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Station Characteristics 2009-05-07/0
GAW ID THD Trinidad Head (CA) (United States)
station status full operation Global station in WMO RA IV - North/Central America
time zone UTC-8 41.05000°N 124.15000°W (107 m a.s.l.)
climate zone Csb (Warm temperate climate with dry and warm summer) http://www.esrl.noaa.gov/gmd/obop/thd/
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 parameter method contributor start end details
Aerosol Hemispheric backscattering coefficient Nephelometry, integrating NOAA-ESRL-GMD 2002-04-20 2006-05-30
Hemispheric backscattering coefficient Nephelometry, integrating NOAA-ESRL-GMD 2002-04-20
Light absorption coefficient Light absorption photometry NOAA-ESRL-GMD 2002-04-20 2005-10-30
Light absorption coefficient Light absorption photometry NOAA-ESRL-GMD 2005-10-07
Light scattering coefficient Nephelometry, integrating NOAA-ESRL-GMD 2002-04-20
Light scattering coefficient Nephelometry, integrating NOAA-ESRL-GMD 2002-04-20 2006-05-30
Major inorganic components (coarse) Ion Chromatography (IC) [general] NOAA-PMEL 2002-05-08
Major inorganic components (fine) Ion Chromatography (IC) [general] NOAA-PMEL 2002-05-08
Number concentration Condensation particle counter (CPC) NOAA-ESRL-GMD 2002-04-20
Greenhouse Gas C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2009-05-18
C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113) GC-ECD AGAGE 1995-10-01 2009-03-31
C2H3Cl2F (1,1-dichloro-1-fluoroethane, HCFC-141b) GC-MS AGAGE 2005-03-18 2009-03-31
C2H3Cl2F (1,1-dichloro-1-fluoroethane, HCFC-141b) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2009-05-18
C2H3ClF2 (1-chloro-1,1-difluoroethane, HCFC-142b) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2009-05-18
C2H3ClF2 (1-chloro-1,1-difluoroethane, HCFC-142b) GC-MS AGAGE 2005-03-18 2009-03-31
C2H4F2 (1,1-difluoroethane, HFC-152a) GC-MS AGAGE 2005-03-18 2009-03-31
C4H5F5 (1,1,1,3,3-pentafluorobutane, HFC-365mfc) GC-MS AGAGE 2005-03-18 2009-03-31
CBrClF2 (Halon 1211) GC-MS NOAA-ESRL-GMD 2002-02-26 2008-07-27
CBrClF2 (Halon 1211) GC-MS AGAGE 2005-03-18 2009-03-31
CBrF3 (Halon 1301) GC-MS AGAGE 2005-03-18 2009-03-31
CCl2F2 (dichlorodifluoromethane, CFC-12) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2009-05-18
CCl2F2 (dichlorodifluoromethane, CFC-12) GC-ECD AGAGE 1995-10-01 2009-03-31
CCl3F (trichlorofluoromethane, CFC-11) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2009-05-18
CCl3F (trichlorofluoromethane, CFC-11) GC-ECD AGAGE 1995-10-01 2009-03-31
CCl4 ## Flask sampling NOAA-ESRL-GMD 2002-04-04 2003-05-14
CCl4 GC-ECD AGAGE 1995-10-01 2009-03-31
CH2F4 (1,1,1,2-tetrafluoroethane, HFC-134a) GC-MS NOAA-ESRL-GMD 2002-02-26 2009-05-18
CH2F4 (1,1,1,2-tetrafluoroethane, HFC-134a) GC-MS AGAGE 2005-03-18 2009-03-31
CH3CCl3 (1,1,1-trichloroethane) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2008-07-27
CH3CCl3 (1,1,1-trichloroethane) GC-ECD AGAGE 1995-10-01 2009-03-31
CH4 GC-FID AGAGE 1995-10-01 2009-03-31
CH4 ## Flask sampling NOAA-ESRL-GMD 2002-04-01 2008-12-31
CHClF2 (difluoromethane, HCFC-22) GC-MS AGAGE 2005-03-18 2009-03-31
CHClF2 (difluoromethane, HCFC-22) ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2009-05-18
CHF2CF3 (pentafluoroethane, HFC-125) GC-MS AGAGE 2005-03-18 2009-03-31
CO2 ## Flask sampling NOAA-ESRL-GMD 2002-04-01 2008-12-31
CO2 [C-13] ## Flask sampling NOAA-ESRL-GMD 2002-04-01 2007-12-26
CO2 [O-18] ## Flask sampling NOAA-ESRL-GMD 2002-04-01 2007-12-26
N2O GC-ECD AGAGE 1995-10-01 2009-03-31
N2O ## Flask sampling NOAA-ESRL-GMD 2002-02-26 2002-10-17
SF6 GC-MS AGAGE 2005-03-18 2009-03-31
SF6 ## Flask sampling NOAA-ESRL-GMD 2002-02-28 2005-08-22
SO2F2 (sulphuryl fluoride) GC-MS AGAGE 2005-03-18 2009-03-31
Meteo Trajectories NOAA-ESRL-GMD
Trajectories FLEXTRA Empa 2005-01-01
Ozone Surface ozone UV photometry [general] NOAA-ESRL-GMD 2002-04-01 2009-12-31
Vertical ozone profile ECC Sonde NOAA-ESRL-GMD 1999-01-06 2006-08-31
Reactive Gas C2Cl4 GC-MS AGAGE 2005-03-18 2009-03-31
C2HCl3 GC-MS AGAGE 2005-03-18 2009-03-31
CH2Cl2 (dichloromethane) GC-MS AGAGE 2005-03-18 2009-03-31
CH3Br (methylbromide) GC-MS AGAGE 2005-03-18 2009-03-31
CH3Br (methylbromide) GC-MS NOAA-ESRL-GMD 2002-03-06 2009-05-18
CH3Cl (methylchloride) GC-MS AGAGE 2005-03-18 2009-03-31
CHCl3 (chloroform) GC-ECD AGAGE 1995-10-01 2009-03-31
CO ## Flask sampling NOAA-ESRL-GMD 2002-04-01 2009-12-22

