This new data set is a concerted effort to collect as many observations of sea ice thickness as possible in one place with consistent formats and with clear and abundant documentation. It will allow the community to better utilize what is now a considerable body of observations from moorings, submarines, aircraft, and satellites.
Posts Tagged «Ron Lindsay»
The role and magnitude of feedback processes, such as the ice-albedo feedback cannot be observed. They must be diagnosed from validated models that include the appropriate physics. For example, observational studies, attempting to discern the effect of clouds on sea ice (e.g. Schweiger et al 2008) confront the difficulty of separating cloud variability from other changes, such as atmospheric circulation. Model experiments that can isolate the role of a specific mechanism (e.g. Bitz, 2009) are needed to test and advance our current understanding of feedbacks in the atmosphere-ice-ocean system and to ultimately improve predictive capabilities for weather and climate. The…
The Bering Strait is the only Pacific gateway to the Arctic Ocean. Waters flowing through the strait are a key source of nutrients, heat and freshwater for the Arctic. Since 1990, APL-UW has measured the properties of this throughflow using long-term in situ moorings, supported by annual cruises. Project details, data, cruise reports and papers are available on the project web site.
The primary objective of this research is to construct a comprehensive bias-corrected sea ice thickness record and use it to better quantify and understand the dramatic changes that have been observed in the Arctic ice pack. To do this all available Arctic sea ice thickness observations will be integrated, from satellite, aircraft, and subsurface measurements, and used to identify and correct systematic errors through comparisons with a common reference. With the resultant record four science questions will be answered:• What are the systematic differences between different measurement systems for sea ice thickness?• What are the spatial patterns in the trends…
Bitz, C., P. Gent, R.A. Woodgate, A. Hall, M. Holland and R. Lindsay,’ The influence of sea-ice on ocean heat uptake in response to increasing CO2′, J. Climate, 19, 2437-2450, 2006.
Seasonal Anomaly Maps — each product compred to the ensemble medianSeasonal Trend Maps — seasonal trends of each variableThis work has been published in the Journal of Climate (Lindsay, R., M. Wensnahan, A. Schweiger, and J. Zhang, 2014: Evaluation of seven different atmospheric reanalysis products in the Arctic. J. Climate, DOI: 10.1175/JCLI-D-13-00014.1. )AbstractAtmospheric reanalyses depend on a mix of observations and model forecasts. In data-sparse regions such as the Arctic, the reanalysis solution is more dependent on the model structure, assumptions, and data assimilation methods than in data-rich regions. Applications such as the forcing of ice-ocean models are sensitive to…
IceBridge is a NASA project that supports the acquisition of various data from aircraft in both polar regions that will bridge the gap in coverage between the now defunct ICESat satellite and the next generation ICESat II to be launched in 2015 at the earliest. The main focuses of the data acquisition will be laser altimetry and radar measurements of ice sheets (Greenland and Antarctica) and sea ice (Arctic and Antarctica).
In recent years the ice extent in the Arctic has been much reduced from that of historical norms and the ice-albedo feedback is often cited as a major factor in causing this accelerated summer ice retreat. An important countervailing feedback is the ice thickness-growth feedback wherein thin ice grows much more quickly in the winter than thick ice. The strength of this negative feedback mechanism depends on the rate heat is lost from the surface to the atmosphere. The primary objectives of this project are to better understand how rapidly the extra summer heat absorbed in the Arctic Ocean in…
Johnson, M, A. Proshutinsky, A. Nuyen, R. Lindsay, C. Haas, J. Zhang, N. Diansky, R. Kwok, W. Maslowski, S. Hakkinen, I. Ashik, B. deCuevas, 2012: Evaluation of Arctic sea ice thickness simulated by AOMIP models. J. Geophys. Res., 117, C00D13, doi:10.1029/2011JC007257.
Levermann A., J. Bamber, S. Drijfhout, A. Ganopolski, W. Haeberli, N.R.P. Harris, M. Huss, T. M. Lenton, R.W. Lindsay, D. Notz, P. Wadhams, and S. Weber, 2010: Climatic Tipping Elements with potential impact on Europe, The European Topic Centre on Air and Climate Change, (ETC/ACC) Technical Paper 2010/3, July 2010.
Levermann, A., Bamber, J., Drijfhout, S., Ganopolski, A., Haeberli, W., Harris, N. R. P., Huss, M., Krüger, Kirstin, Lenton, T., Lindsay, R. W., Notz, D., Wadhams, P. and Weber, S., 2010: Potential climatic transitions with profound impact on Europe – Review of the current state of six ‘tipping elements of the climate system’, Climatic Change . ISSN 0165-0009.
