52,1001 Stephens, Britton National Center for Atmospheric Research Medusa Whole Air Flask Sampler ATom 1,1 2017,2,1,2021,1,21 0 Start_UTC, seconds 16 1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0,1.0 -99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999 Stop_UTC, seconds, time when flask was closed Mean_UTC, seconds, kernel-weighted representative sampling time position, integer, order of flasks taken (1-32) upstream_pressure, torr, kernel-weighted pressure reading at upstream pressure controller downstream_pressure, torr, kernel-weighted pressure reading at downstream pressure controller bypass_pressure, torr, kernel-weighted pressure of bypass line sample_pressure, torr, kernel-weighted representative pressure in sampling line flow, L/min, kernel-weighted representative mean flow during sampling flask_pressure, torr, fill pressure of each flask O2N2_MED, per meg, deviations in the ratio of O2 to N2 on the Scripps O2 Laboratory O2 Scale ArN2_MED, per meg, deviations in the ratio of Ar to N2 on the Scripps O2 Laboratory Argon Scale O2N2star_MED, per meg, deviations in the ratio of O2 to N2 with thermal artifacts and variations due to air-sea exchange caused by solubility changes removed CO2_MED, ppm, dry air mole fraction of CO2 on Scripps O2 Laboratory CO2 Scale d13CO2_MED, per mil, deviation in the 13C/12C Stable Carbon Isotope Ratio in CO2 relative to Vienna Pee Dee Belemnite d18OCO2_MED, per mil, deviation in the 18O/16O Stable Oxygen Isotope Ratio in CO2 relative to Vienna Pee Dee Belemnite D14CO2_MED, per mil, deviation from the Modern standard 14C/C ratio 0 22 PI_CONTACT_INFO: stephens@ucar.edu PLATFORM: NASA DC-8 aircraft LOCATION: DC-8 location data available at http://espoarchive.nasa.gov/archive/fileinfo/MMS-FlightPath_DC8_20160712.ict ASSOCIATED_DATA: See http://espoarchive.nasa.gov/archive/browse/atom UNCERTAINTY: N/A INSTRUMENT_INFO: N/A DATA_INFO: N/A DM_CONTACT_INFO: stephens@ucar.edu PROJECT_INFO: N/A ULOD_FLAG: -7777 ULOD_VALUE: N/A LLOD_FLAG: -8888 LLOD_VALUE: N/A STIPULATIONS_ON_USE: Until made public, only the ATom science team is allowed to use this data, per the ATom data protocol. OTHER_COMMENTS: Data are start and stop times for individual flask samples taken with Medusa. The Mean_UTC variable is the representative time of each sample as calculated with an averaging kernel. See Bent 2014 (PhD thesis, UCSD) for details. All pressure variables are measured in situ during sampling except for flask_pressure, which is the final pressure of the flask measured during analysis. In each flask the O2/N2 ratio and the Ar/N2 ratio are measured. An altitude-dependent fractionation correction using d(Ar/N2) is applied to d(O2/N2) to produce O2N2star_MED. Note that the CO2 mole fraction is reported on the Scripps Institution of Oceanography O2 Program CO2 Scale. CO2 is extracted after CO2 and O2/N2 content analysis for later isotope analysis. REVISION: R4 R4: updated R3: updated R2: updated R1: updated R0: final data. Start_UTC,Stop_UTC,Mean_UTC,position,upstream_pressure,downstream_pressure,bypass_pressure,sample_pressure,flow,flask_pressure,O2N2_MED,ArN2_MED,O2N2star_MED,CO2_MED,d13CO2_MED,d18OCO2_MED,D14CO2_MED 