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Station Characteristics 2011-11-21/2141913899
GAW ID THD Trinidad Head (CA) (United States)
WMO ID Global station in WMO RA IV - North/Central America
station status full operation 41.05410°N 124.15100°W (107 m a.s.l.)
time zone UTC-8 http://www.esrl.noaa.gov/gmd/obop/thd/
climate zone Csb (Warm temperate climate with dry and warm summer)  
other affiliations AERONET(Trinidad_Head), AGAGE/SOGE/NIES, NOAA-ESRL/CCG, GALION
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. Picture of Trinidad Head (CA) facility

Measurement Program
type data center parameter method contributor data available details
Ozone WDCGG Surface ozone UV photometry [general] NOAA-ESRL-GMD 2002-04-01 ~ 2014-03-31
WOUDC Vertical ozone profile ECC Sonde NOAA-ESRL-GMD 1999-01-06 ~ 2006-08-31
Aerosol WDCA Light absorption coefficient, total aerosol 2002-01-01 ~ 2005-10-07
WDCA Light absorption coefficient, total aerosol 2002-04-17 ~ 2005-10-07
WDCA Light absorption coefficient, total aerosol 2002-04-17 ~ 2005-10-07
WDCA Light absorption coefficient, total aerosol 2002-01-01 ~ 2005-10-07
Light absorption coefficient, total aerosol Light absorption photometry NOAA-ESRL-GMD
Light absorption coefficient, total aerosol Light absorption photometry NOAA-ESRL-GMD
WDCA Light backscattering coefficient, total aerosol 2002-01-01 ~ 2013-01-01
WDCA Light backscattering coefficient, total aerosol 2002-01-01 ~ 2013-01-01
Light backscattering coefficient, total aerosol Nephelometry, integrating NOAA-ESRL-GMD
Light backscattering coefficient, total aerosol Nephelometry, integrating NOAA-ESRL-GMD
WDCA Light scattering coefficient, total aerosol 2002-01-01 ~ 2013-01-01
WDCA Light scattering coefficient, total aerosol 2002-01-01 ~ 2013-01-01
Light scattering coefficient, total aerosol Nephelometry, integrating NOAA-ESRL-GMD
Light scattering coefficient, total aerosol Nephelometry, integrating NOAA-ESRL-GMD
Major inorganic components (coarse) Ion Chromatography (IC) [general] NOAA-PMEL
Major inorganic components (fine) Ion Chromatography (IC) [general] NOAA-PMEL
WDCA Number concentration Condensation particle counter (CPC) 2002-01-01 ~ 2014-01-01
Number concentration Condensation particle counter (CPC) NOAA-ESRL-GMD
Greenhouse Gas WDCGG C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113) GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113) ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2014-12-01
WDCGG C2F6 (hexafluoroethane, PFC-116) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C2H2F4 (1,1,1,2-tetrafluoroethane, HFC-134a) GC-MS NOAA-ESRL-GMD 2002-02-26 ~ 2014-03-23
WDCGG C2H2F4 (1,1,1,2-tetrafluoroethane, HFC-134a) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C2H3Cl2F (1,1-dichloro-1-fluoroethane, HCFC-141b) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 ~ 2011-12-24
WDCGG C2H3Cl2F (1,1-dichloro-1-fluoroethane, HCFC-141b) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C2H3ClF2 (1-chloro-1,1-difluoroethane, HCFC-142b) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C2H3ClF2 (1-chloro-1,1-difluoroethane, HCFC-142b) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 ~ 2011-12-24
WDCGG C2H4F2 (1,1-difluoroethane, HFC-152a) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C2HF5 (pentafluoroethane, HFC-125) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C3F8 (octafluoropropane, PFC-218) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C3H2F6 (1,1,1,2,3,3-hexafluoropropane, HFC-236fa) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C3H3F5 (1,1,1,3,3-Pentafluoropropane, HFC-245fa) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C3HF7 (1,1,1,2,3,3,3-Heptafluoropropane, HFC-227ea) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C4H5F5 (1,1,1,3,3-pentafluorobutane, HFC-365mfc) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CBrClF2 (Halon 1211) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CBrClF2 (Halon 1211) GC-MS NOAA-ESRL-GMD 2002-02-26 ~ 2014-03-23
WDCGG CBrF3 (bromotrifluoromethane, Halon 1301) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CCl2F2 (dichlorodifluoromethane, CFC-12) GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG CCl2F2 (dichlorodifluoromethane, CFC-12) ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2014-12-01
WDCGG CCl3F (trichlorofluoromethane, CFC-11) ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2014-12-01
WDCGG CCl3F (trichlorofluoromethane, CFC-11) GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG CCl4 ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2013-12-01
WDCGG CCl4 GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG CF4 (tetrafluoromethane, carbon tetrafluoride, perfluoromethane, PFC-14) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CH3CCl3 (1,1,1-trichloroethane) GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG CH3CCl3 (1,1,1-trichloroethane) ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2013-12-01
WDCGG CH4 GC-FID AGAGE 1995-10-01 ~ 2012-09-30
WDCGG CH4 ## Flask sampling NOAA-ESRL-GMD 2002-04-01 ~ 2013-12-18
WDCGG CHClF2 (chlorodifluoromethane, HCFC-22) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CHClF2 (chlorodifluoromethane, HCFC-22) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 ~ 2011-12-24
WDCGG CHF3 (trifluoromethane, HFC-23) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CO2 ## Flask sampling NOAA-ESRL-GMD 2002-04-01 ~ 2013-12-18
WDCGG CO2 [C-13] ## Flask sampling NOAA-ESRL-GMD 2002-04-01 ~ 2012-12-27
WDCGG CO2 [O-18] ## Flask sampling NOAA-ESRL-GMD 2002-04-01 ~ 2012-12-27
WDCGG N2O GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG N2O ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2014-02-02
WDCGG SF6 GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG SF6 ## Flask sampling NOAA-ESRL-GMD 2002-01-01 ~ 2014-02-02
WDCGG SO2F2 (sulphuryl fluoride) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
Reactive Gas WDCGG C2Cl4 GC-MS NOAA-ESRL-GMD 2002-03-06 ~ 2011-07-30
WDCGG C2Cl4 GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C2H6 (ethane) GC-FID NOAA-ESRL-GMD 2004-10-07 ~ 2011-01-06
WDCGG C2HCl3 GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG C3H8 (propane) GC-FID NOAA-ESRL-GMD 2004-10-07 ~ 2011-01-06
WDCGG CH2Cl2 (dichloromethane) GC-MS NOAA-ESRL-GMD 2002-03-06 ~ 2011-07-30
WDCGG CH2Cl2 (dichloromethane) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CH3Br (methylbromide) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CH3Br (methylbromide) GC-MS NOAA-ESRL-GMD 2002-03-06 ~ 2014-03-23
WDCGG CH3Cl (methylchloride) GC-MS NOAA-ESRL-GMD 2002-03-06 ~ 2014-03-23
WDCGG CH3Cl (methylchloride) GC-MS AGAGE 2005-03-01 ~ 2012-09-30
WDCGG CHCl3 (chloroform) GC-ECD AGAGE 1995-10-01 ~ 2012-09-30
WDCGG CO ## Flask sampling NOAA-ESRL-GMD 2002-04-01 ~ 2012-12-27
WDCGG i-C4H10 (2-methylpropane, iso-butane) GC-FID NOAA-ESRL-GMD 2004-10-07 ~ 2011-01-06
WDCGG i-C5H12 (2-methylbutane, iso-pentane) GC-FID NOAA-ESRL-GMD 2004-10-07 ~ 2011-01-06
WDCGG n-C4H10 (n-butane) GC-FID NOAA-ESRL-GMD 2004-10-07 ~ 2011-01-06
WDCGG n-C5H12 (n-pentane) GC-FID NOAA-ESRL-GMD 2004-10-07 ~ 2011-01-06
Meteo Trajectories ## Numerical Model NOAA-ESRL-GMD
Trajectories FLEXTRA Empa 2005-01-01 ~ ongoing

