Particulate matter
Saharan dust days worsen coarse-PM mortality
Open access · cc by · source: Europe PMC
In Rome 2001–2004, coarse PM raised death risk most on Saharan dust days; fine PM effects were not modified by dust.
Study at a glance
- Design
- Other — Rome daily time-series of mortality vs PM fractions with Saharan dust-day indicator
- N
- N=80423 · 80,423 residents ≥35 who died of natural causes in Rome, 2001–2004; dust on 264 days (18.6%)
- Population
- Natural-cause deaths among Rome residents aged ≥35
- Outcome
- Daily mortality associated with fine and coarse PM on Saharan dust vs dust-free days
Structured fields used in claim comparison tables when every cited study has a complete layer.
Key findings
Dust affected 18.6% of days (264 days). Coarse PM IQR increases raised natural mortality 2.96% and respiratory mortality 12.65%. Cardiac effects of coarse PM were much stronger on dust days (9.73%) than dust-free days (0.86%). Fine PM showed no dust interaction.
Methodology
Daily mortality was linked to PM2.5, PM2.5–10, and PM10, with a LIDAR/model dust-day indicator and a PM10:NO2 > 0.6 criterion to mark Saharan advection.
Limitations
Coarse PM is a difference of two monitors so measurement error is larger; dust chemistry and bioaerosols were not speciated, so toxicity mechanisms remain inferred.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
Saharan advection was marked on 18.6% of days (264 days) using LIDAR/model plus a PM₁₀:NO₂ > 0.6 criterion. Coarse-PM IQR increases raised natural mortality 2.96% and respiratory mortality 12.65%. Cardiac effects of coarse PM were much stronger on dust days (9.73%) than dust-free days (0.86%). Fine PM showed no dust interaction. Coarse PM is a difference of two monitors, so measurement error is larger.
Evidence for the claim as stated.
Assigned 'PM₂.₅' does not predict one health number. North Carolina fused surfaces give a 3.1 g birth-weight decrement per IQR beside a 187.5 g racial gap; Rome's tiny panel finds COPD sensitive to PM₂.₅/metals but asthmatics to NO₂; Canadian MI visits at mean 6.91 μg/m³ are modified by glutathione oxidative potential, not ascorbate OP. Dust days change coarse-PM cardiac effects (9.73% vs 0.86%) with no fine-PM interaction. Mass from a monitor is not a portable toxicity.
Evidence for the claim as stated.
The DOC trend paper uses the same broad idea — long monitoring records — on a different target. Sulfate decline explains most early ΔDOC; later precipitation dominates. That is air-chemistry recovery written into water, not a daily mortality or birth-weight coefficient, and site networks are biased toward well-monitored northern lakes and streams.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
Assigned 'PM₂.₅' does not predict one health number. North Carolina fused surfaces give a 3.1 g birth-weight decrement per IQR beside a 187.5 g racial gap; Rome's tiny panel finds COPD sensitive to PM₂.₅/metals but asthmatics to NO₂; Canadian MI visits at mean 6.91 μg/m³ are modified by glutathione oxidative potential, not ascorbate OP. Dust days change coarse-PM cardiac effects (9.73% vs 0.86%) with no fine-PM interaction. Mass from a monitor is not a portable toxicity.
The DOC trend paper uses the same broad idea — long monitoring records — on a different target. Sulfate decline explains most early ΔDOC; later precipitation dominates. That is air-chemistry recovery written into water, not a daily mortality or birth-weight coefficient, and site networks are biased toward well-monitored northern lakes and streams.
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Same topic cluster — not a recommendation engine.