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365 lines
11 KiB
Plaintext
365 lines
11 KiB
Plaintext
5 years ago
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SUBROUTINE HEATEX(TOFDAY,DAYOFY,DELT,TSOLHR)
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C
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C HEATEX COMPUTES THE NET AMOUNT OF HEAT
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C RADIATION FLUX BEING TRANSFERRED ACROSS
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C THE AIR-WATER INTERFACE BASED ON AN
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C ENERGY BUDGET WHICH CONSIDERS SOLAR
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C RADIATION, ATMOSPHERIC RADIATION, BACK
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C RADIATION, CONDUCTION, AND EVAPORATION.
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C SAVE
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INTEGER ITIME,INWDAY,METRIC
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REAL CON1,CON2,CON3,CON4,CON5,CON6,DELTSL
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REAL SOLCON,TSOLHR,HA,CS,SOLAR,ALPHT
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REAL ELEVAT,LAT,LONG
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REAL DELTH,DELT,TOFDAY,DAYOFY,TLEFT
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REAL DECLIN,REARTH,EQTIME,DECLON
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REAL PI,STR,STB,STE,STS,ST1,ST2
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COMMON/INPUTS/LAT,LONG,ELEVAT,STANM
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COMMON/MET/WETBLB,ATMPR,DRYBLB,CLOUD,DAT
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C For metric units, radiation is in kJ/m2*hr
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METRIC=1
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LOUT=6
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CC
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CCC
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CCC NCASI Commentary, HEATEX Section A. (QUAL2 Step 1-0)
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CCC A. Compute and/or define required constants.
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CCC
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C
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CCC NCASI Commentary, HEATEX Section F.
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CCC F. Test for beginning of a new day.
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CCC
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CJFD cheap fix to prevent incrementing time for each material type ...
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CJFD jump passed time calcs, this only works because local values are saved
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C
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C DATA ITIME/0/
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C
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CIPK MAY94 CHANGED ORDER
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C
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ITIME=0
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IF(ITIME .EQ. 0) THEN
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PI=4.0*atan(1.)
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c PI=3.141628
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CON1=2.0*PI/365.0
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CON2=PI/180.0*LAT
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CON3=180.0/PI
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CON4=23.45*PI/180.0
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CON5=PI/12.0
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CON6=12.0/PI
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DELTSL=(LONG-STANM)/15.0
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CIPK MAR94
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IF(METRIC .EQ. 0) THEN
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SOLCON=438.0
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ELEXP=EXP(-ELEVAT/2532.0)
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ELSE
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SOLCON=4974.4
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c SOLCON=4870.8 !Original value incorrect DRC
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c ELEXP=EXP(-ELEV*3.2808/2532.0)
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ELEXP=EXP(-ELEVAT/771.76)
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ENDIF
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CIPK MAR94 END CHANGES
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ENDIF
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TLEFT=0.
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TSOLHR=0.
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55 CONTINUE
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ITIME=ITIME+1
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IF(ITIME .EQ. 1) THEN
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INWDAY=1
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ELSE
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INWDAY=0
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ENDIF
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C INWDAY =1 signals a new day or start of simulation
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C
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C Get Delta Time in hours
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C
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DELTH = DELT/3600.0
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TOFDAY = TOFDAY+DELTH
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C
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IF(DELTH .EQ. 0.) THEN
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DELTH=1.0
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TOFDAY=0.00
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TLEFT=24.
