{EML Metadata} {Description of the Data file structure is available at the Niwot Ridge LTER Data page}

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The documentation section of this file was developed from the NWT LTER Data
Directory (Symphony files DDABSTRA.WR1, DDDOCUME.WR1, DDMASTER.WR1,
DDVARIAB.WR1; last updated 16 December 1991) by Susan Kindig and Rick
Ingersoll in mid February 1993.[RCI 3 March 1993] This file was put under 
sccs control on 30 March 1993. See the appropriate history file for 
additional log information.[RCI 30 March 1993] Entry for 1993 data summary
was added to the citations section on 10 August 1994.[RCI 10 August 1994]
A reference to the NADP World Wide Web server was added, and the
contact email address and phone number were updated.[MAH 22 January 1996]

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TITLE. National Atmospheric Deposition Program.

ABSTRACT. Two NADP sites, located at 2524 m elevation in upper montane forest 
(Sugarloaf = CO94) and 3525 m in elevation and in alpine tundra (Niwot Ridge 
Saddle = CO02), collected precipitation samples on a weekly basis. These were 
analyzed for pH, conductivity, anions (Cl-, SO4--, NO3-), and cations (Ca++, 
Mg++, K+, Na+, NH4+, H+) at the Central Analytical Laboratory in Champaign, IL.

INVESTIGATOR. Mark Losleben, INSTAAR, CB 450, University of Colorado, Boulder,
CO, 80309-0450, (303) 492-8841, markl@culter.colorado.edu.

VARIABLES. pH, conductivity, Cl-, SO4--, NO3-, Ca++, Mg++, K+, Na+, NH4+,
H+.

KEYWORDS. acidic, anions (Cl-, SO4--, NO3-), cations (Ca++, Mg++, K+, Na+, NH4+, H+), conductivity, dry deposition, pH, pollution, precipitation, wet deposition, Biogeochemistry, Atmospheric Inputs, disturbance.

LOCATION. Study sites were the Saddle (COO2) and Sugarloaf (CO94). Samples 
are stored at Central Analytical laboratory, Champaign, IL. Original data 
are available via ftp at sporobolus@nrel.colostate.edu.

TIMING. 5 June 1984, ongoing, weekly.

