Trinidad Head, California, United States [THD]
Atmospheric Transport |
Description
Located on a point jutting into the ocean along the remote north coast of California, Trinidad Head is ideally suited for atmospheric measurements. Much of the time the site experiences baseline conditions, but it also allows for the monitoring of regionally influenced air, affected mainly by forested lands, but to a lesser extent, air having a small urban influence. An instrument trailer was installed in April 2002 allowing measurements of aerosols, surface ozone, radiation, and flask sampling for halocarbons and carbon cycle gases. Bi-weekly airborne vertical profile measurements of carbon cycle gases are collected in flasks above and upwind of Trinidad Head. GMD's measurements will provide a continuous baseline of pollution and climate forcing agents in air entering the U.S. Further plans include installing a GCMS for measuring PAN, hydrocarbons, and certain halocarbons. Additional measurements will be included as the Observatory matures. Already, at this location, Scripps Institution of Oceanography is operating two in situ instruments, one as part of the Advanced Global Atmospheric Gases Experiment (AGAGE), the other for measuring changes in atmospheric oxygen concentrations.
GMD Projects at Trinidad Head, California
Carbon Cycle Surface Flasks
Parameter | Formula | First Sample Date | Most Recent Sample Date |
---|---|---|---|
Carbon Dioxide | CO2 | 2002-04-19 | 2008-11-15 |
Methane | CH4 | 2002-04-19 | 2008-11-15 |
Carbon Monoxide | CO | 2002-04-19 | 2008-11-15 |
Molecular Hydrogen | H2 | 2002-04-19 | 2008-11-15 |
Nitrous Oxide | N2O | 2002-04-19 | 2008-11-15 |
Sulfur Hexafluoride | SF6 | 2002-04-19 | 2008-11-15 |
Carbon-13/Carbon-12 in Carbon Dioxide | d13C (CO2) | 2002-04-30 | 2008-11-15 |
Oxygen-18/Oxygen-16 in Carbon Dioxide | d18O (CO2) | 2002-04-25 | 2008-11-15 |
methyl chloride | CH3Cl | 2005-05-11 | 2008-06-26 |
Benzene | C6H6 | 2007-01-17 | 2008-06-26 |
toluene | C7H8 | 2007-01-22 | 2008-06-26 |
ethane | C2H6 | 2005-05-11 | 2008-06-26 |
ethene | C2H4 | 2005-05-20 | 2008-06-17 |
propane | C3H8 | 2005-05-11 | 2008-06-26 |
propene | C3H6 | 2005-05-20 | 2008-06-26 |
i-butane | i-C4H10 | 2005-05-11 | 2008-06-26 |
n-butane | n-C4H10 | 2005-05-11 | 2008-06-26 |
i-pentane | i-C5H12 | 2005-05-11 | 2008-06-26 |
n-pentane | n-C5H12 | 2005-05-20 | 2008-06-26 |
n-hexane | n-C6H14 | 2005-05-20 | 2008-06-26 |
wind speed | 2002-04-19 | 2008-12-08 | |
wind direction | 2002-04-19 | 2008-12-08 | |
ambient temperature | 2004-08-20 | 2004-09-22 | |
isoprene | C5H8 | 2007-01-17 | 2008-06-26 |
Carbon Cycle Airborne Flasks
Parameter | Formula | First Sample Date | Most Recent Sample Date |
---|---|---|---|
Carbon Dioxide | CO2 | 2003-09-02 | 2008-11-26 |
Methane | CH4 | 2003-09-02 | 2008-11-26 |
Carbon Monoxide | CO | 2003-09-02 | 2008-11-26 |
Molecular Hydrogen | H2 | 2003-09-02 | 2008-11-26 |
Nitrous Oxide | N2O | 2003-09-02 | 2008-11-26 |
Sulfur Hexafluoride | SF6 | 2003-09-02 | 2008-11-26 |
Carbon-13/Carbon-12 in Carbon Dioxide | d13C (CO2) | 2003-10-08 | 2008-10-20 |
Oxygen-18/Oxygen-16 in Carbon Dioxide | d18O (CO2) | 2003-10-08 | 2008-10-20 |
HFC-134a | CH2FCF3 | 2004-11-12 | 2008-10-20 |
HCFC-22 | CHF2Cl | 2004-11-12 | 2008-10-20 |
CFC-12 | CCl2F2 | 2004-11-12 | 2008-10-20 |
methyl chloride | CH3Cl | 2004-11-12 | 2008-10-20 |
