The Samoa Observatory is located on the northeastern tip of Tutuila island, American Samoa, on a ridge overlooking the South Pacific Ocean. Established in 1974 on a 26.7 acre site, the observatory is one of four GMD Baseline Observatories. Cape Matatula is approx. 1 km from the village of Tula. Prevailing winds are marine. Since its construction, the Samoa Observatory has survived two major hurricanes with only minor damage. Two staff operate the year-round facility commuting to work. This Observatory has the distinction of obtaining 30% of its daytime power from solar panels.
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Carbon Dioxide | CO2 | 1972-01-15 | Ongoing |
Methane | CH4 | 1983-04-23 | Ongoing |
Carbon Monoxide | CO | 1988-09-22 | Ongoing |
Molecular Hydrogen | H2 | 1989-01-05 | Ongoing |
Nitrous Oxide | N2O | 1997-05-07 | Ongoing |
Sulfur Hexafluoride | SF6 | 1997-05-07 | Ongoing |
Sulfur Hexafluoride | SF6 | 2023-02-03 | Ongoing |
Carbon-13/Carbon-12 in Carbon Dioxide | d13C (CO2) | 1990-01-04 | Ongoing |
Oxygen-18/Oxygen-16 in Carbon Dioxide | d18O (CO2) | 1990-01-04 | Ongoing |
Carbon-13/Carbon-12 in Methane | d13C (CH4) | 1998-01-06 | Ongoing |
D/H in Methane | dD (CH4) | 2005-03-28 | Terminated - 2009-09-11 |
HFC-134a | CH2FCF3 | 2023-02-03 | Ongoing |
HCFC-22 | CHF2Cl | 2023-02-03 | Ongoing |
CFC-12 | CCl2F2 | 2023-02-03 | Ongoing |
Methyl Chloride | CH3Cl | 2023-02-03 | Ongoing |
Methyl Chloride | CH3Cl | 2005-05-12 | Terminated - 2018-06-01 |
CFC-114 | CFC-114 | 2023-02-03 | Ongoing |
HCFC-142b | CH3CF2Cl | 2023-02-03 | Ongoing |
Halon-1211 | CBrClF2 | 2023-02-03 | Ongoing |
Methyl Bromide | CH3Br | 2023-02-03 | Ongoing |
CFC-11 | CCl3F (ion 103) | 2023-02-03 | Ongoing |
HCFC-141b | CH3CCl2F | 2023-02-03 | Ongoing |
Methyl Iodide | CH3I | 2023-02-03 | Ongoing |
CFC-113 | CCl2FCClF2 | 2023-02-03 | Ongoing |
Dichloromethane | CH2Cl2 | 2023-02-03 | Ongoing |
Chloroform | CHCl3 | 2023-02-03 | Ongoing |
Methyl Chloroform (97) | CH3CCl3 | 2023-02-03 | Ongoing |
Carbon Tetrachloride | CCl4 | 2023-02-03 | Ongoing |
Methelyne Bromide | CH2Br2 | 2023-02-03 | Ongoing |
Perchloroethylene (PCE) | C2Cl4 | 2023-02-03 | Ongoing |
Bromoform | CHBr3 | 2023-02-03 | Ongoing |
Benzene | C6H6 | 2023-02-03 | Ongoing |
Benzene | C6H6 | 2007-01-16 | Terminated - 2018-06-01 |
Carbonyl Sulfide | COS | 2023-02-03 | Ongoing |
HCFC-21 | CHCl2F | 2023-02-03 | Ongoing |
HFC-152a | CH3CHF2 | 2023-02-03 | Ongoing |
HCFC-124 | CHClFCF3 | 2023-02-03 | Ongoing |
Methylbenzene | C7H8 | 2007-01-16 | Terminated - 2018-06-01 |
Carbon Disulfide | CS2 | 2023-02-03 | Ongoing |
Ethane | C2H6 | 2005-05-12 | Terminated - 2018-06-01 |
Ethane | C2H6 | 2023-02-03 | Ongoing |
Ethylene | C2H4 | 2005-05-12 | Terminated - 2018-06-01 |
Ethylene | C2H4 | 2023-02-03 | Ongoing |
Propane | C3H8 | 2005-05-12 | Terminated - 2018-06-01 |
Propane | C3H8 | 2023-02-03 | Ongoing |
Propylene | C3H6 | 2005-05-12 | Terminated - 2018-06-01 |
Propylene | C3H6 | 2023-02-03 | Ongoing |
Isobutane | i-C4H10 | 2005-05-12 | Terminated - 2018-06-01 |
Isobutane | i-C4H10 | 2023-02-03 | Ongoing |
n-Butane | n-C4H10 | 2023-02-03 | Ongoing |
n-Butane | n-C4H10 | 2005-05-12 | Terminated - 2018-06-01 |
isopentane | i-C5H12 | 2023-02-03 | Ongoing |
isopentane | i-C5H12 | 2005-05-12 | Terminated - 2018-06-01 |
n-Pentane | n-C5H12 | 2023-02-03 | Ongoing |
n-Pentane | n-C5H12 | 2005-05-12 | Terminated - 2018-06-01 |
n-Hexane | n-C6H14 | 2023-02-03 | Ongoing |
n-Hexane | n-C6H14 | 2005-05-12 | Terminated - 2018-06-01 |
isoprene | C5H8 | 2007-01-16 | Terminated - 2018-06-01 |
Halon-1301 | CF3Br | 2023-02-03 | Ongoing |
Halon-2402 | CBrF2CBrF2 | 2023-02-03 | Ongoing |
HFC-143a | CH3CF3 | 2023-02-03 | Ongoing |