Contact Person(s)
name Dr. James W. Elkins
address NOAA ESRL Global Monitoring Division
325 Broadway R/GMD
Boulder, CO 80305-332
United States
2011-01-17/0
phone +1 (303) 497-6224
fax +1 (303) 497-6290
mailto James.W.Elkins@noaa.gov
url www.esrl.noaa.gov/gmd/hats/personnel/elkins/elkins1.html
GAW function
station function Measurement leader [Greenhouse Gas: C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113), Greenhouse Gas: C2H2F4 (1,1,1,2-tetrafluoroethane, HFC-134a), Greenhouse Gas: C2H3Cl2F (1,1-dichloro-1-fluoroethane, HCFC-141b), Greenhouse Gas: C2H3ClF2 (1-chloro-1,1-difluoroethane, HCFC-142b), Greenhouse Gas: CBrClF2 (Halon 1211), Greenhouse Gas: CCl2F2 (dichlorodifluoromethane, CFC-12), Greenhouse Gas: CCl3F (trichlorofluoromethane, CFC-11), Greenhouse Gas: CCl4, Greenhouse Gas: CH3CCl3 (1,1,1-trichloroethane), Greenhouse Gas: CHClF2 (chlorodifluoromethane, HCFC-22), Greenhouse Gas: N2O, Greenhouse Gas: SF6, Reactive Gas: C2Cl4, Reactive Gas: CH2Cl2 (dichloromethane), Reactive Gas: CH3Br (methylbromide), Reactive Gas: CH3Cl (methylchloride)]

