README
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DESCRIPTION
Multi-year ground temperature, air temperature, and humidity time series from five cinder cones on Mauna Kea, Hawaii 2012-2016


CONTENT

Context information for each data logger (csv format)
   loggers_summary_mk.csv
This file contains logger numbers and locations, sensor depths, measurement periods, and miscellaneous information.

Reduced data logger time series (plain text format, some zipped with Zip 3.0)
   wek*.dat	Puu Wekiu (18 files, zipped)
   hau*.dat	Puu Hau Kea (11 files, zipped)
   poh*.dat	Puu Pohaku (2 files)
   wai*.dat	Puu Waiau (2 files)
   mak*.dat	Puu Makanaka (3 files)
Quantities and units are given in file headers. Missing values are assigned -999.

Raw data logger time series (Hobo file format)
   YEARmon_loggernr.hobo (111 files)
The reduced data are derived from these raw data. The following processing steps were taken: adjust time zone to HST when necessary, conversion to plain text format with HOBOware, merge data sets, remove initial transients, fill data gaps with -999, and correct for other known issues when possible. YEARmon indicates the year and month of the readout. The mapping between logger numbers and locations is provided in loggers_summary_mk.csv

GPS coordinates (Keyhole Markup Language)
   loggers_gps.kml
When multiple measurements were taken with a handheld GPS unit, the median is reported. Note that GPS coordinates are not always reliable and accurate. Nominal uncertainty is +/-3m. 


NOTE
Context and results for this study are provided in:
* 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). doi:10.1002/2016JF003853
* Schorghofer, N., M. Leopold, K. Yoshikawa. State of high-altitude permafrost on tropical Maunakea volcano, Hawaii. Permafrost and Periglacial Processes, in press (2017). doi:10.1002/ppp.1954
* 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. In preparation.


FUNDING
This material is based upon work supported by the Office of Maunakea Management and by the National Aeronautics and Space Administration through the NASA Astrobiology Institute under Cooperative Agreement No. NNA09DA77A issued through the Office of Space Science.


CONTACT
Norbert Schorghofer (University of Hawaii / Planetary Science Institute)