Cause of gas odor in Attica remains unknown - Scenarios being examined

A pervasive and unpleasant odor, described as being similar to gas, has caused significant unease among residents in various parts of Attica, Greece. The mysterious smell, which permeated the atmosphere on Tuesday, has left authorities and experts scrambling to identify its origin. The lack of immediate identification has fueled public concern and prompted investigations into a range of potential sources, highlighting the region's vulnerability to environmental factors.

Chemistry professor Michalis Chalari pointed to a perceived lack of swift action from relevant authorities, including the Ministry of Environment and Energy and the Attica Regional administration. He stressed the importance of immediate air quality measurements and analyses to determine the nature and source of the odor. While ruling out a natural gas or LPG leak, Chalari suggested that the smell could be linked to phytoplankton in the Saronic Gulf, potentially exacerbated by climate change. This hypothesis underscores the complex interplay between environmental conditions and public well-being in the region.

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If the mechanism had been fully activated, measurements and analyses would have been done. Since there is, let me put it this way, a threatening phenomenon, we don't know the origin, we don't know anything. There was just a strong smell.

Meteorologist Thodoris Kolydas is also examining the phenomenon, using trajectory analysis to trace the air masses that carried the odor. Preliminary findings suggest a marine or coastal origin, consistent with Chalari's hypothesis. However, definitive conclusions require on-site chemical measurements. The response from civil protection, which involved evacuating schools and other facilities without a confirmed cause, has been deemed potentially ineffective by some experts, who note that in cases of chemical agent dispersion, sheltering in place is often recommended over evacuation. This situation in Attica underscores the challenges faced by authorities in responding to environmental incidents where the cause is not immediately apparent, especially in a densely populated area heavily influenced by its coastal environment and climate patterns.

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The preliminary analysis with back-trajectories #HYSPLIT shows that the air masses that reached the areas where the smell was reported had previously moved from a south-southeasterly sea or coastal sector. This element makes a marine or coastal origin meteorologically compatible, without proving the exact cause.