38 delta_ts, glac_index, z_sl, dzsl_dtau, z_mar)
50 real(dp),
intent(in) :: time, dtime, dxi, deta
52 real(dp),
intent(out) :: delta_ts, glac_index, dzsl_dtau, z_mar
53 real(dp),
intent(inout) :: z_sl
60 integer(i4b) :: i, j, n
61 integer(i4b) :: i_gr, i_kl
62 integer(i4b) :: nrec_temp_precip
63 integer(i4b),
save :: nrec_temp_precip_save = -1
65 real(dp) :: z_sl_min, t1, t2, t3, t4, t5, t6
66 real(dp) :: time_gr, time_kl
67 real(dp) :: z_sle_present, z_sle_help
68 real(dp),
dimension(0:JMAX,0:IMAX,0:12) :: precip
69 real(dp),
dimension(0:JMAX,0:IMAX) :: &
70 snowfall, rainfall, melt, melt_star
71 real(dp),
dimension(0:JMAX,0:IMAX,12) :: temp_mm
72 real(dp),
dimension(0:JMAX,0:IMAX) :: temp_ma, temp_ampl
73 real(dp),
dimension(0:JMAX,0:IMAX) :: temp_ma_anom, temp_mj_anom, precip_ma_anom
74 real(dp),
dimension(0:IMAX,0:JMAX),
save :: temp_ma_anom_tra, temp_mj_anom_tra, &
79 real(dp),
dimension(12) :: temp_mm_help
80 real(dp) :: temp_jja_help
81 real(dp),
dimension(0:JMAX,0:IMAX) :: et
82 real(dp) :: theta_ma, c_ma, kappa_ma, gamma_ma, &
83 theta_mj, c_mj, kappa_mj, gamma_mj
84 real(dp) :: sine_factor
85 real(dp) :: gamma_p, zs_thresh, &
86 temp_rain, temp_snow, &
87 inv_delta_temp_rain_snow, coeff(0:5), inv_sqrt2_s_stat, &
88 precip_fact, frac_solid
90 phi_sep, temp_lt, temp_ht, inv_delta_temp_ht_lt, &
91 beta1_lt, beta1_ht, beta2_lt, beta2_ht, &
92 beta1, beta2, pmax, mu, lambda_lti, temp_lti
93 real(dp),
dimension(256) :: pdd_mod_lat, delta_pdd_mod_lat_inv, &
94 pdd_mod_fac_w, pdd_mod_fac_e, pdd_mod_fac
95 real(dp) :: lon_w_e_sep, pdd_mod_fac_interpol
96 logical,
dimension(0:JMAX,0:IMAX) :: check_point
101 integer(i4b) :: nc3cor(3)
103 integer(i4b) :: nc3cnt(3)
107 real(dp),
parameter :: &
108 inv_twelve = 1.0_dp/12.0_dp, one_third = 1.0_dp/3.0_dp
110 character(len=64),
parameter :: thisroutine =
'boundary'
129 delta_ts = sine_amplit &
130 *cos(2.0_dp*pi*time/(sine_period*year_sec)) &
137 if (time/year_sec <
real(grip_time_min,dp)) then
138 delta_ts = griptemp(0)
139 else if (time/year_sec <
real(grip_time_max,dp)) then
141 i_kl = floor(((time/year_sec) &
142 -
real(grip_time_min,dp))/
real(grip_time_stp,dp))
145 i_gr = ceiling(((time/year_sec) &
146 -
real(grip_time_min,dp))/
real(grip_time_stp,dp))
147 i_gr = min(i_gr, ndata_grip)
149 if (i_kl == i_gr)
then
151 delta_ts = griptemp(i_kl)
155 time_kl = (grip_time_min + i_kl*grip_time_stp) *year_sec
156 time_gr = (grip_time_min + i_gr*grip_time_stp) *year_sec
158 delta_ts = griptemp(i_kl) &
159 +(griptemp(i_gr)-griptemp(i_kl)) &
160 *(time-time_kl)/(time_gr-time_kl)
166 delta_ts = griptemp(ndata_grip)
169 delta_ts = delta_ts * grip_temp_fact
176 if (time/year_sec <
real(gi_time_min,dp)) then
177 glac_index = glacial_index(0)
178 else if (time/year_sec <
real(gi_time_max,dp)) then
180 i_kl = floor(((time/year_sec) &
181 -
real(gi_time_min,dp))/
real(gi_time_stp,dp))
184 i_gr = ceiling(((time/year_sec) &
185 -
real(gi_time_min,dp))/
real(gi_time_stp,dp))
186 i_gr = min(i_gr, ndata_gi)
188 if (i_kl == i_gr)
then
190 glac_index = glacial_index(i_kl)
194 time_kl = (gi_time_min + i_kl*gi_time_stp) *year_sec
195 time_gr = (gi_time_min + i_gr*gi_time_stp) *year_sec
197 glac_index = glacial_index(i_kl) &
