Trinidad Head, California, United States [THD]
Location
- Country: United States
- Latitude: 41.0541° North
- Longitude: 124.151° West
- Elevation: 107.00 masl
- Time Zone: Local Time + 8.0 hour(s) = UTC
Contact
- Contact Name: Mike Ives
- Address: HSU Marine Lab
570 Ewing St
Trinidad Head, California, 95570, United States - Phone: (707) 826-3705
- Fax: (707) 826-3682
Data
Cooperating Agencies
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
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Carbon Dioxide | CO2 | 2002-04-19 | Ongoing |
Methane | CH4 | 2002-04-19 | Ongoing |
Carbon Monoxide | CO | 2002-04-19 | Ongoing |
Molecular Hydrogen | H2 | 2002-04-19 | Ongoing |
Nitrous Oxide | N2O | 2002-04-19 | Ongoing |
Sulfur Hexafluoride | SF6 | 2002-04-19 | Ongoing |
Carbon-13/Carbon-12 in Carbon Dioxide | d13C (CO2) | 2002-04-19 | Ongoing |
Oxygen-18/Oxygen-16 in Carbon Dioxide | d18O (CO2) | 2002-04-19 | Ongoing |
Methyl Chloride | CH3Cl | 2004-10-07 | Ongoing |
Benzene | C6H6 | 2004-10-07 | Ongoing |
toluene | C7H8 | 2004-10-07 | Ongoing |
ethane | C2H6 | 2004-10-07 | Ongoing |
ethene | C2H4 | 2004-10-07 | Ongoing |
propane | C3H8 | 2004-10-07 | Ongoing |
propene | C3H6 | 2004-10-07 | Ongoing |
i-butane | i-C4H10 | 2004-10-07 | Ongoing |
n-butane | n-C4H10 | 2004-10-07 | Ongoing |
i-pentane | i-C5H12 | 2004-10-07 | Ongoing |
n-pentane | n-C5H12 | 2004-10-07 | Ongoing |
n-hexane | n-C6H14 | 2004-10-07 | Ongoing |
Wind Speed | ws | 2002-04-19 | Ongoing |
Wind Direction | wd | 2002-04-19 | Ongoing |
Temperature | temp | 2004-08-20 | Terminated - 2004-09-22 |
isoprene | C5H8 | 2004-10-07 | Ongoing |
Acetylene | C2H2 | 2011-04-15 | Ongoing |
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Carbon Dioxide | CO2 | 2003-09-02 | Ongoing |
Methane | CH4 | 2003-09-02 | Ongoing |
Carbon Monoxide | CO | 2003-09-02 | Ongoing |
Molecular Hydrogen | H2 | 2003-09-02 | Ongoing |
Nitrous Oxide | N2O | 2003-09-02 | Ongoing |
Sulfur Hexafluoride | SF6 | 2014-09-27 | Ongoing |
Sulfur Hexafluoride | SF6 | 2003-09-02 | Ongoing |
Carbon-13/Carbon-12 in Carbon Dioxide | d13C (CO2) | 2003-10-08 | Ongoing |
Oxygen-18/Oxygen-16 in Carbon Dioxide | d18O (CO2) | 2003-10-08 | Ongoing |
HFC-134a | CH2FCF3 | 2004-11-12 | Ongoing |
HCFC-22 | CHF2Cl | 2004-11-12 | Ongoing |
CFC-12 | CCl2F2 | 2004-11-12 | Ongoing |
Methyl Chloride | CH3Cl | 2004-11-12 | Ongoing |
CFC-114 and CFC-114a (combined) | CFC-114 and CFC-114a (combined) | 2004-11-12 | Ongoing |
HCFC-142b | CH3CF2Cl | 2004-11-12 | Ongoing |
Halon-1211 | CBrClF2 | 2004-11-12 | Ongoing |
methyl bromide | CH3Br | 2004-11-12 | Ongoing |
CFC-11 (ion 101) | CCl3F (ion 101) | 2004-11-12 | Ongoing |
CFC-11 (ion 103) | CCl3F (ion 103) | 2010-05-23 | Ongoing |
HCFC-141b | CH3CCl2F | 2004-11-12 | Ongoing |
methyl iodide | CH3I | 2004-11-12 | Ongoing |
CFC-113 | CCl2FCClF2 | 2004-11-12 | Ongoing |
dichloromethane | CH2Cl2 | 2004-11-12 | Ongoing |
chloroform | CHCl3 | 2004-11-12 | Ongoing |
methyl chloroform (ion 97) | CH3CCl3 | 2004-11-12 | Ongoing |
methyl chloroform (ion 99) | CH3CCl3 | 2010-05-23 | Terminated - 2012-10-04 |
carbon tetrachloride | CCl4 | 2004-11-12 | Ongoing |
dibromomethane | CH2Br2 | 2004-11-12 | Ongoing |
tetrachloroethylene | C2Cl4 | 2004-11-12 | Ongoing |
bromoform | CHBr3 | 2004-11-12 | Ongoing |
Benzene | C6H6 | 2004-11-12 | Ongoing |
carbonyl sulfide | COS | 2004-11-12 | Ongoing |
HCFC-21 | CHCl2F | 2015-10-15 | Ongoing |
HFC-152a | CH3CHF2 | 2004-11-12 | Ongoing |
HCFC-124 | CHClFCF3 | 2004-11-12 | Ongoing |
toluene | C7H8 | 2007-07-25 | Ongoing |
carbonyl disulfide | CS2 | 2004-11-12 | Ongoing |
Sample Pressure | press | 2007-06-09 | Terminated - 2010-06-20 |