Contact Person(s)
name Mr. Thomas J. Conway
address NOAA/ESRL/GMD
325 Broadway
Boulder, CO 80305
United States
2009-05-12/1689207423
phone
fax
mailto thomas.j.conway@noaa.gov
url
GAW function
station function Measurement leader [Greenhouse Gas: CO2]

name Dr. Edward J. Dlugokencky
address NOAA-ERSL-GMD
325 Broadway
Boulder, CO 80305
United States
2009-05-12/1689207423
phone +1 303-497-6228
fax +1 303-497-6290
mailto ed.dlugokencky@noaa.gov
url
GAW function
station function Measurement leader [Greenhouse Gas: CH4]

name Mr. Geoffrey S. Dutton
address Halocarbons and Other Atmosphere Trace Species Group (HATS)/NOAA/ESRL Global Monitoring Division
325 Broadway R/GMD1
Boulder, Colorado 80305-3328
United States
2008-12-16/-147256320
phone +1-303-497-6224
fax +1-303-497-6290
mailto geoff.dutton@noaa.gov
url
GAW function
station function Measurement leader [Greenhouse Gas: CCl4, Greenhouse Gas: N2O, Greenhouse Gas: SF6]

name Dr. James W. Elkins
address National Oceanic and Atmospheric Administration (NOAA)
325 Broadway
Boulder, CO 80305
United States
2008-05-26/-147256505
phone +1 (303) 497 62 24
fax +1 (303) 497 62 90
mailto james.w.elkins@noaa.gov
url
GAW function GAW CCL (Reference Scale)
station function Measurement leader [Greenhouse Gas: C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113), 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: CH2F4 (1,1,1,2-tetrafluoroethane, HFC-134a), Greenhouse Gas: CH3CCl3 (1,1,1-trichloroethane), Greenhouse Gas: CHClF2 (difluoromethane, HCFC-22), Reactive Gas: CH3Br (methylbromide)]

name Dr. Paul C. Novelli
address NOAA-ESRL-GMD
325 Broadway
Boulder, CO 80305
United States
2009-05-12/1689207423
phone +1 303-497-6774
fax +1 303-497-6290
mailto paul.c.novelli@noaa.gov
url
GAW function
station function Measurement leader [Reactive Gas: CO]

name Dr. John A. Ogren
address NOAA ESRL GMD
325 Broadway
Boulder, CO 80305
United States
2009-05-07/0
phone +1 (303) 497 6210
fax +1 (303) 497-5590
mailto John.A.Ogren@noaa.gov
url
GAW function SAG member
station function Measurement leader [Aerosol: Hemispheric backscattering coefficient, Aerosol: Hemispheric backscattering coefficient, Aerosol: Light absorption coefficient, Aerosol: Light absorption coefficient, Aerosol: Light scattering coefficient, Aerosol: Light scattering coefficient, Aerosol: Number concentration]

name Mr. Sam Oltmans
address NOAA/ESRL Global Monitoring Division
325 Broadway R/GMD1
Boulder, CO 80305-3328
United States
2009-04-28/-147256320
phone +1 303 497 6676
fax +1 303 497 5590
mailto samuel.j.oltmans@noaa.gov
url
GAW function
station function Measurement leader [Ozone: Surface ozone]

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. 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]]

name Hsiang J. (Ray) Wang
address School of Earth and Atmospheric Sciences Georgia Institute of Technology

Atlanta, GA 30332
United States
2009-12-15/0
phone +1 (404) 894-3815
fax +1 (404) 894-5638
mailto raywang@eas.gatech.edu
url
GAW function
station function Measurement leader [Greenhouse Gas: C2Cl3F3 (1,1,2-trichloro-1,2,2-trifluoroethane, CFC-113), Greenhouse Gas: C2H3Cl2F (1,1-dichloro-1-fluoroethane, HCFC-141b), Greenhouse Gas: C2H3ClF2 (1-chloro-1,1-difluoroethane, HCFC-142b), Greenhouse Gas: C2H4F2 (1,1-difluoroethane, HFC-152a), Greenhouse Gas: C4H5F5 (1,1,1,3,3-pentafluorobutane, HFC-365mfc), Greenhouse Gas: CBrClF2 (Halon 1211), Greenhouse Gas: CBrF3 (Halon 1301), Greenhouse Gas: CCl2F2 (dichlorodifluoromethane, CFC-12), Greenhouse Gas: CCl3F (trichlorofluoromethane, CFC-11), Greenhouse Gas: CCl4, Greenhouse Gas: CH2F4 (1,1,1,2-tetrafluoroethane, HFC-134a), Greenhouse Gas: CH3CCl3 (1,1,1-trichloroethane), Greenhouse Gas: CH4, Greenhouse Gas: CHClF2 (difluoromethane, HCFC-22), Greenhouse Gas: CHF2CF3 (pentafluoroethane, HFC-125), Greenhouse Gas: N2O, Greenhouse Gas: SF6, Greenhouse Gas: SO2F2 (sulphuryl fluoride), Reactive Gas: C2Cl4, Reactive Gas: C2HCl3, Reactive Gas: CH2Cl2 (dichloromethane), Reactive Gas: CH3Br (methylbromide), Reactive Gas: CH3Cl (methylchloride), Reactive Gas: CHCl3 (chloroform)]


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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