Posts Tagged «Bonnie Light»

Briegleb, B. P. and B. Light, “A Delta-Eddington Multiple Scattering Parameterization for Solar Radiation in the Sea Ice Component of the Community Climate System Model“, NCAR/TN-472+STR, 100pp, 2007.

Carns, R. C., Light, B. and Warren, S. G. (2016), The spectral albedo of sea ice and salt crusts on the tropical ocean of Snowball Earth: II. Optical modeling. J. Geophys. Res. Oceans, 121, doi:10.1002/2016JC011804

Codispoti, L. A., V. Kelly, A. Thessen, P. Matrai, S. Suttles, V. Hill, M. Steele, and B. Light (2013), Synthesis of primary production in the Arctic Ocean: III. Nitrate and phosphate based estimates of net community production, Prog. Oceanogr., 110, 126-150, doi:10.1016/j.pocean.2012.11.006.

Codispoti, L. A., V. Kelly, A.Thessen, P. Matrai, S. Suttles, V. J. Hill, M. Steele, B. Light, Synthesis of primary production in the Arctic Ocean: III. Nitrate and phosphate based estimates of net community production, Prog. Oceanogr., 2010.

The objectives of this research are to quantify the connection between seasonal warming of arctic surface waters and the absorption of solar energy, and additionally to identify the presence and seasonal cycling of materials responsible for this absorption. Seasonal changes in the attenuation of solar radiation within the sea ice and upper 30m of the water column will be measured at high temporal resolution (hourly) by a new proof of concept buoy system. Temperature and PAR (photosynthetically active radiation) irradiance measurements will be made using optical sensors paired with thermisters within the water column and sea ice. A fluorometer will…

The Arctic Data Center, supported by NSF, has highlighted Karen Junge’s work investigating rotten ice. Data has been collected on both the physical and biological properties of rotten ice and is available from the center.  

This project has two main objectives: 1) determination of the physical and microbial characteristics and microstructural evolution of sea ice exposed to severe melt; and 2) exploration of the influence of biogenic particles such as sea ice algae, bacteria and polymer gels on the melting behavior of sea ice.

Frantz, C. M., Light, B., Farley, S. M., Carpenter, S., Lieblappen, R., Courville, Z., Orellana, M. V., and Junge, K.: Physical and optical characteristics of heavily melted “rotten” Arctic sea ice, The Cryosphere, 13, 775-793,, 2019. 

Polar Science Center Chair Dr. Bonnie Light joined a group of international scientists in Bremerhaven, Germany in January 2023 to process and analyze sea ice core samples brought back from the 2019-2020 MOSAiC expedition. Photo Credit: Amy Lauren    

Frey, K., H. Eicken, D. K. Perovich, T. C. Grenfell, B. Light, L. H. Shapiro, and A. P. Stierle (2001), Heat budget and decay of clean and sediment-laden sea ice off the northern coast of Alaska, Port and Ocean Eng. in the Arctic Conference (POAC’01) Proceedings (3), Ottawa, Canada, 1405-1412.

Frey, K.E., D.K. Perovich and B. Light (2011). The spatial distribution of solar radiation under a melting Arctic sea ice cover, Geophysical Research Letters 38: doi:10.1029/2011GL049421.

Goldenson, N, S. J. Doherty, C. M, Bitz, M. M. Holland, B. Light, and A. J. Conley (2012), Arctic climate response to forcing from light-absorbing particles in snow and sea ice in CESM, Atmos. Chem. Phys. 12, 7903-7920, doi: 10.5194/acp-12-7903-2012.

Grenfell, T.C., B. Light, and M. Sturm (2002), Spatial distribution and radiative effects of soot in the snow and sea ice during the SHEBA experiment, J. Geophys. Res., 107(C10), 8032, 10. 1029/2000JC000414.

Hill, V. J., Light, B., Steele, M., & Zimmerman, R. C. (2018). Light availability and phytoplankton growth beneath Arctic sea ice: Integrating observations and modeling. Journal of Geophysical Research: Oceans, 123.

Holland, M.M., D.A. Bailey, B.P. Briegleb, B. Light, and E. Hunke.  Improved Sea Ice Shortwave Radiation Physics in CCSM4: The Impact of Melt Ponds and Aerosols on Arctic Sea Ice. Journal of Climate, Vol. 25, No. 5, March 2012: 1413-1430.

Huck, P., B. Light, H. Eicken, and M. Haller, “Mapping sediment-laden sea ice in the Arctic using AVHRR remote-sensing data: Atmospheric correction and determination of reflectances as a function of ice type and sediment load“, Remote Sensing of Environment, 107, 484-495, 2007.