ethane | C2H6 | 2014-09-27 | Ongoing |
ethene | C2H4 | 2014-09-27 | Ongoing |
propane | C3H8 | 2007-06-09 | Ongoing |
propene | C3H6 | 2014-09-27 | Ongoing |
i-butane | i-C4H10 | 2014-09-27 | Ongoing |
n-butane | n-C4H10 | 2007-06-09 | Ongoing |
i-pentane | i-C5H12 | 2007-06-09 | Ongoing |
n-pentane | n-C5H12 | 2007-06-09 | Ongoing |
n-hexane | n-C6H14 | 2014-09-27 | Ongoing |
Temperature | temp | 2003-09-02 | Ongoing |
Ambient Pressure | press | 2004-01-22 | Terminated - 2013-04-18 |
Relative Humidity | rh | 2003-09-02 | Ongoing |
Halon 1301 | CF3Br | 2007-06-09 | Ongoing |
Halon 2402 | CBrF2CBrF2 | 2007-06-09 | Ongoing |
HFC-143a | CH3CF3 | 2007-06-09 | Ongoing |
HFC-227ea | CF3CHFCF3 | 2007-06-09 | Ongoing |
HFC-365mfc | CH3CF2CH2CF3 | 2007-06-09 | Ongoing |
CFC-115 | CClF2CF3 | 2007-06-09 | Ongoing |
HFC-125 | CHF2CF3 | 2007-06-09 | Ongoing |
CFC-13 | CClF3 | 2007-06-09 | Ongoing |
Chloroethane | CH3CH2Cl | 2007-06-09 | Terminated - 2014-05-11 |
HFC-23 | CHF3 | 2007-06-09 | Ongoing |
Perfluoropropane | C3F8 | 2008-03-22 | Ongoing |
Acetylene | C2H2 | 2008-03-22 | Ongoing |
HFC-32 | CH2F2 | 2009-04-04 | Ongoing |
HFC-134 | CHF2CHF2 | 2009-04-04 | Ongoing |
CH2BrCl | CH2BrCl | 2014-09-27 | Ongoing |
tetrafluoromethane | CF4 | 2014-09-27 | Ongoing |
hexafluoroethane | CF3CF3 | 2014-09-27 | Ongoing |
nitrogen trifluoride | NF3 | 2015-10-15 | Ongoing |
sulfuryl fluoride | SO2F2 | 2014-09-27 | Ongoing |
HFC-236fa | CF3CH2CF3 | 2014-09-27 | Ongoing |
HCFC-133a | CH2ClCF3 | 2015-10-15 | Ongoing |
CFC-112 | CCl3CClF2 | 2014-09-27 | Ongoing |
C2HCl3 | C2HCl3 | 2014-09-27 | Ongoing |
HATS Flask Sampling
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
HFC-134a | CH2FCF3 | 2002-02-26 | Ongoing |
HCFC-22 | CHF2Cl | 2002-03-06 | Ongoing |
Methyl Chloride | CH3Cl | 2002-03-06 | Ongoing |
HCFC-142b | CH3CF2Cl | 2002-02-26 | Ongoing |
Halon-1211 | CBrClF2 | 2002-02-26 | Ongoing |
methyl bromide | CH3Br | 2002-03-06 | Ongoing |
HCFC-141b | CH3CCl2F | 2002-02-26 | Ongoing |
CFC-113 | CCl2FCClF2 | 2002-02-26 | Ongoing |
dichloromethane | CH2Cl2 | 2002-03-06 | Ongoing |
tetrachloroethylene | C2Cl4 | 2002-03-06 | Ongoing |
carbonyl sulfide | COS | 2002-04-03 | Ongoing |
HFC-152a | CH3CHF2 | 2002-02-26 | Ongoing |
Halon 1301 | CF3Br | 2004-02-26 | Ongoing |
Halon 2402 | CBrF2CBrF2 | 2004-02-26 | Ongoing |
HFC-143a | CH3CF3 | 2007-01-17 | Ongoing |
HFC-227ea | CF3CHFCF3 | 2011-06-19 | Ongoing |
HFC-365mfc | CH3CF2CH2CF3 | 2009-08-10 | Ongoing |
HFC-125 | CHF2CF3 | 2007-01-17 | Ongoing |
HFC-32 | CH2F2 | 2009-03-14 | Ongoing |
Methyl Chloroform | CH3CCl3 | 2002-02-26 | Ongoing |
Aerosol Surface In-Situ
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Light Scattering Coefficient | σsp | 2002-01-01 | Ongoing |
Light Absorption Coefficient | σap | 2002-01-01 | Ongoing |
Particle Number Concentration | Nt | 2002-01-01 | Ongoing |
Aerosol Chemical Composition | 2002-01-01 | Ongoing | |
Aerosol Hygroscopic Growth | f(RH) | 2002-01-01 | Ongoing |
Radiation In-Situ Observatory
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Direct Beam | 2002-04-10 | Ongoing | |
Shortwave Global | 2002-04-10 | Ongoing | |
Diffuse | 2002-04-10 | Ongoing | |
Downward Longwave | 2003-05-20 | Ongoing |
Surface Ozone
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Ozone | O3 | 2002-04-18 | Ongoing |
Ozonesonde
Trajectories
Lidar
Meteorology
Parameter | Formula | First Sample Date | Status |
---|---|---|---|
Wind Speed | ws | 2002-06-29 | Ongoing |
Wind Direction | wd | 2002-06-29 | Ongoing |
Temperature | temp | 2002-04-10 | Ongoing |
Ambient Pressure | press | 2002-04-10 | Ongoing |
Relative Humidity | rh | 2002-04-10 | Ongoing |
Ozone Airborne
Trace gases Airborne Flasks