CFC-114 and CFC-114a (combined) | CFC-114 and CFC-114a (combined) | 2004-11-12 | 2008-10-20 |
HCFC-142b | CH3CF2Cl | 2004-11-12 | 2008-10-20 |
Halon-1211 | CBrClF2 | 2004-11-12 | 2008-10-20 |
methyl bromide | CH3Br | 2004-11-12 | 2008-10-20 |
CFC-11 (ion 101) | CCl3F (ion 101) | 2004-11-12 | 2008-10-20 |
CFC-11 (ion 103) | CCl3F (ion 103) | 2004-11-12 | 2008-06-08 |
HCFC-141b | CH3CCl2F | 2004-11-12 | 2008-10-20 |
methyl iodide | CH3I | 2004-11-12 | 2008-10-20 |
CFC-113 | CCl2FCClF2 | 2004-11-12 | 2008-10-20 |
dichloromethane | CH2Cl2 | 2004-11-12 | 2008-10-20 |
chloroform | CHCl3 | 2004-11-12 | 2008-10-20 |
methyl chloroform (ion 97) | CH3CCl3 | 2004-11-12 | 2008-06-08 |
methyl chloroform (ion 99) | CH3CCl3 | 2004-11-12 | 2007-09-29 |
carbon tetrachloride | CCl4 | 2004-11-12 | 2008-10-20 |
dibromomethane | CH2Br2 | 2004-11-12 | 2008-10-20 |
tetrachloroethylene | C2Cl4 | 2004-11-12 | 2008-10-20 |
bromoform | CHBr3 | 2004-11-12 | 2008-10-20 |
Benzene | C6H6 | 2004-11-12 | 2008-10-20 |
carbonyl sulfide | COS | 2004-11-12 | 2008-10-20 |
HCFC-21 | CHCl2F | 2004-11-12 | 2008-06-08 |
HFC-152a | CH3CHF2 | 2004-11-12 | 2008-10-20 |
HCFC-124 | CHClFCF3 | 2004-11-12 | 2008-10-20 |
toluene | C7H8 | 2005-06-14 | 2008-06-08 |
carbonyl disulfide | CS2 | 2004-11-12 | 2008-10-20 |
Sample Pressure | press | 2004-11-12 | 2008-10-20 |
propane | C3H8 | 2007-06-09 | 2008-10-20 |
n-butane | n-C4H10 | 2007-06-09 | 2008-10-20 |
i-pentane | i-C5H12 | 2007-06-09 | 2008-10-20 |
n-pentane | n-C5H12 | 2007-06-09 | 2008-10-20 |
ambient temperature | 2003-09-02 | 2004-10-11 | |
ambient pressure | 2003-09-02 | 2004-10-11 | |
relative humidity | 2003-09-02 | 2004-10-11 | |
Halon 2402 | CBrF2CBrF2 | 2007-06-09 | 2008-10-20 |
Halon 1301 | CF3Br | 2007-06-09 | 2008-10-20 |
HFC-143a | CH3CF3 | 2007-06-09 | 2008-10-20 |
HCFC-227ea | CF3CHFCF3 | 2007-06-09 | 2008-10-20 |
HFC-365mfc | CH3CF2CH2CF3 | 2007-06-09 | 2008-10-20 |
CFC-115 | CClF2CF3 | 2007-06-09 | 2008-10-20 |
HFC-125 | CHF2CF3 | 2007-06-09 | 2008-10-20 |
CFC-13 | CClF3 | 2007-06-09 | 2008-10-20 |
Chloroethane | CH3CH2Cl | 2007-06-09 | 2008-10-20 |
HFC-23 | CHF3 | 2007-06-09 | 2008-10-20 |
Perfluoropropane | C3F8 | 2008-03-22 | 2008-10-20 |
Acetylene | C2H2 | 2008-03-22 | 2008-10-20 |
HATS Flask Sampling
Aerosol Surface, Continuous Measurements
Continuous Radiation Measurements
Parameter | Formula | First Sample Date | Most Recent Sample Date |
---|---|---|---|
Direct Beam | 2002-04-10 | Ongoing | |
Shortwave Global | 2002-04-10 | Ongoing | |
Diffuse | 2002-04-10 | Ongoing | |
Downward Longwave | 2003-05-22 | Ongoing |
Surface Ozone
Ozonesonde
Trajectories
Aerosol Airborne, Light Aircraft
Lidar
Meteorology
Parameter | Formula | First Sample Date | Most Recent Sample Date |
---|---|---|---|
wind speed 2 meters | 2008-01-01 | 2008-08-18 | |
Wind Direction 2 Meters | 2008-01-01 | 2008-08-18 | |
Wind Speed 10 Meters | 2008-01-01 | 2008-08-18 | |
Wind Direction 10 Meters | 2008-01-01 | 2008-08-18 | |
Wind Speed Top | 2008-01-01 | 2008-08-18 | |
Wind Direction Top | 2008-01-01 | 2008-08-18 | |
Barometric Pressure | 2008-01-01 | 2008-08-18 | |
Relative Humidity 2 Meters | 2008-01-01 | 2008-08-18 | |
Temperature 2 Meters | 2008-01-01 | 2008-08-18 | |
Temperature 10 Meters | 2008-01-01 | 2008-08-18 | |
temperature Top | 2008-01-01 | 2008-08-18 | |
Precipitation | 2008-01-01 | 2008-08-18 |