##Title: Cedar River Watershed iButton Air Temperature 
##Metadata for Cedar_OUT_ib_air_temp_wy2011-2014.csv
##Contact:  Susan E. Dickerson-Lange (dickers@uw.edu), University of Washington
##Updated: 4/14/2015
##PI:  Jessica D. Lundquist (jdlund@uw.edu), University of Washington 
##Phone:  (206) 685-7594
##Address:  Civil & Environmental Engineering, 201 More Hall, Box 352700, Seattle, WA 98195-2700
##Website:  http://depts.washington.edu/mtnhydr/
##Funding:  National Science Foundation, CBET-0931780

Summary:
Hourly and 2-hourly ground temperature observed air temperature sensors (Maxim DS 1922L thermochrons and Maxim DS 1923 hygrochrons) deployed 1-3 m high in select experimental forest plots (see data citation paper, below, for description of forest plots). Sensors were deployed within branches of conifer trees and inside funnels, which together served as radiation shields, after Lundquist and Hugget [2008, Water Resources Research].  See location metadata for coordinates and silvicultural treatments/forest types represented by each plot.  Observations were collected from water year 2011 through water year 2014, with new locations added in water year 2013.  Records are not continuous at each location because sensors were deployed in the summer/fall and retrieved in the summer/fall, and in some cases there was a gap during which no instrument was present.  In other cases, the record is not continuous because an instrument was not deployed, or failed. Each location ID is unique to a single location (X,Y,and Z) in the Cedar River Municipal Watershed. However, note that the exact height of each sensor is estimated and may have varied from year to year.  

Accuracy and Quality Control
Manufacturer reported accuracy for temperature observations is ± 0.5 °C.   These are raw data that have not been quality-controlled.  Also, note that these sensors are launched and stopped in the office, so the ends of each data record do not represent environmental conditions at the location ID.  These artifacts have not been removed from the data.

Location:
Cedar River Municipal Watershed
Approximate Coordinates:  47° 20’ N, 121° 32’ W  (datum:  WGS 1984)
near North Bend, Washington, USA  (King County)

Date(s) of Data Collection:  
17 November 2010 through 21 July 2014 (not continuously)

Data Citation:
Dickerson-Lange, S.E., Lutz, J.A., Gersonde, R., Martin, K.A., Forsyth, J., and J.D. Lundquist (2015, in preparation for Water Resources Research), Field observations of distributed snow depth and snow duration within diverse forest structures in a maritime mountain watershed

Variables and Units:
LocalDateTime - full time stamp in PDT/PST, yyyy-mm-dd hh:mm:ss tz
UTCOffset - Hours difference from UTC Time
WaterYear - Water year, e.g. Water Year 2013 = 2012-10-01 through 2013-09-30.  Based on local time.
DateTimeUTC - full time stamp in UTC, yyyy-mm-dd hh:mm:ss tz
Year - Calendar year, yyyy (UTC)
Month - Calendar month (UTC)
Day - Calendar day (UTC)
Hour - Hour of day, midnight = 0 (UTC)
Julian - Julian day of the year (UTC)
AIR501 through AIR511 - Air temperature sampled at each timestep (0.5 degree resolution), , where the header refers to a sample location ID that can be used to look up the metadata for the location.  NA = no data.   Degrees Celcius.