Stephen R. Springston (srs@bnl.gov) Started: 4/28/2014 Last Update: 6/15/2015 Data Acknowledgement: See www.arm.gov/publications/procedures All instruments and the platform were provided with funds from the American Recovery and Reinvestment Act. Program: GoAmazon IOP which for MAOS was conducted at the T3 site near Manacapuru, Amazonia, Brazil beginning ~2/1/2014. Platform: The MAOS-C (Mobile Aerosol Observing System-Chemistry). These file(s) contain(s) the CO data measured in MAOS-C (Mobile Aerosol Observing System-Chemistry). Data are reported at 1- resolution. All zero, calibration and non-operational periods have been removed (empty field or NAN). Instrument: These files contain the CO, N2O and H2O measurements made with a Los Gatos ICOS Analyzer. Air is sampled at 10-m AGL through a fast flow (~10 LPM) 1/2" o.d. PFA inlet. In MAOS C for GoAmazon, the fast-flow manifold was sleeved in a 2" flexible tube with a counterflow of warmer ambient air to prevent any condensation inside the structure. The inlet to the instrument is a 1/4" PFA tube off a tee in the inlet manifold. There is a 47-mm diam. Teflon filter in-line with the sample (Millipore LSWP04700, 5um LS) downstream of the calibration point. The instrument simultaneously measures all three species. A standard addition calibration of CO is normally done 2/day at 03:00 and 15:00. The standard addition is made to the trace-gas sampling manifold and the actual concentration depends on the combined flow rate of all instruments plus bypass flow. This has some variation, but provides an excellent confirmation of the instrument response. The N2O and H2O measurements have not been calibrated. File Structure: As follows convention, data are reported as tab-delimited ASCII files. Files are formatted such that they are self documenting. For each data row: Row 1: Filename Row 4 (col 1 only): ARM Climate Research Facility Row 5: SitePlatform Row 7: Last revised date Row 9: Instrument Row 13: Instrument Mentor/Affiliation Rows 14-19: Comments (operational conditions, calibrations, etc.) Rows 21-24: Constants (usually defined in Comments) Row 35: Column title Row 36: Column units line 1 Row 37: Column units line 2 Row 40: First row of data Data is given in an arbitrary number of columns. The first column is date/time Time - Time is reported in UTC as set by an NTP server. Following convention, the time is the beginning of the period. The parameter reported at this time is the average of all points >= the time and < the next time. Data are reported at 1- s resolution. All non-operational periods have been removed (empty field or NAN). Accuracy and Precision: Carbon Monoxide - Units: ppmv (uncorrected for water vapor), Precision: +/-0.002 ppmv (2 sigma @ 1s). Accuracy: greater of 0.002 ppmv or ~5% (Mentor estimate) Nitrous Oxide - Units: ppmv (uncorrected for water vapor), Precision: To be determined. Accuracy: To be determined. Water Vapor - Units: ppmv (uncorrected for water vapor), Precision: To be determined. Accuracy: To be determined. Notes: DQR 141010.1 - During the first IOP, the instrument displayed sporadic, step functions in N2O and H2O. The CO values appear unaltered and the CO standard additions showed consistent values. However, extensive conversations with the vendor led to changing the temperature sensor and replacing the hard drive (along with an updated software package). After that change on 2014-08-13, the unit began to periodically drop out on all three channels as of 2014-08-15 11:00. This went on until 2014-10-02 12:00 when the vendor was finally able to negotiate ARM network protocols and log into the system. Data between 2014-08-15 and 2014-10-02 should be considered suspect. DQR 141010.6 - During a filter change, a new Operator inadvertently used the impermeable blue spacer instead of the white Teflon filter. A drop in sample pressure was noted. The Mentor identified the problem and the filter was replaced. The affected period is 2014-10-05 19:04 to 2014-10-07 13:11. The data for this period are irrecoverable. Posting History 4/28/2014 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/GoAmazon/co mao_ReadMe_CO.docx (This file in Word) mao_ReadMe_CO.txt (This file in ASCII) maomaoscs1.co.01s.00.20140101.000000.m02.tsv maomaoscs1.co.01s.00.20140101.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140101.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140201.000000.m02.tsv maomaoscs1.co.01s.00.20140201.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140201.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140301.000000.m02.tsv maomaoscs1.co.01s.00.20140301.