Details and Metadata
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Methods
The methods followed in the creation of the dataset, including description of field, laboratory and processing steps, and quality control procedures
Current Methods
Precipitation samples
Started: 1994-04-06Weekly collection of precipation for chemical analysis is performed at two different sites. Precipitation amount, pH and conductivity analysis is performed at the sites. The sample is shipped to the NADP Central Analytical Lab in Illinois for analysis of pH, conductivity, Ca, Mg, K, Na, NH4, NO3, Cl, SO4.
Ozone and deposition
Started: 1994-01-01Seasonal continuous ozone (May through September), averaged hourly. Deposition (kg/ha) was calculated for chemicals reporting concentration in mg/l for annual, seasonal and montly time steps.
Meteorological data
Started: 1994-01-01Continuous meteorology averaged hourly includes ambient temperature at 2 and 10 m height, relative humidity, surface wetness, precipitation, wind speed and direction, solar radiation.
Past Methods (No longer in use)
- Sample analysis
Started: 1995-07-04
Ended: 1999-02-02Accumulated weekly samples; analysis includes SO2, HNO3, pH, conductivity, acidity and major ions.
Dataset Fields
Detailed documentation of the fields comprising the dataset, including the type of measurement, units where applicable, and any controlled vocabularies or code lists present in the data
Field Name Caption Description Additional Information lab_key Lab ID Number Laboratory sample identification number
Measurement type: Nominal site_id Site ID Number Site identification code
Measurement type: Nominal type Sample Type Sample type code
Measurement type: Nominal
Type Code
+ showAppears in data as Meaning of code A Composite of day/night samples by lab at time of original submittal B Composite of day/night samples from DRYCHEM_DAYNIGHT C Continuous sample used for calculation Code Continuous sample used for calculation dateon Date Sampling Started Date and time sample collection began, Local Standard Time
Measurement type: DateTime
Date/Time Format: YYYY-MM-DD hh:mm:ssdateoff Date Sampling Ended Date and time sample collection ended, Local Standard Time
Measurement type: DateTime
Date/Time Format: M/DD/YYYY hh:mm:sstso4 Teflon Filter Sulphate Sulfate (SO4) concentration from Teflon filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001tso4_f TSO4 Data Flag Data quality code for TSO4
Measurement type: Nominal
DryChem
+ showAppears in data as Meaning of code NULL Null or missing value "#" Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed R Re-run value used in calculation S Both L and R flags apply U Value is less than detection limit tno3 Teflon Filter Nitrate Nitrate (NO3) concentration from Teflon filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001tno3_f TNO3 Data Flag Data quality code for TNO3
Measurement type: Nominal
tno3_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply tnh4 Teflon Filter Ammonium Ammonium (NH4) concentration from Teflon filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001tnh4_f TNH4 Data Flag Data quality code for TNH4
Measurement type: Nominal
QCo
+ showAppears in data as Meaning of code NULL Null or missing value "#" Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed R Re-run value used in calculation S Both L and R flags apply U Value is less than detection limit ca Teflon Filter Calcium Calcium (Ca) concentration from Teflon filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001ca_f CA Data Flag Data quality code for CA
Measurement type: Nominal
ca_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply mg Teflon Filter Magnesium Magnesium (Mg) concentration from Teflon filter ug/m^3
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001mg_f MG Data Flag Data quality code for MG
Measurement type: Nominal
mg_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply na Teflon Filter Sodium Sodium (Na) concentration from Teflon filter ug/m^3
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001na_f NA Data Flag Data quality code for NA
Measurement type: Nominal
na_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply k Teflon Filter Potassium Potassium (K) concentration from Teflon filter ug/m^3
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001k_f K Data Flag Data quality code for K
Measurement type: Nominal
k_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply nso4 Nylon Filter Sulfate Sulfate (SO4) concentration from Nylon filter ug/m^3
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001nso4_f NSO4 Data Flag Data quality code for NSO4
Measurement type: Nominal
