uid=HBR,o=LTER,dc=ecoinformatics,dc=org
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hbr0086
Mirror Lake Outlet Chem
Hubbard Brook Experimental Forest: Chemistry of Mirror Lake outlet streamwater 1967 - 2010
Gene E.
Likens
Cary Institute of Ecosystem Studies
2801 Sharon Turnpike
Millbrook
NY
12545
USA
(845) 677-5343
Hubbard Brook Experimental Forest
LTER
234 Mirror Lake Road
North Woodstock
NH
03262
USA
(603) 726-8902
http://www.hubbardbrook.org
2016
Numerous studies have been conducted on Mirror Lake since the mid-1960s, including extensive physical, chemical, biological, and paleoecological research (Likens 1985).
This data set includes concentrations (mg/L) in weekly collections of Mirror Lake Outlet streamwater samples for base cations, pH, ammonium, anions, and dissolved silica.
ammonium
calcium
chemistry
chloride
HBEF Mirror Lake Study
HBR
Hubbard Brook LTER
lake
magnesium
nitrate
pH
phosphate
potassium
profile
silica
sodium
sulfate
Hubbard Brook Ecosystem Study
LTER
inorganic nutrients
LTER Core Research Areas
Data Access Guidelines for Mirror Lake Datasets
We are happy to share these data on the chemistry of Hubbard Brook ecosystems. The public dissemination of these data that we have collected is a responsibility that we take very seriously. As stewards of these long-term data, our highest priorities are:
a. to maintain the integrity of these long-term data;
b. to allow adequate time for the analysis, quality assurance, and publication of results by principal investigators;
c. to acknowledge properly and responsibly the appropriate funding sources.
Therefore, it is HBES policy to make these data available on this web page two years after the date of collection. Also, in sharing these data with users like yourself, we ask that you adhere to the following guidelines as a matter of common courtesy and ethical responsibility:
1. Please inform us in advance of your interest and plans for use of these data (likensg@caryinstitute.org).
2. The sources of funding used to collect these data must be acknowledged properly. We will provide the appropriate information when we learn what data are being used.
3. We would like to review any manuscripts that utilize extensive amounts (e.g. multiple years) of these data. If data use is extensive, or if these data have not been published previously, it may be appropriate for us to be included as authors on publication that are generated given the additional requirements from us for analysis and interpretation.
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.
http://www.hubbardbrook.org/data/dataset.php?id=86
Outlet to Mirror Lake
-71.696076
-71.689735
43.945922
43.940460
1967-06-28
2010-06-07
Information Manager, Hubbard Brook LTER
234 Mirror Lake Road
North Woodstock
NH
03262
USA
(603) 726-8902
hbr-im@lternet.edu
http://www.hubbardbrook.org
Hubbard Brook Experimental Forest
LTER
234 Mirror Lake Road
North Woodstock
NH
03262
USA
(603) 726-8902
http://www.hubbardbrook.org
Hubbard Brook LTER
LOCATION DESCRIPTION
Collected from below the Mirror Lake dam, but above the USGS stream-gauging flume. The dam is a concrete and stone structure, with un-treated, wooden spillway boards, that remain in place year-round. Outflow from the lake over the dam varies from 1 to 1000 L/sec, depending on lake pool level and seasonal hydrology. Mirror Lake is 15 ha in size, 11 m deep, and an oligotrophic, clearwater, natural water body adjacent to HBEF.
Numerous studies have been conducted on Mirror Lake since the mid-1960s, including extensive physical, chemical, biological, and paleoecological research which are described in detail in the book: An Ecosystem Approach to Aquatic Ecology (Likens, 1985).
SAMPLING DESIGN
Samples are collected in acid-washed, deionized water-rinsed, polyethylene bottles, from water flowing over the spillway boards. The normal sampling interval is weekly, with more frequent samples taken at times of increased discharge. At low lake pool levels, samples may be taken from leakage through small gaps in the boards.
DATA DESCRIPTION
Concentrations (mg/L) in weekly streamwater samples. Base cations and pH are available since 1967. Ammonium, anions, and dissolved silica have been measured since 1970, and phosphate was routinely determined first in 1972, although some data are available for each solute prior to these dates.
Chemistry of precipitation, streamwater, and
lakewater from the Hubbard Brook Ecosystem Study: a
record of sampling protocols and analytical
procedures
D.C.
Buso
G.E.
Likens
J.S.
Eaton
2000
USDA Forest
Service, Northeastern Research Station Gen. Tech.
Rep. NE-275
USDA Forest Service
Newtown Square, PA
52 pp.
Nutrient dynamics
buso
likens
J.W.
LaBaugh
D.L.
Bade
2009
University of California Press.
T.C.
Winter
G.E.
Likens
Mirror Lake: Interactions among Air, Land and Water
69-203
Mirror Lake: its past, present and future?
likens
1972
english
Appalachia
39
2
23-41
An Ecosystem Approach to Aquatic Ecology: Mirror Lake and its Environment
likens
1985
Springer-Verlag New York, Inc.
516
Salinization of Mirror Lake by road salt
likens
buso
2010
english
Water, Air and Soil Pollution
205
205-214
ml-out
Mirror Lake chemistry of outlet streamwater data
ml-out.txt
ASCII
1
0
\r\n
column
0x2c
http://www.hubbardbrook.org/data/data_policy.php?target=ml-out.txt
uid=HBR,o=LTER,dc=ecoinformatics,dc=org
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Concentrations (mg/L) in weekly streamwater samples. Base cations and pH are available since 1967. Ammonium, anions, and dissolved silica have been measured since 1970, and phosphate was routinely determined first in 1972, although some data are available for each solute prior to these dates.
These samples are physically located at the Robert S. Pierce Laboratory Hubbard Brook Experimental Forest,
N. Woodstock, NH.
NOTE REGARDING NITRATE DATA: After careful and exhaustive inter- and intra-laboratory tests we determined that nitrate concentrations in stream water were no longer remaining stable after collection, as they had in the past (see Buso, Likens and Eaton 2000).
It is possible that the biological community in some streams of the HBEF has changed in recent years, affecting the nitrate concentration in complicated ways. While there was no systematic bias to the data, the situation occurred primarily during summer, when nitrate concentrations and streamflows are very low. Thus, we urge some caution in using the streamwater nitrate data collected since 2006, when nitrate stability was last confirmed. In 2013, new protocols were instituted to prevent decay of nitrate concentrations after collection and the problem has been resolved.
There is no evidence that nitrate concentrations in the long-term precipitation record have been affected.
ws
Watershed (designated as 70)
70
Watershed
yr
Year
YYYY
1 year
1967
mo
Month
M
1 month
1
12
dy
Day
d
1 day
1
31
Ca
calcium concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
Mg
magnesium concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
K
potassium concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
Na
sodium concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
NH4
ammonium concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
pH
pH
dimensionless
.01
real
-3.00
Data missing or not taken at this time
SO4
sulfate concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
NO3
nitrate concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
Cl
chloride concentration in mg/L
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
PO4
phosphate concentration in mg/L (soluble-reactive phosphate)
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
SiO2
silica concentration in mg/L (measured as silicate)
milligramPerLiter
.001
real
-3.000
Data missing or not taken at this time
unit of element concentration in streamwater