Hubbard Brook Experimental Forest (US Forest Service): Soil Frost Measurements, 1955 - present
TITLE
Hubbard Brook Experimental Forest (US Forest Service): Soil Frost Measurements, 1955 - present
PRINCIPAL INVESTIGATOR(s)
John Campbell
USDA Forest Service
271 Mast Rd.
Durham, NH 03824
USA

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

Phone: (603) 726-8902
ABSTRACT:
Soil frost measurements have been collected approximately weekly during the winter season using transect s adjacent to the established network of standard rain gages from 1956 to the present. Soil frost data is collected in conjunction with snow depth measurements along each snow course. The ground is probed with a ski pole to detect the presence or absence of frost at 2 points adjacent to each of the 10 snow sample points. At the first 2 points for which frost is detected, the soil is excavated and frost thickness is measured. Data from one course are averaged for each collection date.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
frost, HBR, Hubbard Brook LTER, soil, soil frost, transect, water, watersheds, winter.
BEGIN DATE
1955-12-05
END DATE
2015-04-27
LOCATION
Rain gage 2
West bounding coordinate: -71.727002
East bounding coordinate: -71.727002
North bounding coordinate: 43.954988
South bounding coordinate: 43.954988
Elevation
Minimum: 1840
Maximum: 1840
(Unit: foot)
Rain gage 9
West bounding coordinate: -71.741829
East bounding coordinate: -71.741829
North bounding coordinate: 43.955749
South bounding coordinate: 43.955749
Elevation
Minimum: 2500
Maximum: 2500
(Unit: foot)
Rain gage 17
West bounding coordinate: -71.758228
East bounding coordinate: -71.758228
North bounding coordinate: 43.919026
South bounding coordinate: 43.919026
Elevation
Minimum: 2930
Maximum: 2930
(Unit: foot)
Rain gage 19
West bounding coordinate: -71.759351
East bounding coordinate: -71.759351
North bounding coordinate: 43.92934
South bounding coordinate: 43.92934
Elevation
Minimum: 1950
Maximum: 1950
(Unit: foot)
Headquarters (HQ)
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
Frost data are collected near the rain gages that are designated as snow course sites and are numbered according to the rain gage. The presence or absence of frost in the ground is checked at two points adjacent to each snow course point by probing with a ski pole. The percentage of total probe locations having frost is recorded for each snow course. At the first two snow points that have frost, a hole is dug into the soil and the depth of the frost is measured and recorded. The two depths are averaged. Stations 2 and 17 are presented from 1956 to the present because they have the longest continuous record and are representative of mid-elevation south-facing and high-elevation north-facing slopes. Frost data for stations 9, 19 and HQ begins in 1994. This file gives the percent of points having frost, and the average frost depth in inches. Notes on miscellaneous frost measurements are included. Prior to 1970 frost measurement was sporatic and the general impression was that there was none. Data for these years should be used with caution. The number of frost points sampled has also varied over the years; data is reported as percent and average depth.
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.
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.

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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: frost.txt
Description: Soil frost data at Hubbard Brook LTER
Notes on Data: The data is physically located at the USDA Forest Service, Durham, NH and was last updated March 2013.
ColumnVariableDescriptionUnitsCoded?Missing value label
1DATESample dateYYYY-MM-DDnnone
2WINTERThe year in which most of the snow-covered period fallsYYYYnnone
32_PTS_%Percentage of of points with frost at SRG2 locationdimensionlessn
-9
42_DEPTH_INDepth of frost at SRG2 locationinchn
-9.9
517_PTS_%Percentage of of points with frost at SRG17 locationdimensionlessn
-9
617_DEPTH_INDepth of frost at SRG17 locationinchn
-9.9
719_PTS_%Percentage of of points with frost at SRG19 locationdimensionlessn
-9
819_DEPTH_INDepth of frost at SRG19 locationinchn
-9.9
99_PTS_%Percentage of of points with frost at SRG19 locationdimensionlessn
-9
109_DEPTH_INDepth of frost at SRG9 locationinchn
-9.9
11HQ_PTS_%Percentage of of points with frost at HQ locationdimensionlessn
-9
12HQ_DEPTH_INDepth of frost at HQ locationinchn
-9.9
13COMMENTSComments and field notesnoneynone

CODES

Variable: COMMENTS
Description:
A short comment describing the data point. Value is blank if no comment is given.

MISSING VALUE CODES
Variable
Missing Value Code
Code Explanation
2_PTS_%
-9
Data missing or not taken at this time
2_DEPTH_IN
-9.9
Data missing or not taken at this time
17_PTS_%
-9
Data missing or not taken at this time
17_DEPTH_IN
-9.9
Data missing or not taken at this time
19_PTS_%
-9
Data missing or not taken at this time
19_DEPTH_IN
-9.9
Data missing or not taken at this time
9_PTS_%
-9
Data missing or not taken at this time
9_DEPTH_IN
-9.9
Data missing or not taken at this time
HQ_PTS_%
-9
Data missing or not taken at this time
HQ_DEPTH_IN
-9.9
Data missing or not taken at this time