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ENDIF
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C
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C write(*,*) TOFDAY, dayofy
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c WRITE(IOT,*) 'TOFDAY DAYOFY',TOFDAY,DAYOFY
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56 CONTINUE
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IF(DELT .EQ. 0.) THEN
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TLEFT=TLEFT-DELTH*1.0001
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TOFDAY=TOFDAY+DELTH
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GO TO 85
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ENDIF
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IF(TLEFT .GT. 0.0) THEN
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TOFDAY=TLEFT
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DAYOFY=DAYOFY + 1.0
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INWDAY=1
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IF (TOFDAY .GT. 24.001) THEN
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TLEFT=TOFDAY-24.00
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TOFDAY=24.00
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DELTH=24.00
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ELSE
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DELTH=TLEFT
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TLEFT=0.0
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ENDIF
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GO TO 85
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ENDIF
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IF (TOFDAY .GT. 24.001) THEN
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TLEFT=TOFDAY-24.00
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TOFDAY=24.00
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DELTH=DELTH-TLEFT
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INWDAY=0
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ENDIF
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85 CONTINUE
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CDRC write(LOUT,*)'at 85 tleft,tofday,delth,inwday',tleft,tofday,delth
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CDRC + ,inwday
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cDRC CALL GETMET(TOFDAY)
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IF(INWDAY .EQ. 1) THEN
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CCC
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CCC NCASI Commentary, HEATEX Section B. (QUAL2 Step 2-0)
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CCC B. Begin computations for calculating the
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CCC net solar radiation term.
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CCC
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CCC B.1 Test for beginning of a new day.
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CCC
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CCC
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CCC B.1a Calculate seasonal and daily position
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CCC of the sun relative to the location
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CCC of the basin on the earth's
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CCC surface. (QUAL2 Step 2-1)
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CCC
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REARTH=1.0+0.017*COS(CON1*(186.0-DAYOFY))
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DECLIN=CON4*COS(CON1*(172.0-DAYOFY))
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RR=REARTH**2
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EQTIME=0.000121-0.12319*SIN(CON1*(DAYOFY-1.0)-0.07014)
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* -0.16549*SIN(2.0*CON1*(DAYOFY-1.0)+0.3088)
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DECLON=ABS(DECLIN)
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CC
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CC Replace TAN function with SIN/COS.
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CC
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TANA = SIN(CON2)/COS(CON2)
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TANB = SIN(DECLON)/COS(DECLON)
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ACS = TANA*TANB
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CC
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IF (ACS .NE. 0.0) THEN
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XX=SQRT(1.0-ACS*ACS)
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XX=XX/ACS
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cipk oct94 ACS=ATAN(XX)
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if(xx .gt. 0.) then
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ACS=abs(ATAN(XX))
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IF (DECLIN.GT.0.0) ACS=PI-ACS
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else
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acs=abs(atan(xx))
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if (declin.lt.0.0) acs=pi-acs
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endif
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ELSE
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ACS=PI/2.0
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ENDIF
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CCC
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CCC B.1a Calculate the standard time of
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CCC sunrise (STR) and sunset (STS).
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CCC (QUAL2 Step 2-2)
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CCC
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C
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STR=12.0-CON6*ACS+DELTSL
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STS=24.0-STR+2.0*DELTSL
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DAYLEN=STS-STR
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STB=TOFDAY-DELTH
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STE=STB+DELTH
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cDRC WRITE(LOUT,*) 'AFTER 2-2 STR,STS,STB,STE',STR,STS,STB,STE
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CCC
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CCC B.2 Increment the variables that define the
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CCC time of the beginning(STB) and the
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CCC end (STE) of the time interval.
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CCC
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ELSE
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STB=STB+DELTH
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STE=STB+DELTH
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ENDIF
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CCC
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CCC B.3 Test if time to read in local
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CCC climatological data. (QUAL2 Step 2-3)
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CCC
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CJFD IF (TRLCD.NE.1.0) GO TO 82
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CCC
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CCC B.7 Compute vapor pressures (VPWB and
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CCC VPAIR), dew point (DEWPT), AND
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CCC dampening effect of clouds (CNS
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CCC and CNL). (QUAL2 Step 2-4)
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CCC
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CIPK MAR94
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IF(METRIC .EQ. 0) THEN
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VPWB=0.1001*EXP(0.03*WETBLB)-0.0837
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VPAIR=VPWB-0.000367*ATMPR*(DRYBLB-WETBLB)
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* *(1.0+(WETBLB-32.0)/1571.0)
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DEWPT=ALOG((VPAIR+0.0837)/0.1001)/0.03
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ELSE
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c VPWB=(0.1001*EXP(0.03*(WETBLB(NN)*1.8+32.))-0.0837)/29.53*1000.
