NASA-TM-113032 Modulatio. of Cloud Optical Properties by Vertical Circulations Associated With a Jet Slreak Exit Region: The November 26 FIRE Cirrus Case Study Gerald G. Mace Department of Meteorology The Pennsylvania State Uzxiversity I University Park, Pennsylvania [ Ii David O'C. Starr NASA Goddard Space Flight Center Greenbelt, Maryland Patrick Mirmis NASA Langley Research Center Hampton, Virginia Thomas P. Ackerman The Pennsylvania State University University Park, Pennsylvania Proceedings of AMS 8th Conference on Atmospheric Radiation Nashville, Tennessee January 23-28, 1994 Modulation of Cloud Optical r'r,lp,:rtlen by VertictllOirculationnAeaociatetl With n .l,:t Stz'eult Exit ll,:l;iOn: The Nuvomber 26 Flltl_ Cirrus Citee Study Oernhl (3. Mocu i , D,ivid O'C Stm'r 2, Ptdrlck MinniA 3, Thonlntt P. Axk_r,llm 1 !lll:llnl Itnent of Mel.ellr.lngy, The lJenlioy} vlinln Bl.nbe Unlvorulty, l.hllvnilil.y l'lil'k, I'A IGSU2 7CIhnnte t_lld lhldi,,th_li llraneldCodt) 91{t, ]qASA GSP(2, (3l_unL_lt, bid 207_/1 .IAtillunllheric gcio.ncos l-)ivJ_lon, NASA I.AIIC, Iinlnpton, VA 23605-6226 The iniddltt nlid Ullpor ti_ll)tiiIplieiie I. Inltr,_du,:tlon eluutl bnnll thnt wtlrl onlnplt_d t|tlrJli_ tho Iocni nl_orlli')on (,if 2(] Noveill|ier lgOl wllu cl.uidy The peilod I'rtun .18 tJ'l'(; 2G HtlVOliib_i" coui,Iod to thll llyllolltlc lierile dyn IIIII it'll 1091 Io roughly 2,1 IJTC Ill _lJVl:lii|l_l" 1001 hnl_ _lnboddod hi the oxit rugloli tip a ltti'ong bl':colllc IIlilClll I.:lil#ll Iltlllly or tllo Pllt_ Cin'utt-II lifll-thwotllerly.il_t ntrellill. The Jot e.xlendl_d frtiln lield tuilllllllgn- 'l'hu Ini_hlle nnil upQer It rldgo hi the nol411wellloril l.hlil_d _till_.n I.i,}l),lrll)hCl ie tl,_utl ,Inlli thnt wl_io collL,r.t_.d htlve _mnlhei_otwilrd ililo thn Texllll l>tinhilndl I_, A.jut idl,lwod FIRE I_eiciilitiL_l II) Inni'li n IIient tlulll utl-uuk of 63 Ill II"I %V_IB lll'Olinglithlt l nllrlll [ thl.t iiiui lihiilnl'icnl BtrtlCtlll'e and nouthennl.wilrd nttnr the flow inllectloll pulnt in nliclophy_tlrnl nnd railiutlvf) chrn'nctel'itltic.s of enlitorli Colorndm hnmetlintely tlowllnl.rP.nnl of the n_hl.lntitudo tier-, thnt o¢¢tlrlut_ Ihll'ilil_ thf} jt'.t cilrl2, li dil}ul#ill, {l'Ollgll tlxitl uxl_.lidlJd thill I.inllL Aii illipoltillil, c,)lllilOlierlt of tlli_ frOlli ttllltt.oril '|'elatl northwilrd iilto the lJnktihl_. cffnil, irl dl3t.Orlllillllig thP. Oylll}jltlc i_cnleforcing Annlynio of tll_ g_nl)Otentinl |lUil_ht I]eld {llot Ihllt esi.le.d duiJnlf thi_ thne. liy [orehlll, we uhuwn) 8howo thut tliu Ii_ill_ll liXili Ilild n w_ll iill_nli Iho COUliliilg between till, lltl_k[,ll"fllllitl dnllnod noutlit_nl_l.