonti iconografico-storiche e meteo-climatiche (Calderone glacier: reconstruction of recent oscillations through the analysis of the iconographic-historical and meteo-climatic sources (Gran Sasso, Abruzzo, Italy)). Terra Glac 9:9–46
Ruddiman WF (2001) Earth’s climate. Past and future. Freeman and Co., New York, p 465
Ruddiman WF (2005) How did humans first alter global climate? Sci Am 3:34–41
Ruddiman WF, Fuller DQ, Kutzbach JE, Tzedakis PC, Kaplan JO, Ellis EC, Vavrus SJ, Roberts CN, Fyfe R, He F, Lemmen C, Woodbridge J (2016) Late Holocene climate: natural or anthropogenic? Rev Geophys 54:93–118. https://doi.org/10.1002/2015RG000503
Santin I, Colucci R, Žebre M, Pavan M, Cagnati A, Forte E (2019) Recent evolution of Marmolada glacier (Dolomites, Italy) by means of ground and airborne GPR surveys. Remote Sens Environ. https://doi.org/10.1016/j.rse.2019.111442
Scotti R, Brardinoni F (2018) Evaluating millennial to contemporary time scales of glacier change in Val Viola, Central Italian Alps. Geogr Ann Ser A Phys Geogr 100:1–21. https://doi.org/10.1080/04353676.2018.1491312
Stefanova I, Ammann B (2003) Lateglacial and Holocene vegetation belts in the Pirin Mountains (Southwestern Bulgaria). Holocene 13(1):97–107
Stefanova I, Ognjanova-Rumenova N, Hofmann W, Ammann B (2003) Late glacial and Holocene history of the Pirin Mountains (SW Bulgaria): a paleolimnological study of Lake Dalgoto (2310 m). J Paleolimnol 30:95–111
Stefanova I, Atanassova J, Delcheva M, Wright H (2006) Chronological framework for the lateglacial pollen and macrofossil sequence in the Pirin Mountains, Bulgaria: Lake Besbog and Lake Kremensko-5. Holocene 16(6):1–16
Styllas MN, Schimmelpfennig I, Ghilardi M, Benedetti L (2016) Geomorphic and palaeoclimatic evidence of Holocene glaciation on Mount Olympus, Greece. Holocene 26:709–721
Tonkov S, Marinova E (2005) Pollen and plant macrofossil analyses of radiocarbon dated mid-Holocene profiles from two subalpine lakes in the Rila mountains, Bulgaria. Holocene 15:663–671
Tonkov S, Possnert G, Bozhilova E (2006) Lateglacial vegetation and radiocarbon dating of Lake Trilistnika, Rila Mountains (Bulgaria). Veg Hist Archaeobot 16:15–22
Tonkov S, Bozhilova E, Possnert G, Velchev A (2008) A contribution to the postglacial vegetation history of the Rila mountains, Bulgaria: the pollen record of lake Trilistnika. Quat Int 190:58–70
Triglav Čekada M, Gabrovec M (2013) Documentation of Triglav glacier, Slovenia, using non-metric panoramic images. Ann Glaciol 54(62):2013. https://doi.org/10.3189/2013AoG62A095
Triglav Čekada M, Zorn M, Colucci RR (2014) Površina kaninskih in triglavskega ledenika od leta 1893, določena na podlagi arhivskih posnetkov i aerolaserskih podatkov. Changes in the area of the Canin (Italy) and Triglav glaciers (Slovenia) since based on archive images and aerial laser scanning. Geod Vestnik 58(2):274–313
Vavrus S, He Feng, Kutzbach J, Ruddiman WF, Tzedakis P (2018) Glacial inception in marine isotope stage 19: an orbital analog for a natural Holocene climate. Sci Rep 8:10213. https://doi.org/10.1038/s41598-018-28419-5
Velchev A (1995) Pleistocenski zaledyavaniya v bulgarskite planini (The Pleistocene glaciations in Bulgarian mountains). Ann J Sofia Univ GGF Geogr 85(2):53–65 (in Bulgarian)
Velchev A (1999) Glacialen i kriogenen relef v chast ot Musalenskia dyal na Rila (Glacial and cryogenic relief in part of Musala share of Rila). Ann J Sofia Univ GGF Geogr 89(2):7–21 (in Bulgarian)
Velchev A, Todorov N, Kostadinov K (1994) Razvitie i savremenno sastoianie na subalpiiskite landshafti v Osogovska planina. Evolution and present state of the subalpine landscaped in Osogovo Mountains. Ann J Sofia Univ GGF Geogr Book 2 Geogr 85:181–198
Velchev A, Konteva M, Penin R, Todorov N (2000) Landshaftni osobenosti na Midzhur, Chiprovska planina. Landscape peculiarities of Midzor, Chiprovska Mountain. Ann J Sofia Univ Fac Geol Geogr Book 2 Geogr 90:111–131
Velev S (2010) Klimatat na Bulgaria (The climate of Bulgaria). Heron Press, Sofia, p 190
Wilkinson R (2011) A multi-proxy study of late holocene environmental change in the Prokletije Mountains, Montenegro and Albania. A PhD thesis, University of Manchester
Wright H, Ammann B, Stefanova I, Atanassova J, Margalitadze N, Wick L, Blyakharchuk T (2003) Late-glacial and early Holocene dry climates from the Balkan Peninsula to Southern Siberia. In: Tonkov S (ed) Aspects of palynology and paleoecology. PENSOFT Publishers, Sofia, pp 127–136
Žebre M, Sarikaya MA, Stepišnik U, Yildirim C, Çiner A, (2019) First 36Cl cosmogenic moraine geochronology of the Dinaric mountain karst: Velež and Crvanj Mountains of Bosnia and Herzegovina. Quat Sci Rev 208:54–75. http://www.stringmeteo.com. Bulgarian website for discussing weather
Acknowledgements
The collection of field data for this study was done in numerous campaigns (annually from 2008 to 2019) with funding from the following projects: Projects of the South-West University—RP-A 10/15 Complex research of embryonic glaciers on the Balkan Peninsula” (2015); RP-A 13/17 Investigation of climate variations through natural indicators: small glaciers and permafrost” (2017); RP-A 4/18 Investigation of climate variations through natural indicators: small glaciers and permafrost, part II (2018); International projects—BG0034 Preservation of glacial relict plants in Bulgaria” of the Institute of Botany, Bulgarian Academy of Sciences, EEA Grants Programme, 2009–2010. Research of global changes in high mountains by the example of lake areas in Rila (Bulgaria) and the Julian Alps (Slovenia). Bulgarian Scientific Research Agency, funded organization: National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, 2012–2014.
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Gachev, E. Holocene glaciation in the mountains of Bulgaria. Med. Geosc. Rev. 2, 103–117 (2020). https://doi.org/10.1007/s42990-020-00028-3
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DOI: https://doi.org/10.1007/s42990-020-00028-3