#
# These data are freely available for use in education and research.  If the data are used for scientific 
# publication and/or presentation, it is necessary to get approval of the data provider in advance.  
# Judging from the nature of the data usage, the data provider may require fair acknowledgement including 
# co-authorship to the data user.
# For technical reasons, the data may be revised without any notice.  This data file must be obtained from the
# original data site and not be re-distributed.  For more information, please contact with the data provider.
#
# CATEGORY: atmospheric Ar/N2 ration measurement
# STATION NAME : Syowa Station, Antarctica
# LOCATION: 69.00 S, 39.58 E
# CONTRIBUTOR: National Institute of Advanced Industrial Science and Technology, and National Institute of Polar Research
# CONTACT PERSON: Shigeyuki Ishidoya (s-ishidoya@aist.go.jp), Daisuke Goto (goto.daisuke@nipr.ac.jp)
# PARAMETER: Ar/N2 ratio
# COVERING PERIOD: 2016-01-30 2018-12-09
# DATA FREQUENCY: event
# MEASUREMENT UNIT: per meg
# MEASUREMENT METHOD: Mass spectrometer (Thermo Scientific, Delta-V)
# SAMPLING TYPE: flask
# MEASUREMENT SCALE: AIST scale
# REMARKS: date are shown in local time (UTC+3)
# VERSION: 20191219
#
# year	month	day	hour	minute	delta_ArN2 (per meg)
2016	01	30	08	35	-69.4 
2016	02	23	19	10	-58.4 
2016	03	21	15	44	-52.7 
2016	04	27	15	13	-60.0 
2016	06	02	02	15	-69.4 
2016	07	01	17	44	-70.1 
2016	08	26	08	24	-75.3 
2016	10	02	17	03	-75.3 
2016	10	29	09	33	-64.5 
2016	12	01	03	50	-62.7 
2016	12	31	06	23	-69.8 
2017	01	28	08	06	-53.8 
2017	03	24	17	06	-45.2 
2017	04	27	15	02	-37.5 
2017	05	26	11	46	-34.8 
2017	07	01	14	14	-51.2 
2017	07	29	11	14	-41.3 
2017	08	31	15	58	-58.5 
2017	09	30	07	50	-69.8 
2017	10	28	12	50	-64.0 
2017	12	28	09	34	-63.5 
2018	01	25	18	42	-56.4 
2018	02	22	21	30	-35.3 
2018	03	21	20	13	-21.4 
2018	04	24	17	05	-28.3 
2018	05	21	14	00	-64.7 
2018	06	25	11	37	-56.3 
2018	07	25	10	48	-67.3 
2018	08	15	14	51	-57.9 
2018	09	25	09	55	-65.4 
2018	10	21	14	16	-54.2 
2018	11	20	15	01	-64.6 
2018	12	09	10	44	-23.1