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140301.000000.m02.tsv.plots.pdf 10/12/2014 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO.docx (This file in Word) (revised) mao_ReadMe_CO.txt (This file in ASCII) (revised) maomaoscs1.co.01s.00.20140401.000000.m02.tsv maomaoscs1.co.01s.00.20140401.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140401.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140501.000000.m02.tsv maomaoscs1.co.01s.00.20140501.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140501.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140601.000000.m02.tsv maomaoscs1.co.01s.00.20140601.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140601.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140701.000000.m02.tsv maomaoscs1.co.01s.00.20140701.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140701.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140801.000000.m02.tsv maomaoscs1.co.01s.00.20140801.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140801.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20140901.000000.m02.tsv maomaoscs1.co.01s.00.20140901.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20140901.000000.m02.tsv.plots.pdf 11/13/2014 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20141113.docx (This file in Word) mao_ReadMe_CO_20141113.txt (This file in ASCII) Files of 1-Hz data and associated processing log files. maomaoscs1.co.01s.00.20141001.000000.m02.tsv maomaoscs1.co.01s.00.20141001.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20141001.000000.m02.tsv.plots.pdf 1/18/2015 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20150118.docx (This file in Word) mao_ReadMe_CO_20150118.txt (This file in ASCII) Monthly files of 1-Hz data as a tab-delimited text file, text processing log file(s) and associated pdf time series plots. maomaoscs1.co.01s.00.20141101.000000.m02.tsv maomaoscs1.co.01s.00.20141101.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20141101.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20141201.000000.m02.tsv maomaoscs1.co.01s.00.20141201.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20141201.000000.m02.tsv.plots.pdf 3/2/2015 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20150302.docx (This file in Word) mao_ReadMe_CO_20150302.txt (This file in ASCII) Monthly files of 1-Hz data as a tab-delimited text file, text processing log file(s) and associated pdf time series plots. maomaoscs1.co.01s.00.20150101.000000.m02.tsv maomaoscs1.co.01s.00.20150101.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20150101.000000.m02.tsv.plots.pdf maomaoscs1.co.01s.00.20150201.000000.m02.tsv maomaoscs1.co.01s.00.20150201.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20150201.000000.m02.tsv.plots.pdf 4/21/2015 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20150421.docx (This file in Word) mao_ReadMe_CO_20150421.txt (This file in ASCII) Monthly files of 1-Hz data as a tab-delimited text file, text processing log file(s) and associated pdf time series plots. maomaoscs1.co.01s.00.20150301.000000.m02.tsv maomaoscs1.co.01s.00.20150301.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20150301.000000.m02.tsv.plots.pdf 4/30/2015 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20150430.docx (This file in Word) mao_ReadMe_CO_20150430.txt (This file in ASCII) Monthly files of 1-Hz data as a tab-delimited text file, text processing log file(s) and associated pdf time series plots. Note: This month's files are a revision of the previous submission with identical data, but noting DQR D150327.13 maomaoscs1.co.01s.01.20150201.000000.m02.tsv maomaoscs1.co.01s.01.20150201.000000.m02.tsv.log.txt maomaoscs1.co.01s.01.20150201.000000.m02.tsv.plots.pdf 5/29/2015 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20150529.docx (This file in Word) mao_ReadMe_CO_20150529.txt (This file in ASCII) Monthly files of 1-Hz data as a tab-delimited text file, text processing log file(s) and associated pdf time series plots. maomaoscs1.co.01s.00.20150401.000000.m02.tsv maomaoscs1.co.01s.00.20150401.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20150401.000000.m02.tsv.plots.pdf 6/15/2015 Posting to: c1.xdc.arm.gov /incoming/AOS_QC/mao/co mao_ReadMe_CO_20150615.docx (This file in Word, renamed to mao_ReadMe_CO.docx) mao_ReadMe_CO_20150615.txt (This file in ASCII, renamed to mao_ReadMe_CO.txt) Monthly files of 1-Hz data as a tab-delimited text file, text processing log file(s) and associated pdf time series plots. maomaoscs1.co.01s.00.20150501.000000.m02.tsv maomaoscs1.co.01s.00.20150501.000000.m02.tsv.log.txt maomaoscs1.co.01s.00.20150501.000000.m02.tsv.plots.pdf mao_ReadMe_CO_150615.docx