-noithwl_ut tilt. Thi_ nil.nalilln vc,Itic,,l nir innllono niill I.h_. ]nrl_e nctll_ illolsl.lii'_ bnl'll'B Ittrolil_ rellOlllblnni:o txl rl chllliliC dl_BClJl)lJon Im,lfjo.t tlult jliil:in_d lint] liliiilll_lhiP.i] tlrrutl Of II11 Illll_-I" jet-li'ullt Ityn|oln l)lllllllltlll iII1_ chjiill in the i;hidy tl:_lln. I)cllliinlg I.hll ltyllnlllie through ill llyliOlllri¢ llellll) btirt_ellnlc wnve Ilcilll.i I'Ui,:Jll_ it1 llllO I.l{" I.li,.' Idnled llclellll.;l_c iJrllseuted by Shllpiro (1003) and l_y_r nn(1 nbjce{ivell Iff tl._ FiIIB llrogrnin. Slinplr_ (1007). Thi_ lttlltle of develolinlenl iti It i_ Moo necc,_llly, hntn tlio ul-lllldl)oint I;Inrkod by btu-otruplc llnllllillcntion tllrti'llth the ill infidel vlllltllltlml, thnt tht) vttitlcnl motlontl till hi the height litdd ltlld by bl_roclhllc lind ]liltJl'. ncnlr, inoisttil'n lludlet of till9 cnle nmlllilientlun indicnted by the wenk cold _l._i{ly I)c deilwd dlreetly lioin obnel.i'nlillnll i.tl. ndvoetion hi the northwe_torly 0ow (Key_er imd illdl_lJt, lit|,jljl, tit lilOdol-blltll31l dalai nnuhnihitloll. Shnlilro , 1987). TlJn nnIplilicittltin lJi_J(:elt_l in %V4conrthler it hnl_or LllnL thilt tll_ ill¢l¢iohl utlod dillpltiyod (lnit-e- nlnikedly by exninhiinl_ thtr Ix) oiinulole tile llbnervod clolid I_iehln I)t,gili wlth llvoltil.hln (if Uie dynaluiCl lietwlluli 11}UTC niid tli_ ctiil_.'¢t d..vntillii c-_jrind thnt thtl dylinlili(:fl I)e 21 UTC. Fig. 1 nhowu vertle,I chat-west cities in tll_ illlit I)lll¢ x_"for tll_ rlKhl. I-en_on_. _uctlo,e of relative vortlclty at 18 mid 21 UTC. Wc hnvo eoitlhhlcd hourly Wind Pl_)liler The etx),i _eetlon_ exlend hvni tbe jet elll'e in 1)cinrtnlilintlull NP.tWOl'k dnlai (Chndwiek tit till uuuthltilltlx_i'n Coh)rilt|o ncnlle the trol.ilth Itlfjn i!_86) with rliwilil;Olitll_ f]lll/I l)roeOltlJlall nt hill nllrth o{"tllt_ l{Jliil_tlll-()kl_holnll border lind inlo v,_l-tic.nl rellolutloll Io ¢i_nlo obj_,:tlve nntalyuoi of tl,o djl_lle.lit l.OliO |it wltltorn Minuourl. "11_. {he _yllol)li¢ 0tnlt_ fiehl_, l/t_hig tljngilo#th:ll Vol'tieity pntlerl) _howo It region nf cyclonic tleiiv_d 171lilt th_ objectively iililllylcd dtitu (illd v.rtlclty oxl_.ndhlg through the depth of tl)e I bulk cl,lutl opti_.nl priip_itlen dcl x_,riliili_ld I'lxlnl I IJ-opo_phere nlltl Mtunled from the .let con: II _ulljlilnl.innni_' oiltelllt_, dlltl_, we will infl_r cnntwurd into the difluent tro,gh with iijl_:lncti_lilU b_twecn tile Itiig_J t}l;alc forcililt alld lnllxjlonnl amplitude n_nr 10 kin. Tllt_ vui-tlcity the bulk i-]rllicl opticld IJlOI 1Ort'iO.fl. pllttorn bttnl_ tl ntrlklng rlstletlllllntlce to th,t fOtuill ill mobilu tipper troplll_llllurlc tlnughn (Snndor., 1981q; Whilidttlr tilit| ]B{lreilon, 1992), 2. The I,h)v_l.bor 26th ('noe Sttldy i I :_74 I_-_"'___ _ - -'-'-'-'__.._iI'° '_l.'