Infilled daily precipitation data for C1 chart recorder, 1952 - ongoing.

Precipitation data have been collected at the C1 climate station
(3022 m asl) almost continuously from 1952 to the present. C1 is on
locally level terrain on the southeastern flank of Niwot Ridge, 9.7
km east of the Continental Divide. Surrounding vegetation is
closed-canopy subalpine conifer forest. Through 1964, precipitation
was recorded using an unshielded U.S. Weather Bureau standard
totalizing gauge, with observations manually recorded on an
approximately weekly basis. The gauge was located in an open area
with sparse tree cover adjacent to the forest proper. Starting in
late 1961, daily precipitation has been recorded using a Belfort
Universal weighing-bucket gauge with chart recorder in an 8-m
diameter clearing in the forest; the forest provides natural
shielding for the gauge. The two records were assessed for an impact
of this station change on record homogeneity and merged (see
Methods). Missing daily data were infilled and multiday records were
parsed to dailies (see Methods).