Assessing the role of compound drought and heatwave events on unprecedented 2020 wildfires in the Pantanal
Bibliographic Data
The year 2020 had the most catastrophic fire season over the last two decades in the Pantanal, which led to outstanding environmental impacts. Indeed, much of the Pantanal has been affected by severe dry conditions since 2019, with evidence of the 2020’s drought being the most extreme and widespread ever recorded in the last 70 years. Although it is unquestionable that this mega-drought contributed significantly to the increase of fire risk, so far, the 2020’s fire season has been analyzed at the univariate level of a single climate event, not considering the co-occurrence of extreme and persistent temperatures with soil dryness conditions. Here, we show that similarly to other areas of the globe, the influence of land-atmosphere feedbacks contributed decisively to the simultaneous occurrence of dry and hot spells (HPs), exacerbating fire risk. The ideal synoptic conditions for strong atmospheric heating and large evaporation rates were present, in particular during the HPs, when the maximum temperature was, on average, 6 °C above the normal. The short span of the period during those compound drought-heatwave (CDHW) events accounted for 55% of the burned area of 2020. The vulnerability in the northern forested areas was higher than in the other areas, revealing a synergistic effect between fuel availability and weather-hydrological conditions. Accordingly, where fuel is not a limiting factor, fire activity tends to be more modelled by CDHW events. Our work advances beyond an isolated event-level basis towards a compound and cascading natural hazards approach, simultaneously estimating the contribution of drought and heatwaves to fuelling extreme fire outbreaks in the Pantanal such as those in 2020. Thus, these findings are relevant within a broader context, as the driving mechanisms apply across other ecosystems, implying higher flammability conditions and further efforts for monitoring and predicting such extreme events
Biology · Climate change · Climatology · Dryness · Flood myth · Geography · Limiting · Physical geography · Climate variability and models · Environmental Science · Fire effects on ecosystems · Flood Risk Assessment and Management · Ecology · Geology
Increased population exposure to extreme droughts in Iberia due to 0.5 °C additional anthropogenic warming
Drought, heatwave, and fires
Risk inclusion of vulnerable people during a climate-related disaster
River channel avulsion in the Taquari River megafan of the Brazilian Pantanal
Ecology of Byrsonima cydoniifolia A. Juss. (Malpighiaceae) monodominant stands under the influence of flood, fire, and cattle
Anthropogenic heat amplification in industrial zones
Catastrophic wildfires in the Pantanal wetlands as catalysts for transformative change
Joining forces to fight wildfires
Mato Grosso’s rainy season
Unraveling divergences
Typicality of the 2021 Western North America summer heatwave
Elucidating diverse population exposure to compound drought and heatwave events from two meteorological drought indices (SPI and SPEI)
Mega-heatwave temperatures due to combined soil desiccation and atmospheric heat accumulation
GLEAM v3
Reconstructing Three Decades of Land Use and Land Cover Changes in Brazilian Biomes with Landsat Archive and Earth Engine
The ERA5 global reanalysis
The 2019/2020 mega-fires exposed Australian ecosystems to an unprecedented extent of high-severity fire
Vegetation, rainfall, and pulsing hydrology in the Pantanal, the world’s largest tropical wetland
Do climate teleconnections modulate wildfire-prone conditions over the Iberian Peninsula
Recent increasing frequency of compound summer drought and heatwaves in Southeast Brazil
Rethinking resilience to wildfire
Fire in Paradise
| Unique citing works | 12 |
|---|---|
| Citations per year | 3 |
| Citation span | 2022 - 2026 (5) |
| Citation velocity | current |
| Highly cited | No |
| Citation types | Neutral: 12 |