Preface: 22 years since the 1st edition of Sea Ice / David N. Thomas -- Sea ice thickness distribution / Robert Ricker, Luisa von Albedyll and Christian Haas -- Snow on sea ice and how it varies through the seasons / Stefanie Arndt, Melinda Webster, Matthew Sturm and Robert A. Massom -- Sunlight and sea ice -- optical properties / Donald K. Perovich, Bonnie Light and Marcel Nicolaus -- Sea ice from an engineer's perspective / Arttu PolojaÌ⁸rvi, Jukka Tuhkuri and Hayo Hendrikse -- Methods of satellite remote sensing of sea ice / Gunnar Spreen, Polona Itkin and Stefan Kern -- The rise and fall of Antarctic sea ice / Ted Maksym and Sharon Stammerjohn -- The fitful decline of Arctic sea ice / Walter N. Meier and Angela C. Bliss -- Sea ice and Arctic Ocean oceanography / Camille Lique, Yueng-Djern Lenn, Benjamin Rabe and Finlo Cottier -- Oceanography and sea ice of the Southern Ocean / F. Alexander Haumann and Michael P. Meredith -- Sea ice in Earth System Models / Zachary Espinosa, Lettie Roach, Cecilia M. Bitz and Dirk Notz -- Phyloecology of sea ice bacteria and archaea / Josephine Z. Rapp, Eeva A. Eronen-Rasimus, Jody W. Deming and Eric R. Collins, -- Primary production associated with sea ice / Stephanie M. Lim, Karley Campbell and Kevin R. Arrigo -- Sea ice food webs in transition / Erin H. Kunisch, Malin Daase and Kerrie M. Swadling -- Marine mammals and sea ice in the Arctic and Antarctic / Mia Wege, Kristin L. Laidre, Els Vermeulen and Elisa Seyboth -- Sea ice: A seabird world of its own / David Ainley, Nina J. Karnovsky and George Divoky -- Nutrients and organic matter dynamics in sea ice / Klaus M. Meiners, Delphine Lannuzel, Eva Leu and Kristina A. Brown -- Gas dynamics in sea ice / Odile Crabek, Bruno Delille, Sebastien Moreau and FrancÌʹois Fripiat -- Sea ice, aerosols and clouds / Jean-Christophe Raut, Jennie L. Thomas, Louis Marelle and Re̹my Lapere -- Cycling of contaminants across the ocean-sea ice-atmosphere interface / Zhiyuan Gao, Katarzyna Polcwiartek, Kedong Zhang and Feiyue Wang -- Numerical models of sea-ice biogeochemistry / Guila Castellani, Letizia Tedesco, Nadja Steiner and Martin Vancoppenolla -- Paleo sea ice reconstruction: Ancient warm periods / Amy Leventer and Jenny Pike -- Ice in subarctic seas / Hermanni Kaartokallio, CJ Mundy, Daiki Nomura, Takenobu Toyota and Jouni Vainio -- It's all about the happy people: A tale of joy and life around the sea ice / Kimberly Kivvaq Pikok, Henry P. Huntington, Craig George, Alex Kaleak Sr, Diedre Kalaek, Joe Mello Leavitt, Donna W. Hauser and Courtney Carothers -- The geopolitics of sea ice / Klaus Dodds, Pauline Pic, Liling Xu and Yelena Yermakova.