Princeton University Djengal at sunset
One of the most pleasant places in the Pirin mountains 
Posts by Collection
adventures
Hilo to Mauna Kea, 4200 m
Sea to summit, sunrise to sunset 
Mauna Loa observatory
A historical place for climate scientists 
publications
Climate Change and Regional Ocean Water Mass Disappearance: Case of the Black Sea
Published in , 2019
Argo float data from the Black Sea reveals the disappearance of a cold water mass. 
Interannual Change in Mode Waters: Case of the Black Sea
Published in , 2022
Mixing pathways in the Black Sea observed from Argo floats.
Geothermal Convection and Double Diffusion Based on Profiling Floats in the Black Sea
Published in , 2022
Deep Argo float data traces the sinking of the Bosphorus plume and reveals signatures of geothermal convection.
Internal Variability of All-Sky and Clear-Sky Surface Solar Radiation on Decadal Timescales
Published in , 2022
We explore all possible statistically insignificant trends of downwelling shortwave radiation for a given location that can occur due to internal variability given a Gaussian distribution and zero autocorrelation in time. 
Internal Variability of the Climate System Mirrored in Decadal-Scale Trends of Surface Solar Radiation
Published in , 2023
We link trends in known climate modes of variability to trends in downwelling surface shortwave radiation. We use this information to hypothesize whether internal variability had an enhancing or suppressing effect on observed radiation trends at certain locations. 
Shortwave Radiative Flux Variability Through the Lens of the Pacific Decadal Oscillation
Published in , 2024
Motivated by the observed correlation between the Pacific Decadal Oscillation index and observed downwelling shortwave radiation trends in Europe and the United States, we perform numerical simulations with ICON-A to investigate the dynamical pathway which links sea surface temperatures to cloudiness over remote regions.
Persistent Extreme Surface Solar Radiation and Its Implications on Solar Photovoltaics
Published in , 2024
An exploration of persistant high and low radiation events of relevance for photovoltaic power generation and grid planning.
Analytical insights into the transient climate response (preprint)
Published in , 2026
Solving the heat equation with energy conservative boundary conditions for linearly increasing forcing to understand the transient climate response and the trend in top of atmopshere imabalnce.
talks
Visit of CMCC
Published:
I visited the Euro-Mediterranean Center on Climate Change as part of my work on Black Sea modelling.
Identifying the Bosphorus plume using Argo float data
Published:
I gave a talk on a national seminar part of the Copernicus program.
Perennial snow patches in Bulgaria
Published:
I showed a poster with a few snow patches in Bulgaria, the microclimate of which we recorded using self-made small meteorological stations. The presentation was part of a national student conference on physics and engineering.
Analysis of the trends in the Black Sea water column temperature and heat content using CMEMS products
Published:
I presented my first poster at EGU.
Global warming effects on the Black Sea Cold Intermediate Layer
Published:
I gave a talk at the Meteorology and Geophysics department seminar.
The Black Sea Cold Intermediate Layer disappearance observed from Argo autonomous profilers
Published:
I attended the 7-th Euro-Argo Science Meeting and presented a poster.
Attended the Argo float technical workshop at Ifremer
Published:
I attended the Argo ARVOR/PROVOR float technical workshop at Ifremer, where I gained exposure to various measurement technicalities and exchanged with metrologists and manufacturers.
The impact of SST on the weather forecast quality in the Bulgarian Antarctic Base area on Livingstone Island
Published:
A poster at EGU.
A modelling system for numerical weather prediction in the Bulgarian Antarctic Base area
Published:
I presented my WRF modelling setup for the Bulgarian Antarctic Base on Livingston Island, Antarctica. There is an accompanying article in the conference proceedings [DOI] and we were invited to write a special edition book chapter [DOI].
Internal variability and unforced trends of all-sky and clear-sky SSR: quantitative estimates using CMIP6
Published:
A hybrid EGU talk.
Internal variability and unforced trends of all-sky and clear-sky SSR: quantitative estimates using CMIP6
Published:
A talk at EGU showing how noise is reduced with spatial averaging for different regions.
Insights from models: Is natural variability interfering with the shortwave trend I observe?
Published:
I gave a hybrid talk at the 17th WRCP/BSRN Scientific Review and Workshop.
Unforced inter annual variability of shortwave atmospheric absorption
Published:
I gave a talk at the International Radiation Symposiym 2022.
Attended the Earth System Modelling School at MPI-M
Published:
I was admitted to the Earth System Modelling School organised by MPI-M and DKRZ, where we run ICON-ESM and investigated the sensitivity of the climate system to different hypothetical states.
Internal variability of surface solar radiation under different background climate states
Published:
I gave a hybrid talk at the AGU fall meeting 2022.
Low-frequency modes in internal variability of surface solar radiation
Published:
A talk at EGU 2023.
Internal variability mirrored in decadal-scale trends of surface solar radiation
Published:
I gave a talk at the Climate and Water cycle group retreat.
The onset of solar dimming and brightening: the role of internal variability
Published:
I gave a talk at IUGG 2023, where I investigate how the onset year of the strongest trend in surface solar radiation in a historical all-forcing simulation can be impacted by internal variability.
PhD defense
Published:
I defended my PhD thesis: Decadal-scale internal variability of the shortwave flux components within Earth’s energy balance [DOI], which also includes a dataset with idealized prescribed-PDO experiments with ICON-A simulations [DOI].
Decadal-scale variability of shortwave radiation at Earth’s surface
Published:
I gave a hybrid invited talk at the Department Seminar of Physical Oceanography and Instrumentation, Leibniz-Institut für Ostseeforschung Warnemünde.
Variability of shortwave radiation at the surface and top of the atmosphere associated with the Pacific Decadal Oscillation
Published:
I gave a talk at the International Radiation Symposiym 2024.
Global Redistribution of Clouds Related to the North Pacific Horseshoe SST Pattern
Published:
I presented a poster at the AGU fall meeting 2024.
Attended the ENSO winter school
Published:
I was selected as part of the El Niño and Southern Oscillation winter shool cohort at the University of Hawaiʻi at Mānoa. During the shool, we studied different aspects of the climate phenomenon ranging from theory to forecasting and societal impacts. I had the chance to exchange ideas with current and future ENSO experts.
Pacific variability signatures in TOA radiation
Published:
I visited the NASA Langley Research Center and I gave a talk at the 42nd CERES-II Science Team meeting.
More on variability: Decadal variability of clouds and the PDO
Published:
I visited the Massachusetts Institute of Technology and gave a talk at their ESAC Early Career Seminar.
teaching
Integrated Practical: Python in Geosciences
Master's course, D-USYS, ETH Zürich
Teaching Assistant FS 2023
A practical designed to familiarize geoscientists with Python, setting up Python on different machines and working in different environments.
Radiation and Climate Change
Master's course, D-USYS, ETH Zürich
Teaching Assistant FS 2022, FS 2023
The course describes the climate change problem through Earth’s radiative balance.
Numerical Modelling of Weather and climate
Master's course, D-USYS, ETH Zürich
Teaching Assistant FS 2021, FS 2022
The course introduced the principles behind weather and climate modelling. The exercise part developed a 2-dimensional dynamical model from scratch, which involved discretizing and implementing the governing equations.
Numerical Methods in Environmental Physics
Bachelor's course, D-USYS, ETH Zürich
Teaching Assistant HS 2020, HS 2021, HS 2023
The course introduced different numerical methods to solve physics problems.