--- title: "\"Fire\" clouds and acid rain: How military operations are reshaping weather processes in Ukraine" description: "Specialists from the Zaporizhzhia Regional Hydrometeorological Center described how military operations in Ukraine are forming pyrocumulonimbus clouds, shifting the radiation balance via soot deposition, and increasing the probability of acid rain, structurally altering the local microclimate." date: 2026-11-01T07:30:11.815Z lang: en url: https://xab.info/en/posts/war-weather-processes-ukraine-acid-rain-fire-clouds tags: [ukraine-war, environment, meteorology, acid-rain, pyrocumulonimbus, black-carbon, air-pollution, microclimate] author: "Alexander Buran" publisher: "XAB.info" --- # "Fire" clouds and acid rain: How military operations are reshaping weather processes in Ukraine ![A small lonely green sprout pushes through charred dark soil in the rain against a background of a gray cloudy sky and a city silhouette.](https://xab.info/media/2026/11/01/voyna-meteoprotsessy-ukraina-kislotnye-dozhdi-ognennye-oblaka/voyna-meteoprotsessy-ukraina-kislotnye-dozhdi-ognennye-oblaka-1.webp) ## Key Points - Military operations form a unique complex of atmospheric emissions not reducible to standard industrial pollution models - Large-scale fires from shelling generate pyrocumulonimbus clouds — custom weather systems with lightning activity - Deposition of black carbon onto snow reduces albedo and causes anomalous local heating of the surface layer - Sulfur and nitrogen oxides from explosions and oil combustion increase the probability of acid rain suppressing surviving vegetation - Destruction of shelterbelts and buildings transforms the wind regime and intensifies wind erosion Military operations in Ukraine have gone far beyond the direct destruction of infrastructure and human lives. According to specialists from the Zaporizhzhia Regional Center for Hydrometeorology, cited by RBC-Ukraine, the conflict is generating a specific complex of atmospheric emissions that differs cardinally from "classic" urban or industrial pollution. This is not merely about a local deterioration in air quality, but a long-term transformation of the local microclimate — ranging from changes in the radiation balance to the emergence of custom weather systems spawned by combat fires. ### A complex of emissions unparalleled in peacetime industry Hydrometeorological center experts identify several key sources of toxic impact. Large-scale fires resulting from shelling of fuel depots, industrial enterprises, and chemical warehouses trigger prolonged burning that poisons the atmosphere for days and weeks. The destruction of buildings and infrastructure releases tons of dust containing heavy metals, asbestos, and other harmful compounds. The detonations of missiles, shells, and mines add toxic pollutants to the air, while the destruction of forests — by any available means — deprives the territory of a natural filter and humidity regulator. Combined, these factors create a multi-component mixture that cannot be extrapolated onto standard industrial pollution models. ### Pyroconvection: When fires give birth to their own storms One of the most spectacular consequences recorded by hydrometeorological centers is the effect of pyroconvection, or pyrocumulonimbus. Large-scale fires caused by bombardments generate such powerful upward thermal currents that they form their own weather systems — so-called "fire clouds." By nature, they are analogous to the cumulonimbus clouds accompanying storm fronts; however, their "fuel" is not moisture evaporation, but intense air heating from the flame. Such formations can reach heights of dozens of kilometers, carry their own lightning activity, and spread combustion products hundreds of kilometers from the epicenter of the fire. ### Black carbon and radiation balance disruption Another less visible, yet no less significant consequence is the alteration of the surface layer radiation balance. The deposition of black carbon (soot) from fires onto surrounding areas, especially snow cover in winter, sharply reduces surface albedo. Instead of reflecting solar radiation, the soiled soil or snow begins to absorb it to a much greater degree. The hydrometeorological center emphasizes that this triggers anomalous local heating of the surface air layer, disrupting customary seasonal snowmelt cycles and spring soil warming. In the long term, such a mechanism can shift phenological timings in the affected regions. ### Wind regime and acid rain: Hidden threats to surviving vegetation The felling of shelterbelts and destruction of urban development alter the aerodynamic profile of the landscape, which, according to specialists, transforms the local wind regime. The loss of natural and artificial barriers leads to the redistribution of airflows, increased wind erosion, and altered pollutant transport regimes. No less dangerous is the increased probability of acid rain formation: sulfur and nitrogen oxides entering the atmosphere from oil product combustion and explosions react with atmospheric moisture, lowering precipitation pH. The hydrometeorological center points out that this locally alters the chemical composition of fogs and rains, suppressing surviving vegetation and degrading soil cover quality in areas where ecosystem recovery is still possible. ### Context: Environmental damage as a factor in long-term planning Specialists from the Zaporizhzhia Regional Center for Hydrometeorology emphasize that the described processes are not one-off episodes. They form a self-reinforcing chain: atmospheric pollution alters precipitation regimes, precipitation changes affect soil and vegetation cover, and vegetation degradation, in turn, reduces the landscape's ability to absorb emissions and regulate the microclimate. For regions where combat operations have continued for several years, this is no longer about temporary worsening conditions, but a structural overhaul of the local climatic system. Assessing the completeness of these changes and the timelines for possible recovery, according to experts, will require years of observations and interdisciplinary research. ## Fact-Check & Sources - [Кислотные дожди и "огненные" облака: как война влияет на метеопроцессы в Украине](https://www.rbc.ua/ukr/news/kislotni-doshchi-y-vognyani-hmari-k-viyna-1792511726.html) - Primary source: RBC-Ukraine article referencing the Zaporizhzhia Regional Center for Hydrometeorology. All statements regarding pyroconvection, radiation balance, wind regimes, and acid rain are cited within the source text. ## FAQ ### What is a pyrocumulonimbus and how is it related to military operations? A pyrocumulonimbus is a 'fire cloud' formed by powerful upward thermal currents from large-scale fires. In the context of military operations, such fires occur during the shelling of fuel depots, industrial sites, and chemical warehouses. The cloud is structurally similar to a thunderstorm, but its energy comes from flame rather than moisture evaporation. ### How does soot deposition affect the local climate? Black carbon (soot) settling on the ground and especially on snow cover reduces surface albedo. Instead of reflecting solar radiation, the soiled surface absorbs it, leading to anomalous local heating of the surface air layer and a shift in seasonal cycles. ### Why do military operations increase the likelihood of acid rain? The combustion of petroleum products and detonation of ammunition release sulfur and nitrogen oxides into the atmosphere. Reacting with atmospheric moisture, they lower precipitation pH, which chemically alters the composition of fogs and rains and suppresses surviving vegetation. ### What source confirms this data? The data was provided by specialists from the Zaporizhzhia Regional Center for Hydrometeorology and published by RBC-Ukraine.