Publication Abstracts

Knopf et al. 2021

Knopf, D.A., K.R. Barry, T.A. Brubaker, L.G. Jahl, K.A. Jankowski, J. Li, Y. Lu, L.W. Monroe, K.A. Moore, F.A. Rivera-Adorno, K.A. Sauceda, Y. Shi, J.M. Tomlin, H.S.K. Vepuri, P. Wang, N.N. Lata, E.J.T. Levin, J.M. Creamean, T.C.J. Hill, S. China, P.A. Alpert, R.C. Moffet, N. Hiranuma, R.C. Sullivan, A.M. Fridlind, M. West, N. Riemer, A. Laskin, P.J. DeMott, and X. Liu, 2021: Aerosol ice formation closure: A Southern Great Plains field campaign. Bull. Amer. Meteorol. Soc., 102, no. 10, E1952-E1971, doi:10.1175/BAMS-D-20-0151.1.

Prediction of ice formation in clouds presents one of the grand challenges in the atmospheric sciences. Immersion freezing initiated by ice-nucleating particles (INPs) is the dominant pathway of primary ice crystal formation in mixed-phase clouds, where supercooled water droplets and ice crystals coexist, with important implications for the hydrological cycle and climate. However, derivation of INP number concentrations from an ambient aerosol population in cloud-resolving and climate models remains highly uncertain. We conducted an aerosol-ice formation closure pilot study using a field-observational approach to evaluate the predictive capability of immersion freezing INPs. The closure study relies on collocated measurements of the ambient size-resolved and single-particle composition and INP number concentrations. The acquired particle data serve as input in several immersion freezing parameterizations, which are employed in cloud-resolving and climate models, for prediction of INP number concentrations. We discuss in detail one closure case study in which a front passed through the measurement site, resulting in a change of ambient particle and INP populations. We achieved closure in some circumstances within uncertainties, but we emphasize the need for freezing parameterization of potentially missing INP types and evaluation of the choice of parameterization to be employed. Overall, this closure pilot study aims to assess the level of parameter details and measurement strategies needed to achieve aerosol-ice formation closure. The closure approach is designed to accurately guide immersion freezing schemes in models, and ultimately identify the leading causes for climate model bias in INP predictions.

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BibTeX Citation

  author={Knopf, D. A. and Barry, K. R. and Brubaker, T. A. and Jahl, L. G. and Jankowski, K. A. and Li, J. and Lu, Y. and Monroe, L. W. and Moore, K. A. and Rivera-Adorno, F. A. and Sauceda, K. A. and Shi, Y. and Tomlin, J. M. and Vepuri, H. S. K. and Wang, P. and Lata, N. N. and Levin, E. J. T. and Creamean, J. M. and Hill, T. C. J. and China, S. and Alpert, P. A. and Moffet, R. C. and Hiranuma, N. and Sullivan, R. C. and Fridlind, A. M. and West, M. and Riemer, N. and Laskin, A. and DeMott, P. J. and Liu, X.},
  title={Aerosol ice formation closure: A Southern Great Plains field campaign},
  journal={Bull. Amer. Meteorol. Soc.},

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RIS Citation

ID  - kn07200b
AU  - Knopf, D. A.
AU  - Barry, K. R.
AU  - Brubaker, T. A.
AU  - Jahl, L. G.
AU  - Jankowski, K. A.
AU  - Li, J.
AU  - Lu, Y.
AU  - Monroe, L. W.
AU  - Moore, K. A.
AU  - Rivera-Adorno, F. A.
AU  - Sauceda, K. A.
AU  - Shi, Y.
AU  - Tomlin, J. M.
AU  - Vepuri, H. S. K.
AU  - Wang, P.
AU  - Lata, N. N.
AU  - Levin, E. J. T.
AU  - Creamean, J. M.
AU  - Hill, T. C. J.
AU  - China, S.
AU  - Alpert, P. A.
AU  - Moffet, R. C.
AU  - Hiranuma, N.
AU  - Sullivan, R. C.
AU  - Fridlind, A. M.
AU  - West, M.
AU  - Riemer, N.
AU  - Laskin, A.
AU  - DeMott, P. J.
AU  - Liu, X.
PY  - 2021
TI  - Aerosol ice formation closure: A Southern Great Plains field campaign
JA  - Bull. Amer. Meteorol. Soc.
VL  - 102
IS  - 10
SP  - E1952
EP  - E1971
DO  - 10.1175/BAMS-D-20-0151.1
ER  -

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