Chemistry of freely-draining soil solutions at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present
TITLE
Chemistry of freely-draining soil solutions at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present
PRINCIPAL INVESTIGATOR(s)
Charles Driscoll
Dept. of Civil and Environmental Engineering
220 Hinds Hall
Syracuse, NY 13244
USA

Phone: (315)-443-2311
ABSTRACT:
Tension-free lysimeters were installed in three soil horizons at three locations adjacent to Hubbard Brook Experiment Forest Watershed 6. At each location, the organic horizon and the B horizon were selected for lysimeter placement. Soil solution samples were collected approximately monthly and analysed for base cations, soluble anions, trace metals, nitrogen and carbon.
KEYWORD SET: Hubbard Brook Ecosystem Study LTER
aluminum, ammonium, base cations, calcium, carbon, chemistry, chloride, dissolved inorganiccarbon, dissolved organic carbon, fluoride, forests, HBEF Watershed 6, HBR, Hubbard Brook LTER, leachate, lysimeter, magnesium, nitrate, nitrogen, potassium, silica, sodium, soil horizons, soil water, soil, sulfate, water, watersheds.
KEYWORD SET: LTER Core Research Areas
inorganic nutrients, organic matter.
BEGIN DATE
1984
END DATE
2014
LOCATION
Adjacent to HBEF watershed 6.
West bounding coordinate: -71.743462
East bounding coordinate: -71.735649
North bounding coordinate: 43.957001
South bounding coordinate: 43.949928
Location of 750m altitude spruce-fir-white beech zone (SFB) Lysimeters
West bounding coordinate: -71.739931
East bounding coordinate: -71.739931
North bounding coordinate: 43.957423
South bounding coordinate: 43.957423
Location of 600m altitude low-elevation hardwood zone (LH) Lysimeters
West bounding coordinate: -71.738842
East bounding coordinate: -71.738842
North bounding coordinate: 43.950622
South bounding coordinate: 43.950622
Location of 730m altitude high-elevation hardwood zone (HH) Lysimeters
West bounding coordinate: -71.741369
East bounding coordinate: -71.741369
North bounding coordinate: 43.954523
South bounding coordinate: 43.954523
LOCATION DESCRIPTION
Tension-free lysimeters are installed in the Oa, Bh and Bs horizons at 3 sites located adjacent to watershed 6 at elevations of 750m (spruce-fir-white beech zone; SFB), 730m (high elevation hardwood zone; HH) and 600m (low elevation hardwood zone; LH). Three replicate lysimeters were installed beneath the Oa and Bh horizons and within the Bs horizon at the HH and LH sites, and two replicate lysimeters were installed in each horizon at the SFB site.
SAMPLING DESIGN
The lysimeters were constructed from either polyethylene funnels filled with acid-washed silica sand that drain into 1-L polyethylene containers or rectangular polyethylene containers filled with acid-washed Teflon beads that drain into 2-L polyethylene bottles. At each site, lysimeters were carefully installed in the wall of excavated soil pits, immediately below the Oa and Bh horizons and within the lower Bs horizon. Soil pits were backfilled to prevent accumulation of water and to eliminate freezing during winter months. Soil solution samples are collected approximately monthly in acid-washed polyethylene bottles and refrigerated at 4oC.
REFERENCES
  • Dahlgren, R.A., and Driscoll, C.T. 1994. The effects of whole-tree clear-cutting on soil processes at the Hubbard Brook Experimental Forest, New Hampshire, USA. Plant Soil 158:239-262.
  • Dittman, J.A. Dynamics of Nitrogen and Dissolved Organic Carbon in a Forested Watershed at the Hubbard Brook Experimental Forest. Master of Science, Syracuse University.
  • Dittman, J.A., Driscoll, C.T., Groffman, P.M., and Fahey, T.J. 2007. Dynamics of nitrogen and dissolved organic carbon at the Hubbard Brook Experimental Forest. Ecology 88(5):1153-1166.
  • Driscoll, C.T., Fuller, R.D., and Simone, D.M. 1988. Longitudinal variations in trace metal concentrations in a northern hardwood forested ecosystem. J. Environ. Qual. 17(1):101-107.
  • Fuss, C.B. 2009. Biogeochemical dynamics of oxidized and reduced iron at the Hubbard Brook Experimental Forest. Masters of Science, Syracuse University.
  • Fuss, C.B., Driscoll, C.T., Johnson, C.E., Petras, R.J., and Fahey, T.J. 2011. Dynamics of Oxidized and Reduced Iron in a Northern Hardwood Forest. Biogeochemistry 104(1-3 (July)):103-119.
  • Johnson, C.E., Driscoll, C.T., Siccama, T.G., and Likens, G.E. 2000. Element fluxes and landscape position in a northern hardwood forest watershed ecosystem. Ecosystems 3:159-184.
  • Palmer, S.M. Spatial and temporal patterns in the biogeochemistry of aluminum at the Hubbard Brook Experimental Forest, New Hampshire. Dissertation, Syracuse University.
  • Palmer, S.M., Driscoll, C.T., and Johnson, C.E. 2004. Long-term trends in soil solution and stream water chemistry at the Hubbard Brook Experimental Forest: relationship with landscape position. Biogeochemistry 68(1):51-70.
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: (603) 726-8902
Email: hbr-im@lternet.edu

