The late 20th century and now near the end of first decade of the 21st century have witnessed the accelerated melting of glaciers and ice sheets, the breakup of ice shelves, the thawing of permafrost, increased discharges of northern Eurasian river systems, changes of cloud cover and atmospheric circulation, changes in terrestrial snow cover, and the rise of global mean sea level, all manifestations of the state of the cryosphere and hydrosphere in flux during climate change. Non-stationary processes pose challenges to interpretation of long- and short-term trends and modeling future states of the cryosphere and hydroshpere. We welcome papers of recent progress toward evaluation and uncertainty of the elements of the cryosphere and hydrosphere, the balances of energy and mass, glaciers, ice sheets, ice streams, and ice shelves, the northern river systems, terrestrial groundwater, permafrost and active layer, snow cover, global and local mean sea levels, and the interconnections of global and local water and energy cycles.

Solicited people: Masahiro Hori, hori.masahiro@jaxa.jp; Mojib Latif, mlatif@ifm-geomar.de; Julia Boike, Julia.Boike@awi.de; Jay Zwally, zwally@icesat2.gsfc.nasa.gov;