Citation:

Description:

National Atmospheric Depostion Program (NADP) data for 4 sites in North Carolina - those within or in close proximity to the Albemarle-Pamlico Estuary watershed. No Virginia sites are within this watershed. See included text files for file contents. Separate directories for each station. Annual summaries are as PDF files. Other files are in text format.

URLs/Downloads:

NADP_4NC.ZIP

Record Details:

Record Type:DATA SET

Product Published Date:12/31/1998

Record Last Revised:12/10/2002

Record ID: 16060

Show Additional Record Data

Access Procedures :http://www.epa.gov/eims/files/ord-nerl/nadp_4nc.zip

Data Elements:

Data Element :DATA COMPLETENESS CRITERIA

Data Type :CHARACTER

Data Element Description :several fields

Max Value Length :1

Data Element :ENDING DATE

Data Type :DATE

Data Element Description :ending date for samples

Max Value Length :10

Data Element :BEGINNING DATE

Data Type :DATE

Data Element Description :beginning date for samples

Max Value Length :10

Data Element :DAYS

Data Type :NUMBER

Data Element Description :number of days

Max Value Length :3

Data Element :RATIO

Data Type :NUMBER

Data Element Description :cations/anions)

Max Value Length :7

Data Element :FIELD MEANS

Data Type :NUMBER

Data Element Description :pH, cond. (microsiemens/cm)

Max Value Length :1

Data Element :LABORATORY MEANS

Data Type :CHARACTER

Data Element Description :Ca, Mg, K, Na, NH4, NO3, Cl, SO4, pH, Cond. (microsiemens/cm)

Max Value Length :7

Data Element :DATES

Data Type :DATE

Data Element Description :The beginning date of the first sample included in the summary period and the ending date of the last sample included in the summary period, reported in Greenwich Mean Time (GMT), mmddyy.

Max Value Length :1

Data Element :DAYS

Data Type :NUMBER

Data Element Description :Number of days included in the summary period.

Max Value Length :1

Data Element :VALID SAMP.

Data Type :NUMBER

Data Element Description :Numbers of samples used in calculating the precipitation-weighted mean concentrations for the summary period. These are the samples whose chemical measurements contribute to the deposition values.

Max Value Length :1

Data Element :% PPT REP. BY F CHEM.

Data Type :NUMBER

Data Element Description :The percentage of the total measured precipitation (Ppt)\represented by the hydrogen deposition calculated from field pH measurements. DATA USERS ARE URGED TO USE THIS VALUE TO ASSESS WHETHER THE FIELD HYDROGEN DEPOSITION, H(FIELD), IS ADEQUATE FOR AN INTENDED APPLICATION. The NADP requires this percentage to be >= 49.5 in its standard applications of field deposition data (e.g., published maps and data summary tables); however, data users may wish to select a different cut-off value, depending upon the intended application of the data. Note that H(field) is reported regardless of whether this criterion is met. In most cases, Data Completeness Criterion 3 is equal to the percentage of precipitation represented by the depositions calculated from laboratory (CAL) measurements. Precipitation amounts from sampling intervals during which < 0.01 inch of precipitation occurred are included in the Criterion 3 percentage, if less than 10 mL of sample was collected. Complete laboratory analyses are not performed on such samples. Therefore, the percentage of precipitation represented by the laboratory means is sometimes over-estimated by Criterion 3. Data users may contact the Coordination Office for more information.

Max Value Length :1

Data Element :PPT

Data Type :NUMBER

Data Element Description :Total amount of precipitation, in centimeters, measured by the rain gage during the summary period. This value includes precipitation amounts calculated from the sample volumes in cases where the weekly rain gage measurements were unavailable.

Max Value Length :1

Data Element :SVOL

Data Type :NUMBER

Data Element Description :Total volume, in milliliters, of precipitation collected by the sampler for VALID samples during the summary period.

Max Value Length :1

Data Element :DEPOSITIONS

Data Type :NUMBER

Data Element Description :total depositions in kilograms per hectare of Ca, Mg, K, Na, NH4, NO3, Inorg. N, Cl, SO4, H (lab), H (field)

Max Value Length :7

Data Element :PERIOD

Data Type :CHARACTER

Data Element Description :depending upon file, may be year, season, week, or date

Max Value Length :1

Geographic Areas:

Title :NATIONAL ATMOSPHERIC DEPOSITION PROGRAM (NADP), 4 NC SITES

Version :1.0

State :NC