CITATIONS. [1]National Atmospheric Deposition Program. 1985. Precipitation 
chemistry second quarter, 1984. NADP/NTN Data Report, Vol. VII, No. 2. 
Fort Collins, CO: Natural Resource Ecology Laboratory, Colorado State 
University. 323 pp.
[2]National Atmospheric Deposition Program. 1986. Precipitation chemistry 
third quarter, 1984. NADP/NTN Data Report, Vol. VII, No. 3. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 347 pp.
[3]National Atmospheric Deposition Program. 1986. Precipitation chemistry 
fourth quarter, 1984. NADP/NTN Data Report, Vol. VII No. 4. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 365 pp.
[4]National Atmospheric Deposition Program. 1986. Precipitation chemistry in 
the United States, 1984. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 240 pp.
[5]National Atmospheric Deposition Program. 1987. Precipitation chemistry 
1 January-30 June, 1985. NADP/NTN Data Report, Vol. VIII, No. 1. Fort Collins, 
CO: Natural Resource Ecology Laboratory, Colorado State University. 202 pp.
[6]National Atmospheric Deposition Program. 1987. Precipitation chemistry 
1 July-31 December, 1985. NADP/NTN Data Report, Vol. VIII, No. 2. Fort Collins,
CO: Natural Resource Ecology Laboratory, Colorado State University. 208 pp.
[7]National Atmospheric Deposition Program. 1987. Precipitation chemistry in 
the United States, 1985. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 340 pp.
[8]National Atmospheric Deposition Program. 1987. Precipitation chemistry 
1 January-30 June, 1986. NADP/NTN Data Report, Vol. IX No. 1. Fort Collins, 
CO: Natural Resource Ecology Laboratory, Colorado State University. 210 pp.
[9]National Atmospheric Deposition Program. 1987. Precipitation chemistry 
1 July-31 December, 1986. NADP/NTN Data Report, Vol. IX No. 2. Fort Collins, 
CO: Natural Resource Ecology Laboratory, Colorado State University. 216 pp.
[10]National Atmospheric Deposition Program. 1987. Precipitation chemistry in 
the United States, 1986. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 363 pp.
[11]National Atmospheric Deposition Program. 1988. Precipitation chemistry 
1 January-30 June, 1987. NADP/NTN Data Report, Vol. X No. 1. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 217 pp.
[12]National Atmospheric Deposition Program. 1988. Precipitation chemistry 
1 July-31 December, 1987. NADP/NTN Data Report, Vol. X No. 2. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 216 pp.
[13]National Atmospheric Deposition Program. 1988. Precipitation chemistry in 
the United States, 1987. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. ? pp.
[14]National Atmospheric Deposition Program. 1988. Precipitation chemistry 
1 January-30 June, 1988. NADP/NTN Data Report, Vol. XI No. 1. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 216 pp.
[15]National Atmospheric Deposition Program. 1989. Precipitation chemistry 
1 July-31 December, 1988. NADP/NTN Data Report, Vol. XI No. 2. Fort Collins, 
CO: Natural Resource Ecology Laboratory, Colorado State University. 220 pp.
[16]National Atmospheric Deposition Program. 1989. Precipitation chemistry in 
the United States, 1988. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 379 pp.
[17]National Atmospheric Deposition Program. 1990. Precipitation chemistry in 
the United States, 1989. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 482 pp.
[18]National Atmospheric Deposition Program. 1991. Precipitation chemistry in 
the United States, 1990. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 475 pp.
[19]National Atmospheric Deposition Program. 1992. Precipitation chemistry in 
the United States, 1991. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 475 pp.
[20]National Atmospheric Deposition Program. 1993. Precipitation chemistry in
the United States, 1992. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 480 pp.
[21]National Atmospheric Deposition Program. 1994. Precipitation chemistry in
the United States, 1993. NADP/NTN Annual Data Summary. Fort Collins, CO:
Natural Resource Ecology Laboratory, Colorado State University. 465 pp.

COMMENTS. Data in electronic form are available via anonymous ftp and via
the World Wide Web from the Natural Resource Ecology Laboratory in Fort 
Collins, CO. The data in this location are the most up-to-date at any given 
time and may include changes to older hard-copy reports. Therefore, the 
data are not kept in this file.  See the "data" section below for instructions 
on accessing the data.

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statistical

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{*********************************************************************

If the data section below contains no data then you will need to 
obtain permission from the investigator listed in the documentation 
section of this file. If you have obtained permission or if the data 
are already contained in this file, include the following 
acknowledgment (in addition to an acknowledgment of the investigator)
in any published use of these data: "Logistical support 
and/or data were provided by the Niwot Ridge Long-Term Ecological 
Research project (NSF DEB 0423662) and the Mountain Research Station 
(BIR 9115097)." Please send 4 reprints or high-quality copies of any
such publications to Todd Ackerman, NWT LTER data manager, 
INSTAAR, CB 450, University of Colorado, Boulder, CO, 80309-0450.
The data contained in these files have many sources. Generally,
data collected prior to 1993 would have been subjected to quality
control standards imposed by the investigator. Data after 1992 
were likely to have been manually entered and/or processed in the
NWT LTER central data management laboratory. Detailed information
on the quality control protocols and programs associated with any
data routed through the NWT LTER data management laboratory will 
be supplied upon request. The user of these data should be aware
that, while efforts have been taken to ensure that these data are 
of the highest quality, there is no guarantee of perfection for
the data contained herein and the possibility of errors exists.
If you encounter questionable data, please contact the NWT LTER
data manager (todda@culter.colorado.edu; (303) 492-4771) so that
the data can be corrected or qualified. Thus, these data should
be considered dynamic in that past data may be modified and future
data will be appended.

******************************************************************}

\data

{Data can be downloaded directly from the NADP World Wide Web server
at http://nadp.sws.uiuc.edu/nadpdata/state.asp?state=CO.