$ \ ,, . .. _ __.._..,.ti.D ml , -- !i.,|., I,,!, 'l.! l.t .ii ' _ 11.5 I.) /" . i F.O it ;: _'_ _ 1.0 I,I l.qP i,lm " 1.1 'J"'J 12J l.I q.O 1,1 __¢" ......._:_...__ I1.l0l 'Ie.'g,$ LLLJLLI_L.LLIJJ-ILI I I_IJ.I_JLLI I1I II II III |I,.L.LI_ _0_0 J,IJ.l.l,.JJ !I II II II I tII IlJJ_ I.IP Fill. I. (;ro._ ,jocliljill, ill t.lln verllcill coli)l)Oile ill of Lhq; rolllLivo voiliclty for n) 18 U']'C _O 14(lv. i_j .i,,1 I_) 21 U'L'E: 71j N_v. _l. 'l'lio crofl_ nocii_nri exTiz_l in itli _.tlL we_L IiIi_. rl_lll .qlllnLll-e_,nlrix[ (Ti.lltll ll,l_l t_ rlrlii{ll_vell{_rli ]_li_o_ii4. Unillt lift3 in ]1.0"1i n"1 llllCl ril_li.ilLiYo villlll..ll I llll3 nllll(l_d. I I 1'lie _.vrillilillil of {lie vovi.icity jJllliol'll I'iftilll_ iliolllJli ovof itoIIl.]iw_tl_l-lFI ]liwll, A l]llCk i n.,_rlci_ll:(I wilh lll_. Jel.-LlOillJll llylit_lll il_ ¢leili']# hitll(] of ciil'lllt oxl,l_.iliJo I] tiOlltliwellLwnid inlll e_oL_r_ltl dltrliit_, Lli_ [hreo )llj_ll" llr'.rlrl(|. ']'ho illOlil_ t,he toni.rill I_llltlli oJ" tho ¢lrllid bixlit]. lllill_lil,llCl_, o[ lll_ (|irll, iiihnn¢_. IlJJlit_lll9 Lrl 'l'hlli _irrtl_l oxl_l_(l_.il nrllil.hwllft| hlto Oklrlilltlilrl. d_eiellllo I.lc_l.wl_r_il 4 _lll(I (Jkiii wll;Io _ oil_ililic"lil- lcly 71 tJ'i'(] ol)li_"l dt_l_l-hn nil nlnllt_ lli_ _l_lll I lliillllli/i;rll.irlll ii! licl|lll] l)_tw_.li B tllltl 1_- kill, I)ltnll ghowrlil II oil_rlilicillil, r_lltllrlilrl_ till illt_ 'Hie 11Ol4.tlv_- vlliticil)' vllhi,._l# ill llln |]_nlklnll tlvl_lvin I vl:rliclll ilioLi£111 pril.lelli. Tllllt ;e i_llolli liill_llilx_ly l-i_ll_l_ll tlhijlv little, chnlill-t .lljllo fi't_ill ovltltlliL llvl_r ()tl]lililllllll. "rilo _#iell_._ui_.i ilil t_illitwvlrl] lii_'91_,leriltiOll tlllpiiIlf Lhe l_riutl, pl.OplllJixtlUli u£ the ll_lililerll I)t_lt;oil_l nit the 'l'he v_it;_-I w.l.clty wil_ _llh:lll_ll_d I_o n ¢io-d l)lliill lii'o ¢]oilrl_y evll]Olll _lfl_l lilld ItOt)ti ie_ll.hj01l _lolrl Ill_ Iir.l ).w hi" lhelliiOdyLIrli.i_rl ¢llri-i_]lllil_li heLweOll the lllt:ptlllnilll_ i_pli¢ill ..irlllliilllnll_ llCl]ilhiltlc II.w. IieilUile nL 0.8 kin rlrtl ill, lit]in ill ()kiilliOUlitl llilll Lho inci'Olli!illl_ v_lli¢_l _ih(iwil lii l_il_. _. ^L 18 I.JTI]'., _rlk lilrlJO lll_llitl lllot.irlnil li{ I_,_ i<ill. 'i']io ilil_relllte ill .pLienl lil_l;P.ill, ill _iilllliO" (-_i] in _ hi_li_ IhllL oxtoncJo cll_ilih_! o_of ol)ul.hwctlill_llil lo_rl iliio llZl_l_hll_li ilrlll{ll_w._tw,_i<] |nonl . I_,nl liln×iinulii in _il,h lililll-p_Y )n)'l_.r liliWiilti liil_lioll lleL_rl 7 ti_lti{llwl:r_l_.ln low]l, .,_{ 7 1 tJ'l'_ i]lo er_lll_r o1" .lit| l0 k.in (noL llhowli), _lpIill ill i_llil{ll_l_l_.lli ]_wll (]_.i_.n_.n olillhily Jjl i_lll:il_ily, l_lrlllwll/'i'_, nlllplilielll.loil ot" tho 3, ("jnchloiolll_ #._ll_. -_ w_.ll ._ Ill. i_.l_i_ll oroLrolIK _llliniiln._. 