HFC-227ea | CF3CHFCF3 | 2023-02-03 | Ongoing |
HFC-365mfc | CH3CF2CH2CF3 | 2023-02-03 | Ongoing |
CFC-115 | CClF2CF3 | 2023-02-03 | Ongoing |
HFC-125 | CHF2CF3 | 2023-02-03 | Ongoing |
CFC-13 | CClF3 | 2023-02-03 | Ongoing |
HFC-23 | CHF3 | 2023-02-03 | Ongoing |
PFC-218 | C3F8 | 2023-02-03 | Ongoing |
Acetylene | C2H2 | 2023-02-03 | Ongoing |
Acetylene | C2H2 | 2007-05-25 | Terminated - 2018-06-01 |
HFC-32 | CH2F2 | 2023-02-03 | Ongoing |
HFC-134 | CHF2CHF2 | 2023-02-03 | Ongoing |
Halon-1011 | CH2BrCl | 2023-02-03 | Ongoing |
PFC-14 | CF4 | 2023-02-03 | Ongoing |
PFC-116 | CF3CF3 | 2023-02-03 | Ongoing |
Trifluoroamine | NF3 | 2023-02-03 | Ongoing |
Sulfuryl Fluoride | SO2F2 | 2023-02-03 | Ongoing |
HFC-236fa | CF3CH2CF3 | 2023-02-03 | Ongoing |
HCFC-133a | CH2ClCF3 | 2023-02-03 | Ongoing |
CFC-112 | CCl3CClF2 | 2023-02-03 | Ongoing |
Trichloroethylene (TCE) | C2HCl3 | 2023-02-03 | Ongoing |
HFO-1234yf | CH2=CFCF3 | 2023-02-03 | Ongoing |
HFO-1234zeE | CHF=CHCF3 | 2023-02-03 | Ongoing |
ethylene dichloride (1,2 DCE) | CH2ClCH2Cl | 2023-02-03 | Ongoing |
HCFC-123 | CHCl2CF3 | 2023-02-03 | Ongoing |
Morpholine | C5F11NO | 2023-02-03 | Ongoing |
Perfluorotriethylamine (PFTEA) | (C2F5)3N | 2023-02-03 | Ongoing |
Perfluorotripropylamine (PFTPA) | (C3F7)3N | 2023-02-03 | Ongoing |
HFC-245fa | 2023-02-03 | Ongoing |
Carbon Cycle In Situ Observatory
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Carbon Dioxide | CO2 | 1976-01-01 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
HFC-134a | CH2FCF3 | 1994-11-29 | Ongoing |
HCFC-22 | CHF2Cl | 1991-11-26 | Ongoing |
CFC-12 | CCl2F2 | 2010-01-08 | Ongoing |
Methyl Chloride | CH3Cl | 1993-11-09 | Ongoing |
HCFC-142b | CH3CF2Cl | 1992-02-11 | Ongoing |
Halon-1211 | CBrClF2 | 1991-12-30 | Ongoing |
Methyl Bromide | CH3Br | 1993-11-09 | Ongoing |
HCFC-141b | CH3CCl2F | 1993-01-14 | Ongoing |
CFC-113 | CCl2FCClF2 | 1991-12-30 | Ongoing |
Dichloromethane | CH2Cl2 | 1994-01-12 | Ongoing |
Perchloroethylene (PCE) | C2Cl4 | 1993-12-15 | Ongoing |
Carbonyl Sulfide | COS | 2000-03-07 | Ongoing |
HFC-152a | CH3CHF2 | 2000-08-09 | Ongoing |
Halon-2402 | CBrF2CBrF2 | 1995-02-13 | Ongoing |
HFC-227ea | CF3CHFCF3 | 2011-04-06 | Ongoing |
HFC-365mfc | CH3CF2CH2CF3 | 2009-07-02 | Ongoing |
Methyl Chloroform | CH3CCl3 | 1991-11-26 | Ongoing |
CFC-11 | CCl3F | 2010-01-08 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Nitrous Oxide | N2O | 1998-12-08 | Ongoing |
Sulfur Hexafluoride | SF6 | 1998-12-03 | Ongoing |
HCFC-22 | CHF2Cl | 1999-02-16 | Ongoing |
CFC-12 | CCl2F2 | 1998-12-04 | Ongoing |
Methyl Chloride | CH3Cl | 1999-01-28 | Ongoing |
HCFC-142b | CH3CF2Cl | 1999-01-28 | Ongoing |
Halon-1211 | CBrClF2 | 1999-03-02 | Ongoing |
CFC-113 | CCl2FCClF2 | 1998-12-03 | Ongoing |
Carbon Tetrachloride | CCl4 | 1998-12-04 | Ongoing |
Methyl Chloroform | CH3CCl3 | 1998-12-08 | Ongoing |
CFC-11 | CCl3F | 1998-12-08 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Light Scattering Coefficient | σsp | 1977-01-01 | Terminated - 1991-01-01 |
Particle Number Concentration | Nt | 1977-01-01 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Direct Normal | 1976-02-01 | Ongoing | |
Downwelling Shortwave | 1976-02-01 | Ongoing | |
Diffuse | 1995-08-21 | Ongoing | |
Downwelling Longwave | 1999-08-06 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Ozone | O3 | 1975-12-14 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Ozone | O3 | 1976-01-02 | Ongoing |
Meteorology
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Wind Speed | ws | 1976-01-21 | Ongoing |
Wind Direction | wd | 1976-01-21 | Ongoing |
Temperature | temp | 1976-01-05 | Ongoing |
Ambient Pressure | press | 1976-01-09 | Ongoing |
Relative Humidity | rh | 1976-01-06 | Ongoing |