Lindsay, R. W., 2010: A new sea ice thickness climate data record, Eos, 44, 405–406.
Lindsay, R., M. Wensnahan, A. Schweiger, and J Zhang, 2014, Evaluation of seven different atmospheric reanalysis products in the Arctic, J. Climate, DOI: 10.1175/JCLI-D-13-0014.1.
Lindsay, R., C. Haas, S. Hendricks, P. Hunkeler, N. Kurtz, J. Paden, B. Panzer, J. Sonntag, J. Yungel, and J. Zhang, 2012: Seasonal forecasts of Arctic sea ice initialized with observations of ice thickness, Geophys. Res. Lett., 39, L21502, doi:10.1029/2012GL053576.
Lindsay, R. W. and J. Zhang, “The thinning of arctic sea ice, 1988-2003: Have we passed a tipping point?“, J. Climate, 18, 4879–4894, 2005.
Lindsay, R. and A. Schweiger, Arctic sea ice thickness loss determined using subsurface, aircraft, and satellite observations, The Cryosphere, 9, 269-283, doi:10.5194/tc-9-269-2015, 2015
Lindsay, R.W., and A.P. Makshtas,’ Air-sea interaction in the presence of the arctic pack ice’, in Arctic Environment Variability in the Context of Global Change, edited by L.P. Bobylev, K.Y. Kondratyev, K. Kondrashin, and O.M. Johannessen, 203-236, Springer Verlag, 2003.
Lindsay, R.W., and H.L. Stern, “A new Lagrangian model of Arctic sea ice“, J. Phys. Oceanogr., 34, 272-283, 2004.
Lindsay, R. W. and J. Zhang, “Assimilation of ice concentration in an ice-ocean model”, J. Atmos. Ocean. Tech., 23, 742-749, 2006.
Lindsay, R.W., and H.L. Stern,’ The RADARSAT geophysical processor system: Quality of sea ice trajectory and deformation estimates‘, J. Atmos. Ocean. Technol., 20, 1333-1347, 2003.
Lindsay, R. W.,’ Climatic Oscillations’, in The Encyclopedia of the Arctic, Routledge, New York, 2004.
Lindsay, R. W.,’ Energy Balance’, in The Encyclopedia of the Arctic, Routledge, New York, 2004.
Lindsay, R. W., J. A. Francis, O. G. Persson, D. A. Rothrock, and A. J. Schweiger, “Surface Turbulent Fluxes over Pack Ice Inferred from TOVS observations”, Annals of Glaciology, 33(8), 948-963, 1997.
Lindsay, R.W., “Temporal variability of the energy balance of thick Arctic pack ice“, J. Climate, 11, 313-331, 1998.
Lindsay, R.W., and H.L. Stern, 1999, Aircraft-based estimates of thin-ice fraction near SHEBA, Proceedings of the Fifth Conference on Polar Meteorology and Oceanography, American Meteorological Society, January 15-20, Dallas.
Lindsay, R.W., “Arctic sea-ice albedo derived from RGPS-based ice thickness estimates“, Ann. Glaciol., 30, 225-229, 2001.
Lindsay, R.W., J. Zhang, and D.A. Rothrock, “Sea-ice deformation rates from satellite measurements and in a model”, Atmos. Ocean, 41, 35-47, 2003.
Lindsay, R.W., “Changes in the modeled ice thickness distributions near the Surface Heat Budget of the Arctic Ocean (SHEBA) drifting ice camp“, J. Geophys. Res., 108, 10.1029/2001JC000805, 2003.
Lindsay, R.W., D.M. Holland, and R.A. Woodgate, “Halo of low ice concentration observed over the Maud Rise seamount“, Geophys. Res. Lett., 31, 10.1029/2004GL019831, 2004.
Lindsay, R. W. and J. Zhang, 2005: The dramatic thinning of arctic sea ice, 1988-2003: have we passed a tipping point?. J. Climate, 18, 4879-4894.
Lindsay, R. W. and J. Zhang, “Arctic Ocean ice thickness: modes of variability and the best locations from which to monitor them”, J. Physical Ocean, 36, 496-506, 2006.
Lindsay, R.W., J. Zhang, A. Schweiger, and M.A. Steele, Seasonal predictions of ice extent in the Arctic Ocean, J. Geophys. Res., 113, C02023, doi:10.1029/2007JC004259, 2008.