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c VPAIR=VPWB-0.000367*ATMPR(NN)*(DRYBLB(NN)-WETBLB(NN))*1.8
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c * *(1.0+(WETBLB(NN)*1.8)/1571.0)
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c DEWPT=((ALOG((VPAIR/1000.*29.53+0.0837)/0.1001)/0.03)-32.0)/1.8
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c IF(NN .EQ. 1) WRITE(75,*) 'VPWB',VPWB,VPAIR,DEWPT
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vpwb=8.8534*exp(0.054*wetblb)-2.8345
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VPAIR=VPWB-0.0006606*ATMPR*(DRYBLB-WETBLB)
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* *(1.0+WETBLB/872.78)
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c vpwb in millibars
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c vpair in millibars
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DEWPT=ALOG((VPAIR+2.8345)/8.8534)/0.054
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c dewpt in deg C
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c IF(NN .EQ. 1) WRITE(75,*) 'VPWB',VPWB,VPAIR,DEWPT
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ENDIF
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CIPK MAR94 END CHANGES
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CS=1.0-0.65*CLOUD**2
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IF (CLOUD.GT.0.9) CS=0.50
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CNL=CLOUD*10.0+1.0
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NL=CNL
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82 CONTINUE
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IF (STS.LE.STB.OR.STR.GE.STE) GO TO 35
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C IF(STR.GT.STB.AND.STR.LT.STE) GO TO 41
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C IF (STS.LT.STE.AND.STS.GT.STB) GO TO 42
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ST1=STB
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ST2=STE
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IF(STB .LT. STR) ST1=STR
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IF(STE .GT. STS) ST2=STS
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CCC
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CCC NCASI Commentary, HEATEX Section C. (QUAL2 Step 2-5)
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CCC C. Continue with calculations for solar
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CCC radiation.
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CCC
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CCC C.1 Calculate hour angles (TB and TE).
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CCC
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C TB=STB-12.0-DELTSL+EQTIME
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C TE=STE-12.0-DELTSL+EQTIME
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C WRITE(LOUT,*) '40 ,DELTSL,EQTIME,STB,STE,TB,TE',
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C +DELTSL,EQTIME,STB,STE,TB,TE
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C GO TO 43
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C 41 TB=STR-12.0-DELTSL+EQTIME
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C TE=STE-12.0-DELTSL+EQTIME
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C WRITE(LOUT,*) '41 ,DELTSL,EQTIME,STR,STE,TB,TE',
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C +DELTSL,EQTIME,STR,STE,TB,TE
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C GO TO 43
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C 42 TB=STB-12.0-DELTSL+EQTIME
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C TE=STS-12.0-DELTSL+EQTIME
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C WRITE(LOUT,*) '42 ,DELTSL,EQTIME,STB,STS,TB,TE',
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C +DELTSL,EQTIME,STB,STR,TB,TE
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C 43 CONTINUE
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TB=ST1-12.0-DELTSL+EQTIME
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TE=ST2-12.0-DELTSL+EQTIME
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CDRC WRITE(LOUT,*) '43 ,DELTSL,EQTIME,ST1,ST1,TB,TE',
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CDRC +DELTSL,EQTIME,ST1,ST2,TB,TE
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TALT=(TB+TE)/2.0
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CDRC WRITE(LOUT,*) 'TB,TE',TB,TE
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CCC
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CCC C.2 Compute amount of clear sky, solar
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CCC radiation(SOLAR), and altitude of
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CCC the sun (ALPHT). (QUAL2 Step 2-6)
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CCC
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SOLAR=SOLCON/RR*(SIN(CON2)*SIN(DECLIN)*(TE-TB)+CON6*COS(CON2)*
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* COS(DECLIN)*(SIN(CON5*TE)-SIN(CON5*TB)))
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ALPHT=SIN(CON2)*SIN(DECLIN)+COS(CON2)*COS(DECLIN)*COS(CON5*TALT)
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IF (ABS(ALPHT).EQ.1.0) GO TO 4
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Y=SQRT(1.0-ALPHT*ALPHT)
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Y=ALPHT/Y
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ALPHT=ATAN(Y)
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GO TO 5
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4 IF (ALPHT.EQ.-1.0) GO TO 6
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ALPHT=PI/2.0
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GO TO 5
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6 ALPHT=-PI/2.0
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5 CONTINUE
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CDRC write(LOUT,*) 'alpht',alpht
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IF (ALPHT.LT.0.01) GO TO 35
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CCC
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CCC C.3 Compute absorption and scattering due
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CCC to atmospheric conditions. (QUAL2
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CCC Step 2-7)