'l'lie ovllltll;Oil I_f lho _luliti it)'lill_.lli c_lll_lOti t_li tll_ I(zlnlllill-Nl|ii'rllll(n bl-iI'l]oi', 1lie exlxlilo]vely olinor'vlld Oil 10 ]l_loVrtlill)_r till] I...t tllJV.,lil,¢] yi_.i'li£.li| ilit)illJll illOlO thllll (|titlblolt ovor s_tlil Nil o rollj3@i16t# Ll'l ioi'LIcll] ¢irutillll,lolllt illonl of ei_rtlt_ill Ok]nllqpliiil _;lll lll_. _lli_lr uP nnn_ii_l_! wlLh llyllollLi¢ ecilltt l'l.lix:iill_- ./in th_ riliilil ii)olicin llvl_r tile ll_.l] ]Liver i_hrll_rilll_ rilpi_Y nrlvnilcliil jot eltenk plll31iol] the llow i,vlrl_.ileeol, llllL_rli,llllrOl)ill_llt;oil" iii[locLioll lllll L nl't_r _.l:l _1_, Lllo oyr!.l_in 'i'l-" I_npoiifltt or Lli_ ¢lnud elii_]ll L_ tllo hl._.Ule 1)i_lliopl_o_ tl Ixl Jnl_o o¢oio llllilJ]ilJ _nt_irlil eyiln]_lic i,¢illt# rO)'Cill_' ClXll )JU til_l_.ll ])y OlilillJllill_ Llil_litlii Lile OT_elll_lLiilrl Of Lbo Ll'Oll_h I_l]8 Ulld I._ilt. tt whlcli rlhrlwll Ill_ hlffh ¢lq)tiil vi_illlo opLi¢lil _i_l rill" ncly_¢llt_ii. 711o oLl'tlnK i_rillll_ilt ill tl_lllh (]_iilliJtt, l!)fl0) nL 18 l./_('J nild 2l UI'(I, voloclLy ili_lu_.d LhrlL pllrco]. 63zjLilll_ lho I_lL w_re At ]El l_Yrl_ tll_ llil_li _ltlliclrl wilh {li_ ]nl_.oL ,liOlil_lY ni_ooolroi_lii_ ._i Lilly pll_t_l_tl iill,_ lll_. lllJllt!i_l _l_plhll wen t__..qr_.i_t_d with I,]l_, Celitlzr of iiiflunrlL lrl_ultl), ! / ..... Pig. 2. Adinhlllic v,_l licnl velocity ill 6.5 km for n) 18 LITC 26 Hov. 91 nnll h) 71 UTC 70 Nov. Y[, (:_tJiil_lilln hie ili 121111"t][ --.---?:--_3< '_-_, - . '"_ ___]_-_ L8 Vil_. 3. ltip, h ¢hlud vluible ol)tic_l doplh del_i'rlilllp.II l'r£1in gc,onl-nLinnilry _lll_llil_ dntxi, n) U'I'(] 76 Nl_v. 199[, b) 21 tJTC 26 Nov. 1991. the vertical circuhltloll_ thnL oxiuL in ¢ili_d JeL flnwa. 'lqli_ coillolil.luli in nupporl_d lly I_iimin*tic nllaly_i_ of wind prclfilel" dnLn thut Acknowll._lglueil_: Thi_ rououlxl) wne mipl_lriod _llow_ ili¢lellnli)l_ liplior {mllil_pll_ilc OiYel-geilc_ in lJerL l,y HASA grlliitR HA(?,-1-1095 lllitl l_IJ(i -- duriiig thi_ period, Tile inliilOliC# of Li'_ector.lt' J-ligg tilli4 by DOF_ gl'lillt DE.FGO2-O0Elff31O71. _lil-Vfltilrl2 likely plnyed llll iUiliOi'Lnnt r_)ltl ill th_ Thi_ work wl_ tlol_e while ono _)f u_ (GM) held a riiLher nuddtlll nlill'lllt'icatitlll of tile iorliclll N/uSA Goddnrd Gruduilte Student Fellowoh;p. ilio{iOli jllitLt_lil ilild t_tliil-.l'llllitglnL iiiotiillll_llll o[" th_ cloud {_l,th:.l pi'Ol >el'ih_u' A_I Illiot_li by ]l,o ftir eli clan (;llillliilll0 nlld l{lllll¢)lid (1fl89), ntlvec:.tion of trl%j_clfliy ¢lli-yll[llle ¢nn uillilifJl:rllltlY oliliilli_t_ Avil|lulll,; upon ixtquo_t.