NOAA Earth System Research Laboratory Global Monitoring Division Surface Ozone Network Documentation of surface ozone monitoring program Instrument specifications, Data quality, Data use, and station identification Introduction: This document has been written and designed for the users of data collected from the NOAA/OAR/ESRL/GMD Surface ozone monitoring network in collaboration with NCDC for the documentation and identification of this dataset. Data users are responsible for proper documentation and citation of the data. Surface level ozone is monitored by the Global Monitoring Division at 17 locations around the world. NOAA/OAR/ESRL/GMD is responsible for maintaining accurate data with minimal loss of data for scientific analysis and understanding. All data provided is collected using UV absorption monitoring technique following the Beer-Lambert law. 1.) Station Site Details 2.) Data Processing 3.) Calibration 4.) Read-me **1.) Surface Ozone Site Details Code Name Latitude Longitude Elevation (meters) Date of Active Site (year) Country ARH Arrival Heights, Antarctica -77.80 -166.78 50.0 1996-present Antarctica PCO Azores, Portugal 38.27 -28.19 2225 2011-present Portugal BAO Erie, Colorado 40.05 -105.00 1584.0 2008-present United States BAR Ragged Pt., Barbados 13.17 -59.46 45.0 1989-1995 Barbados BER Tudor Hill, Bermuda 32.27 -64.88 30.0 1988-1998, 2003-present Bermuda BRW Barrow, Alaska 71.32 -156.61 8.0 1973-present United States LDR Lauder, New Zealand 45.04 169.68 370.0 2003-present New Zealand MLO Mauna Loa, Hawaii 19.54 -155.58 3397.0 1973-present United States NWR Niwot Ridge C-1, Colorado 40.04 -105.54 3022.0 1990-present United States TUN Niwot Ridge, Colorado 40.05 -105.59 3538.0 2010-present United States SMO Cape Matatula, Samoa 14.23 -170.56 77.0 1975-present Samoa SPO South Pole, Antarctica -90.00 -24.80 2837.0 1975-present Antarctica SUM Summit, Greenland 72.57 -38.48 3238.0 2000-present Greenland THD Trinidad Head, California 41.05 -124.15 107.0 2002-present United States TIK Tiksi, Russia 71.6 -128.9 249.3 2009-present Russia WKT Moody, Texas 31.32 -97.33 260.0 2010-present United States WVR Weaverville, California 40.43 -122.56 612.9 2011-present United States Station Notes: July 31, 2014 Archive for Tiksi Russia Data will not be complete until station calibration has been completed Moody Texas Instrument failure, will be repaired 11/2014 and reinstalled for data archive Niwot Ridge and Tundra Lab Colorado 2014 data will be archived at the end of the calendar year **PICO, PORTUGAL DATA IS IN COLLABORATION WITH UNIVERSITY OF COLORADO INSTAAR **NIWOT RIDGE/TUNDRA LAB DATA IS IN COLLABORATION WITH UNIVERSITY OF COLORADO MOUNTAIN RESEARCH STATION **2.)Data Processing NOAA Earth Systems Research Laboratory Global Monitoring Division Surface Ozone Network Raw Data to Final Data Processing Data records collected at least every two weeks directly from TEI 49 Ozone Monitor 1.) Maintain all raw data files at NOAA/ESRL/GMD Home directory 2.) Process data for public view and use A.) Instrument spec check all data-All data must be in the acceptable measurement range for the following criteria: a.) Pressure (200-1000 mmHg) b.) Lamp Intensity (45000-150000 Hz) c.) Flow (0.4-1.6 LPM) d.) Lamp Temperature (50-60 Degrees C) e.) Bench Temperature (5-50 Degrees C) *All data that is not within operating parameters will be removed* B.) Apply NIST Traceable calibration coefficients Ozone = (Slope * ozoneraw) + Zero Offset C.) Quality check all data Analyze plots for individual outlier points for investigation. All removed data points are documented for future data users. D.) Average data into “user friendly” format 1 hour Average Files 5 minute Average files PNG Quick plot images E.) Re-format data for archival and long-term record format 3.) Archive Data (NCDC and WCDGG Formats) **3.) Surface Ozone Instrument Calibration Record NOAA Earth Systems Research Laboratory Global Monitoring Division Surface Ozone Network NOAA/NIST calibrations: NOAA provides full