Details of CEH involvement through EMEP supersites at Auchencorth and Harwell in the ACTRIS Programm

Cape, John Neil

NERC Open Research Archive

UK (CEH) and ACTRISWP3: In-situ chemical, physical and optical properties of aerosols WP4: Trace gases networking: Volatile organic carbon and nitrogen oxidesUK (CEH) and ACTRISWP3: In-situ chemical, physical and optical properties of aerosols   • Implementation of existing and development of new protocols for particle number size distributions and aerosol optical propertiesI l t ti f li d l i f i• mp emen a on o  samp ng an  ana ys s o  organ c and elemental carbon and organic tracers for source identification • Development of measurement protocols for cloud condensation nuclei measurements  UK (CEH) and ACTRISWP4: Trace gases networking: Volatile organic carbon and nitrogen oxides   • integrate and harmonise trace gas measurements in Europe• implement standardised measurement protocols (SOP ) d E lib ti ls  an  common uropean ca ra on sca es for VOCs and NOxy in support of the European EMEP and global GAW strategy and according to        data quality objectives formulated by these initiatives. UK (CEH) and ACTRISWP4: Trace gases networking: Volatile organic carbon and nitrogen oxides   Two UK ‘rural’ sites: Auchencorth and Harwell      ,plus NCAS observatory in Cape Verde IslandsBoth UK sites are EMEP ‘supersites’First round-robin calibrations for NOx and VOCs in progressUK (CEH) and ACTRISAuchencorth: EMEP ‘Level 3’ south ScotlandAvailable for transnational access under ACTRISAUCHENCORTH (UK): CURRENT STATUS (VOC)NMHCs (from 2006)C2: ethane, ethene, ethyneC3: propane, propeneC4 b t i b t 1 3 b t di 1: n‐ u ane,  so u ane,  , ‐ u a ene,  ‐butene, cis/trans‐2‐buteneC5: n‐pentane, isopentane, cis‐2‐pentene, isopreneC6: n‐hexane, 2/3‐methyl pentaneC7+: n‐heptane, n‐octane, isooctaneArom: benzene, toluene, xylenes, trimethyl benzene ethyl benzeneQuality assurance:Instrument: GC‐FID,     Preconcentration: PE TurboMatrixSample volume: 0.6 liter, trap at ‐30 °C, trap material  CarbosorbB/Carbosieve SIIIWater removal: Nafion dryerScale: NPL, ppb standard, 30‐componentsCalibration interval: 4x 1h every 2 wkQuality checks:   routine checks: daily chromatographyfinal checks: quarterlyDatabase: UKAIR, EMEPMeasurement instruction: noOther issues: operated remotely by VNCAUCHENCORTH (UK)  CURRENT STATUS (NOXY)NO NO2 HONO/HNO3instrument/ ECO Physics CLD 770 AL ppt ECO Physics CLD 770 AL ppt MARGA (x2)from 2011 measurement principle O3 chemiluminescence with PLC 760 (Xe-Lamp) Wet denuder/ICscale BOC ppm in N2 Permeation tube Int stdcalibration interval monthly monthly Hourly int.std.quality checks check of chamber temp, pressure, flow, on daily basis; lab journal (electronic)Daily operationcheck; weekly chroatogram checkintercomparisons On-site with thermal converter NOX calibrated from same standardsMonthly with integrating denuderdatabase UKAIR, EMEPmeasurement instruction yes other issues 2 instruments Mo-conv PM2 5 and PM10 (thermal NOx) . .    channelsAUCHENCORTH (UK)  CURRENT STATUS (AEROSOLS)Instrument/ measurement principleSMPS(from May2012)Aethalometer MARGA (x2)Wet denuder/ICQ-AMS (aerosol mass spectrometer)Only during intensive field  campaignsWhat they measureSize distribution of particles in the size range Black carbon(PM2.5)NO3-,SO42-,Cl-,NH4+,Na+,K+, Mg+, Ca2+Chemical speciation and size distribution of non-refractory <1μm particlesfrom 10n to 800 nm(PM10, PM2.5 inlets)Time resolution 1 min 5 min hourly Up to 10Hzdatabase UKAIR, EMEPTime SeriesUK (CEH) and ACTRISHarwell: EMEP ‘Level 2’ south EnglandHARWELL(UK)  CURRENT STATUS (AEROSOLS)Instrument/ measurement principle MARGA (x2)Wet denuder/ICToF-AMS (aerosol mass spectrometer)Only during intensive field icampa gnsWhat they measureNO3-,SO42-,Cl-,NH4+,Na+,K+, Mg+, Ca2+(PM10 PM2 5Chemical speciation and size distribution of non-refractory <1μm particles, .  inlets)Time resolution hourly Up to 10Hzdatabase UKAIR EMEP, 

UK (CEH) and ACTRIS

http://nora.nerc.ac.uk/505427/2/N505427CP.pdf

UK (CEH) and ACTRIS

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