Lindsay, R.W., R. Kwok, L. de Steur, W. Miere, “Halo of Ice Deformation Observed Over the Maud Rise Seamount”, Geophys. Res. Lett., 35, L15501, doi:10.1029/2008GL034629, 2008.
Lindsay, R. W., J. Zhang, A. Schweiger, M. Steele, and H. Stern, Arctic sea ice retreat in 2007 follows thinning trend, J. Climate, 22, 165-176, doi:10.1175/2008JCLI2521.1, 2009.
Liu, Z., A. Schweiger, and R. Lindsay (2015), Observations and Modeling of Atmospheric Profiles in the Arctic Seasonal Ice Zone, Monthly Weather Review, 143(1), 39-53.
Marsan, D., H. Stern, R. Lindsay, and J. Weiss, “Scale dependence and localization of the deformation of arctic sea ice“, Phys. Rev. Lett., 93, 17, 2004.
Scientific American reports on a new study deriving ice thickness trends from measurements by the Polar Science Center’s Ron Lindsay and Axel Schweiger’s article published in The Cryosphere.
Perovich, D., E. L. Andreas, J. A. Curry, H. Eiken, C. W. Fairall, T. C. Grenfell, P. S. Guest, J. Intrieri, D. Kadko, R. W. Lindsay, M. G. McPhee, J. Morison, R. E. Moritz, C. A. Paulson, W. S. Pegau, P. O. G. Persson, R. Pinkel, J. A. Richter-Menge, T. Stanton, H. Stern, M. Sturm, W. B. Tucker III, and T. Uttal. “Year on ice gives climate insights.” EOS, Trans. Amer. Geophys. Union, 80 (41), 481-486, 1999.
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, doi:10.3189/172756411795931543.
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, doi:10.3189/172756411795931714.
Rampal, P., J. Weiss, D. Marsan, R. Lindsay, and H. Stern, 2008, Scaling properties of sea ice deformation from buoy dispersion analysis, J. Geophys. Res., 113, C03002, doi:10.1029/2007JC004143.
Rampal, P., Weiss, D. Marsan, R. Lindsay, and H. Stern, 2008, Scaling properties of sea ice deformation from buoy dispersion analysis, J. Geophys. Res., 113, C03002, doi: 10.1029/2007JC004143.
Clouds play a major role in the arctic surface energy balance controlling the growth and melt of sea ice. At the same time the processes involved in the formation, maintenance and dissipation of cloud cover over the Arctic Ocean are thought to be strongly influenced by the sea ice itself. This project will advance the understanding of this interaction and feedback by asking: What is the response of Arctic clouds to diminishing sea ice?
Schweiger, A., R. Lindsay, J. Zhang, M. Steele, H. Stern, R. Kwok, Uncertainty in modeled arctic sea ice volume, J. Geophys. Res., 116, C00D06, doi:10.1029/2011JC007084, 2011.
Schweiger, A.J., R.W. Lindsay, J.R. Key, and J.A. Francis, “Arctic clouds in multiyear satellite data sets“, Geophys. Res. Lett., 26(13), 1845-1848, 1999.
Schweiger, A. J., R. W. Lindsay, J. A. Francis, J. Key, J. M. Intrieri, and M. D. Shupe, “Validation of TOVS Path-P data during SHEBA“, J. Geophys. Res.,C., 107(10), SHE 17-11 – 17-20, 2002.
Schweiger, A.J., Lindsay, R.W., Vavrus, S., Francis, J.A., “Relationships between Arctic Sea Ice and Clouds during Autumn”, Journal of Climate, doi: 10.1175/2008JCLI2156.1, 2008a.
Schweiger, A.J., J. Zhang, R.W. Lindsay, and M. Steele, Did unusually sunny skies help drive the record sea ice minimum of 2007?, Geophys. Res. Lett., 35, L10503, doi:10.1029/2008gl033463, 2008.
Project investigators aim to improve upon the existing seasonal ensemble forecasting system and use the system to predict sea ice conditions in the arctic and subarctic seas with lead times ranging from two weeks to three seasons.
Steele, M., S. Dickinson, J. Zhang, and R.W. Lindsay, Seasonal ice loss in the Beaufort Sea: Toward synchrony and prediction, J. Geophy. Res., 120, 1118-1132, doi:10.1002/2014JC010247, 2015.