scale calibrations for ozone instruments with comparison to the NIST Traceable Ozone Standard (located in NOAA David Skaggs Research Center; Boulder, Colorado). The primary standard is used to generate ozone calibrations from 0-200ppbv and produce a linear regression equation for use calibrating raw ozone data. Station personnel are responsible for weekly or bi-weekly calibration checks to ensure the instrument is functioning as expected and no drift is being detected for the instrument calibration. The following calibration records are only the NOAA/NIST full scale calibrations listed by station, alphabetically. For information regarding station quick calibration checks, please contact Audra McClure (Audra.mcclure@noaa.gov 303-497-6823). Station Most recent date of calibration Instrument ID Slope Zero Goal Future Calibration Date ARH Arrival Heights Nov. 2011 1763 1.010 -0.09 Nov. 2016 BAO Erie, Colorado Sept. 2014 3711 .998 .793 Sept. 2019 BAO-300m Erie, Colorado Currently in lab for calibration 2b-707 Nov. 2019 BAR Barbados Sept. 2010 5580 1.031 -0.17 Sept. 2015 BER Bermuda Sept. 2010 2651 1.026 0.93 Sept. 2015 BRW Barrow, Alaska Jan. 2010 1764 1.018 0.46 Jan. 2015 LDR Lauder, New Zealand Jun. 2011 4531 1.029 0.51 Jun. 2016 MLO Mauna Loa, Hawaii Jan. 2010 3712 1.011 -1.32 Jan. 2015 NWR Niwot Ridge, C1 Colorado Jan. 2010 1766 1.032 1.63 Jan. 2015 PCO Pico, Portugal Apr. 2011 8899 1.011 0.98 Jan. 2016 SMO American Samoa Oct. 2010 3710 1.024 0.96 Oct. 2015 SPO South Pole Jan. 2010 1762 1.032 -0.10 Jan. 2015 SUM Summit Greenland Jan. 2010 1760 1.031 0.67 Jan. 2015 THD Trinidad Head, California Mar. 2009 1101 1.032 0.72 ASAP TUN Tundra Lab, Colorado Mar. 2013 1765 1.006 -0.32 Mar. 2018 WKT Moody, Texas Apr. 2009 8898 1.021 0.03 ASAP WVR Weaverville, California Jun. 2011 2653 1.020 1.32 Jun. 2016 **4.)Surface Ozone Read-me The following information describes the data format for the surface ozone mixing ratio data available on this directory. If you have questions please contact: Audra McClure-Begley: Audra.mcclure@noaa.gov (303-497-6823) Irina Petropavlovskikh: irina.petro@noaa.gov Please consult the following article in Atmospheric Environment for information on the stations and for referencing the data: Oltmans, SJ and Levy II, H, Surface ozone measurements from a global network, Atmos. Environ., 28, 9-24, 1994. Data Disclaimer: Data has undergone extensive quality checks and is available from NOAA-GMD and WDCGG. However, there still exists the potential for these data to be modified at the discretion of NOAA/ESRL Global Monitoring Division. Data Format The data are one-minute, five-minute, or hourly averaged files and are in UTC times (GMT). The data files have names that begin with a three-letter station identifier followed by the constituent, inlet height, averaging time (one and five minute are both designated by "min"), month, and year. Local Standard Time Files Local Standard Time (LST) files were created for user convenience and are zipped together for each year. The LST files have names that begin with “lst_”, the three letter station identifier, constituent, inlet height, and year. (Example: lst_wkt_o3_6m_2011.zip). The user can use 7Zip or a similar program to unzip the files. Once unzipped, the files have data formats as above. The file names are also similar as above, except with an “lst_” prefix. Station Identification: Site Code Station Number Location Station Notes ARH 324 Arrival Heights, Antarctica BAO 350 Erie, Colorado Co-located tower measurements BAR 334 Ragged Point, Barbados BER 333 Tudor Hill, Bermuda BRW 199 Barrow, Alaska LDR 256 Lauder, New Zealand MLO 031 Mauna Loa, Hawaii NWR 337 Niwot Ridge C-1, Colorado Mountain Research Station PCO 371 Azores, Portugal INSTAAR Collaboration SMO 191 Cape Matatula, American Samoa SPO 111 South Pole, Antarctica SUM 344 Summit, Greenland THD 345 Trinidad Head, California TIK 351 Tiksi, Russia TUN 347 Tundra Lab, Colorado Mountain Research Station WKT 348 Moody, Texas WVR 362 Weaverville, California