Substantial convection and precipitation enhancements by ultrafine aerosol particles

Jiwen Fan; Daniel Rosenfeld; Yuwei Zhang; Scott E. Giangrande; Zhanqing Li; Luiz A.T. Machado; Scot T. Martin; Yan Yang; Jian Wang; Paulo Artaxo; Henrique M.J. Barbosa; Ramon C. Braga; Jennifer M. Comstock; Zhe Feng; Wenhua Gao; Helber B. Gomes; Fan Mei; Christopher Pöhlker; Mira L. Pöhlker; Ulrich Pöschl; Rodrigo A.F. De Souza

doi:10.1126/science.aan8461

Substantial convection and precipitation enhancements by ultrafine aerosol particles

Jiwen Fan^*, Daniel Rosenfeld, Yuwei Zhang, Scott E. Giangrande, Zhanqing Li, Luiz A.T. Machado, Scot T. Martin, Yan Yang, Jian Wang, Paulo Artaxo, Henrique M.J. Barbosa, Ramon C. Braga, Jennifer M. Comstock, Zhe Feng, Wenhua Gao, Helber B. Gomes, Fan Mei, Christopher Pöhlker, Mira L. Pöhlker, Ulrich PöschlRodrigo A.F. De Souza

^*Corresponding author for this work

Fredy & Nadine Herrmann Institute of Earth Sciences

Research output: Contribution to journal › Article › peer-review

333 Scopus citations

Abstract

Aerosol-cloud interactions remain the largest uncertainty in climate projections. Ultrafine aerosol particles smaller than 50 nanometers (UAP<₅₀) can be abundant in the troposphere but are conventionally considered too small to affect cloud formation. Observational evidence and numerical simulations of deep convective clouds (DCCs) over the Amazon show that DCCs forming in a low-aerosol environment can develop very large vapor supersaturation because fast droplet coalescence reduces integrated droplet surface area and subsequent condensation. UAP<₅₀ from pollution plumes that are ingested into such clouds can be activated to form additional cloud droplets on which excess supersaturation condenses and forms additional cloud water and latent heating, thus intensifying convective strength. This mechanism suggests a strong anthropogenic invigoration of DCCs in previously pristine regions of the world.

Original language	English
Pages (from-to)	411-418
Number of pages	8
Journal	Science
Volume	359
Issue number	6374
DOIs	https://doi.org/10.1126/science.aan8461
State	Published - 26 Jan 2018

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© 2017 The Authors.

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Fan, J., Rosenfeld, D., Zhang, Y., Giangrande, S. E., Li, Z., Machado, L. A. T., Martin, S. T., Yang, Y., Wang, J., Artaxo, P., Barbosa, H. M. J., Braga, R. C., Comstock, J. M., Feng, Z., Gao, W., Gomes, H. B., Mei, F., Pöhlker, C., Pöhlker, M. L., ... De Souza, R. A. F. (2018). Substantial convection and precipitation enhancements by ultrafine aerosol particles. Science, 359(6374), 411-418. https://doi.org/10.1126/science.aan8461

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title = "Substantial convection and precipitation enhancements by ultrafine aerosol particles",

abstract = "Aerosol-cloud interactions remain the largest uncertainty in climate projections. Ultrafine aerosol particles smaller than 50 nanometers (UAP<50) can be abundant in the troposphere but are conventionally considered too small to affect cloud formation. Observational evidence and numerical simulations of deep convective clouds (DCCs) over the Amazon show that DCCs forming in a low-aerosol environment can develop very large vapor supersaturation because fast droplet coalescence reduces integrated droplet surface area and subsequent condensation. UAP<50 from pollution plumes that are ingested into such clouds can be activated to form additional cloud droplets on which excess supersaturation condenses and forms additional cloud water and latent heating, thus intensifying convective strength. This mechanism suggests a strong anthropogenic invigoration of DCCs in previously pristine regions of the world.",