198 +(glacial_index(i_gr)-glacial_index(i_kl)) &
199 *(time-time_kl)/(time_gr-time_kl)
205 glac_index = glacial_index(ndata_gi)
211 #elif ( (TSURFACE==6) && (ACCSURFACE==6) )
213 if (time/year_sec <= temp_precip_time_min)
then
215 else if (time/year_sec < temp_precip_time_max)
then
216 nrec_temp_precip = nint( ((time/year_sec)-temp_precip_time_min) &
217 / temp_precip_time_stp )
219 nrec_temp_precip = ndata_temp_precip
222 if ( nrec_temp_precip < 0 )
then
223 stop
' boundary: nrec_temp_precip < 0, not allowed!'
224 else if ( nrec_temp_precip > ndata_temp_precip )
then
225 stop
' boundary: nrec_temp_precip > ndata_temp_precip, not allowed!'
228 if ( nrec_temp_precip /= nrec_temp_precip_save )
then
232 nc3cor(3) = nrec_temp_precip + 1
237 call
check( nf90_inq_varid(ncid_temp_precip,
'annualtemp_anom', ncv), &
239 call
check( nf90_get_var(ncid_temp_precip, ncv, temp_ma_anom_tra, &
240 start=nc3cor, count=nc3cnt), thisroutine )
242 call
check( nf90_inq_varid(ncid_temp_precip,
'julytemp_anom', ncv), &
244 call
check( nf90_get_var(ncid_temp_precip, ncv, temp_mj_anom_tra, &
245 start=nc3cor, count=nc3cnt), thisroutine )
247 call
check( nf90_inq_varid(ncid_temp_precip,
'precipitation_anom', ncv), &
249 call
check( nf90_get_var(ncid_temp_precip, ncv, precip_ma_anom_tra, &
250 start=nc3cor, count=nc3cnt), thisroutine )
254 temp_ma_anom = transpose(temp_ma_anom_tra)
255 temp_mj_anom = transpose(temp_mj_anom_tra)
256 precip_ma_anom = transpose(precip_ma_anom_tra) *(1.0e-03_dp/year_sec)*(rho_w/rho)
259 nrec_temp_precip_save = nrec_temp_precip
274 t1 = -250000.0_dp *year_sec
275 t2 = -140000.0_dp *year_sec
276 t3 = -125000.0_dp *year_sec
277 t4 = -21000.0_dp *year_sec
278 t5 = -8000.0_dp *year_sec
279 t6 = 0.0_dp *year_sec
283 else if (time < t2)
then
284 z_sl = z_sl_min*(time-t1)/(t2-t1)
285 else if (time < t3)
then
286 z_sl = -z_sl_min*(time-t3)/(t3-t2)
287 else if (time < t4)
then
288 z_sl = z_sl_min*(time-t3)/(t4-t3)
289 else if (time < t5)
then
290 z_sl = -z_sl_min*(time-t5)/(t5-t4)
291 else if (time < t6)
then
301 if (time/year_sec <
real(specmap_time_min,dp)) then
302 z_sl = specmap_zsl(0)
303 else if (time/year_sec <
real(specmap_time_max,dp)) then
305 i_kl = floor(((time/year_sec) &
306 -
real(specmap_time_min,dp))/
real(specmap_time_stp,dp))
309 i_gr = ceiling(((time/year_sec) &
310 -
real(specmap_time_min,dp))/
real(specmap_time_stp,dp))
311 i_gr = min(i_gr, ndata_specmap)
313 if (i_kl == i_gr)
then
315 z_sl = specmap_zsl(i_kl)
319 time_kl = (specmap_time_min + i_kl*specmap_time_stp) *year_sec
320 time_gr = (specmap_time_min + i_gr*specmap_time_stp) *year_sec
322 z_sl = specmap_zsl(i_kl) &
323 +(specmap_zsl(i_gr)-specmap_zsl(i_kl)) &
324 *(time-time_kl)/(time_gr-time_kl)
330 z_sl = specmap_zsl(ndata_specmap)
337 if ( z_sl_old > -999999.9_dp )
then
338 dzsl_dtau = (z_sl-z_sl_old)/dtime
347 #if ( MARINE_ICE_CALVING==2 || MARINE_ICE_CALVING==3 )
349 #elif ( MARINE_ICE_CALVING==4 || MARINE_ICE_CALVING==5 )
350 z_mar = fact_z_mar*z_sl
351 #elif ( MARINE_ICE_CALVING==6 || MARINE_ICE_CALVING==7 )
352 if (z_sl >= -80.0_dp)
then
355 z_mar = 10.25_dp*(z_sl+80.0_dp)-200.0_dp
357 z_mar = fact_z_mar*z_mar
369 check_point(j,i) = .false.
