Cold air drainage transect studies at the Andrews Experimental Forest, 2002 to Present

  • Creator(s): Christopher Daly
  • PI(s): Christopher Daly
  • Originator(s): Christopher Daly
  • Other researcher(s): Joseph I. Smith, Adam M Kennedy, Greg M Cohn, David Rupp
  • Dates of data collection: Jan 12 2001 - Oct 11 2022
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • DOI:
  • Last update: Apr 8 2023 (Version 6)
<Citation>     <Acknowledgement>     <Disclaimer>    
Daly, C. 2023. Cold air drainage transect studies at the Andrews Experimental Forest, 2002 to Present. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: Accessed 2024-06-15.
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 2025755), US Forest Service Pacific Northwest Research Station, and Oregon State University.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
Temperature data are being collected to investigate the effects of elevation and local topographic position on the patterns of cold air drainage and pooling in the HJ Andrews Forest, and how they vary with synoptic weather patterns. The main focus of the study is cold air drainage in the Lookout Creek area, but others sites have been added to sample temperature signatures at other locations of the forest with topographic positions that need to be better understood. Here, quality controlled 15-minute raw data and aggregated daily minimum and maximum temperatures are available from several stations along 4 separate transects or clusters with some additional single sensors also included. Several of the quality flags indicate that the data failed the test and should not be used in analysis.

Study Description Study Site Map Download Study Location Information: (CSV)
Ecological Metadata Language: (EML)
1Air Temperature (Daily minimum and maximum) (Jan 12 2001 - Oct 11 2022)METADATADATA
Computed from fine temporal resolutions sensors.
2Fine temporal resolution (15-minute) air temperature and light intensity data (Jul 26 2002 - Jul 26 2019)METADATADATA
Raw data that has been flagged with the hja_hobo_clean Python program and, for a subset of sites, by visual inspection

 hja_hobo_clean Python program - The repository that hosts the code needed to process, flag and clean HOBO-collected data records from the H.J. Andrews Experimental Forest.
 Python flag definitions - Table of flags used in Python code for QA/QC of Hobo temperature and light sensors in the Andrews Forest.
 Sunrise-sunset table - Table by day of year for sunrise and sunset times in Pacific Daylight Time

 Meteorological data from benchmark stations at the HJ Andrews Experimental Forest, 1957 to present (MS001)
 Air and soil temperature data from the Reference Stand network at the Andrews Experimental Forest, 1971 to present (MS005)
 Air temperature at core phenology sites and additional bird monitoring sites in the Andrews Experimental Forest, 2009 to present (MS045)
 Upper Blue River (BRS) - temperature, precipitation, and snow collections (MS047)