Data file: w6lysim.txt
Description: Soil solution chemistry at Hubbard Brook Experimental Forest adjacent to Watershed 6, measured with tension-free lysimeters
Notes on Data: DATA DESCRIPTION Between 1984 and 1986 and 1998-present, data are the arithmetic means for samples collected from individual lysimeters. From 1986 through 1998, data are for bulked soil solutions collected from replicate lysimeters. Current detection limits for the Driscoll laboratory: Na (0.015 umol/L), K (0.12 umol/L), Ca (0.030 umol/L), Mg (0.0032 umol/L), Alt (0.0026 umol/L), Alm (1.3 umol/L), Alo (1.3 umol/L), NH4 (0.55 umol/L), H4SiO2 (3 umol/L), Cl (0.55 umol/L), NO3 (0.85 umol/L), SO4 (0.53 umol/L), F (0.097 umol/L), DIC (20 umol/L), DOC (20 umol/L), TN (0.81 umol/L). It is suggested to dataset users to use a value of one half the detection limit when a value for a solute is less than the detection limit. The data is physically located at the Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY and was last updated in February, 2013.
ColumnVariableDescriptionUnitsCoded?Missing value label
1DateSample dateYYYY-MM-DDnnone
2WSWatershed identification numbernoneynone
3ElevElevationnoneynone
4HorSoil horizonnoneynone
5pHpH measurementdimensionlessn
-99.99
6ANCAcid Neutralizing CapacitymicroEquivalentPerLitern
-999.99
7H4SiO4Dissolved silica concentration in umol/LmicroMolePerLitern
-99999.9
8Na+Sodium concentration in umol/LmicroMolePerLitern
-999.9
9K+Potassium concentration in umol/LmicroMolePerLitern
-999.9
10Ca2+Calcium concentration in umol/LmicroMolePerLitern
-999.9
11CaFLAGNotes on calcium measurementsnoneynone
12Mg2+Magnesium concentration in umol/LmicroMolePerLitern
-999.9
13AltTotal aluminum concentration in umol/LmicroMolePerLitern
-999.9
14AlmTotal monomeric aluminum concentration in umol/LmicroMolePerLitern
-999.9
15AloOrganic monomeric aluminum in umol/LmicroMolePerLitern
-999.9
16NH4+Ammonium concentration in umol/LmicroMolePerLitern
-999.9
17F-Total fluoride concentration in umol/LmicroMolePerLitern
-999.9
18Cl-Chloride concentration in umol/LmicroMolePerLitern
-999.9
19SO4=Sulfate concentration in umol/LmicroMolePerLitern
-99999.9
20NO3-Nitrate concentration in umol/LmicroMolePerLitern
-99999.9
21DICDissolved inorganic carbon in umol/LmicroMolePerLitern
-99999.9
22DOCDissolved organic carbon in umol/LmicroMolePerLitern
-999999.9
23TNTotal nitrogen in umol/LmicroMolePerLitern
-99999.9

CODES

Variable: WS
Code
Description
6
Watershed 6
Variable: Elev
Code
Description
SFB
750m altitude spruce-fir-white beech zone
LH
600m altitude low-elevation hardwood zone; LH
HH
730m altitude high-elevation hardwood zone HH
Variable: Hor
Code
Description
Bh
Bh soil horizon
Bs
Bs soil horizon
Oa
Oa soil horizon
Variable: CaFLAG
Code
Description
Y
Flagged. Data currently being reanalysed. For informational purposes only.
N
No flag. Data analysis complete

MISSING VALUE CODES
Variable
Missing Value Code
Code Explanation
pH
-99.99
Data missing or not taken at this time
ANC
-999.99
Data missing or not taken at this time
H4SiO4
-99999.9
Data missing or not taken at this time
Na+
-999.9
Data missing or not taken at this time
K+
-999.9
Data missing or not taken at this time
Ca2+
-999.9
Data missing or not taken at this time
Mg2+
-999.9
Data missing or not taken at this time
Alt
-999.9
Data missing or not taken at this time
Alm
-999.9
Data missing or not taken at this time
Alo
-999.9
Data missing or not taken at this time
NH4+
-999.9
Data missing or not taken at this time
F-
-999.9
Data missing or not taken at this time
Cl-
-999.9
Data missing or not taken at this time
SO4=
-99999.9
Data missing or not taken at this time
NO3-
-99999.9
Data missing or not taken at this time
DIC
-99999.9
Data missing or not taken at this time
DOC
-999999.9
Data missing or not taken at this time
TN
-99999.9
Data missing or not taken at this time