Thunderstormsandatmosphericcomposi1on:Amee1ngofcloudphysics,dynamics,lightningandchemistry

MaryC.BarthAtmosphericChemistryObserva1onsandModeling

MesoscaleandMicroscaleMeteorologyNa1onalCenterforAtmosphericResearch,Boulder,Colorado

1.  AGUEosEditor’sVox:Connec&ngThunderstormsandClimateThroughOzone2.  Lab.Aerologie,Toulouseseminar:RoleofThunderstormsonUpperTroposphereOzone–

WhatWeHaveLearnedfromDC33.  IGACconferencetalk:RoleofThunderstormsonUpperTroposphereOzone–WhatWe

HaveLearnedfromDC34.  AGUmee1ngtalk:AnalysisandModelingofTraceGasesinSevereConvec&on:

The22June2012DC3Case5.  AMSmee1ngtalk:AnalysisandModelingofTraceGasesinSevereConvec&on:

The22June2012DC3Case6.  TexasA&Mseminar:RoleofThunderstormsontheComposi&onoftheTroposphere–What

WeHaveLearnedfromDC37.  U.Michiganseminar:ThunderstormsandAtmosphericComposi&on:AMee&ngofCloud

Physics,Dynamics,LightningandChemistry8.  NCARDayofDiscoveryandNetworkingThunderstormsandAtmosphericComposi&on:A

Mee&ngofCloudPhysics,Dynamics,LightningandChemistry

Who is the audience?

What do they know already?

Thunderstormsandatmosphericcomposi1on:Amee1ngofcloudphysics,dynamics,lightningandchemistry

MaryC.BarthAtmosphericChemistryObserva1onsandModeling

MesoscaleandMicroscaleMeteorologyNa1onalCenterforAtmosphericResearch,Boulder,Colorado

1.  AGUEosEditor’sVox:Connec&ngThunderstormsandClimateThroughOzone2.  Lab.Aerologie,Toulouseseminar:RoleofThunderstormsonUpperTroposphereOzone–

WhatWeHaveLearnedfromDC33.  IGACconferencetalk:RoleofThunderstormsonUpperTroposphereOzone–WhatWe

HaveLearnedfromDC34.  AGUmee1ngtalk:AnalysisandModelingofTraceGasesinSevereConvec&on:

The22June2012DC3Case5.  AMSmee1ngtalk:AnalysisandModelingofTraceGasesinSevereConvec&on:

The22June2012DC3Case6.  TexasA&Mseminar:RoleofThunderstormsontheComposi&onoftheTroposphere–What

WeHaveLearnedfromDC37.  U.Michiganseminar:ThunderstormsandAtmosphericComposi&on:AMee&ngofCloud

Physics,Dynamics,LightningandChemistry8.  NCARDayofDiscoveryandNetworkingThunderstormsandAtmosphericComposi&on:A

Mee&ngofCloudPhysics,Dynamics,LightningandChemistry

Geoscien1stsAtmosphericScien1stsAtmosphericChemistsAtmosphericScien1stsAtmosphericChemistsDept.AtmosphericScien1stsDept.ClimateandSpaceSciencesandEngineeringUpperAtmosphere,Climate,Weather,ChemistryScien1stsAdministrators,SoXwareEngineers,…

DeepConvec*veCloudsandChemistry(DC3)FieldProject•  SupportedbyNSF,NASA,DLR•  DC3co-PrincipalInves1gators:ChrisCantrell,SteveRutledge,BillBrune,JimCrawford,HeidiHuntrieser(DLR)•  DC3ScienceTeamandLogis1calSupport

Thunderstormsandatmosphericcomposi1on:Amee1ngofcloudphysics,dynamics,lightningandchemistry

Acknowledgements First

Why?

It is important to thank the funding

agencies.

It is better to end with your summary

as the last slide.

DeepConvec*veCloudsandChemistry(DC3)FieldProject•  SupportedbyNSF,NASA,DLR•  DC3co-PrincipalInves1gators:ChrisCantrell,SteveRutledge,BillBrune,JimCrawford,HeidiHuntrieser(DLR)•  DC3ScienceTeamandLogis1calSupport

Thunderstormsandatmosphericcomposi1on:Amee1ngofcloudphysics,dynamics,lightningandchemistry

NitrogenOxides(NOx=NO+NO2)Vola1leOrganicCompounds(VOCs) Ozone(O3)

Basic Definition That Audience Should

be Familiar with

(start with something the audience should know)

Amee1ngofcloudphysics,dynamics,lightningandchemistry

CH2O,H2O2,CH3OOH,NOx,O3

Importantozoneprecursorsthataresoluble:CH2O=formaldehydeH2O2=hydrogenperoxideCH3OOH=methylhydrogenperoxide