72758,72969,72932,1,175,533,780,766,2321,730,-667.43,11.15,-666.41,410.38,-8.903,0.173,-99999 72976,73989,73951,2,174,532,749,761,2293,726,-649.13,5.6,-646.64,408.31,-99999,-99999,-99999 73995,75409,75370,3,177,533,779,747,2260,713,-645.75,-12.55,-638.44,407.68,-8.762,-0.556,-99999 75605,77064,77025,4,170,531,755,738,2248,710,-673.49,10.27,-672.24,411.51,-99999,-99999,-99999 77070,77592,77553,5,170,531,782,740,2243,711,-696.97,-7.6,-690.98,414.58,-99999,-99999,-99999 77598,77877,77838,6,170,531,779,744,2273,715,-668.68,-14.71,-660.8,410.4,-99999,-99999,-99999 77884,78314,78275,7,170,531,787,741,2292,712,-648.12,-13.55,-640.55,408.26,-8.753,0.741,-99999 78320,79727,79682,8,140,610,783,723,1936,722,-646.03,-32.65,-633.39,407.14,-8.718,0.598,-99999 79733,80426,80380,9,140,610,778,718,1908,-99999,-99999,-99999,-99999,-99999,-99999,-99999,-99999 80433,81053,81013,10,170,531,774,732,2254,712,-684.56,-12.94,-677.15,412.02,-8.987,0.08,-99999 81059,81574,81535,11,170,531,780,750,2302,723,-658.29,-6.27,-652.65,408.97,-8.818,0.488,-99999 81580,81901,81863,12,170,531,791,748,2320,722,-657.02,-3.04,-652.23,408.26,-8.791,0.448,-99999 81908,83268,83222,13,140,610,783,726,1940,749,-660.65,-30.87,-648.48,413.48,-9.189,0.35,-99999 83274,84344,84298,14,140,610,777,718,1911,724,-645.84,-1.83,-641.38,408.6,-8.785,0.438,-99999 84350,85004,84964,15,170,531,776,748,2249,731,-670.83,1.19,-667.17,410.51,-8.885,-0.71,-99999 85010,85724,85685,16,170,531,785,749,2326,726,-643.54,-3.37,-638.67,407.66,-8.745,0.7,-99999 85735,86464,86426,17,170,531,794,786,2320,733,-655.46,-11.39,-648.46,407.49,-8.742,0.384,-99999 86475,88331,88292,18,170,531,816,808,2264,763,-678.91,-7.96,-672.82,410.47,-8.86,0.296,-99999 88342,88782,88743,19,170,531,803,807,2296,740,-663.28,-0.84,-659.08,409.27,-8.854,0.188,-99999 88793,89101,89063,20,170,531,805,805,2315,731,-642.64,-1.53,-638.26,407.61,-8.719,0.658,-99999 89112,90036,89993,21,140,610,807,764,1950,733,-633.22,-12.07,-626.04,406.46,-8.692,0.696,-99999 90047,91311,91265,22,140,610,788,753,1915,729,-671.04,-6.3,-665.39,409.74,-8.865,0.113,-99999 91322,91726,91687,23,170,531,782,784,2272,725,-665.82,-4.12,-660.75,409.47,-99999,-99999,-99999 91737,92047,92008,24,170,531,798,788,2307,727,-656.34,-3.48,-651.44,409.71,-8.765,0.862,-99999 92058,92611,92573,25,170,531,808,793,2334,732,-642.2,5.54,-639.69,406.62,-8.672,0.833,-99999 92622,93788,93743,26,140,610,802,759,1954,733,-633.48,-11.41,-626.47,406.69,-8.647,0.587,-99999 93799,94829,94790,27,170,531,791,777,2275,427,-99999,-99999,-99999,-99999,-99999,-99999,-99999 94840,95571,95532,28,170,531,800,792,2330,732,-623.99,13.17,-623.5,406.07,-8.633,1.09,-99999 95582,96266,96228,29,169,531,807,795,2347,731,-616.07,-5.57,-610.61,404.95,-8.597,0.724,-99999 96277,97915,97877,30,170,531,807,784,2293,727,-619.18,11.05,-618.13,405.95,-8.639,0.981,-99999 97926,99069,99030,31,170,531,810,790,2267,735,-650.97,13.06,-650.46,408.58,-8.785,0.281,-99999 99080,99587,99548,32,170,531,802,819,2304,727,-615.64,13.2,-615.16,405.63,-8.583,1.2,-99999