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COMET Project Case Study Data on the WWW

Entry ID: COMET_CASE_STUDIES

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Summary

Abstract: The Cooperative Program for Operational Meteorology, Education and Training (COMET) was established in 1989 by NOAA and UCAR as a broad effort to affect meteorology education and training in the United States. Recently, COMET has been involved in efforts to enhance meteorological education in Universities and Meteorological Services throughout the world.

This archive was created to make COMET ...

Related URL

Link: GET DATA

Description: Link to COMET Case Study Data on the World Wide Web.

Geographic Coverage

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Spatial coordinates

N: 48.0

S: 25.0

E: -67.0

W: -125.0

Data Set Citation

Dataset Originator/Creator: NOAA, National Weather Service, University Corporation for Atmospheric Research

Dataset Title: COMET Project Case Study Data on the WWW

Dataset Release Place: Boulder, CO, USA

Dataset Publisher: University Coporation for Atmospheric Research

Online Resource: http://data.eol.ucar.edu/codiac/projs?COMET

Temporal Coverage

Start Date: 1993-03-11

Stop Date: 2002-01-30

Location Keywords

CONTINENT > NORTH AMERICA > UNITED STATES OF AMERICA

Science Keywords

ATMOSPHERE > ATMOSPHERIC PHENOMENA > CYCLONES

ATMOSPHERE > ATMOSPHERIC PHENOMENA > HURRICANES

ISO Topic Category

ENVIRONMENT

GEOSCIENTIFIC INFORMATION

INLAND WATERS

OCEANS

Project

NERR > National Estuarine Research Reserve

Quality ATTRIBUTE ACCURACY REPORT: Limits of Detection Method Detection Limits (MDL), the lowest concentration of a parameter that an analytical procedure can reliably detect, have been established by the University of Washington Marine Chemistry Laboratory. Table 1 lists the current MDL values, which are reviewed and revised periodically. Table 1. Method Detection Limits (MDL) for measured water quality ... parameters. Parameter Variable Range: Â¼M MDL Â¼M MDL mg/L MDL Â¼g/L Dates in use Ammonium NH4F 0-3 0.05 0.0007 2002 Nitrite NO2F 0-3 0.01 0.0001 2002 Nitrate+Nitrite NO23F 0-25 0.15 0.0021 2002 Orthophosphate PO4F 0-3 0.02 0.0006 2002 Silica SIF 0-50 0.21 0.0059 2002 Total Nitrogen TN 0-3 0.02 0.0006 2002 Total Nitrogen TN 0-25 0.38 0.0053 2002 Total Dissolved Nitrogen TDN 0-3 0.02 0.0006 2002 Total Dissolved Nitrogen TDN 0-25 0.38 0.0053 2002 Total Phosphorus TP 0-3 0.02 0.0006 2002 Total Phosphorus TP 0-25 0.38 0.0053 2002 Chlorophyll a, Phaeophtin1 CHLA PHEA 0.02 2002 Dissolved Organic Carbon2 DOC 0.1 2002 Total Suspended Solids3 TSS 0.1 2002 Particulate Organic Carbon4 POC 0.01 2002 Particulate Organic Nitrogen4 PON 0.001 2002 For all analyses requiring filtration, MDL is variable as detection limit is lowered with more filtration. Notes: 1 Fluorometric analysis performed on Turner model TD700. Published detection limit is the lowest extract concentration measurable. 2 Performed on Shimadzu TOC-5000 Total Organic Carbon Analyzer 3 Limited by balance used to weigh filters 4 Performed on CEC 440-SHA Elemental Analyzer (Leman Labs, Inc. currently supported by Exeter Analytical, Inc.). Reporting of Missing Data and Data with Concentrations Lower than Method Detection Limits Nutrient/Chla comment codes and definitions are provided in the following table. Missing data are denoted by a blank cell “ ” and commented coded with an “M”. Laboratories in the NERRS System submit data that are censored at a lower detection rate limit, called the Method Detection Limit or MDL. MDL’s for specific parameters are listed in the Laboratory Methods and Detection Limits Section (Section I, Part 12) of this document. Concentrations that are less than this limit are denoted by a –9999 and comment coded with a “B” in the variable code comment column. For example, the measured concentration of NO23F was 0.0005 mg/L as N (MDL=0.0008), the reported value would be -9999 with a “B” placed in the NO23F comment code column. Calculated parameters are comment coded with a “C” and if any of the components used in the calculation are below the MDL, the calculated variable