Cristin-resultat-ID: 1855009
Sist endret: 3. mars 2021, 15:55
NVI-rapporteringsår: 2020
Resultat
Vitenskapelig artikkel
2020

How aerosols and greenhouse gases influence the diurnal temperature range

Bidragsytere:
  • Camilla Weum Stjern
  • Bjørn Hallvard Samset
  • Olivier Boucher
  • Trond Iversen
  • Jean-Francois Lamarque
  • Gunnar Myhre
  • mfl.

Tidsskrift

Atmospheric Chemistry and Physics (ACP)
ISSN 1680-7316
e-ISSN 1680-7324
NVI-nivå 2

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2020
Volum: 20
Hefte: 21
Sider: 13467 - 13480
Open Access

Importkilder

Scopus-ID: 2-s2.0-85096162926

Beskrivelse Beskrivelse

Tittel

How aerosols and greenhouse gases influence the diurnal temperature range

Sammendrag

The diurnal temperature range (DTR) (or difference between the maximum and minimum temperature within a day) is one of many climate parameters that affects health, agriculture and society. Understanding how DTR evolves under global warming is therefore crucial. Physically different drivers of climate change, such as greenhouse gases and aerosols, have distinct influences on global and regional climate. Therefore, predicting the future evolution of DTR requires knowledge of the effects of individual climate forcers, as well as of the future emissions mix, in particular in high-emission regions. Using global climate model simulations from the Precipitation Driver and Response Model Intercomparison Project (PDRMIP), we investigate how idealized changes in the atmospheric levels of a greenhouse gas (CO2) and aerosols (black carbon and sulfate) influence DTR (globally and in selected regions). We find broad geographical patterns of annual mean change that are similar between climate drivers, pointing to a generalized response to global warming which is not defined by the individual forcing agents. Seasonal and regional differences, however, are substantial, which highlights the potential importance of local background conditions and feedbacks. While differences in DTR responses among drivers are minor in Europe and North America, there are distinctly different DTR responses to aerosols and greenhouse gas perturbations over India and China, where present aerosol emissions are particularly high. BC induces substantial reductions in DTR, which we attribute to strong modeled BC-induced cloud responses in these regions.

Bidragsytere

Camilla Weum Stjern

  • Tilknyttet:
    Forfatter
    ved CICERO Senter for klimaforskning

Bjørn Hallvard Samset

  • Tilknyttet:
    Forfatter
    ved CICERO Senter for klimaforskning

Olivier Boucher

  • Tilknyttet:
    Forfatter
    ved Université Pierre et Marie Curie

Trond Iversen

  • Tilknyttet:
    Forfatter
    ved Meteorologisk institutt

Jean-Francois Lamarque

  • Tilknyttet:
    Forfatter
    ved National Center for Atmospheric Research
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