AIR MASS ANALYSIS 
174 
‘SodVFINS G ( QOOT PUS ONG 24} AOF UMVAP SOUI[UTeIT4S 
Aq pojuesordea sev ‘souoroyip Sty} AT[VolyEWoyoS SozVorpUr (19 ‘d ‘6g6e ‘T ou ‘ZT ‘A ‘AizdraT “ay *78sUy ‘shyd 
-005) ‘dafA ‘UURWIYSIEM pus UsWT[eq “OUP ‘souyaelg Wory) G ‘Sly ‘Xoyt0A deep oy} 0} 4SeazUOd Yue{roduIT 
UL O48 OSOY} UL SUOT}IpuoD ALe-toddn oYy, “MOT[VYS JoY}er O18 ‘adoiny pue seqyv}g poxluy) UL SUOTJOeS-Sso.1d 
Ajvep oy ut ves Ajjuenbety oM SB YONS “Are plod FO .,Se4}0[Bd,, 10 sospoM pue souopasod oAemM-[e}UOTF oY} Jo AuBUT 
‘TAAOMOF ‘S[OAI] YSIY 0} SUIYOveL X0}IOA SUIPN[DI0 puB Suluodeep Ajpidear @ osanod Fo SVM SIYT, “WY ) Moped 
saoke] oy} FO oinzeroduto} UL [[VF DOT 94 .€ 4} FO ayids ul qui oT Aq [[eF 0} oAnssead oovzans ay} esned 04 
ysnouo SVM WY GT pue J, UsaMyoq oinyerodwio} Fo osit oy, {WH OT OF ST WB GW E FO osvotoUL WINUIXBI pue 
Wy 9 7 GU ET FO oSvotoOp WNUIxBU B 07 SJUNOWR 4QYsII oY} Ye UMBIp SB aAe] yoRe 7B YIST 0} ZT IY} Wor 
ginsseid ul osuvyo oy, “Apeosje deep Wy g ST Ale plod ey} pues YT PY} Aol[1vo poessed pey (ysnor, suo, ®@) 
qUOAT poo oy, ‘ou WAV B SUIDR[dor SI oLoYydsodo.zy pjoo ueyM (9.61 4q) exeydsoqe.4s Jo sulmseMm pue (Wy 7 
kq) osnedodo.sy} fo Sutsemoy [eordAy oy} YAM ‘osuRYyo poytvU B MOYS (YET pue YIZL) Javde sanoy ET Fo sour 
-punos oy} ‘pur[sug ‘puvyeeg yy ‘e[droutid oy} seyerysny[E Yom “ZE6T ‘eT-ZT “400 ‘Wa404S Toyjoue TOF SITY} OUOP 
sey (Just ‘p “SIyZ) WeYysol] UBA ‘ASBd B YONS UL ooBZANS oY} 7B aainssoad UL [[BF OY 07 poyNgi4jUoOd [aAo] YI 7B 
sosueyo oinjeroduis, oy} YONUL MOY dAINDUI 0} 4So10JUT JO ST FT “WH GT 1eA0 04 poounouoid AtoA SI UOT}yeqany4 
-19d oy} Jey} ojyou 4ynq ‘seuopoAd UT [VNSN se ‘S[OAR] LOYSIY 4B 1048] poaArse aInssoid JSoMO] OUT, *(4F°[) FP II 
oz 23 43 2 47!9 
ae) 
a= lsalael 
gl 
or Ci-sw 088 
i gens 
IHIVTO, 
meh, 
-uny'y 
! 77 D/ISON) 
AFI SOLON, 
I 61 — Fs 
Vigne =) ap 
ae 207 FhOllbRh 
bod 
Oey 28) O76 
"] O4,L1 el a7 
9 BE6l 7UBROsIO aNV 7V ye? 
ewe =~ 
| 
ie 
SE6T MFIMAZ E17? 91 
ures shown in 
old and warm 
esumably this 
of the feat 
hen both e 
though pr 
many occasions Ww 
o the tropopause, 
b 
ly reach t 
Bergeron’s model (see p. 122) incorporates most 
There are, however 
these examples. 
fronts of a system apparent 
States) 
The 
hern United 
(sout 
he tropopause is normally lower. 
idely remarked, moreover. 
iddle latitudes 
occurs less commonly in the lower mi 
than farther north (Europe) where t 
rarity of fronts above 5 km or so is wi 