name Dr. Detlev Helmig
address Associate Research Professor Institute of Arctic and Alpine Research (INSTAAR) University of Colorado
1560 30th Street
Boulder, CO 80309-0450
United States
2013-01-24/-147256377
phone +1 (303) 492-2509
fax
mailto detlev@instaar.colorado.edu
url
GAW function
station function Measurement leader [Reactive Gas: C2H6 (ethane), Reactive Gas: C3H8 (propane), Reactive Gas: i-C4H10 (2-methylpropane, iso-butane), Reactive Gas: i-C5H12 (2-methylbutane, iso-pentane), Reactive Gas: n-C4H10 (n-butane), Reactive Gas: n-C5H12 (n-pentane)]

name Dr. Paul C. Novelli
address NOAA-ESRL-GMD
325 Broadway
Boulder, CO 80305
United States
2012-01-12/2141914043
phone +1 303-497-6774
fax +1 303-497-6290
mailto paul.c.novelli@noaa.gov
url
GAW function Member of SAG Reactive Gases
station function Measurement leader [Reactive Gas: CO]

name Dr. John A. Ogren
address NOAA ESRL GMD
325 Broadway
Boulder, CO 80305
United States
2011-02-01/0
phone +1 (303) 497 6210
fax +1 (303) 497-5590
mailto John.A.Ogren@noaa.gov
url
GAW function Joint Scientific Committee OPAG EPAC, Member of SAG Aerosol
station function Measurement leader [Aerosol: Light absorption coefficient, total aerosol, Aerosol: Light absorption coefficient, total aerosol, Aerosol: Light backscattering coefficient, total aerosol, Aerosol: Light backscattering coefficient, total aerosol, Aerosol: Light scattering coefficient, total aerosol, Aerosol: Light scattering coefficient, total aerosol, Aerosol: Number concentration]

name Dr. Patricia K. Quinn
address NOAA PMEL
7600 Sand Point Way NE
Seattle, WA 98115
United States
2007-12-21/0
phone +1-206-526-6892
fax +1-206-526-6744
mailto Patricia.K.Quinn@noaa.gov
url
GAW function
station function Measurement leader [Aerosol: Major inorganic components (coarse), Aerosol: Major inorganic components (fine)]

name Mr. Brian A. Vasel
address National Oceanic and Atmospheric Administration, Earth System Research Laboratory
325 Broadway R/GMD1
Boulder, Colorado 80305
United States
2012-02-01/2141914043
phone 303-497-6655
fax
mailto brian.vasel@noaa.gov
url
GAW function
station function

name Mr. Bruce Vaughn
address University of Colorado Institute of Arctic and Alpine Research (INSTAAR)
Campus box 450
Boulder, CO 80309-0450
United States
2006-06-12/0
phone +1-303-492-7985
fax +1-303-492-6388
mailto bruce.vaughn@colorado.edu
url
GAW function
station function Measurement leader [Greenhouse Gas: CO2 [C-13], Greenhouse Gas: CO2 [O-18]]


References
Li, J., et al. (2005), Halocarbon emissions estimated from Advanced Global Atmospheric Gases Experiment measured pollution events at Trinidad Head, California, J. Geophys. Res, 110
Riley, WJ, et al. (2005), Influence of terrestrial ecosystems and topography on coastal CO 2 measurements: A case study at Trinidad Head, California, J. Geophys. Res, 110, G01005, www.ess.uci.edu/~jranders/Paperpdfs/2005JGRBioRileyetal.pdf
Allan, J.D., et al. (2004), Submicron aerosol composition at Trinidad Head, California, during ITCT 2K2: Its relationship with gas phase volatile organic carbon and assessment of instrument performance, J. Geophys. Res, 109, 23, www.cnr.berkeley.edu/~ahg/pubs/Submicron.pdf
Goldstein, A.H., et al. (2004), Impact of Asian emissions on observations at Trinidad Head, California, during ITCT 2K2, J. Geophys. Res, 109, D23S17, www.as.harvard.edu:16080/chemistry/trop/publications/goldstein2004.PDF
Hudman, RC, et al. (2004), Ozone production in transpacific Asian pollution plumes and implications for ozone air quality in California, J. Geophys. Res, 109, 1--14
Newchurch, MJ, et al. (2003), Vertical distribution of ozone at four sites in the United States, J. Geophys. Res, 108, 4031
 
 
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