375 if (maske(j,i) >= 2)
then
376 check_point(j ,i ) = .true.
377 check_point(j ,i+1) = .true.
378 check_point(j ,i-1) = .true.
379 check_point(j+1,i ) = .true.
380 check_point(j-1,i ) = .true.
387 if (check_point(j,i))
then
397 if (check_point(j,i))
then
398 maske(j,i) = maske_neu(j,i)
405 #if TEMP_PRESENT_PARA == 1 /* Parameterization by Ritz et al. (1997) */
408 gamma_ma = -7.992e-03_dp
413 gamma_mj = -6.277e-03_dp
417 #elif TEMP_PRESENT_PARA == 2 /* Parameterization by Fausto et al. (2009) */
420 gamma_ma = -6.309e-03_dp
422 kappa_ma = -0.0672_dp
425 gamma_mj = -5.426e-03_dp
427 kappa_mj = -0.0518_dp
431 stop
' boundary: Parameter TEMP_PRESENT_PARA must be either 1 or 2!'
440 temp_ma_present(j,i) = theta_ma &
442 + c_ma*phi(j,i)*pi_180_inv &
443 + kappa_ma*(modulo(lambda(j,i)+pi,2.0_dp*pi)-pi)*pi_180_inv
448 temp_mj_present(j,i) = theta_mj &
450 + c_mj*phi(j,i)*pi_180_inv &
451 + kappa_mj*(modulo(lambda(j,i)+pi,2.0_dp*pi)-pi)*pi_180_inv
458 temp_ma(j,i) = temp_ma_present(j,i) + delta_ts
459 temp_mm(j,i,7) = temp_mj_present(j,i) + delta_ts
461 #elif (TSURFACE == 5)
465 temp_ma(j,i) = temp_ma_present(j,i) + glac_index*temp_ma_lgm_anom(j,i)
466 temp_mm(j,i,7) = temp_mj_present(j,i) + glac_index*temp_mj_lgm_anom(j,i)
468 #elif (TSURFACE == 6)
473 temp_ma(j,i) = temp_ma_present(j,i) + temp_ma_anom_fact*temp_ma_anom(j,i)
474 temp_mm(j,i,7) = temp_mj_present(j,i) + temp_mj_anom_fact*temp_mj_anom(j,i)
480 temp_ampl(j,i) = temp_mm(j,i,7) - temp_ma(j,i)
482 if (temp_ampl(j,i) < eps)
then
493 sine_factor = sin((
real(n,dp)-4.0_dp)*pi/6.0_dp)
497 temp_mm(j,i,n) = temp_ma(j,i) + sine_factor*temp_ampl(j,i)
505 #if (ELEV_DESERT == 1)
507 gamma_p = gamma_p*1.0e-03_dp
509 zs_thresh = zs_thresh
513 #if (SOLID_PRECIP == 1) /* Marsiat (1994) */
520 inv_delta_temp_rain_snow = 1.0_dp/(temp_rain-temp_snow)
522 #elif (SOLID_PRECIP == 2) /* Bales et al. (2009) */
529 coeff(0) = 5.4714e-01_dp
530 coeff(1) = -9.1603e-02_dp
531 coeff(2) = -3.314e-03_dp
532 coeff(3) = 4.66e-04_dp
533 coeff(4) = 3.8e-05_dp
534 coeff(5) = 6.0e-07_dp
536 #elif (SOLID_PRECIP == 3) /* Huybrechts and de Wolde (1999) */
540 temp_snow = temp_rain
546 inv_sqrt2_s_stat = 1.0_dp/(sqrt(2.0_dp)*s_stat)
550 #if (ABLSURFACE==1 || ABLSURFACE==2)
554 phi_sep = phi_sep_0*pi_180
559 inv_delta_temp_ht_lt = 1.0_dp/(temp_ht-temp_lt)
561 beta1_lt = beta1_lt_0 *(0.001_dp/86400.0_dp)*(rho_w/rho)
563 beta1_ht = beta1_ht_0 *(0.001_dp/86400.0_dp)*(rho_w/rho)
