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Gregory Carmichael on Muck Rack

Gregory Carmichael

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Articles

Optimized spatial planning offers a dual solution for managing urban heat and air pollution in humid subtropical climates

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By Liuhua Zhu, Fan Wang, Chris Nielsen, Gregory Carmichael, Meng Gao
| Nature Verified
Abstract As cities expand, urban heat islands and air pollution have merged, especially in humid subtropical cities. Yet a dual solution remains lacking to simultaneously mitigate these two issues due to complex meteorology-chemistry interactions. Based on numerical simulations and a multi-objective optimization algorithm, we develop an optimized spatial planning that considers the intricate interplay between urban heat and pollution.
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Author Correction: Atmospheric warming contributions from airborne microplastics and nanoplastics

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By Yu Chi Liu, Hongbo Fu, Hongliang Zhang, Yunhang Wang, Rajan K Chakrabarty, Xiang Tu, Xu Tang, Alexander Laskin, Gregory Carmichael, Jianmin Chen, Joseph S. Francisco, Drew T. Shindell
| Nature Verified
Correction to: Nature Climate Change https://doi.org/10.1038/s41558-026-02620-1, published online 4 May 2026. In the version of this article initially published, there was a citation error in the legend to Fig. 2b, which has now been amended to cite refs. 2,12,13,20–23,35–43; a citation error in the Methods “Calculation of optical properties of MNPs” section, where in the sentence “We calculated the dielectric function from S(E) using Kramers–Kronig (KK) analysis with HyperSpy49,” ref.
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Atmospheric warming contributions from airborne microplastics and nanoplastics

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By Yu Liu, Hongbo Fu, Hongliang Zhang, Yunhang Wang, Rajan K Chakrabarty, Xiang Tu, Xu Tang, Alexander Laskin, Gregory Carmichael, Jianmin Chen, Joseph S. Francisco, Drew T. Shindell
| Nature Verified
Abstract 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.
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