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CCC
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CIPK MAR94
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IF(METRIC .EQ. 0) THEN
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PWC=0.00614*EXP(0.0489*DEWPT)
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ELSE
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c PWC=0.00614*EXP(0.0489*(DEWPT*1.8+32.0))
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c IF(NN.EQ. 1) WRITE(75,*) 'PWC',PWC
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PWC=0.02936*EXP(0.08802*DEWPT)
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c IF(NN.EQ. 1) WRITE(75,*) 'PWC',PWC
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ENDIF
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CIPK MAR94 END CHANGES
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OAM=ELEXP/(SIN(ALPHT)+0.15*(ALPHT*CON3+3.885)**(-1.253))
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A1=EXP(-(0.465+0.0408*PWC)*(0.129+0.171*EXP(-0.880*OAM))*OAM)
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A2=EXP(-(0.465+0.0408*PWC)*(0.179+0.421*EXP(-0.721*OAM))*OAM)
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CCC
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CCC C.4 Compute reflectivity coefficient (RS).
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CCC (QUAL2 Step 2-8)
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CCC
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GO TO (30,31,31,31,31,31,32,32,32,32,33), NL
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30 AR=1.18
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BR=-0.77
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GO TO 34
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31 AR=2.20
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BR=-0.97
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GO TO 34
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32 AR=0.95
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BR=-0.75
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GO TO 34
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33 AR=0.35
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BR=-0.45
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34 CONTINUE
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RS=AR*(CON3*ALPHT)**BR
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CDRC write(LOUT,*) 'rs',rs
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CC
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CC Add test for RS greater than 1.0.
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CC
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IF(RS.GE.1.0) GO TO 35
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CC
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CCC
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CCC C.5 Compute atmospheric transmission term (ATC).
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CCC
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ATC=(A2+0.5*(1.0-A1-DAT))/(1.0-0.5*RS*(1.0-A1+DAT))
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CCC
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CCC C.6 Compute net solar radiaiont for the time
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CCC interval delta t. (QUAL2 Step 2-9)
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CCC
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CDRC write(LOUT,*) 'solar,atc,cs',solar,atc,cs
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TSOLHR = TSOLHR+SOLAR*ATC*CS*(1.0-RS)
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GO TO 36
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35 TSOLHR = TSOLHR+0.0
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36 CONTINUE
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CLC=1.0+0.17*CLOUD**2
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CCC
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CCC NCASI Commentary, HEATEX Section D. (QUAL2 Step 3-0)
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CCC D. Compute heat fluxes from other terms.
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CCC
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CCC D.1 Long wave atmospheric radiation (HA).
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CCC
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CIPK MAR94
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IF(METRIC .EQ. 0) THEN
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HA = HA+
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+ 0.97*1.73E-09*2.89E-06*(DRYBLB+460.0)**6*CLC*DELTH
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ELSE
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c
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c HA(NN) = HA(NN) +
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c + 0.97*1.73E-09*2.89E-06*(DRYBLB(NN)*1.8+32.+460.0)**6
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c + *CLC*DELTH*4870.8/438.
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c IF(NN.EQ. 1) WRITE(75,*) 'HA',HA(NN)
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HA = HA +
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+ 0.97*9.37e-06*2.0412E-07*(DRYBLB+273.0)**6
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+ *CLC*DELTH
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c IF(NN.EQ. 1) WRITE(75,*) 'HA',HA
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ENDIF
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CIPK MAR94 END CHANGES
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C WRITE(LOUT,*) 'tofday,tsolhr,ha',
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C + TOFDAY, TSOLHR, HA, STB, STE, STR, STS
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IF(TLEFT .GT. 0.) GO TO 56
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CJFD cheap fix to prevent incrementing time for each material type ...
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CC
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DELTH = DELT/3600.
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RETURN
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END
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