`\ Andre Lehre H 0B d MbP?"*+_%1 Geneva1 Geneva1 Geneva1 Geneva1 Geneva1 Helv1 Helv1 Geneva1 Geneva87Blaney-Criddle Estimate of Potential Evapotranspiration&?'?(?)?Mz,, ~ b yg(,, d'@ @V General00.00#,##0 #,##0.00#,##0_);\(#,##0\)#,##0_);[Red]\(#,##0\)#,##0.00_);\(#,##0.00\)#,##0.00_);[Red]\(#,##0.00\)"$"#,##0_);\("$"#,##0\)"$"#,##0_);[Red]\("$"#,##0\) "$"#,##0.00_);\("$"#,##0.00\)%""$"#,##0.00_);[Red]\("$"#,##0.00\)0%0.00% 0.00E+00 #\ ?/? #\ ??/?? m/d/yy  d\-mmm\-yy d\-mmm mmm\-yy h:mm\ AM/PMh:mm:ss\ AM/PMh:mm h:mm:ss m/d/yy\ h:mm0.00.000 d-%    hem,k-% lat,N_10--8N_20--8N_30--8N_40--8N_50--8N_60--8N_70--8PET_in-%PET_mm-% -'  S_10--8S_20--8 S_30--8 S_40--8 S_50--8 Ta-%TaF-%_0--8_00--8_0N-<G_0S-<G_1N-<G_1S-<G_2N-<G_2S-<G _3N-<G_3S-<G _4N-<G_4S-<G _5N-<G_6N-<GcC C  C  C  C  C C C C C C C C C C C  C  C  C  C  C  C !C !C  C "C "C  C !C !C !C "C "<C "C "C "C "C "C "C &C *U } }  } }   H  X @zB @ @ @ @{    @     @ % %@ )@ + 2  o P8@|  A D     @!                    Site:  Crop:  Latitude:  Hemisphere:  & mean air temp&)'!fraction of annual daylight hours crop factor&Blaney-Criddle estimate&  month Ta Ta d k PET PET  F C mm in Jan  rq1!"%C  (\µ?!%c  c_c+bs0b_cIbsc\bclcwbsa!0 8c_0cbc B!!%|c  Gz?'V-?c.Q?BCN1@CeCq "!%Cffffff9@ Feb  rq1ʡE?!" Mar  rq1(\µ?!" Apr  rq1ˡE?!" May  rq1(\µ?!" June  rq1ˡE?!" July    rq1 (\µ? !  " !Aug! ! rq1!(\µ?!!!!"" X# BJ$ % & ' K( ) * + S, - . / 0 @1 2 @3 @4 5 6 7 8 L9 : < D= > ? @ @ A  "Sept" " rq1"ˡE?"!""" #Oct# # rq1#(\µ?#!##" $Nov$ $ rq1$ˡE?$!$$" %Dec% % rq1%(\µ?%!%%"&&" '#Total '$- '$- '$- '$-!'##E!'%#1*)Monthly Fraction of Annual Daylight Hours***+Latitude +60 N +50 N +40 N +30 N +20 N +10 N~ + +10 S + 20 S + 30 S + 40 S -Jan-Mb?~ -@-x&?-㥛 ?-ʡE?-#~j?~ -!@-bX9ȶ?- Zd;O?- EԸ?- &1?-  .Feb.v/?.T㥛 ?.L7A`?~ .@.㥛 ?~ .@.ʡE?.MbX9?. #~j?. sh|??. jt?.  /Mar/#~j?/ˡE?/ˡE?//$?//$?~ /!@~ /!@~ /!@/ jt?/ jt?/ ʡE?/  0Apr0~jt?0Zd;O?0bX9ȶ?0ʡE?~ 0!@0/$?0ˡE?0#~j?0 MbX9?0 ʡE?~ 0 @0  1May1ʡE?11Zd?1MbX?~ 1#@1Zd;O?1I +?~ 1!@1ˡE?1 MbX9?1 l?~ 1 @1  2June2X9v?2Cl?~ 2$@~ 2#@~ 2"@2jt?2ˡE?2MbX9?2 l?