author = "Jiwen Fan and Daniel Rosenfeld and Yuwei Zhang and Giangrande, {Scott E.} and Zhanqing Li and Machado, {Luiz A.T.} and Martin, {Scot T.} and Yan Yang and Jian Wang and Paulo Artaxo and Barbosa, {Henrique M.J.} and Braga, {Ramon C.} and Comstock, {Jennifer M.} and Zhe Feng and Wenhua Gao and Gomes, {Helber B.} and Fan Mei and Christopher P{\"o}hlker and P{\"o}hlker, {Mira L.} and Ulrich P{\"o}schl and {De Souza}, {Rodrigo A.F.}",

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year = "2018",

month = jan,

day = "26",

doi = "10.1126/science.aan8461",

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Fan, J, Rosenfeld, D, Zhang, Y, Giangrande, SE, Li, Z, Machado, LAT, Martin, ST, Yang, Y, Wang, J, Artaxo, P, Barbosa, HMJ, Braga, RC, Comstock, JM, Feng, Z, Gao, W, Gomes, HB, Mei, F, Pöhlker, C, Pöhlker, ML, Pöschl, U & De Souza, RAF 2018, 'Substantial convection and precipitation enhancements by ultrafine aerosol particles', Science, vol. 359, no. 6374, pp. 411-418. https://doi.org/10.1126/science.aan8461

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T1 - Substantial convection and precipitation enhancements by ultrafine aerosol particles

AU - Fan, Jiwen

AU - Rosenfeld, Daniel

AU - Zhang, Yuwei

AU - Giangrande, Scott E.

AU - Li, Zhanqing

AU - Machado, Luiz A.T.

AU - Martin, Scot T.

AU - Yang, Yan

AU - Wang, Jian

AU - Artaxo, Paulo

AU - Barbosa, Henrique M.J.

AU - Braga, Ramon C.

AU - Comstock, Jennifer M.

AU - Feng, Zhe

AU - Gao, Wenhua

AU - Gomes, Helber B.

AU - Mei, Fan

AU - Pöhlker, Christopher

AU - Pöhlker, Mira L.

AU - Pöschl, Ulrich

AU - De Souza, Rodrigo A.F.

PY - 2018/1/26

Y1 - 2018/1/26

N2 - Aerosol-cloud interactions remain the largest uncertainty in climate projections. Ultrafine aerosol particles smaller than 50 nanometers (UAP<50) can be abundant in the troposphere but are conventionally considered too small to affect cloud formation. Observational evidence and numerical simulations of deep convective clouds (DCCs) over the Amazon show that DCCs forming in a low-aerosol environment can develop very large vapor supersaturation because fast droplet coalescence reduces integrated droplet surface area and subsequent condensation. UAP<50 from pollution plumes that are ingested into such clouds can be activated to form additional cloud droplets on which excess supersaturation condenses and forms additional cloud water and latent heating, thus intensifying convective strength. This mechanism suggests a strong anthropogenic invigoration of DCCs in previously pristine regions of the world.

AB - Aerosol-cloud interactions remain the largest uncertainty in climate projections. Ultrafine aerosol particles smaller than 50 nanometers (UAP<50) can be abundant in the troposphere but are conventionally considered too small to affect cloud formation. Observational evidence and numerical simulations of deep convective clouds (DCCs) over the Amazon show that DCCs forming in a low-aerosol environment can develop very large vapor supersaturation because fast droplet coalescence reduces integrated droplet surface area and subsequent condensation. UAP<50 from pollution plumes that are ingested into such clouds can be activated to form additional cloud droplets on which excess supersaturation condenses and forms additional cloud water and latent heating, thus intensifying convective strength. This mechanism suggests a strong anthropogenic invigoration of DCCs in previously pristine regions of the world.

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VL - 359

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ER -

Substantial convection and precipitation enhancements by ultrafine aerosol particles

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