修改稿的cover-letter模板之一recised-cover-letter

1Withthiscoverletter,wewillsubmittherevisedmanuscript(acp-2010-399)entitled,“Relatingtropicaloceancloudstomoistprocessesusingwatervaporisotopemeasurements”forpublicationinAtmosphericChemistryandPhysics.Wewouldliketothankrefereesforthecarefulandconstructivereviews.Basedthecommentsfromthereferees,wehavemadechangesofthemanuscript,whicharedetailedbelow.ReplytotheevaluationbythesecondrefereeThisreviewerpointedouttwothings.Webelievethesetwopointsarerelevanttocommentsfromfirstreviewerandfollowinghis/herminorcomments.1.Table1:Isitvalidtoshowthenumberoflowersensitivitydata?(Specifically,BLCandPCdatafor850-500hPa)Answer:Thispointisrelatedtoouranswertothefirstreferee.PleaseseeourresponsesandAppendixtothefirstreviewerabove.2.Figure1:Whatarethemultiplelinesinthesamecolors?Answer:ThemultiplelinesinthesamecoloraremultipleprofileobservationsinoneTESRunID(5889)exceptprecipitatingclouds(ThreeRunIDs,5889,5918and5948wereneedtoplotmultipleprofileobservations).3.Figure2:Latitude/Longitudeinformationshouldbeadded.Isthisasnapshot?Ifso,thedateshouldbespecified.Answer:Weaddthedateinthefigurecaption.Thegeographicalinformationwasalreadypresentedintheoriginalmanuscript.4.Figure3:Timeinformationshouldbespecifiedinthecaption.WhyCOD/CTPandH2O/dDhavedifferentsamplingfrequencies?Howcanthereaderknowaboutthecloudtypesduringthistimeseries?Answer:InFig.3,cloudproperties(aandb)andwatervapor(candd)havedifferentsamplingfrequenciesbecausewesampledcloudyconditionsforFig.3(a)and(b).Weaddasentenceinfigurecaption.5.Figure4:Isitasnapshot?Seasonalmeanforasingleyear?Climatology?Pleaseclarify.Answer:WementionedsamplingperiodinSection2.2.Isotopiccompositionofwatervapor(δD).Itisnotasnapshot.Itisaseasonalmeanvalue(JunetoAugust,JJA)fromJune2005toAugust2008.6.Abstract:Ithasbeentoldbymanythatthevapor-dDrelationshipiscontrolledbynotonlyRayleighprocessbutalsoothernon-Rayleighprocesses,butnoneofthemhasquantifiedthesignificance.Isitstillimpossibleinthisstudy?2Answer:Itisagoodpoint.OneofthesimplestmodelsforatmosphericwatervaporisotopeisbasedontheRayleighdistillationequation.Severalprocessescouldpotentiallychangetheisotopiccompositionofwatervapor,suchasmixing,subsidenceandre-evaporation(non-Rayleighprocesses)aswedescribedinourmanuscript.Quantifyingthesignificanceisbeyondourscopeofthestudy.However,somestudiesusingremotelysenseddataand/orin-situmeasurementshavebeenusedtoconstrainhumiditydynamicsoflowertroposphere.Forexample,Wordenetal.(2007)quantitativelyshowedthecontributionofrainfallevaporationtolowertropospherichumidity.Galewskyetal.(2007)reproducedtheclear-skyfreetroposphererelativehumidityandD/Hratiosusingamodelthataccountsforlarge-scalecondensation,fractionation,mixingandtransportofwatervapor,whichRayleighdistillationmodelunderpredicted.Galewsky,J.,Strong,M.,andSharp,Z.D.:MeasurementsofwatervaporD/HratiosfromMaunaKea,Hawaii,andimplicationsforsubtropicalhumiditydynamics,Geophys.Res.Lett.,34,L22808,doi:10.1029/2007GL031330,2007.7.P17412top:WhatistheunitofCOD?Answer:CloudOpticalDepthisunit-less.8.P17414bottom:WhydotherangesofthelinesinFig1e-hlinktothesensitivity?Whatistheeachsinglelineinthefigure1e-h?Whatisdifferencebetweenerrorandsensitivityinthiscontext?Answer:Ifthereislittlesensitivity,therewouldbenodifferencebetweenTESaprioriconstraintandanestimate.EachlinerepresentsasingleobservationmeasuredbyTESinFig.1e-h.9.P17415middle:Whatis“step-and-stare”?Describe.Answer:“Step-andStare”isaTESobservationmodeinwhich60measurementsaremadespacedabout35kmapart.“Stare”meanspointataspecificlatitudeandlongitudeforupto210seconds.“Transect”meansasetofexactlycontiguouslatitudesandlongitudesinalineupto885kmlong.Weaddedthedefinitionof“stepandstare”inthemanuscript.Nowitbecomes“ATES“step-and-stare”,whichisasetofnadirfootprintspacedabout35kmapart,wasconductedduringthissametimeandtheapproximateorbitlocationofthissetofobservationsisshownasaverticalredlineovertheMODISimagery.”.10.P17416middle:“lessthan0.1”-NoCODdataislessthan0.1inFigure3.Answer:Fixed.Nowthesentenceis“Near–3°,theairisrelativelydry,approximately1g/kgbutalsoveryisotopicallydepletedunderneathhighcirrus(cloud-toppressurenear200hPa,butcloudopticaldepthlessthan1.0).”.11.P17419bottom:“Thefirstdistributionisforcomparisonagainst...”-Idon’tseeanyclearskyandnon-precipitationclouddistributionsinthefigure6.3Answer:ThesentenceinPage17419,lines28and29seemstobeconfusingsuchthatwehaveaddedmoreinformation.Nowitbecomes“Thefirstdistribution(850-500hPa)isforcomparisonagainsttheclearskyandnonprecipitatingclouddistributionsshowninFig.5andshowsthattheairaboveboundarylayercloudsismoreisotopicallydepletedthanairparcelsassociatedwithclearskyandnonprecipitatingclouds.”.12.P17420:Thisexplanationisparticularlyhardtofollow.Attop,itreads“wellexplainedbylocalmixing”,butatmiddle,itreads“duetolessfrequentmixing”.Whichistrue?Imaymisunderstandit,buttoavoidsuchmisunderstanding,it’dbebetterfortheauthorstomaketheexplanationeasier.Usingschematicfiguresisabsolutelynecessary.Answer:TheTESobservationsshowthattheairaboveboundarylayercloudsisconstrainedbythetwotheoretica