Data set creator(s): Mark Losleben
For data content questions, contact Niwot LTER data manager
For methodology questions, contact Jennifer Morse
INSTAAR, University of Colorado
1560 30th St., UCB 450
Boulder, CO 80309-0450
Search tips: Core Area, Discipline, Site, Variable, Investigator, Year, etc.
1. Use our data freely. All Niwot LTER data products (except some recent data sets for which metadata but not data are available) are released to the public and may be freely copied, distributed, edited, remixed, and built upon under the condition that you provide acknowledgement as described below.
2. Give proper acknowledgement. Publications, models and data products that make use of these data sets must include proper acknowledgement, including citing data sets in a similar way to citing a journal article. See http://www.datacite.org/whycitedata). The following acknowledgment should accompany any publication or citation of these data: Logistical support and/or data were provided by the NSF supported Niwot Ridge Long-Term Ecological Research project and the University of Colorado Mountain Research Station
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Precipitation data were collected on a daily time-scale from the C-1 climate station (3018 m) since 1952. Over time various circumstances have led to days with missing values. Some of these missing values were estimated from nearby climate stations.
Study site was C1 climate station (3018 m).
1952/10/1 - ongoing
precipitation, qualifying days, precipitation method flag
Elevation: 3048 m
Niwot Ridge (USFS - UNESCO Biosphere Reserve)
Located in: USFS - UNESCO Biosphere Reserve
(Click to learn more about these locations)
More data from: C1
Core Data Set: No
Award Or Grant: DEB-1027341
The qualifying days variable is the number of days to which a precipitation value pertains.
Missing dates from the Niwot Ridge data set were determined that crossed month or year boundaries for data up to 2008. When such missing dates were found, adjacent sites where data were present were identified in a pre-determined hierarchy (see below).
(Method Flag 1) Daily Ratio Methodology:
Total precipitation for the date in question was calculated for the the period 1968-2008, for both the 'Known Site' and the 'Unknown Site', only for days where daily values existed for both sites (missing values and QD's > 1 were removed). A ratio was determined [Unknown Site : Known Site] based upon these totals. This ratio was then multiplied by the value for that date at the 'Known Site' in order to determine the 'Unknown Site' value.
(Method Flag 2) If there was a known total at the 'Unknown Site' that crossed over into the following month, then the known reported total was kept, and the newly determined values were ratio-ed based upon that known total.
Precipitation data adjacency hierarchy:
1) Allenspark (AP)
3) Saddle (if not in winter [OCT-MAY] due to bias that blowing snow can have)
4) Winter Park (WP)
2010-02-09 Ppt likely fell on 2010-02-07
2010-02-16 Ppt likely fell on 2010-02-13
2010-02-23 Ppt likely fell on a previous day
2010-03-30 Ppt likely fell on 2010-03-26
2010-07-27 Ppt likely fell on 2010-07-28
2011-01-24 Pen fell off chart
2011-06-08 to 06-13 Slow clock
2011-09-07 Pen fell off chart
2012-05-29 to 06-05 Pen in gauge stuck; 3 mm = weekly total
2013-04-02 Pen may have been stuck and then released when opening precip gauge; total for week = 4mm
2013-04-09 Lost pin to hold chart on 04-09; replaced 04-09. No chart data 04/09 - 04/11 1330 MST
2013-04-16 Collector over-topped with snow
2013-04-30 Slow clock; total for week = 0 mm
2013-05-07 Slow clock; total for week = 43 mm
2013-05-14 Slow clock; pen fell off chart
2013-05-20 Broken pen; data suspect? Total for week = 3 mm
2013-05-28 Broken pen; data suspect? Total for week = 5 mm
2013-06-04 Total for week = 6 mm
2013-06-11 Total for week = 4 mm
2013-06-18 Pen fell off chart; total for week = 4 mm
2013-06-25 Pen fell off chart; total for week = 1 mm
2013-07-02 Pen fell off chart; total for week = 25 mm
2013-07-16 Pen fell off chart; ppt for 2 weeks = 999
2013-08-06 Pen fell off chart; total for week = 22 mm
2013-08-13 Pen fell off chart; total for week = 18 mm
2013-09-17 Pen fell off chart; total for week = 146 mm
2013-09-24 Pen fell off chart; ppt 9/23 - 9/24 = 7 mm
2013-10-08 Pen fell off chart; total for week = 14 mm
2013-10-21 Pen fell off chart; ppt 10/17 - 10/21 = 11 mm
2013-11-16 Pen fell off chart; ppt 11/12 - 11/16 = 10 mm
2013-12-10 Pen fell off chart; total for week = 17 mm
2014-02-12 Operator error; pen not started on chart. No ppt data this week
2014-04-02 Pen fell off chart
2014-04-08 Pen fell off chart; total 4-2 to 4-8 = 23 mm
2014-04-22 Pen fell chart; total 4-8 to 4-22 = 37 mm
2014-05-10 Pen fell off chart; total 5-11 to 5-12 = 46 mm
2014-05-27 Pen fell off chart; total 5-21 to 5-27 = 47 mm
2014-06-03 Total for week = 1 mm
2014-06-10 Total for week = 2 mm
2014-06-13 Pen fell off chart; total 6-12 to 6-13 = 1 mm
2014-06-17 Pen fell off chart; total 5-15 to 6-17 = 1 mm
2014-07-08 Pen fell off chart; total 7-1 to 7-8 = 8 mm
2014-11-04 Pen fell off chart; total 10-28 to 11-4 = 2 mm
No infilling for 2010 - 2014 data was performed.
climate, weather, meteorology, precipitation, C1, chart recorder, Niwot Ridge LTER, NWT, climatology, infilling, sensor data, long term
COL1. label=date, type=string, units=none, missing value indicator=NaN, minimum=1952-10-01, maximum=, precision=1, definition=date (yyyy-mm-dd)
COL2. label=precip, type=real, units=millimeter, missing value indicator=NaN, minimum=0, maximum=, precision=1, definition=precipitation (cm)
COL3. label=qdays, type=integer, units=day, missing value indicator=NaN, minimum=1, maximum=, precision=, definition=qualifying days
COL4. label=method_flag, type=integer, units=none, missing value indicator=NaN, minimum=, maximum=, precision=1, definition=precipitation method flag
*Note: To ask a question about data content, please contact the data manager HERE
To ask a question about methodology, please contact Jennifer Morse,
Greenland, D.E. 1987. The climate of Niwot Ridge. University of Colorado Long-Term Ecological Research Data Report 87/7.
The initial iteration of this file was generated by Todd Ackerman over the course of March - November 2006. The file was put under sccs control on 15 November 2006.[TMA 15 November 2006] Data for 2005 and 2006 were appended to the data section.[TMA 05 February 2007] Data for 2007 were appended to the data section.[TMA 26 March 2008] Data for 2008 were appended to the data section.[TMA 3 February 2009] Data for 2009 were appended to the data section.[HCH 3 September 2010] Data for 2010 were appended to the data section.[HCH 12 December 2011] 2011 and 2012 data were appended; title, keywords, comments, and cols were edited. Dates were changed to yyyy-mm-dd and missing values to NaN. [HCH 30 June 2013] Data for 2013 and 2014 were appended along with chart notes. Column labels were edited and column definitions were added.[HCH 12 May 2015]
Losleben, Mark. 2017. Precipitation data for C1 chart recorder from 1952/10/1 - ongoing, daily. http://niwot.colorado.edu
This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-1637686. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necesarily reflect the views of the National Science Foundation.
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