A5045145773- Geology and Paleoclimatology Research
- Karst Systems and Hydrogeology
- Maritime and Coastal Archaeology
- Astro and Planetary Science
- Solar and Space Plasma Dynamics
- Marine and environmental studies
- Geomagnetism and Paleomagnetism Studies
- Building materials and conservation
- Planetary Science and Exploration
- Earthquake Detection and Analysis
- Solar Radiation and Photovoltaics
- Atmospheric Ozone and Climate
- Landslides and related hazards
- 3D Surveying and Cultural Heritage
- Hydrocarbon exploration and reservoir analysis
- Methane Hydrates and Related Phenomena
- Geophysics and Gravity Measurements
- Infrared Target Detection Methodologies
- Space exploration and regulation
- Spacecraft and Cryogenic Technologies
- Remote Sensing and LiDAR Applications
- Plant Water Relations and Carbon Dynamics
- Climate variability and models
- Geophysical Methods and Applications
- Archaeological Research and Protection
Medical University of Sofia
2019-2023
Durban University of Technology
2020-2023
Sofia University "St. Kliment Ohridski"
2007-2023
McMaster University
1994
Research Article| May 01, 1994 Luminescent microbanding in speleothems: High-resolution chronology and paleoclimate Y. Shopov; Shopov 1Department of Geography, McMaster University, Hamilton, Ontario L8S 4K1, Canada Search for other works by this author on: GSW Google Scholar D. C. Ford; Ford H. P. Schwarcz 2Department Geology, 4M1, Geology (1994) 22 (5): 407–410. https://doi.org/10.1130/0091-7613(1994)022<0407:LMISHR>2.3.CO;2 Article history first online: 02 Jun 2017 Cite View This Citation...
This work summarizes the main results of operation International Program “Luminescence Cave Minerals” commission on Physical Chemistry and Hydrogeology Karst UIS UNESCO in field activators speleothem luminescence. It discusses Activators Luminescence Speleothems as a source major mistakes interpretation luminescent paleoclimatic records. demonstrates existence 6 types luminescence speleothems cave minerals dependence type center its incorporation mineral. 24 different photoluminescence...
Prehistoric astronomical observatories include a specific type of rock-cut monuments from the Mountainous Thrace in Bulgaria, with shape and orientation space, which are part characteristic representatives archeoastronomical sites on Balkan Peninsula period 4000–4500 BCE. Earlier societies focused triad “astronomical instrument”—celestial objects—trained observers. When choosing for construction oriented stone complexes observations, prehistoric people were interested number clear days...
We observed cycles presented in a luminescent solar insolation proxy record from speleothem Jewel Cave, South Dakota, US. found of orbital precession with periods 23 and 19 ka obliquity 41 many others non-orbital origin this sample. determined the Solar durations 11500, 4400, 3950, 2770, 2500, 2090, 1960, 1670, 1460, 1280, 1195, 1145, 1034, 935, 835, 750 610 years. It was done by their detection both records luminescence, Δ14C intensity geomagnetic dipole. is well known that main variations...
The luminescence of calcite speleothems displays an exponential dependence on soil temperature unless there is a dense cover forest over the cave to dampen it. This relationship determined primarily by strength solar visible and infrared radiation. It suggested that, as consequence, microzonal variations often found in can be used proxy index Solar Insolation. insolation record speleothem from Jewel Cave, South Dakota, USA, was display millenial centennial cycles record. exhibits rapid...
We studied various long solar wind proxy records in order to reveal prolonged cycles. Inverted rate of atmospheric 14C production as derived from the standard radiocarbon calibration curve represents good record past variations flux at upper atmosphere because it modulates galactic cosmic rays flux, which produces there. made periodogramme time series analysis inverted obtain In such a way, we found cycles 11 500, 1670, 1420, 1280, 924, 835, 787, 750, 663, 610, and 545 years this...
We used the quantitative theory of solubility karst rocks Shopov et. al, (1989, 1991a) in dependence temperature and other thermodynamic parameters to make reconstructions past carbonate denudation rates. This produced equations assessing rates on or precipitation. estimated averaged rate region 14 mm/kyr 38 t/km2 per year. this estimate as starting point substituted our proxy records annual precipitation temperature. way we reconstructed variations for last 280 years 1250 Both produce quite...
This paper discusses advance of the research on Speleothem Paleoluminescence Records Environmental Changes after it have been first introduced by author 20 years ago. It is demonstrated that most progress in this field was made result operation International Program “Luminescence Cave Minerals” commission Physical Chemistry and Hydrogeology Karst UIS UNESCO. Potential, resolution limitations high luminescence speleothem proxy records Paleotemperature, Solar Insolation, Luminosity,...
Abstract This work aims to create new scientific knowledge by developing innovative technology for remote detection of unknown underground cavities and deep-seated rockslides. To achieve the goal, we intend develop localization rockslides using a thermal camera mounted on unmanned aerial vehicle (UAV). Technology is defined sequence operations procedures under optimal conditions, varying within certain allowable limits, resulting in obtaining particular result or product that meets...
We analyze the solar impact on one of main Earth climate system components—the land-near-surface air temperature—during past 120 years. Using statistical analysis, a correlation between variations total irradiance and annual-mean temperatures was found. An unknown time lag both data sets expected to be present due complexity Earth's leading delayed response changes in influencing factors. found best with coefficient over 90% for 14-year shift annual mean land temperature record ahead before...
This work demonstrates the potential and limitations of archaeo-geophysical techniques available at Archaeological Geophysics Laboratory Department Physics University Sofia with various case studies in natural artificial environment. Special attention is focused on GPR which most powerful archaeogeophysical technique laboratory only one Bulgaria, develops new geophysical equipment for survey archaeological sites their dating.
This paper discusses advance of the research on Speleothem Paleoluminescence Records Environmental Changes after it have been first introduced by author 20 years ago. It is demonstrated that most progress in this field was made result operation International Program Luminescence Cave Minerals commission Physical Chemistry and Hydrogeology Karst UIS UNESCO. Potential, resolution limitations high luminescence speleothem proxy records Paleotemperature, Solar Insolation, Luminosity, Glaciations,...
This work summarizes the main results of operation International Program Luminescence Cave Minerals commission on Physical Chemistry and Hydrogeology Karst UIS UNESCO in field activators speleothem luminescence. It discusses Activators Speleothems as a source major mistakes interpretation luminescent paleoclimatic records. demonstrates existence 6 types luminescence speleothems cave minerals dependence type center its incorporation mineral. 24 different photoluminescence calcite 11 aragonite...