51,1001
Stephens, Britton
National Center for Atmospheric Research
Medusa Whole Air Flask Sampler
ATom
1,1
2018,5,19,2021,1,21
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
21
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: R3
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
49211,51079,51047,1,170,541,758,850,2756,780,-677.46,25.02,-680.12,412.82,-99999,-99999,-99999
51086,51531,51499,2,170,541,804,853,2752,784,-667.12,26.96,-670.29,412.58,-99999,-99999,-99999
51538,52491,52459,3,170,541,800,848,2743,774,-672.14,4.18,-669.27,411.83,-99999,-99999,-99999
53379,54001,53968,4,170,540,750,846,2719,771,-674.55,-7.82,-668.5,411.49,-99999,-99999,-99999
54008,55842,55809,5,170,541,795,844,2684,766,-685.17,12.57,-684.53,413.52,-99999,-99999,-99999
55848,57754,57721,6,170,541,793,843,2676,767,-675.35,15.35,-675.44,411.33,-99999,-99999,-99999
57760,59723,59690,7,170,541,786,840,2680,767,-681.91,13.66,-681.55,413.01,-99999,-99999,-99999
59730,60542,60509,8,170,541,791,840,2677,765,-684.92,10.99,-683.86,413.18,-99999,-99999,-99999
60548,61414,61381,9,170,541,789,839,2674,764,-701.31,11.73,-700.44,414.76,-99999,-99999,-99999
61421,61831,61798,10,170,541,794,835,2683,764,-694.92,17.34,-695.54,415.03,-99999,-99999,-99999
61837,62401,62368,11,170,541,792,840,2675,766,-687.72,21.03,-689.32,413.38,-99999,-99999,-99999
62407,63251,63218,12,170,541,790,840,2686,763,-641.49,-13.42,-637.35,407.17,-99999,-99999,-99999
63258,65173,65140,13,170,541,789,838,2670,762,-627.07,-38.74,-621.83,404.32,-99999,-99999,-99999
65179,66040,66007,14,170,541,786,842,2680,766,-692.11,6.77,-689.93,413.44,-99999,-99999,-99999
66047,66938,66905,15,170,540,790,855,2674,780,-700.68,-2.96,-695.92,414.72,-99999,-99999,-99999
66944,67606,67573,16,170,541,794,838,2673,756,-683.03,4.25,-680.18,412.48,-99999,-99999,-99999
67616,69065,69032,17,170,541,791,844,2674,736,-646.15,-27.41,-638.43,407.92,-99999,-99999,-99999
69076,70667,70634,18,170,540,794,880,2658,780,-693.56,4.56,-690.79,414.74,-99999,-99999,-99999
70678,71605,71571,19,170,541,798,868,2633,736,-677.13,8.3,-675.35,412.02,-99999,-99999,-99999
71616,74265,74232,20,170,541,794,864,2664,731,-703.35,7.11,-701.26,415.18,-99999,-99999,-99999
74276,75296,75263,21,170,541,799,861,2636,737,-673.14,-1.99,-668.63,411.21,-99999,-99999,-99999
75307,77739,77706,22,170,541,792,848,2667,725,-703.55,18.5,-704.48,415.79,-99999,-99999,-99999
77750,78511,78478,23,170,541,797,842,2659,724,-679.32,16.54,-679.73,412.78,-99999,-99999,-99999
78522,79651,79618,24,170,541,793,851,2661,716,-660.9,-1.17,-657.43,409.81,-99999,-99999,-99999
79662,80191,80158,25,170,541,793,850,2666,734,-678.43,14.35,-678.26,412.74,-99999,-99999,-99999
80202,81173,81140,26,170,541,795,851,2667,737,-704.46,7.72,-702.53,415.73,-99999,-99999,-99999
81184,81391,81358,27,170,541,796,849,2672,754,-99999,-99999,-99999,-99999,-99999,-99999,-99999
81402,84687,84648,28,110,670,793,772,1492,724,-622.26,-59.57,-617.3,402.82,-99999,-99999,-99999
84698,85393,85333,29,110,670,761,776,1485,718,-629.16,-41.73,-623.72,404.01,-99999,-99999,-99999
85404,86046,85986,30,110,670,762,776,1480,730,-627.77,-46,-620.42,403.92,-99999,-99999,-99999
86057,87119,87059,31,110,670,762,780,1482,732,-621.05,-58.61,-614.89,403.03,-99999,-99999,-99999
87130,87661,87625,32,170,541,762,866,2609,740,-679.71,14.06,-679.46,412.78,-99999,-99999,-99999