Data Package Metadata View Summary

Longitudinal Stream Chemistry at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present

General Information

Data Package:
Local Identifier:	knb-lter-hbr.127.9
Title:	Longitudinal Stream Chemistry at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present
Alternate Identifier:	knb-lter-hbr.127
Abstract:	Longitudinal variation in streamwater chemistry has been measured in two watersheds (W1 and W6) at the Hubbard Brook Experimental Forest. This dataset includes samples that have been collected approximately monthly in Watershed 6 at six sampling locations (1982 – present) along an elevational gradient. Samples are analyzed for pH, ANC, anions, cations, nitrogen, dissolved inorganic and organic carbon. 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.
Short Name:	Stream Chem Longitudinal W6
Publication Date:	2019-03-03
Language:	English

Time Period

Begin:

1982-06-10

End:

2017-12-17

People and Organizations
Contact:	Information Manager (Hubbard Brook Ecosystem Study) [ email ]
Creator:	Driscoll, Charles T

Data Entities
Data Table Name:	HBEF Watershed 6 longitudinal stream chemistry
Description:	Longitudinal stream chemistry measurements at Watershed 6, Hubbard Brook LTER

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/knb-lter-hbr/127/9/548bcf37822124a7c7bb57507c4436c2
Name:	HBEF Watershed 6 longitudinal stream chemistry
Description:	Longitudinal stream chemistry measurements at Watershed 6, Hubbard Brook LTER
Number of Records:	1791
Number of Columns:	23

Table Structure

Object Name:

HBEF_1982-2017_Stream_Chem_W6.csv

Size:

244090 byte

Authentication:

20940af22682dd35805454b466cc8e52 Calculated By MD5

Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:

Table Column Descriptions

Date

Site

Elev

ANC

Na+

K+

Ca2+

CaFLAG

Mg2+

Alt

Alm

Alo

NH4+

F-

Cl-

SO4=

NO3-

DIC

DOC

Column Name:

Date

Site

Elev

ANC

Na+

K+

Ca2+

CaFLAG

Mg2+

Alt

Alm

Alo

NH4+

F-

Cl-

SO4=

NO3-

DIC

DOC

Definition:

Sample date

Watershed identification number

Site

Elevation of stream sampling location

pH measurement

Acid Neutralizing Capacity

Dissolved silica concentration in umol/L

Sodium concentration in umol/L

Potassium concentration in umol/L

Calcium concentration in umol/L

Notes on calcium measurements

Magnesium concentration in umol/L

Total aluminum concentration in umol/L

Total monomeric aluminum concentration in umol/L

Organic monomeric aluminum in umol/L

Ammonium concentration in umol/L

Total fluoride concentration in umol/L

Chloride concentration in umol/L

Sulfate concentration in umol/L

Nitrate concentration in umol/L

Dissolved inorganic carbon in umol/L

Dissolved organic carbon in umol/L

Total nitrogen in umol/L

Storage Type:

date

string

float

string

float

Measurement Type:

dateTime

nominal

interval

ratio

nominal

ratio

Measurement Values Domain:

Format	YYYY-MM-DD
Precision

Definition

any text

Definition

any text

Unit	meter
Precision	1
Type	whole

Unit	dimensionless
Precision	0.01
Type	real

Unit	microEquivalentPerLiter
Precision	0.1
Type	real

Unit	micromolePerLiter
Precision	3
Type	real

Unit	micromolePerLiter
Precision	0.015
Type	real

Unit	micromolePerLiter
Precision	0.12
Type	real

Unit	micromolePerLiter
Precision	0.03
Type	real

Definition

any text

Unit	micromolePerLiter
Precision	0.0032
Type	real

Unit	micromolePerLiter
Precision	0.0026
Type	real

Unit	micromolePerLiter
Precision	1.3
Type	real

Unit	micromolePerLiter
Precision	1.3
Type	real

Unit	micromolePerLiter
Precision	0.55
Type	real

Unit	micromolePerLiter
Precision	0.097
Type	real

Unit	micromolePerLiter
Precision	0.55
Type	real

Unit	micromolePerLiter
Precision	0.53
Type	real

Unit	micromolePerLiter
Precision	0.85
Type	real

Unit	micromolePerLiter
Precision	20
Type	real

Unit	micromolePerLiter
Precision	20
Type	real

Unit	micromolePerLiter
Precision	0.81
Type	real

Missing Value Code:

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Code	-999.99
Expl	Data missing, or not taken at this time
Code	-888.88
Expl	Sample volume too small for analysis
Code	-777.77
Expl	Analyte concentration below detection limit

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data ("Data User" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study.

