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The Iceland Greenland Seas Project

2019; American Meteorological Society; Volume: 100; Issue: 9 Linguagem: Inglês

10.1175/bams-d-18-0217.1

1520-0477

Ian A. Renfrew, Robert S. Pickart, Kjetil Våge, G. W. K. Moore, Thomas J. Bracegirdle, Andrew D. Elvidge, Emil Jeansson, Tom Lachlan‐Cope, Leah McRaven, Lukas Papritz, Joachim Reuder, Harald Sodemann, Annick Terpstra, Stephanie Waterman, Héðinn Valdimarsson, Alexandra Weiss, Mattia Almansi, Frank Bahr, Ailin Brakstad, Christopher Barrell, Jennifer Brooke, Barbara Brooks, Ian M. Brooks, M. E. Brooks, Erik Magnus Bruvik, Christiane Duscha, Ilker Fer, Heidi Midtgarden Golid, Matilda Hallerstig, I. Hessevik, Jie Huang, L. Houghton, Steingrímur Jónsson, Marius O. Jonassen, Karen Roberts Jackson, Karsten Kvalsund, Erik W. Kolstad, Kjersti Konstali, J. Kristiansen, R. Ladkin, Peigen Lin, Andreas Macrander, A. Mitchell, Haraldur Ólafsson, Astrid Pacini, Chris Payne, Bolli Pálmason, M. Dolores Pérez‐Hernández, Algot K. Peterson, Guðrún Nína Petersen, Maria N. Pisareva, James O. Pope, Andrew Seidl, Stefanie Semper, Denis E. Sergeev, Silje Skjelsvik, Henrik Søiland, Daniel Smith, Michael A. Spall, Thomas Spengler, Alexandra Touzeau, George H. Tupper, Yongbiao Weng, K. D. Williams, Xiao‐Yi Yang, Shenjie Zhou,

Oceanographic and Atmospheric Processes

Abstract The Iceland Greenland Seas Project (IGP) is a coordinated atmosphere–ocean research program investigating climate processes in the source region of the densest waters of the Atlantic meridional overturning circulation. During February and March 2018, a field campaign was executed over the Iceland and southern Greenland Seas that utilized a range of observing platforms to investigate critical processes in the region, including a research vessel, a research aircraft, moorings, sea gliders, floats, and a meteorological buoy. A remarkable feature of the field campaign was the highly coordinated deployment of the observing platforms, whereby the research vessel and aircraft tracks were planned in concert to allow simultaneous sampling of the atmosphere, the ocean, and their interactions. This joint planning was supported by tailor-made convection-permitting weather forecasts and novel diagnostics from an ensemble prediction system. The scientific aims of the IGP are to characterize the atmospheric forcing and the ocean response of coupled processes; in particular, cold-air outbreaks in the vicinity of the marginal ice zone and their triggering of oceanic heat loss, and the role of freshwater in the generation of dense water masses. The campaign observed the life cycle of a long-lasting cold-air outbreak over the Iceland Sea and the development of a cold-air outbreak over the Greenland Sea. Repeated profiling revealed the immediate impact on the ocean, while a comprehensive hydrographic survey provided a rare picture of these subpolar seas in winter. A joint atmosphere–ocean approach is also being used in the analysis phase, with coupled observational analysis and coordinated numerical modeling activities underway.