Parametrization schemes of incident radiation in the North Water Polynya

J. M. Hanesiak, D. G. Barber, T. N. Papakyriakou, Peter J Minnett

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Surface incident radiation is a critical component of the Arctic surface energy balance making it important for sea-ice model parametrizations to properly account for these fluxes. In this article, we test the performance of various incident short-wave (K↓) and long-wave (L↓) flux parametrizations using unique observations from the 1998 International North Water (NOW) Polynya Project between March and July. The dataset includes hourly observations over terrestrial, fast-ice and full marine polynya environments allowing for parametrization comparisons between each environment and determination of any seasonal biases. Performance testing is highly dependent on observed input parameters that contain relative errors, however, significant differences between the marine and fast-ice fluxes are evident. Results are very similar between the terrestrial and fast-ice sites. The best K↓ clear-sky schemes underestimate fluxes in the colder season and overestimate them in the warm season, with greater biases in the marine setting. The K↓ cloudy-sky results suggest a similar cold and warm season bias but with greater magnitudes, especially in the marine environment. The K↓ cloudy-sky schemes require seasonal improvements, especially in the marine atmosphere. The L↓ clear-sky fluxes were generally overestimated during the colder season. Accounting for a less emissive atmosphere resulted in better flux approximations in all environments. L↓ cloudy-sky fluxes were generally underestimated. Adjusting the cloudy-sky emissivity improved the estimated fluxes, however, results were very different in the marine setting. The L↓ cloudy-sky parametrizations may require re-evaluation due to a consistent negative bias as the observed flux increases.

Original languageEnglish (US)
Pages (from-to)223-238
Number of pages16
JournalAtmosphere - Ocean
Volume39
Issue number3
StatePublished - Sep 2001

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polynya
clear sky
ice
marine atmosphere
water
surface energy
emissivity
energy balance
sea ice
marine environment
radiation
atmosphere
cold

ASJC Scopus subject areas

  • Atmospheric Science
  • Oceanography

Cite this

Hanesiak, J. M., Barber, D. G., Papakyriakou, T. N., & Minnett, P. J. (2001). Parametrization schemes of incident radiation in the North Water Polynya. Atmosphere - Ocean, 39(3), 223-238.

Parametrization schemes of incident radiation in the North Water Polynya. / Hanesiak, J. M.; Barber, D. G.; Papakyriakou, T. N.; Minnett, Peter J.

In: Atmosphere - Ocean, Vol. 39, No. 3, 09.2001, p. 223-238.

Research output: Contribution to journalArticle

Hanesiak, JM, Barber, DG, Papakyriakou, TN & Minnett, PJ 2001, 'Parametrization schemes of incident radiation in the North Water Polynya', Atmosphere - Ocean, vol. 39, no. 3, pp. 223-238.
Hanesiak JM, Barber DG, Papakyriakou TN, Minnett PJ. Parametrization schemes of incident radiation in the North Water Polynya. Atmosphere - Ocean. 2001 Sep;39(3):223-238.
Hanesiak, J. M. ; Barber, D. G. ; Papakyriakou, T. N. ; Minnett, Peter J. / Parametrization schemes of incident radiation in the North Water Polynya. In: Atmosphere - Ocean. 2001 ; Vol. 39, No. 3. pp. 223-238.
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