Radiative Transfer and Heat Budget Processes on Arctic Sea Ice

Radiative Transfer and Heat Budget Processes on Arctic Sea Ice (2010-3/2013)

Main objectives of the project

Design and build a system for measuring the full radiation budget of a sea-ice surface, in which individual measurements are affected by the surface properties of an area a few meters in diameter, but which can be used to make many measurements over a large area, allowing an integration of the individual measurements into representative large-scale values.

Using data from this system and from other observations of energy-exchange and physical properties of the sea ice, gain an improved understanding of the processes that affect the energy budget of the first-year ice that will dominate the Arctic in the future.

Combine the observational data and a sophisticated radiative transfer model of the atmosphere-snow-ice-ocean system (CASIO-DISORT) to both improve the model and further understand the relevant processes and the role that different components in the system play in determining the energy budget.

Project partners

Stephen Hudson, Mats Granskog and Sebastian Gerland, Norwegian Polar Institute

Jakob J. Stamnes and Borge Hamre at Department of Physics and Technology, University of Bergen

Knut Stamnes at Stevens Institute, New Jersey, US

Donald Perovich, CRREL, USA

 

Activities and milestones

Field work on Svalbard fjords in spring 2010 on light transmission through sea ice

Initial modeling work using DISORT and field data in late 2010.

Presentation of results at the XX Ocean Optics and AGU Fall Meetings in late 2010.

In late 2010 and early 2011 the construction of our radiation sledge was in full swing. Tests done at the parking lot outside the institute.

Field work on landfast sea ice in Svalbard fjords (light transmission through sea ice and quantification of optically active substances in sea ice).

Field work in Barrow, Alaska in June 2011 - first use of radiation sledge on ponded sea ice for complete surface radiative energy balance.

Radiation sledge in Barrow

Publication of work in JGR on the sea-ice albedo feedback (see below).

Work on analysis of data collected in 2011 field campaigns. Manuscript preparation.

Presentation of results from Barrow field work at the AGU Fall Meeting 2011.

Development of improved sled for radiation measurements and planning for field work in Barrow (Alaska) in April and May-June 2012.

Radiation sledge, version 2, under development

 

Published results from pilot study in Barrow 2011 in Cold Regions Research and Technology (see below).

Final project  field campaigns in spring 2012 (Barrow, AK) to cover the radiation balance of sea ice throughout the melt period  and formation and evolution of met ponds on first-year Arctic sea ice (May-June). A description of the field campaign can be found here. Data set of the complete energy budget of Arctic sea ice spanning the winter to ponding and melt.

Presented results from 2012 field work at the 10th Anniversary conference of the Bjerknes Centre (Bergen, Norway).

Observations of radiative energy balance of meltponded Arctic first-year sea ice in the pack ice north of Svalbard in July-August 2012.

Published project related work in 2013; one paper  describing the solar transmittance through spring first-year Arctic sea ice, and another looking in detail on the energy budget and role of solar heating in melting of first-year Arctic sea ice in summer from observations in the pack ice

Presented results in 2013 at the DACA conference

Publications and presentations

Hudson, S. M. Granskog, B. Elder, D. Perovich, C. Petrich, M. Nicolaus. The Radiation Budget of Sea Ice during the Springtime Melt. European Geosciences Union, General Assembly 2012, Vienna, Austria. Poster.

Hudson, S., Nicolaus, M. , Granskog, M:, Gerland, S. and Wang, C. Observing Radiative Properties of a Thinner, Seasonal Arctic Ice Pack. American Geophysical Union Fall Meeting 2011, San Francisco, CA. Invited talk.

Hudson, S. M. Granskog, B. Elder, D. Perovich, C. Petrich, M. Nicolaus. The Radiation Budget of Sea Ice during the Springtime Melt. American Geophysical Union Fall Meeting 2011, San Francisco, CA. Poster. Download poster.

S. Hudson. 2011. Når snøhvitt blir mørkt hav. Klima, 4-2011, 14-15. Link [In Norwegian] .

Hudson, S., Hamre, B., Granskog, M.A., Stamnes, J. 2010. Factors Controlling Light Transmission Through Thin First-Year Arctic Sea Ice - Observations And Modelling. Ocean Optics XX, Anchorage, Alaska. Download poster.

Hudson, S., Hamre, B., Granskog, M., Stamnes, J., Gerland, S., Nicolaus, M., Lei. R. 2010. Factors Controlling Light Transmission Through Thin First-Year Arctic Sea Ice: Observations and Modeling. AGU Fall Meeting, 5-9 Dec 2010, San Francisco. Download poster (A4).

S. R. Hudson. 2011. Estimating the global radiative impact of the sea ice–albedo feedback in the Arctic, J. Geophys. Res., 116, D16102, doi:10.1029/2011JD015804.

Hudson, S.R., M.A. Granskog, T.I. Karlsen, K. Fossan. 2012. An integrated platform for observing the radiation budget of sea ice at different spatial scales, Cold Regions Science and Technology, doi:10.1016/j.coldregions.2012.05.002

Hudson, S., Mats. A. Granskog, A. Sundfjord, A. Randelhoff, A. H. H. Renner, D. V. Divine. 2013, Energy budget of first-year Arctic sea ice in advance stages of melt, Geophysical Research Letters, 40, 2679-2683. doi:10.1002/grl.50517

Nicolaus, M., C. Petrich, S. R. Hudson, and Mats A. Granskog. 2013, Variability of Light Transmission through Arctic Land-fast Sea Ice during Spring, The Cryosphere, 7. doi:10.5194/tc-7-1-2013