nso4_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply nhno3 From Nylon Filter Nitric Acid Nitric acid (NO3) concentration from Nylon filter ug/m^3
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001nhno3_f NHNO3 Data Flag Data quality code for NHNO3
Measurement type: Nominal
nhno3_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply wso2 SO2 From Whatman Filter Sulfur dioxide (SO2) concentration from Whatman filter ug/m^3
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001wso2_f WSO2 Data Flag Data quality code for WSO2
Measurement type: Nominal
wso2_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume wno3 Whatman Filter Nitrate Nitrate (NO3) concentration from Whatman filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001wno3_f WNO3 Data Flag Data quality code for WNO3
Measurement type: Nominal
wno3_f Code
+ showAppears in data as Meaning of code # Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed NULL Valid data R Re-run value used in calculation S Both L and R flags apply U Undetected - value listed is the reporting limit corrected by flow volume "#" Both U and L flags apply total_so2 Total Sulfur Dioxide Calculated Concentration Total sulfur dioxide (SO2) concentration calculated from [WSO2]+0.667*[NSO4] Note W = Whatman filter and N = Nylon filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001total_no3 Total Nitrate Calculated Concentration Total nitrate (NO3) concentration calculated from [tno3]+0.9841*[nhno3] Note t=Teflon filter
Measurement type: Ratio
Unit: unavailable
Precision: 0.0001flow_volume Flow Volume Flow volume
Measurement type: Interval
Unit: unavailable
Precision: 0.0001flow_volume_f Flow Volume Data Flag Data quality code for FLOW_VOLUME
Measurement type: Nominal
QCo
+ showAppears in data as Meaning of code NULL Null or missing value "#" Both U and L flags apply I Invalid chemistry data and/or less than 75% valid flow data L Less than 90% but greater than or equal to 75% valid flow data M Missing or completely invalid flow data N Sample not analyzed R Re-run value used in calculation S Both L and R flags apply U Value is less than detection limit valid_hours Valid Hours Valid hours during sampling period
Measurement type: Nominal
Unit: unavailablevalid_hours_f Valid Hours Data Flag Data quality code for VALID_HOURS
Measurement type: Nominal
Valid Hours
+ showAppears in data as Meaning of code 32 Valid hours in sampling period hours 33 Flag for VALID_HOURS comment_codes Comment Codes Comment codes (separated by spaces)
Measurement type: Nominal
CommentsCodes
+ showAppears in data as Meaning of code 1 Unidentified debris/particles on filter 2 Torn; hole; ripped filter noted during unpacking 3 Excessively wet filter noted upon unpacking 4 Excessively dirty filter noted upon unpacking 5 Filter pack loose upon arrival; possible leakage during sampling period 6 Apparent solenoid problem 7 Filter pack end caps cracked/missing upon receipt 8 Outside of filter pack excessively dirty upon receipt 9 Support screen raised up 10 Insect inside filter pack; noted during unpacking 11 Laboratory accident 12 Filter pack on tower incorrect length of time 13 Filter pack not run in field 14 Unusual odor noticed during unpacking 15 Low extraction efficiency off filter 16 On/off dates and times are assumed 17 Filter given to EPA for analysis 18 Field accident 19 Field equipment problem 20 Filter used for special study 21 Forest fire/agricultural activity in area 22 Site closed 23 Sample report form not received with filter pack 24 Chain of custody incomplete or incorrect 25 Filter pack run out of sequence 26 Suspect value; reason not recorded N Numeric code following applies to the Nylon filter analysis T Numeric code following applies to the Teflon filter analysis W Numeric code following applies to the Whatman filter analysis qa_code QA Code Quality assurance level of the record. (see QAPP for definition of quality assurance levels)
Measurement type: Nominal
qa Codes
+ showAppears in data as Meaning of code d Dateon or dateoff questionable L1 Level 1 validated data L2 Level 2 validated data x Data quality issue has been identified and will be resolved in future update Sampling Equipment
Equipment and software used to collect data, including how that equipment was used.
No sampling equipment recorded for this dataset
Site Characteristics
The spatial extent of the dataset site coverage, and descriptions of the spatial extent and context for the data collection
- Site Description
Green Mountain National Forest, Stratton, just south of the Lye Brook Wilderness Area boundary. Summit of hill with southwest airflow.