565 beta2_lt = beta2_lt_0 *(0.001_dp/86400.0_dp)*(rho_w/rho)
567 beta2_ht = beta2_ht_0 *(0.001_dp/86400.0_dp)*(rho_w/rho)
570 mu = mu_0 *(1000.0_dp*86400.0_dp)*(rho/rho_w)
572 #if (PDD_MODIFIER==2)
574 lon_w_e_sep = lon_w_e_sep *pi_180
576 if (lon_w_e_sep < 0.0_dp)
then
577 lon_w_e_sep = lon_w_e_sep + 2.0_dp*pi
578 else if (lon_w_e_sep >= (2.0_dp*pi))
then
579 lon_w_e_sep = lon_w_e_sep - 2.0_dp*pi
583 pdd_mod_fac_w = 0.0_dp
584 pdd_mod_fac_e = 0.0_dp
586 pdd_mod_lat( 1) = pdd_mod_lat_01 *pi_180
587 pdd_mod_fac_w( 1) = pdd_mod_fac_w_01
588 pdd_mod_fac_e( 1) = pdd_mod_fac_e_01
589 pdd_mod_lat( 2) = pdd_mod_lat_02 *pi_180
590 pdd_mod_fac_w( 2) = pdd_mod_fac_w_02
591 pdd_mod_fac_e( 2) = pdd_mod_fac_e_02
592 pdd_mod_lat( 3) = pdd_mod_lat_03 *pi_180
593 pdd_mod_fac_w( 3) = pdd_mod_fac_w_03
594 pdd_mod_fac_e( 3) = pdd_mod_fac_e_03
595 pdd_mod_lat( 4) = pdd_mod_lat_04 *pi_180
596 pdd_mod_fac_w( 4) = pdd_mod_fac_w_04
597 pdd_mod_fac_e( 4) = pdd_mod_fac_e_04
598 pdd_mod_lat( 5) = pdd_mod_lat_05 *pi_180
599 pdd_mod_fac_w( 5) = pdd_mod_fac_w_05
600 pdd_mod_fac_e( 5) = pdd_mod_fac_e_05
601 pdd_mod_lat( 6) = pdd_mod_lat_06 *pi_180
602 pdd_mod_fac_w( 6) = pdd_mod_fac_w_06
603 pdd_mod_fac_e( 6) = pdd_mod_fac_e_06
604 pdd_mod_lat( 7) = pdd_mod_lat_07 *pi_180
605 pdd_mod_fac_w( 7) = pdd_mod_fac_w_07
606 pdd_mod_fac_e( 7) = pdd_mod_fac_e_07
607 pdd_mod_lat( 8) = pdd_mod_lat_08 *pi_180
608 pdd_mod_fac_w( 8) = pdd_mod_fac_w_08
609 pdd_mod_fac_e( 8) = pdd_mod_fac_e_08
610 pdd_mod_lat( 9) = pdd_mod_lat_09 *pi_180
611 pdd_mod_fac_w( 9) = pdd_mod_fac_w_09
612 pdd_mod_fac_e( 9) = pdd_mod_fac_e_09
613 pdd_mod_lat( 10) = pdd_mod_lat_10 *pi_180
614 pdd_mod_fac_w(10) = pdd_mod_fac_w_10
615 pdd_mod_fac_e(10) = pdd_mod_fac_e_10
617 delta_pdd_mod_lat_inv = 0.0_dp
620 delta_pdd_mod_lat_inv(n) = 1.0_dp/(pdd_mod_lat(n+1)-pdd_mod_lat(n))
625 #elif (ABLSURFACE==3)
627 lambda_lti = lambda_lti *(0.001_dp/year_sec)*(rho_w/rho)
637 #if (ABLSURFACE==1 || ABLSURFACE==2)
639 if (phi(j,i) <= phi_sep)
then
646 if (temp_mm(j,i,7) >= temp_ht)
then
649 else if (temp_mm(j,i,7) <= temp_lt)
then
654 + (beta1_ht-beta1_lt) &
655 *inv_delta_temp_ht_lt*(temp_mm(j,i,7)-temp_lt)
657 + (beta2_lt-beta2_ht) &
658 *(inv_delta_temp_ht_lt*(temp_ht-temp_mm(j,i,7)))**3
663 #if (PDD_MODIFIER==2)
665 if ( lambda(j,i) <= lon_w_e_sep )
then
666 pdd_mod_fac = pdd_mod_fac_w
668 pdd_mod_fac = pdd_mod_fac_e
671 if (phi(j,i) <= pdd_mod_lat(1))