Light, B., G.A. Maykut, and T.C. Grenfell,’ Effects of temperature on the microstructure of first-year Arctic sea ice’, J. Geophys. Res., 108, 10.1029/2001JC000887, 2003.

Light, B., S. Dickinson, D. K. Perovich, and M. M. Holland (2015), Evolution of summer Arctic sea ice albedo in CCSM4 simulations: Episodic summer snowfall and frozen summers, J. Geophys. Res., 120, 284–303, doi:10.1002/2014JC010149

Light, B. and G. L. Trusty (1990), One-dimensional translation measurement of speckle from rough rotating objects in ultraviolet illumination, Rep. NRL-FR-9293, 68 pp., Naval Research Laboratory, Washington DC.

Welch, J. A., B. Light, G. L. Trusty, and T. H. Cosden (1991), A laser test set for the low-power atmospheric compensation experiment satellite, Rep. NRL-FR-9360, 50 pp., Naval Research Laboratory, Washington DC.

Light, B., H. Eicken, G.A. Maykut, and T. C. Grenfell (1998), The effect of included particulates on the spectral albedo of sea ice, J. Geophys. Res.,103, 27,739-27,752.

Light, B., G.A. Maykut, and T.C. Grenfell,’ A two-dimensional Monte Carlo model of radiative transfer in sea ice’, J. Geophys. Res., 108, 10.1029/2002JC001513, 2003.

Light, B., G.A. Maykut, and T.C. Grenfell,’ A temperature-dependent, structural-optical model of first-year sea ice’, J. Geophys. Res., 109, 10.1029/2003JC002164, 2004.

Grenfell, T. C., B. Light, and D. K. Perovich (2006), Spectral transmission and implications for the partitioning of shortwave radiation in arctic sea ice, Ann. Glac., 44, 1-6. 

Light, B., T. C. Grenfell, and D. K. Perovich, “Transmission and absorption of solar radiation by Arctic sea ice during the melt season”, J. Geophys. Res., 113, C03023, doi:10.1029/2006JC003977, 2008.

Light, B., R. E. Brandt, and S. G. Warren,’ Hydrohalite in cold sea ice: Laboratory observations of single crystals, surface accumulations, and migration rates under a temperature gradient, with application to ‘Snowball Earth’‘, J. Geophys. Res., 114, C07018, doi:10.1029/2008JC005211, 2009.

Dadic, R., B. Light, and S. G. Warren, “Migration of air bubbles in ice under a temperature gradient, with application to ‘Snowball Earth’“, J. Geophys. Res., 115, D181258, doi:10.1029/2010JD0141., 2010.

Light, B. (2010), Theoretical and observational techniques for estimating light scattering in first-year Arctic sea ice, invited contribution to Light Scattering Reviews, vol. 5, edited by A. Kokhanovsky, Springer-Praxis, Berlin.

Light, B., R. C. Carns, and S. G. Warren (2015), “Albedo dome”: a method for measuring spectral flux-reflectance in a laboratory for media with long optical paths, Appl. Opt., 54(17), 5260–5269.

Light, B., D. K. Perovich, M. A. Webster, C. Polashenski, and R. Dadic (2015), Optical properties of melting first-year Arctic sea ice, J. Geophys. Res. Oceans, 120, 7657–7675, doi:10.1002/2015JC011163.

Light, B., Carns, R. C. and Warren, S. G. (2016), The spectral albedo of sea ice and salt crusts on the tropical ocean of Snowball Earth: I. Laboratory measurements. J. Geophys. Res. Oceans. 121, doi:10.1002/2016JC011803

Matrai, P. A., E. Olson, S. Suttles, V. J. Hill, L. A. Codispoti, B. Light, and M. Steele (2013), Synthesis of primary production in the Arctic Ocean: I. Surface waters, 1954-2007, Prog. Oceanogr., doi:10.1016/j.pocean.2012.11.004.

Maykut, G.A. and B. Light (1995), Refractive-index measurements in freezing sea-ice and sodium chloride brines, Appl. Opt., 34, 950-961.

Mudge, M.C., Nunn, B.L., Firth, E., Ewert, M., Hales, K., Fondrie, W.E., Noble, W.S., Toner, J., Light, B. and Junge, K.A., 2021. Subzero, saline incubations of Colwellia psychrerythraea reveal strategies and biomarkers for sustained life in extreme icy environments. Environmental Microbiology.

On Oct 1, 2021 after 12.5 years at the helm of PSC, Axel Schweiger stepped back from his role as Chair of PSC.  PSC sea ice researcher Bonnie Light has taken on the leadership role.   

