Potential Link Between Ice Nucleation and Climate Model Spread in Arctic Amplification

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dc.contributor.authorTan, Ivy
dc.contributor.authorBarahona, Donifan
dc.contributor.authorCoopman, Quentin
dc.date.accessioned2023-03-22T21:42:51Z
dc.date.available2023-03-22T21:42:51Z
dc.date.issued2022-01-31
dc.description.abstractArctic amplification (AA) is simulated by all global climate models, however the spread in the degree of projected warming is large and the underlying mechanisms driving it are poorly understood. The impact of the temperature dependence of immersion freezing on cloud feedbacks and AA is studied using NASA's GEOS-5 model. Parameterizations that exhibit low ice-nucleating particle (INP) concentrations in the high Arctic during summer are found to weaken the cloud-phase feedback. This allows sunlight to readily melt sea-ice in the summer, which decreases the stability of the lower troposphere, causing a decrease in wintertime cloud fraction over open ocean. Arctic amplification was found to span from ∼1.4 to >2.6, which spans 30% of the spread in AA in the coupled model intercomparison project models, depending on the temperature dependence of immersion freezing. These results suggest that summertime INP concentrations may provide an observational constraint on AAen_US
dc.description.sponsorshipI. Tan thanks Y. Huang at McGill University and R. Kramer at NASA Goddard Space Flight Center for helpful constructive comments on this work, and M. D. Zelinka at Lawrence Livermore national laboratory for providing CMIP data. I. Tan was supported by the National Aeronautics And Space Administration Grant 80NSSC18K1599. Computational resources supporting this work were provided by the NASA high-end comput-ing (HEC) Program through the NASA advanced supercomputing (NAS) division at Ames research center and the NASA center for climate simulation (NCCS) at Goddard space flight center.en_US
dc.description.urihttps://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2021GL097373en_US
dc.format.extent9 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m253iv-ezlo
dc.identifier.citationTan, I., Barahona, D., & Coopman, Q. (2022). Potential link between ice nucleation and climate model spread in Arctic amplification. Geophysical Research Letters, 49, e2021GL097373. https://doi.org/10.1029/2021GL097373en_US
dc.identifier.urihttps://doi.org/10.1029/2021GL097373
dc.identifier.urihttp://hdl.handle.net/11603/27023
dc.language.isoen_USen_US
dc.publisherAGUen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Joint Center for Earth Systems Technology
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titlePotential Link Between Ice Nucleation and Climate Model Spread in Arctic Amplificationen_US
dc.typeTexten_US
dcterms.creatorhttps://orcid.org/0000-0003-4203-4770en_US

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