2022 was the worst drought on record for the Great Hungarian Plain, and the only year since 1975 to exceed 10 °C per 100 mm on the PaDI drought index, the study found. Researchers calculated PaDI for 1975-2022 and flagged values above 10 °C/100 mm as a serious drought. They tied the 2022 episode to three drivers: very dry soils that reduced convective rainfall, a persistent anticyclone that blocked weather systems, and La Niña conditions. The paper also shows rising PaDI values linked to higher summer temperatures and lower rainfall, a trend that matters for farming that depends on spring and summer moisture.

The study analyzed a climate dataset called HuClim to map drought intensity across the Great Hungarian Plain from 1975 to 2022. Researchers used the PaDI index, which combines temperature and precipitation into a single measure expressed in degrees Celsius per 100 millimeters. A higher PaDI means conditions are drier for the amount of heat present.

How the index works and what the numbers mean

PaDI ties temperature and rainfall into one metric. The index is designed so that hotter, drier years produce higher values. For the 48-year period, the spatial average PaDI was 5.3 °C/100 mm, with a temporal standard deviation of 0.82 °C/100 mm. The team flagged PaDI values above 10 °C/100 mm as a category of serious drought.

Only 2022 crossed that line. The researchers said that makes 2022 the most severe drought in the record they examined. Heavy drought also appeared in three other years: 1992, 2003 and 2012. Almost half of all years in the record showed mild drought. Years without drought made up about 23 percent of the period.

What drove the 2022 event

The paper identifies a mix of local, regional and large-scale forces that coincided in 2022. At the local level, very dry soils reduced convective rainfall processes. That meant less capacity for daytime heating to generate thunderstorms that would normally deliver summer rain. At the synoptic scale, a blocking anticyclone held weather systems away from the region for extended stretches. At the largest scale, the researchers point to La Niña conditions as a contribution to the atmospheric setup that year.

Put together, these factors produced a drought more severe than anything recorded in the study window. The authors emphasize that the event was exceptional because the three elements operated together, rather than one dominant cause alone.

Trends over time: small shifts that add up

When the authors split the record into two 24-year slices, they found a rise in average PaDI. The spatial average moved from 5.1 °C/100 mm in 1975-1998 to 5.5 °C/100 mm in 1999-2022.

Mastheads

Summer temperatures in the later period were higher as well, rising from 17.4 °C to 18.7 °C on average across the study region.

Precipitation totals showed a modest change too. The annual mean went from about 540 millimeters to about 576 millimeters between the two periods. Despite that slight uptick in annual rainfall, the PaDI increase signals that temperature rises have outpaced any precipitation gains in their effect on drought stress.

The paper reports statistical links between PaDI and basic climate measures. The correlation between PaDI and summer temperature was 0.62, while the correlation with total annual precipitation was -0.73. Both correlation coefficients were statistically significant at the 0.05 level in the authors' analysis.

Implications for farming and the wider economy

The Great Hungarian Plain is an important agricultural region. Crops and pastures there depend on soil moisture through spring and summer. The study doesn't provide farm-level yield numbers. It does, however, show a measurable rise in drought pressure as defined by PaDI, and it documents repeat episodes of heavy drought in recent decades.

That pattern matters for farmers, input suppliers and local governments. More frequent or more severe droughts raise irrigation demand. They also raise the chance that farms will need emergency financial support during bad seasons. Where irrigation is limited, sustained dry conditions can cut yields and raise production costs.

At a national level, repeated drought events can shape budget priorities. Policymakers may face pressure to invest in water storage, irrigation upgrades and drought preparedness. They may also consider changes in crop choices or land management to reduce exposure to long dry spells.

European food and feed markets are sensitive to production swings in major producing regions. The study's finding that serious drought can occur when dry soils, blocking weather patterns and remote ocean-atmosphere states line up highlights how shocks can come from several sources at once. That raises the bar for early warning systems and for contingency planning across borders.

Economists and trade officials track those supply risks because they affect commodity prices, trade flows and food security in dependent markets. While this paper focuses on climate indicators rather than market data, the climate signals it documents feed into those economic assessments.

The research quantifies drought intensity using PaDI and identifies its likely atmospheric drivers in 2022. The study doesn't claim specific crop losses, company earnings effects, or national economic figures tied to any single drought year. It also doesn't make explicit policy recommendations, though it lays out the climatic evidence that decision makers can use when weighing adaptation options.

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The study found PaDI averaged 5.3 °C/100 mm for 1975-2022, with 2022 the only year above 10 °C/100 mm.

This article was created with AI assistance.