The Arctic sea ice cover is undergoing tremendous change. There has been a pronounced decrease in the summer sea ice extent (Comiso et al., 2008; Serreze et al., 2007; Stroeve et al., 2007), an overall thinning of the ice, a lengthening of the summer melt season (Markus et al., 2009) and a fundamental shift to a primarily seasonal sea ice cover (Rigor and Wallace, 2004; Nghiem, et al. 2007, 2007; Maslanik et al., 2007, 2011). Some of the greatest changes have been observed in the Chukchi and Beaufort Seas, where there has been a substantial loss of summer ice.These changes…

It is argued that today only Antarctica provides sufficiently analogous ice surfaces to the specialized ones that are thought to have occurred under a Snowball Earth scenario. A combination of field observations of cold snow-free sea ice, salt encrusted sea-ice surfaces and blue glacial ice, laboratory experiments and modeling will be carried out to test the viability of the Snowball Earth hypothesis.

This project will carry out quantitative assessment of the drivers, effects, and ramifications of the seasonal timing of sea ice melt onset and freeze initiation over the observational record and using earth system model projections of future climate.

Perovich, D. K., B. Light, H. Eicken, K. F. Jones, K. Runciman, and S. V. Nghiem,’ Increasing solar heating of the Arctic Ocean and adjacent seas, 1979–2005: Attribution and role in the ice-albedo feedback’, Geophys. Res. Lett., 34, L19505, doi:10.1029/2007GL031480, 2007.

Perovich, D.K., T.C. Grenfell, B. Light, J.A. Richter-Menge, M. Sturm, W.B. Tucker III, H. Eicken, G.A. Maykut, and B. Elder (1999), SHEBA: Snow and Ice Studies CD-ROM.

Perovich, D.K., T.C. Grenfell, B. Light, and P.V. Hobbs (2002), Seasonal evolution of the albedo of multiyear Arctic sea ice, J. Geophys. Res., 107(C10), 8044, doi:10.1029/2000JC000438.

Perovich D. K., T. C. Grenfell, J. A. Richter-Menge, B. Light, W. B. Tucker III, and H. Eicken,’ Thin and thinner: Sea ice mass balance measurements during SHEBA,’, J. Geophys. Res., 108 (C3), 8050, doi:10.1029/2001JC001079, 2003.

Perovich, D. K., J. A. Richter-Menge, K. F. Jones, and B. Light,’ Sunlight, water, and ice: Extreme Arctic sea ice melt during the summer of 2007′, Geophys. Res. Lett., 35, L11501, doi:10.1029/2008GL034007, 2008.

Perovich, D.K., T.C. Grenfell, B. Light, et al.,’ Transpolar observations of the morphological properties of Arctic sea ice’, J. Geophys. Res., 114, 10.1029/2008JC004892, 2009.

Perovich, D.K., K. F. Jones, B. Light, H. Eicken, T. Markus, J Stroeve, R. Lindsay (2011), Solar partitioning in a changing Arctic sea-ice cover, Ann. Glac., 52, 192-196.

Perovich, D.K., J. A. Richer-Menge, K. F. Jones, B. Light, B. C. Elder, C. Polashenski, D. Laroche, T. Markus, R. Lindsay (2011), Arctic  sea- ice melt in 2008 and the role of solar heating, Ann. Glac., 57, 355-359.

Polashenski, C., D. K. Perovich, K. E. Frey, L. W. Cooper, C. I. Logvinova, R. Dadic, B. Light, H. P. Kelly, L. D. Trusel, and M. Webster (2015), Physical and morphological properties of sea ice in the Chukchi and Beaufort Seas during the 2010 and 2011 NASA ICESCAPE missions, Deep. Res. Part II Top. Stud. Oceanogr., 118, 7–17, doi:10.1016/j.dsr2.2015.04.006.

The focus of this project is to synthesize existing studies and data relating to Arctic Ocean primary production and its changing physical controls such as light, nutrients, and stratification, and to use this synthesis to better understand how primary production varies in time and space and as a function of climate change.

The response of Arctic sea ice to a warming climate includes decreases in extent, lower ice concentration, and reduced ice thickness. Summer melt seasons are lengthening with earlier melt onsets and later autumn freezeups. We believe this will likely lead to an increase in so-called “rotten ice” in the Arctic at the end of summer. This ice has experienced a long summer of melt, is fragile, difficult to work with, and has received little attention. Comprehensive information on its physical and microbiological properties does not exist. Our team is embarking on an ambitious field campaign in order to study this poorly-understood type of sea ice in the context of its microstructural properties and potential for habitability.

We propose to use data analysis and modeling to constrain the salt chemistry of the soil measured by Phoenix in the context of soil chemistry measured by the Viking Landers (VLs), Mars Pathfinder (MPF) and the two Mars Exploration Rovers (MERs).