EGU25-15708, updated on 15 Mar 2025
https://doi.org/10.5194/egusphere-egu25-15708
EGU General Assembly 2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Poster | Wednesday, 30 Apr, 14:00–15:45 (CEST), Display time Wednesday, 30 Apr, 08:30–18:00
 
vPoster spot 5, vP5.16
"Investigating Regional and Long-Range Transport Contributions to GHG Concentrations of a Mid-Latitude Urban Site" 
Thomas Panou1, Marios Mermigkas2, Chrysanthi Topaloglou1, Dimitrios Balis1, Darko Dubravica3, and Frank Hase3
Thomas Panou et al.
  • 1Laboratory of Atmospheric Physics, Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece (tpanou@physics.auth.gr)
  • 2Institute for Astronomy, Astrophysics, Space Applications and Remote Sensing, National Observatory of Athens, Penteli, Greece (mmermigk@physics.auth.gr)
  • 3Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research (IMK-ASF), Karlsruhe, Germany (frank.hase@kit.edu )

Increasing concentrations of greenhouse gases (GHGs) in the atmosphere are the primary driver of the observed rise in global surface temperatures, meanwhile exceeding 1°C above pre-industrial levels. Addressing this challenge requires linking GHG concentrations to specific anthropogenic and natural sources as part of the global carbon budget. This study investigates the relationship between GHG concentrations measured in Thessaloniki, Greece, and potential long-range transport sources using a clustering approach.

The GHG data were obtained from the EM27/SUN Fourier Transform Infrared (FTIR) spectrometer, a ground-based low-resolution infrared spectrometer operated in the framework of the Collaborative Carbon Column Observing Network (COCCON) at a mid-latitude urban site. The instrument provides column-averaged dry air molar fractions of CH₄, CO₂, CO, and H₂O. Meteorological data for trajectory simulations were derived from the Global Data Assimilation System (GDAS) with a spatial resolution of 1° × 1°.

Clustering analysis was performed using the Hybrid Single Particle Lagrangian Integrated Trajectory (HYSPLIT) model. Seven-day kinematic back trajectories were calculated for the period 2019–2024 at two arrival heights, 1500 m and 3000 m above mean sea level. The findings aim to specify the influence of long-range transport on GHG concentrations over Thessaloniki, contributing to a more complete understanding of regional GHG source-receptor relationships and transport patterns.

How to cite: Panou, T., Mermigkas, M., Topaloglou, C., Balis, D., Dubravica, D., and Hase, F.: "Investigating Regional and Long-Range Transport Contributions to GHG Concentrations of a Mid-Latitude Urban Site" , EGU General Assembly 2025, Vienna, Austria, 27 Apr–2 May 2025, EGU25-15708, https://doi.org/10.5194/egusphere-egu25-15708, 2025.