CH2O,H2O2,CH3OOHandothersolubletracegasesandaerosols

CloudPhysics

Wetdeposi1on

Define acronyms in writing

Say full name

Amee1ngofcloudphysics,dynamics,lightningandchemistry

CH2O,H2O2,CH3OOH,NOx,O3

CH2O,H2O2,CH3OOHandothersolubletracegasesandaerosols Importantozoneprecursorsthataresoluble:

CH2O=formaldehydeH2O2=hydrogenperoxideCH3OOH=methylhydrogenperoxide

Wetdeposi1on

Photochemically-ac1veplumesCH2O,H2O2,CH3OOH,otherVOCs,NOxàO3GHGinUpperTroposphere

TransportLightning-produc1on

ofNOxNo Outline!

For short talks

Wearepredysuretheoutlineisthis:1.  Introduc1on/Mo1va1on2.  Methods3.  Results4.  Conclusions

DeepConvec1veCloudsandChemistry(DC3)FieldExperimentAimedtoLearnHowThunderstormsAffecttheComposi1onofthe

Troposphere

May–June2012SampledStormsin•  NortheastColorado•  WestTexastoCentral

Oklahoma•  NorthernAlabama

OverviewPaper:Barthetal.(2015)BAMS DC3SpecialIssueinJGR

•  Weatherballoonstocharacterizestormenvironment•  RadarsandLightningMappingArraystocharacterizestormandlightning•  AircraXtocharacterizecomposi1onintheinflowandoujlowregionsofstorm

Supplemental Information at the

bottom which is usually harder to see by

the audience

Reten1onofMethylHydrogenPeroxideinFreezingDrops

à WRF-Chemsimula1onalsopredictsCH3OOHscavengingefficienciesgreaterthanexpected(<10%)

à CH3OOHscavengingefficiencyvarieswithicereten1onfactor

50-100%CH3OOHretained

H2O2reten1onfactor<25%

CH2Oreten1onfactor<10%

Observation results from Fried et al. (2016) and Barth et al. (2016)

88%77%67%

May21airmassMay29severeJune11MCS

WRF-Chemresults

Observa1ons:

Belaetal.(2016andinprepara1on)

Be sure axes labels can be read

(these are too small)

Reten1onofMethylHydrogenPeroxideinFreezingDrops

à WRF-Chemsimula1onalsopredictsCH3OOHscavengingefficienciesgreaterthanexpected(<10%)

à CH3OOHscavengingefficiencyvarieswithicereten1onfactor

50-100%CH3OOHretained

H2O2reten1onfactor<25%

CH2Oreten1onfactor<10%

Observation results from Fried et al. (2016) and Barth et al. (2016)

88%77%67%

CH3OOHscavengingefficiency

May21airmassMay29severeJune11MCS

WRF-Chemresults

Observa1ons:

Belaetal.(2016andinprepara1on)

Reten1

onFactor(%)

Be sure axes labels can be read

(these have text boxes placed on top)

Thunderstormsandatmosphericcomposi1on:Amee1ngofcloudphysics,dynamics,lightningandchemistry

1.  Inseverethunderstorms,somevola1leorganiccompoundsarescavengedbythunderstormsmorethanexpectedàCloudphysicalprocessescouldberesponsible

2.  Lightningflashratesarehardtopredict,affec1nges1matesoflightning-NOxproduc1on

3.  Lightning-NOxproduc1oncouldbeinfluencedbythesizeofthelightningflash

4.  Ozoneischemicallyproducedinconvec1veoujlowregions,butsmall-scalemixingfromthestratospherealsoputsozoneintotheuppertroposphere

Ozoneisagreenhousegasintheuppertroposphere

Last slide contains your conclusions

Why?

(allows audience to read them during questions)

Thank you!

Summary•  Whoistheaudience?Whatdotheyknowalready?

–  Helpstoconnectaudiencetoyourtopic•  Acknowledgementsfirst–notthelastslide•  Beginwithsomethingeveryoneisfamiliarwith

–  Helpstoconnectaudiencetoyourtopic•  Nooutlineforshorttalks–Saves1me•  Supplementalinforma1onatbodomofslide

–  Bodomofslidemaynotbeseenbyeveryone•  Makeiteasyforaudiencetoreadslides

--Axeslabelslargeenoughtobereadbyaudience--Darkledersonlightbackground/lightledersondarkbackground--Defineacronymsinwri1ngaswellassayingthefullname

•  Lastslideshouldbeyoursummary(3pointsatmost)–  Allowsaudiencetoreadduringques1onandanswerperiod

•  Keepslidessimple(determinemainpointandshowonlywhatsupportsyourpoint)

•  Keeppresenta*onsimple(tellastorywith1-2mainpoints)•  Beexcitedaboutyourwork(ifyouarenotexcited,whowillbe?)