~ 2 @2 Mb?2  3July3rh|?~ 3&@3B`"۹?3EԸ?3+η?3bX9ȶ?~ 3!@3#~j?3 +?3 㥛 ?3  rh?3  4Aug41Zd?~ 4$@4Mb?4Zd;O?~ 4"@4ʡE?~ 4!@4sh|??~ 4  @4 +?4 l?4  5Sept5jt?~ 5!@5sh|??5sh|??5sh|??5ˡE?5ˡE?5ˡE?5 #~j?5 #~j?~ 5  @5  6Oct~ 6@~ 6@6ʡE?~ 6 @6ˡE?6sh|??~ 6!@6jt?6 I +?~ 6 "@6 Zd;O?6  7Nov~ 7@7Zd;?7x&?7;On?7~jt?7MbX9?7ˡE?~ 7!@7 bX9ȶ?7 Zd;O?7 EԸ?7  8Dec8/$?8y&1?~ 8@8;On?8ʡE?8#~j?~ 8!@8I +?8 +η?8 MbX?~ 8 %@8 : Differences:50-60 N:40-50 N:30-40 N: 20-30 N :10-20 N:0-10 N:0-10 S:10-20 S: 20-30 S: 30-40 S <Jan<8v?<!!<GC C <&1|?<!!<GC C <~jtx?<!!<GC C O<Mbp?<!!<GC C <Mbp?<!!<GCC <Mbp?<!!<GC+C -<Mbp<!!<GC wC<jth<!!<GC C< Gzt< !!<G CC< pGzt< !!<G C`C =Feb=~jtx?<=jth?<=Mbp?<=~jth?<=Mb`?<=Mb`?<=Mb`<=Mb`<= Mb`< = ~jth<  >Mar>MbP?<><>Mb`?<><>MbP?<><><>MbP<> < > MbP<  ?Apr?Mbp<?jth<?Mb`<?Mb`<?MbP<?Mb`<?MbP?<?Mb`?<? Mb`?< ? Mb`?<  @May@Gz<@Mb<@Mbp<@jth<@Mbp<@~jth<@jth?<@jth?<@ Gzt?< @ Mbp?<  AJuneAQ<A8On<AGzt<AGzt<AMbp<AMbp<Ajth?<AGzt?<A Mbp?< A jtx?< B dC JBD E F G K BJulyB8v<B8On<BMbp<BMbp<BMbp<BMbp<BMbp?<Bjth?<B Gzt?< B pGzt?<  CAugCp&1|<Cjtx<CMb`<CMb`<Cjth<CMb`<CMb`?<Cjth?<C Mb`?< C Mbp?<  DSeptDMbP<DMb`<D<D<DMbP<D<D<DMbP?<D < D MbP?<  EOctEpGzt?<EMb`?<Ejth?<EMb`?<EMbP?<EMb`?<EMbP<EMb`<E Mb`< E Mb`<  FNovFI +?<Fjtx?<FpGzt?<FMbp?<Fjth?<Fjth?<Fjth<FMbp<F jth< F Gzt<  GDecGx&1?<G~jt?<Gjth<GGzt?<GMbp?<GMbp?<G~jth<GGzt<G jtx< G ~jtx< ]& /EHH(RZ[\]^_`aTemplate for calculation of monthly Potential Evapotranspiration (PET) using Blaney-Criddle equation 1994 by Andre K. Lehre, Dept. of Geology, Humboldt State University This template may be freely distributed. The author assumes no responsibility for errors in the template or its use. Instructions: 1) Enter latitude in decimal degrees; limits are 60 N and 40S 2) If latitude is 0 [equator] leave hemisphere space blank, otherwise enter N or S. 3) Enter mean monthly air temperatures in F or C. F will be automatically converted to C. 4) From Blaney-Criddle tables enter appropriate monthly values of crop factor, k 5) After entering all data press command-= to calculate| + fR # G 0 ! (= <%,> "