Indirect contributions of global fires to surface ozone through ozone-vegetation feedback

Lei, Yadong; Yue, Xu; Liu, Hong; Zhang, Lin; Yang, Yang; Zhang, Hao; Tian, Chenguang; Chen, Gong; Ma, Yimian; Dunstan, David W.; Cao, Yang

doi:10.5194/acp-2020-1264

Cited by 1 publication

(1 citation statement)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A 2021 study using both GFED and FINN, version 1.5, showed similar spatial pattern and seasonality of fire-induced PM 2•5 in the Amazon region, although the magnitude using GFED is slightly lower than that with FINN. 44 In conclusion, exposure to wildfire-related PM 2•5 was associated with an increased risk of all-cause, respiratory, and cardiovascular hospital admissions in Brazil. Children aged 0-9 years and adults aged 80 years and older were more susceptible to wildfire-related PM 2•5 than other age groups.…”

Section: Discussionmentioning

confidence: 82%

Risk and burden of hospital admissions associated with wildfire-related PM2·5 in Brazil, 2000–15: a nationwide time-series study

Lee

Chen

et al. 2021

The Lancet Planetary Health

Self Cite

View full text Add to dashboard Cite

Background In the context of climate change and deforestation, Brazil is facing more frequent and unprecedented wildfires. Wildfire-related PM 2•5 is associated with multiple adverse health outcomes; however, the magnitude of these associations in the Brazilian context is unclear. We aimed to estimate the association between daily exposure to wildfire-related PM 2•5 and cause-specific hospital admission and attributable health burden in the Brazilian population using a nationwide dataset from 2000 to 2015.Methods In this nationwide time-series analysis, data for daily all-cause, cardiovascular, and respiratory hospital admissions were collected through the Brazilian Unified Health System from 1814 municipalities in Brazil between Jan 1, 2000, and Dec 31, 2015. Daily concentrations of wildfire-related PM 2•5 were estimated using the 3D chemical transport model GEOS-Chem at a 2•0° latitude by 2•5° longitude resolution. A time-series analysis was fitted using quasi-Poisson regression to quantify municipality-specific effect estimates, which were then pooled at the regional and national levels using random-effects meta-analyses. Analyses were stratified by sex and ten age groups. The attributable fraction and attributable cases of hospital admissions due to wildfire-related PM 2•5 were also calculated. FindingsAt the national level, a 10 μg/m³ increase in wildfire-related PM 2•5 was associated with a 1•65% (95% CI 1•51-1•80) increase in all-cause hospital admissions, a 5•09% (4•73-5•44) increase in respiratory hospital admissions, and a 1•10% (0•78-1•42) increase in cardiovascular hospital admissions, over 0-1 days after the exposure. The effect estimates for all-cause hospital admission did not vary by sex, but were particularly high in children aged 4 years or younger (4•88% [95% CI 4•47-5•28]), children aged 5-9 years (2•33% [1•77-2•90]), and people aged 80 years and older (3•70% [3•20-4•20]) compared with other age groups. We estimated that 0•53% (95% CI 0•48-0•58) of allcause hospital admissions were attributable to wildfire-related PM 2•5 , corresponding to 35 cases (95% CI 32-38) per 100 000 residents annually. The attributable rate was greatest for municipalities in the north, south, and centralwest regions, and lowest in the northeast region. Results were consistent for all-cause and respiratory diseases across regions, but remained inconsistent for cardiovascular diseases.Interpretation Short-term exposure to wildfire-related PM 2•5 was associated with increased risks of all-cause, respiratory, and cardiovascular hospital admissions, particularly among children (0-9 years) and older people (≥80 years). Greater attention should be paid to reducing exposure to wildfire smoke, particularly for the most susceptible populations.

show abstract

Section: Discussionmentioning

confidence: 82%