Hubbard Brook Experimental Forest (US Forest Service): Daily Solar Radiation Measurements, 1959 - present
TITLE
Hubbard Brook Experimental Forest (US Forest Service): Daily Solar Radiation Measurements, 1959 - present
PRINCIPAL INVESTIGATOR(s)
John Campbell
USDA Forest Service
271 Mast Rd.
Durham, NH 03824
USA

Phone: (603)-868-7643
OTHERS INVOLVED
Amey Bailey
USDA Forest Service, Hubbard Brook Experimental Forest
234 Mirror Lake Road
North Woodstock, NH 03262
USA

Phone: (603) 726-8902
ABSTRACT:
Daily solar radiation has been measured at Hubbard Brook Experimental Forest Headquarters since 1959, using several different sensors. Radiation was recorded continuously first by a Belfort pyranograph and later by a Weather Measure pyranograph. The pyranograph has been at its current Headquarter location since 1960 and before that at weather station 1, near weir 1. With the installation of the automatic weather station in 1981, a LiCor pyranometer was collocated with the pyranograph and used as the primary radiation sensor. The pyranograph operated until 2000 as a back up. Solar radiation is now sampled by the LiCor sensor once per minute and hourly and daily means are calculated by a Campbell CR-21 Data logger and reported in Mj/m2.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
climate, ecosystems, forests, HBR, Hubbard Brook LTER, solar radiation, weather.
BEGIN DATE
1959-01-01
END DATE
2009-12-31
LOCATION
Hubbard Brook Experimental Forest station headquarters
West bounding coordinate: -71.700975
East bounding coordinate: -71.700975
North bounding coordinate: 43.945733
South bounding coordinate: 43.945733
Elevation
Minimum: 830
Maximum: 830
(Unit: foot)
SAMPLING DESIGN
Daily solar radiation has been measured at HBEF Headquarters since 1959, using several different sensors. Solar radiation has been recorded continuously by a Belfort pyranograph and later by a Weather Measure pyranograph. The instrument has been at its current Headquarter location since 1960 and before that at weather station 1, near weir 1. With the installation of the automatic weather station in 1981, a LiCor pyranometer was collocated with the pyranograph and used as the primary radiation sensor. The pyranograph operated until 2000 as a back up. Solar radiation is now sampled by the LiCor sensor once a minute and hourly means are calculated by a Campbell CR-21 Data logger.
DATA DESCRIPTION
Solar radiation data are dumped hourly to a data storage module, which is changed and downloaded monthly. Where LiCor data are not available, pyranograph data have been used. The pyranograph chart is changed weekly. Because of rapid fluctuation, instantaneous readings cannot be obtained from the pyranograph on partly cloudy days. The pyranograph chart is digitized visually, using a digitizer, for each 2-hour increment throughout the day. Daily means are reported in Mj/m2.
REFERENCES
  • Bailey, A.S., Hornbeck, J.W., Campbell, J.L., and Eagar, C. 2003. Hydrometeorological database for Hubbard Brook Experimental Forest: 1955-2000. Gen. Tech. Rep. NE-305. 36 pp.Newtown Square, PA., U.S., USDA Forest Service Northeastern Research Station.
  • Molloy, J. 2013. An Analysis of the Sublimation at Hubbard Brook Experimental Forest. Masters of Science Thesis, Plymouth State University.
DATA ACCESS GUIDELINES
Data Use Policy



The re-use of scientific data has the potential to greatly increase communication, collaboration and synthesis within and among disciplines, and thus is fostered, supported and encouraged. Permission to use this dataset is granted to the Data User free of charge subject to the following terms:

1) Acceptable use. Use of the dataset will be restricted to academic, research, government or other not-for-profit professional purposes.

2) Redistribution. The data and metadata are provided for use by the Data User. The Data User will not redistribute the original Data Set or metadata to others without the explicit permission of the Principal Investigator.

3) Citation. It is considered a matter of professional ethics to acknowledge the work of other scientists. Thus, the Data User will properly attribute the Data Set in any publications or in the metadata of any derived data products that were produced using the Data Set. Citation should take the following general form: Creator, Year of Data Publication, Title of Dataset, Publisher, Dataset identifier.

Citation example: Holmes, R.T. 2012. Bird Abundances at Hubbard Brook (1969-2010) and on three replicate plots (1986-2000) in the White Mountain National Forest. Durham, NH. Hubbard Brook Data Archive [Database]. http://hubbardbrook.org/data/dataset.php?id=81 (23 July 2012)

4) Acknowledgment: The Data User should acknowledge any institutional support or specific funding awards referenced in the metadata accompanying this dataset in any publications where the Data Set contributed to its content. Acknowledgments should identify the supporting party, the party that received the support, and any identifying information such as grant numbers.

Acknowledgment example: Data on [topic] were provided by [name of PI] on [date]. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station, Newtown Square, PA. Significant funding for collection of these data was provided by [agency]-[grant number], [agency]-[grant number], etc.

5) Consultation and questions. Data users are strongly encouraged to consult with the Principal Investigator(s) who collected these data for further information. Also, when appropriate, Data Users should consider including the Principal Investigator as a collaborator and/or co-author in the use of these data.

6) Notification. The Data User will notify the Principal Investigator of any publication or derivative work based on the Data Set. The Data User will also provide the Principal Investigator and/or the administrator of the Hubbard Brook Ecosystem Study with a pdf or two reprints of any publication(s) resulting from use of the Data Set.

7) Disclaimer. While substantial efforts are made to ensure the accuracy of data and documentation contained in this Data Set, complete accuracy of data and metadata cannot be guaranteed. All data and metadata are made available "as is". The Data User holds all parties involved in the production or distribution of the Data Set harmless for damages resulting from its use or interpretation.

8) Terms of Agreement. By accepting this Data Set, the Data User agrees to abide by the terms of this agreement. The Data Owner shall have the right to terminate this agreement immediately by written notice upon the Data User's breach of, or non-compliance with, any of its terms. The Data User may be held responsible for any misuse that is caused or encouraged by the Data User's failure to abide by the terms of this agreement.



CONTACT PERSON

Information Manager, Hubbard Brook LTER
234 Mirror Lake Road
North Woodstock, NH 03262
USA

Phone: Phone: (603) 726-8902
Email: hbr-im@lternet.edu

Data file: rad.txt
Description: Solar radiation data for the Hubbard Brook LTER
Notes on Data: NOTES Although all sensors appear to have been within about +/- 5 percent of the true value, users should be aware that bias may exist in the radiation data and may change over time. There are no data available for the full year of 1965. The data is physically located at the USDA Forest Service, Durham, NH and was last updated in March 2013.
ColumnVariableDescriptionUnitsCoded?Missing value label
1DateSample dateYYYY-MM-DDnnone
2HQSolar radiation measured at HeadquartersmegaJoulePerSquareMetern
-99.99


MISSING VALUE CODES
Variable
Missing Value Code
Code Explanation
HQ
-99.99
Data missing or not taken at time