|1957-1979 | 1981-1999 | 2000-Present | Abbreviation |

CHRONICLE OF CARBON DIOXIDE (CO2) OBSERVATION						RELATED EVENTS
Atmospheric Observation (CO2 concentration)			Oceanographic Observation (pCO2 and TCO2)	Terrestrial Observation (CO2 flux)
Surface Observation	Aircraft and Satellite Observation	Ship Observation	Ship Observation	Surface Observation
1957 Observations started at the South Pole (Scripps Institution of Oceanography (SIO), U.S.A.)			1957-1967 Observations of pCO2 started in the Pacific, Atlantic and Indian Oceans. (SIO, U.S.A.)	1957-1967 Observations by the aerodynamic method started in paddy and wheat fields. (National Institute of Agricultural Sciences (the current National Institute for Agro-Environmental Sciences (NIAES), Japan))		1957-1958 International Geophysical Year
1958 Observations started at Mauna Loa, Hawaii. (SIO, U.S.A.)						1959 The International Geophysical Cooperation
	1963-1979 Aircraft observations were performed over the Arctic region. (Stockholm University, Sweden)
			1968 Observations of pCO2 in the Global Ocean started. (Lamont Doherty Earth Observatory (LDEO), U.S.A., Meteorological Research Institute (MRI), Japan and others)
1969 Observations started at Mauna Loa, Hawaii. (National Oceanic and Atmospheric Administration (NOAA)), U.S.A)						1969 The Background Air Pollution Monitoring Network (BAPMoN) was established. (World Meteorological Organization (WMO))
						1971 Japan Environment Agency was established.
1972 Observations started at Baring Head, New Zealand. (National Institute of Water and Atmospheric Research, (NIWA), New Zealand)	1972-1981 Aircraft observations were performed over Australia. (The Commonwealth Scientific and Industrial Research Organization (CSIRO), Australia )		1972-1978 The first observation of TCO2 in the Global Ocean was performed by the U.S.A. (Geochemical Ocean Section Study, (GEOSECS), and U.S.A.)			1972 The United Nations Conference on the Human Environment was held.
						1974 The National Institute for Environmental Studies was established in Japan.
1976 Observations started at Cape Grim, Australia. (CSIRO, Australia)				1976-1977 Experimental observations by the eddy correlation method were performed in wheat and paddy fields. (Okayama University, Japan)
	1979 Aircraft observations started over Japan. (Tohoku University, Japan)					1979 The First World Climate Conference was held.