then
673 beta1 = beta1 * pdd_mod_fac(1)
674 beta2 = beta2 * pdd_mod_fac(1)
676 else if (phi(j,i) >= pdd_mod_lat(n_pdd_mod))
then
678 beta1 = beta1 * pdd_mod_fac(n_pdd_mod)
679 beta2 = beta2 * pdd_mod_fac(n_pdd_mod)
685 if ( (phi(j,i) >= pdd_mod_lat(n)) &
687 (phi(j,i) <= pdd_mod_lat(n+1)) )
then
689 pdd_mod_fac_interpol = pdd_mod_fac(n) &
690 + (pdd_mod_fac(n+1)-pdd_mod_fac(n)) &
691 *(phi(j,i)-pdd_mod_lat(n)) &
692 *delta_pdd_mod_lat_inv(n)
694 beta1 = beta1 * pdd_mod_fac_interpol
695 beta2 = beta2 * pdd_mod_fac_interpol
711 #if (ACCSURFACE <= 3)
715 #if (ELEV_DESERT == 0)
719 #elif (ELEV_DESERT == 1)
721 if (zs_ref(j,i) < zs_thresh)
then
723 = exp(gamma_p*(max(zs(j,i),zs_thresh)-zs_thresh))
726 = exp(gamma_p*(max(zs(j,i),zs_thresh)-zs_ref(j,i)))
730 stop
' boundary: Parameter ELEV_DESERT must be either 0 or 1!'
734 precip(j,i,n) = precip_present(j,i,n)*precip_fact
742 precip_fact = accfact
744 precip_fact = 1.0_dp + gamma_s*delta_ts
746 precip_fact = exp(gamma_s*delta_ts)
749 #if (ACCSURFACE <= 3)
751 precip(j,i,0) = 0.0_dp
754 precip(j,i,n) = precip(j,i,n)*precip_fact
755 precip(j,i,0) = precip(j,i,0) + precip(j,i,n)*inv_twelve
759 #elif (ACCSURFACE == 5)
761 precip(j,i,0) = 0.0_dp
765 #if (PRECIP_ANOM_INTERPOL==1)
766 precip_fact = 1.0_dp-glac_index+glac_index*precip_lgm_anom(j,i,n)
768 #elif (PRECIP_ANOM_INTERPOL==2)
769 precip_fact = exp(-glac_index*gamma_precip_lgm_anom(j,i,n))
773 precip(j,i,n) = precip_present(j,i,n)*precip_fact
774 precip(j,i,0) = precip(j,i,0) + precip(j,i,n)*inv_twelve
778 #elif (ACCSURFACE == 6)
782 precip(j,i,0) = precip_ma_present(j,i) + precip_anom_fact*precip_ma_anom(j,i)
786 precip(j,i,n) = precip(j,i,0)
794 accum(j,i) = precip(j,i,0)
796 snowfall(j,i) = 0.0_dp
800 #if (SOLID_PRECIP == 1) /* Marsiat (1994) */
802 if (temp_mm(j,i,n) >= temp_rain)
then
804 else if (temp_mm(j,i,n) <= temp_snow)
then
807 frac_solid = (temp_rain-temp_mm(j,i,n))*inv_delta_temp_rain_snow
810 #elif (SOLID_PRECIP == 2) /* Bales et al. (2009) */
812 if (temp_mm(j,i,n) >= temp_rain)
then
814 else if (temp_mm(j,i,n) <= temp_snow)
then
817 frac_solid = coeff(0) + temp_mm(j,i,n) * ( coeff(1) &
818 + temp_mm(j,i,n) * ( coeff(2) &
819 + temp_mm(j,i,n) * ( coeff(3) &
820 + temp_mm(j,i,n) * ( coeff(4) &
821 + temp_mm(j,i,n) * coeff(5) ) ) ) )
825 #elif (SOLID_PRECIP == 3) /* Huybrechts and de Wolde (1999) */
827 frac_solid = 1.0_dp &
828 - 0.5_dp*
erfcc((temp_rain-temp_mm(j,i,n))*inv_sqrt2_s_stat)
