Multi-year time series from data loggers in several cinder cones on the Mauna Kea summit plateau, Hawaii. The variable measured is primarily ground temperature, but several time series for air temperature and relative humidity have also been obtained. Study sites, time period: Puu Wekiu (Summit Cone Crater), 2012-2022 Puu Hau Kea (Goodrich Cone), 2012-2022 Puu Waiau, 2013-2016 Puu Pohaku (Douglas Cone), 2014-2016 Puu Makanaka, 2016 The raw data are downloads from HOBO data loggers. The reduced data are merged time series without time gaps and corrected for known issues. A list of data loggers with time periods and sensor depths is provided in loggers_summary_mk.csv. For file formats and further information, see README.TXT. For context see references.

{"references": ["Schorghofer, N., M. Leopold, K. Yoshikawa. State of high-altitude permafrost on tropical Mauna Kea volcano, Hawaii. Permafrost and Periglacial Processes 28, 685-697 (2017)", "Leopold, M., A. Morelli, N. Schorghofer. Subsurface architecture of two tropical alpine desert cinder cones that hold water. Journal of Geophysical Research 121, 1148-1160 (2016)", "Schorghofer, N., S. Businger, M. Leopold. The coldest places in Hawaii: The ice-preserving microclimates of high-altitude craters and caves on tropical island volcanoes. Bulletin of the American Meteorological Society 99(11), 2313-2324 (2018)"]}