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  • Acosta Navarro, Juan C.Stockholms universitet,Institutionen för miljövetenskap och analytisk kemi (author)

Future response of temperature and precipitation to reduced aerosol emissions as compared with increased greenhouse gas concentrations

  • Article/chapterEnglish2017

Publisher, publication year, extent ...

  • 2017
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-137076
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-137076URI
  • https://doi.org/10.1175/JCLI-D-16-0466.1DOI

Supplementary language notes

  • Language:English
  • Summary in:English

Part of subdatabase

Classification

  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • Experiments with a climate model (NorESM1) were performed to isolate the effects of aerosol particles and greenhouse gases on surface temperature and precipitation in simulations of future climate. The simulations show that by 2025-2049, a reduction of aerosol emissions from fossil fuels following a maximum technically feasible reduction (MFR) scenario could lead to a global and Arctic warming of 0.26 K and 0.84 K, respectively; as compared with a simulation with fixed aerosol emissions at the level of 2005. If fossil fuel emissions of aerosols follow a current legislation emissions (CLE) scenario, the NorESM1 model simulations yield a non-significant change in global and Arctic average surface temperature as compared with aerosol emissions fixed at year 2005. The corresponding greenhouse gas effect following the RCP4.5 emission scenario leads to a global and Arctic warming of 0.35 K and 0.94 K, respectively.The model yields a marked annual average northward shift in the inter-tropical convergence zone with decreasing aerosol emissions and subsequent warming of the northern hemisphere. The shift is most pronounced in the MFR scenario but also visible in the CLE scenario. The modeled temperature response to a change in greenhouse gas concentrations is relatively symmetric between the hemispheres and there is no marked shift in the annual average position of the inter-tropical convergence zone. The strong reduction in aerosol emissions in MFR also leads to a net southward cross-hemispheric energy transport anomaly both in the atmosphere and ocean, and enhanced monsoon circulation in Southeast and East Asia causing an increase in precipitation over a large part of this region.

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Ekman, Annica M. L.Stockholms universitet,Meteorologiska institutionen (MISU) (author)
  • Pausata, Francesco S. R.Stockholms universitet,Meteorologiska institutionen (MISU)(Swepub:su)fpaus (author)
  • Lewinschal, AnnaStockholms universitet,Meteorologiska institutionen (MISU)(Swepub:su)anle6285 (author)
  • Varma, Vidya (author)
  • Seland, Øyvind (author)
  • Gauss, Michael (author)
  • Iversen, Trond (author)
  • Kirkevåg, Alf (author)
  • Riipinen, IlonaStockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)iriip (author)
  • Hansson, Hans ChristenStockholms universitet,Institutionen för miljövetenskap och analytisk kemi(Swepub:su)hhans (author)
  • Stockholms universitetInstitutionen för miljövetenskap och analytisk kemi (creator_code:org_t)

Related titles

  • In:Journal of Climate30:3, s. 939-9540894-87551520-0442

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