832 snowfall(j,i) = snowfall(j,i) + precip(j,i,n)*frac_solid*inv_twelve
836 rainfall(j,i) = precip(j,i,0) - snowfall(j,i)
838 if (snowfall(j,i) < 0.0_dp) snowfall(j,i) = 0.0_dp
839 if (rainfall(j,i) < 0.0_dp) rainfall(j,i) = 0.0_dp
845 #if (ABLSURFACE==1 || ABLSURFACE==2)
850 temp_mm_help(n) = temp_mm(j,i,n)
853 call
pdd(temp_mm_help, s_stat, et(j,i))
860 if ((beta1*et(j,i)) <= (pmax*snowfall(j,i)))
then
861 melt_star(j,i) = beta1*et(j,i)
863 runoff(j,i) = melt(j,i)+rainfall(j,i)
865 melt_star(j,i) = pmax*snowfall(j,i)
866 melt(j,i) = beta2*(et(j,i)-melt_star(j,i)/beta1)
867 runoff(j,i) = melt(j,i)+rainfall(j,i)
870 #elif (ABLSURFACE==2)
872 if ( rainfall(j,i) <= (pmax*snowfall(j,i)) )
then
874 if ( (rainfall(j,i)+beta1*et(j,i)) <= (pmax*snowfall(j,i)) )
then
875 melt_star(j,i) = rainfall(j,i)+beta1*et(j,i)
877 runoff(j,i) = melt(j,i)
879 melt_star(j,i) = pmax*snowfall(j,i)
881 *(et(j,i)-(melt_star(j,i)-rainfall(j,i))/beta1)
882 runoff(j,i) = melt(j,i)
887 melt_star(j,i) = pmax*snowfall(j,i)
888 melt(j,i) = beta2*et(j,i)
889 runoff(j,i) = melt(j,i) + rainfall(j,i)-pmax*snowfall(j,i)
895 #elif (ABLSURFACE==3)
897 temp_jja_help = one_third*(temp_mm(j,i,6)+temp_mm(j,i,7)+temp_mm(j,i,8))
899 melt_star(j,i) = 0.0_dp
900 melt(j,i) = lambda_lti*max((temp_jja_help-temp_lti), 0.0_dp)
901 runoff(j,i) = melt(j,i) + rainfall(j,i)
911 as_perp(j,i) = accum(j,i) - evap(j,i) - runoff(j,i)
917 if (melt_star(j,i) >= melt(j,i))
then
918 temp_s(j,i) = temp_ma(j,i) &
919 +mu*(melt_star(j,i)-melt(j,i))
921 temp_s(j,i) = temp_ma(j,i)
924 if (temp_s(j,i) > -0.001_dp) temp_s(j,i) = -0.001_dp
integer(i2b) function mask_update(z_sl, i, j)
Update of the topography mask due to changes of the sea level.
Declarations of kind types for SICOPOLIS.
subroutine pdd(temp_mm, s_stat, ET)
Computation of the positive degree days (PDD) with statistical temperature fluctuations; based on sem...
subroutine check(status, ch_calling_routine)
NetCDF error capturing.
real(dp) function erfcc(x)
Computation of the complementary error function erfc(x) = 1-erf(x) with a fractional error everywhere...
Declarations of global variables for SICOPOLIS (for the ANT domain).
subroutine boundary(time, dtime, dxi, deta, delta_ts, glac_index, z_sl, dzsl_dtau, z_mar)
Computation of the surface temperature (must be less than 0 deg C!) and of the accumulation-ablation ...
Declarations of global variables for SICOPOLIS.