We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Atmospheric warming contributions from airborne microplastics and nanoplastics
AI summary Read the abstract
Researchers modeled the direct radiative forcing of atmospheric micro- and nanoplastics using measured optical properties, finding that colored particles absorb light at 74.8 times the rate of pristine particles and produce a mean global forcing of 0.039 W/m² — equivalent to 16% of black carbon — with regional hotspots over ocean gyres where MPs can outforce black carbon by nearly fivefold.
Microplastic and nanoplastic particles (MNPs) are pervasive in the atmosphere, yet their direct radiative forcing (DRF) remains poorly constrained. Using a radiative transfer model combined with experimentally derived optical properties and simulated atmospheric distributions, we show that coloured MNPs exhibit strong light absorption, with a mean refractive index of 1.49–0.22i at 550 nm and absorption coefficients 74.8 times higher than those of pristine particles. Atmospheric ageing produces minimal net optical change, as yellowing-induced absorption in white particles is largely offset by bleaching of red ones. Modelled global surface concentrations reach 4.18 MP m−3 for microplastics and 3.67 ng m−3 for nanoplastics. Resulting simulations yield mean DRF of 0.039 ± 0.019 W m−2 for MNPs, equivalent to 16.2% of black carbon forcing. Regional DRF peaks over the North Pacific Subtropical Gyre (~1.34 W m−2), exceeded located black carbon by 4.7-fold, highlighting MNPs as previously unrecognized climate forcing agents. The radiative impact of microplastic and nanoplastic particles in the atmosphere is not well understood. Here the authors quantify their radiative forcing, finding that they can exceed that of black carbon regionally.
More Papers Like This
Direct radiative effects of airborne microplastics
AI summary Read the abstract
Researchers calculated for the first time how airborne microplastics might affect Earth's climate by absorbing and scattering sunlight, similar to dust particles. At current levels, the climate effect is small compared to other air pollutants, but plastic production has been growing rapidly for decades. As more microplastics accumulate in the atmosphere, their influence on climate could become more significant over time.
Optical Properties of Matter: from Plasmonic Nanoparticles to Airborne Microplastics
AI summary Read the abstract
Scientists studied how tiny plastic particles floating in our air interact with sunlight, and found something surprising: colored microplastics actually trap heat and contribute to warming the atmosphere, while clear plastic particles tend to have a cooling effect. This matters because microplastic pollution—already a concern for health due to how these particles get into our air, water, and bodies—may also be quietly influencing our climate depending on what color the plastic debris happens to be.
Revised direct radiative forcing of airborne microplastics suggests warming
AI summary Read the abstract
Tiny plastic particles floating in our air aren't just a concern for our lungs, new research suggests they may also be quietly warming the planet. Scientists found that these airborne microplastics trap heat in the atmosphere at a level comparable to other pollutants climate scientists already track closely, and since plastic pollution keeps increasing, this warming effect will likely grow too. The takeaway: microplastics deserve a spot in climate change models, not just health studies, since they may be affecting both our bodies and our planet's temperature.
Global climate model development to constrain the impact of airborne microplastics on climate change
AI summary Read the abstract
Researchers developed global climate model components to constrain the radiative and microphysical effects of airborne microplastics, incorporating both direct radiation interactions and indirect effects through cloud condensation nuclei and ice-nucleating particle roles, given that MPs have been detected in cloud water at high altitudes and at remote sites up to 3500 m elevation.
Airborne microplastic radiative effects: a sensitivity study
AI summary Read the abstract
Researchers performed climate model simulations with the HadGEM3-GA7.1 atmospheric model to assess the sensitivity of the direct radiative effect of airborne microplastics to updated constraints on their spatial distribution, optical properties, and particle characteristics, finding that microplastics produce a measurable but highly uncertain perturbation of the radiation budget.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.