is denoted by –9999 and also comment coded with a “B”. If a calculated value is negative, the value is reported as a -9999. Table 2: Variable Comment Codes Comment Code Definition A Value above upper limit of method detection B Value below method detection limit C Calculated value D Data deleted or calculated value could not be determined due to deleted data, see metadata for details H Sample held beyond specified holding time K Check metadata for further details M Data missing, sample never collected or calculated value could not be determined due to missing data P Significant precipitation (reserve defined, see metadata for further details) U Lab analysis from unpreserved sample S Data suspect, see metadata for further details QA/QC Programs Precision Field Variability – KBRR collects three successive grab samples for the determination of water mass variability. Laboratory Variability – none Inter-organizational splits – none Accuracy Sample Spikes – blanks Standard Reference Material Analysis – see lab protocols Cross Calibration Exercises - none LOGICAL CONSISTENCY REPORT: NACOMPLETENESS REPORT: Data collection period The first water samples for the SWMP nutrient monitoring program were collected February 20, 2002 at 13:00 and the last were collected on December 9, 2002 at 12:55. For grab samples typically only a starting time was recorded. It normally takes 20 minutes to collect the six samples –3 surface and 3 deep – at the Homer or Seldovia site. Location Sample type Date Start time End time Homer Grab 2/20 14:00 Homer DIEL 2/20 15:00 2/21 13:55 Seldovia Grab 2/21 11:00 Homer Grab 3/13 16:00 Homer DIEL 3/14 17:00 3/14 15:55 Seldovia Grab 3/14 11:00 Homer Grab 4/19 16:00 Homer DIEL 4/19 17:00 4/19 15:55 Seldovia Grab 4/22 11:00 Homer Grab 5/22 16:00 Homer DIEL 5/22 17:00 5/23 15:55 Seldovia Grab 5/23 11:00 Homer Grab 6/17 12:00 Homer DIEL 6/17 14:00 6/18 12:55 Seldovia Grab 6/18 11:00 Homer Grab 7/18 12:00 Homer DIEL 7/18 14:00 7/19 12:55 Seldovia Grab 7/19 10:00 Homer Grab 8/16 12:00 Homer DIEL 8/16 14:00 8/17 12:55 Seldovia Grab 8/17 10:00 Homer Grab 9/12 12:00 Homer DIEL 9/12 14:00 9/13 12:55 Seldovia Grab 9/13 10:00 Homer Grab 10/9 12:00 Homer DIEL 10/9 14:00 10/10 12:55 Seldovia Grab 10/10 10:00 Homer Grab 11/14 15:00 Homer DIEL 11/14 14:00 11/15 12:55 Seldovia Grab 11/15 12:00 Homer Grab 12/8 10:00 Homer DIEL 12/8 14:00 12/9 12:55 Seldovia Grab 12/9 12:00 LINEAGE/PROCESS STEP: PROCESS DESCRIPTION: Additional Description: Entry verification Data are transferred from individual monthly Excel spreadsheets provided by the analytical laboratory to a combined nutrients data sheet that covers the year. Data are checked to ensure that values are above the minimum detectable level. Data are run through the CDMO supplied nutrient rounding macro using the MDL levels to determine the appropriate number of decimal places to report the data to. PROCESS DATE: 20060223

Access Constraints Data collected in conjunction with the National Estuarine Research Reserve System's (NERRS) System-wide Monitoring Program (SWMP) is considered public information. Please see site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm

DISTRIBUTION LIABILITY:
Distribution NOAA/ERD retains the right to analyze, synthesize and publish summaries of the NERRS System-wide ...

Use Constraints The principal investigator (PI) listed in the enclosed metadata retains the right to be fully credited for having collected and processed the data. Please see the site for further information: http://cdmo.baruch.sc.edu/aboutdata.htm

Ancillary Keywords

nutrients

water quality

Data Set Progress

COMPLETE

Originating Center

Data Center

North Inlet-Winyah Bay Reserve, Baruch Marine Field Laboratory, Belle W. Baruch Institute for Marine and Coastal Sciences, University of South Carolina

Data Center URL: http://www.northinlet.sc.edu/

Data Center Personnel
Name: TAMMY D. SMALL Phone: (843) 546-6219 Fax: (843) 546-1632 Email: tammy at belle.baruch.sc.edu Contact Address: University of South Carolina Baruch Marine Field Laboratory P.O. Box 1630 City: Georgetown Province or State: South Carolina Postal Code: 29442 Country: USA