dc.contributor.author | Gryspeerdt, E | |
dc.contributor.author | Quaas, J | |
dc.contributor.author | Ferrachat, S | |
dc.contributor.author | Gettelman, A | |
dc.contributor.author | Ghan, S | |
dc.contributor.author | Lohmann, U | |
dc.contributor.author | Morrison, H | |
dc.contributor.author | Neubauer, D | |
dc.contributor.author | Partridge, DG | |
dc.contributor.author | Stier, P | |
dc.contributor.author | Takemura, T | |
dc.contributor.author | Wang, H | |
dc.contributor.author | Wang, M | |
dc.contributor.author | Zhang, K | |
dc.date.accessioned | 2018-11-07T14:33:55Z | |
dc.date.issued | 2017-04-26 | |
dc.description.abstract | Much of the uncertainty in estimates of the anthropogenic forcing of climate change comes from uncertainties in the instantaneous effect of aerosols on cloud albedo, known as the Twomey effect or the radiative forcing from aerosol-cloud interactions (RFaci), a component of the total or effective radiative forcing. Because aerosols serving as cloud condensation nuclei can have a strong influence on the cloud droplet number concentration (Nd), previous studies have used the sensitivity of theNdto aerosol properties as a constraint on the strength of the RFaci. However, recent studies have suggested that relationships between aerosol and cloud properties in the present-day climate may not be suitable for determining the sensitivity of theNdto anthropogenic aerosol perturbations. Using an ensemble of global aerosol-climate models, this study demonstrates how joint histograms betweenNdand aerosol properties can account for many of the issues raised by previous studies. It shows that if the anthropogenic contribution to the aerosol is known, the RFaci can be diagnosed to within 20% of its actual value. The accuracy of different aerosol proxies for diagnosing the RFaci is investigated, confirming that using the aerosol optical depth significantly underestimates the strength of the aerosol-cloud interactions in satellite data. | en_GB |
dc.description.sponsorship | This work was supported by the European Research Council (ERC) under the European Union’s Seventh Framework Program (FP7/2007–2013)/ERC Grants FP7-306284 (“QUAERERE”), FP7-280025 (“ACCLAIM”), and FP7-603445 (“BACCHUS”); Natural Environment Research Council Grant NE/I020148/1; Austrian Science Fund J 3402-N29 (Erwin Schrödinger Fellowship Abroad); Environment Research and Technology Development Fund S-12-3 of the Ministry of the Environment, Japan; Japan Society for the Promotion of Science KAKENHI Grants JP15H01728 and JP15K12190; National Natural Science Foundation of China Grants 41575073 and 41621005; Swiss National Supercomputing Center Project s431; and the supercomputer system of the National Institute for Environmental Studies, Japan. | en_GB |
dc.identifier.citation | Vol. 114 (19), pp. 4899 - 4904 | en_GB |
dc.identifier.doi | 10.1073/pnas.1617765114 | |
dc.identifier.uri | http://hdl.handle.net/10871/34669 | |
dc.language.iso | en | en_GB |
dc.publisher | National Academy of Sciences | en_GB |
dc.relation.url | https://www.ncbi.nlm.nih.gov/pubmed/28446614 | en_GB |
dc.rights | © 2017 The Author(s) | en_GB |
dc.subject | aerosols | en_GB |
dc.subject | clouds | en_GB |
dc.subject | radiative forcing | en_GB |
dc.title | Constraining the instantaneous aerosol influence on cloud albedo | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2018-11-07T14:33:55Z | |
exeter.place-of-publication | United States | en_GB |
dc.description | This is the author accepted manuscript. The final version is available from National Academy of Sciences via the DOI in this record | en_GB |
dc.description | Data deposition: The model history is available in the AeroCom archive at aerocom.met.no/data.html. | en_GB |
dc.description | This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1617765114/-/DCSupplemental | en_GB |
dc.identifier.journal | Proceedings of the National Academy of Sciences | en_GB |