the ameriflux tech team€¦ · • 4-component radiometer (kipp & zonen, cnr4) • sunshine...
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TheAmeriFluxTechTeam
Sebastien–LBNL Chad-OSUSigrid –LBNL Dave-UNLStephen –LBNLHousen–LBNL(notinthepicture)
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AmeriFluxTechTeamsitevisitsWhattoexpectbefore,during,andafterasitevisit
US-KBS
US-EML
US-ICs
US-SO4US-Prr
CA-MerUS-TON
US-AUD
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Purposeandobjectives
Sitevisitshelpmaintainthedataqualityreportedtothenetwork• TechTeamworksinacollaborativeeffortwithsitestaff;• Identifydifferencesinsystemswhetherduetoinstrumentalbias,instrumentalerror,ordataprocessing;
• Sitevisitsareshortterm(~2week),side-by-sidecomparisonsusinganindependentreferencesystemcalledthePortableEddyCovarianceSystem(PECS).
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PECS
Gasanalyzers• ClosedpathCO2/H2OLI-7200IRGA• Open-pathCO2/H2OLI-7500AIRGA• Open-pathCH4LI-7700gasanalyzer
Sonicanemometer• Gill,R3-50
Met.Sensors• AspiratedPlatinumRTD(R.M.Young,41342)• TairandRH(Vaisala,HMP155)• 4-componentradiometer(Kipp&Zonen,CNR4)• Sunshinepyranometer(Delta-T,SPN1)• Up-anddown-wellingPAR(Kipp&Zonen,PQS)• Barometer(VaisalaPTB110)
Dataacquisitionsystem• CPU(EChighfreq.data)• CR1000datalogger(Metdata)• Networking(Cellularmodem)
Powersupply• Linepower;• Gasgenerator• Solarpanels/batteries
sitevisit(~2weeks)preparation wrapup5
Schedulingandlogistics
Sitesenvisagedareselectedduringwinter(Dec-Feb)• ContactTechTeamtorequestsitevisit• Initialcontact–gaugeinterest/availability,discusspossibledateranges;
• Follow-up–confirmdates;• Sendsitevisitquestionnaire.
Logistics• TechTeamarrangeslodgingandtransportoptions;• AllcostsofvisitarecoveredbytheAMP.
sitevisit(~2weeks)preparation wrapup6
Justpriortovisit
Forsitestaff:• Ensuresiteaccessandnormalsiteoperations(data,power,communications,etc).
ForTechTeam:• Shipequipment(10-16largecases,500+lbs)• Contactstaffandconfirmarrivalandsiteaccessdates/plans;
• Fallprotectionpermit(ifnecessary);• Checkweather;• Rentappropriatevehicle.
sitevisit(~2weeks)preparation wrapup7
Uponarrival
• Meetsitestaff;• Pickupequipment,purchasesupplies(dist.H2O;oil,fuel,etc.);• Calibrategasanalyzers:• Willusuallyoccurthedaypriortosetup;• Preferlabsettingtoconductcalibration,ifavailable.• Benchtopandpoweroutlet.
sitevisit(~2weeks)preparation wrapup8
Setupday
• Meetsitestaffatsite;• Discusssitesafetyandrules;• Siteorientation;• DiscussAmeriFluxsetupplans:• Minimizeinterferingwithsiteoperations/instrumentation;
• FindoptimallocationforPECSinstruments;
• TechTeamcanusuallycompleteinstallationinasingleday;
• Aftersetupcomplete,TechTeamwilldocumentandphotograph.
sitevisit(~2weeks)preparation wrapup9
Duringvisit
• TechTeamremainlocalfordurationofvisit:• MonitorPECSandensuredatacontinuity;
• Maycollectadditionalobservations• HelpwithBADMandlinkwithDatateam;• Availableforconsultingwithsiteteam.
• Mid-visitcomparison• Preliminarydatacomparisonbetweensystemswillbeconductedandsharedwithsitestaff;
• Valuableopportunitytoidentifyissuesandresolvepriortoendofcomparison.
sitevisit(~2weeks)preparation wrapup10
Takedownday
• TechTeammayrequestsitestaffassistance;
• Post-visitcalibrationofgasanalyzersmaybeperformed;
• TechTeamwillarrangetransportationandshipmentofequipment(butassistanceappreciated!).
sitevisit(~2weeks)preparation wrapup11
Postvisit–datasharing
• Filesshouldincludeheaders,units,metadata;• Descriptionofprocessingsteps,algorithms,andcorrectionsapplied.Don’tassumeweknow.
• Donotgapfilldata.• Highfrequencydata:• TechTeamwillconductindependentdataprocessing;• Sharedfoldercanbeprovided(i.e.Dropbox).
• 30minuteprocesseddata:• Fluxes,covariances,correctionterms;• Statistics(mean,variance)forhighfrequencyvariables;• Meteorological,radiation,ancillarydata.
sitevisit(~2weeks)preparation wrapup12
TechTeamreports
• Sitevisitreportssharedwithsitestaff,providingkeyrecommendations;Extensivecomparisons,analysis;
• Sitebenchmarkedagainstcumulativerecordofsitevisits;• TechTeamdataavailableuponrequest;• Feedbackfromsitestaffrequested.
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PortableProfileSystemTheAmeriFluxportableprofilesystem(PPS)isanewsupportcapabilitytoemphasizetheimportanceofcanopystorage.• PPSprovidesahighqualityreferenceofverticalgradientsand
storagefortheNetwork.TheTechTeamiscurrentlydevelopingevaluationmetricsandcomparisonmethodologies.
• PPScanbedeployedindependentlyofasitevisittoaidsitesinevaluatingcanopystorageorprofilesystemdesign(inletheights,samplingfrequency,etc).Additionalinformationincludingfull
partslistavailableontheAmeriFluxwebpage.
CO2(storage)profilesystem• LI-840ACO2/H2OIRGA• CR6datalogger• Referencegases
SupportServices
• TheseservicesareprovidedtoAmeriFluxsiteteamstofacilitatesiteoperationsandmaximizedataquality.Formostcases,theseareprovidedatnocosttoAmeriFluxsites(returnshippingexcepted).• Calibrationgases• Photosyntheticallyactiveradiation(PAR)sensors• Loanerinstruments• Portableprofilesystem• RapidResponsesystem
sitevisit(~2weeks)preparation wrapup15
Contacts
AmeriFlux:https://ameriflux.lbl.gov/AmeriFluxTechTeam:[email protected].