While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is." The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
Hubbard Brook Ecosystem Study	HBEF Watershed 6, HBR, Hubbard Brook LTER
LTER Network Controlled Vocabulary	acid neutralizing capacity, aluminum, ammonium, calcium, carbon, chemistry, chloride, dissolved inorganic carbon, dissolved organic carbon, elevation, fluoride, forests, magnesium, nitrate, nitrogen, pH, potassium, silica, sodium, streams, sulfate, water, watersheds

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

SAMPLING DESIGN

Samples are collected along an elevation gradient in Watershed 6. Sampling began in 1982. Streamwater is collected approximately monthly at six sampling locations. Samples are collected in plastic bottles and returned to the laboratory for analysis of pH, ANC, cations, anions, dissolved carbon and nitrogen.

LABORATORY PROCEDURES

The pH of samples is measured potentiometrically with a glass electrode. The acid neutralizing capacity is measured using Gran titration with an auto-titrator. The major anions (SO42-, NO3-, Cl-, F-) are measured using ion chromatography. Prior to 2002, F- was measured with an ion-selective electrode. Base cations (Ca2+, Mg2+, Na+, K+), total Al, and H4SiO4 (as total dissolved Si) are measured using inductively coupled mass spectrometry (ICP-MS). Prior to 2004 the cations and total Al were measured using atomic absorption spectrometry (AA). Prior to 2006, the H4SiO4 concentration was measured colorimetrically. The ammonium and monomeric aluminum concentrations are measured colorimetrically. Total nitrogen (TN) is measured using combustion oxidation with chemiluminescence detection. Prior to 2006 TN was measured using a colorimetric method. Dissolved inorganic carbon (DIC) is analyzed using infrared detection. Dissolved organic carbon (DOC) is analyzed using infrared detection following persulfate oxidation.

NOTES ON DATA

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 are physically located at the Department of Civil and Environmental Engineering, Syracuse University, Syracuse, NY.

REFERENCES

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.

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.

People and Organizations

Publishers:

Organization:

Hubbard Brook Ecosystem Study

Address:

234 Mirror Lake Road,

North Woodstock, NH 03262 United States

Creators:

Individual:

Charles T Driscoll

Contacts:

Organization:

Hubbard Brook Ecosystem Study

Position:

Information Manager

Address:

234 Mirror Lake Road,

North Woodstock, NH 03262 United States

Email Address:

hbr-im@lternet.edu

Web Address:

https://hubbardbrook.org

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

1982-06-10

End:

2017-12-17

Geographic Region:

Description:

Hubbard Brook Experimental Forest Watershed 1

Bounding Coordinates:

Northern:	43.959356	Southern:	43.952121
Western:	-71.730866	Eastern:	-71.725832

Project

Other Metadata

Additional Metadata

additionalMetadata
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        |___element 'metadata'
        |     |___text '\n      '
        |     |___element 'unitList'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'id' = 'dimensionless'
        |     |     |     |  \___attribute 'name' = 'dimensionless'
        |     |     |     |  \___attribute 'unitType' = 'dimensionless'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'a designation asserting the absence of an associated unit'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'abbreviation' = 'm'
        |     |     |     |  \___attribute 'id' = 'meter'
        |     |     |     |  \___attribute 'multiplierToSI' = '1'
        |     |     |     |  \___attribute 'name' = 'meter'
        |     |     |     |  \___attribute 'unitType' = 'length'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'SI unit of length'
        |     |     |     |___text '\n        '
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |        \___attribute 'id' = 'microEquivalentPerLiter'
        |     |     |        \___attribute 'name' = 'microEquivalentPerLiter'
        |     |     |        \___attribute 'unitType' = 'NA'
        |     |     |___text '\n        '
        |     |     |___element 'unit'
        |     |     |     |  \___attribute 'constantToSI' = '0'
        |     |     |     |  \___attribute 'id' = 'micromolePerLiter'
        |     |     |     |  \___attribute 'name' = 'micromolePerLiter'
        |     |     |     |  \___attribute 'parentSI' = 'molePerMeterCubed'
        |     |     |     |  \___attribute 'unitType' = 'amountOfSubstanceConcentration'
        |     |     |     |___text '\n          '
        |     |     |     |___element 'description'
        |     |     |     |     |___text 'commonly used for concentration of some chemical constituents of natural water bodies, e.g., nutrients. It has the same magnitude as micromolar, but micromolar can only be used for a dissolved constituent'
        |     |     |     |___text '\n        '
        |     |     |___text '\n      '
        |     |___text '\n    '
        |___text '\n  '

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Data Package Metadata View Summary

Longitudinal Stream Chemistry at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present

Data Entities

Data Table

Data Package Usage Rights

Keywords

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Additional Metadata

Recently Added

Recently Updated

Data Package Metadata View Summary

Longitudinal Stream Chemistry at the Hubbard Brook Experimental Forest, Watershed 6, 1982 - present

+/- Data Entities

Data Table

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

+/- Additional Metadata

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Additional Metadata