38 delta_ts, glac_index, z_sl, dzsl_dtau, z_mar)
46 real(dp),
intent(in) :: time, dtime, dxi, deta
48 real(dp),
intent(out) :: delta_ts, glac_index, dzsl_dtau, z_mar
49 real(dp),
intent(inout) :: z_sl
56 integer(i4b) :: i, j, n
57 integer(i4b) :: i_gr, i_kl
59 real(dp) :: z_sl_min, t1, t2, t3, t4, t5, t6
60 real(dp) :: time_gr, time_kl
61 real(dp) :: z_sle_present, z_sle_help
62 real(dp),
dimension(0:JMAX,0:IMAX,0:12) :: precip
63 real(dp),
dimension(0:JMAX,0:IMAX) :: &
64 snowfall, rainfall, melt, melt_star
65 real(dp),
dimension(0:JMAX,0:IMAX,12) :: temp_mm
66 real(dp),
dimension(0:JMAX,0:IMAX) :: temp_ma
67 real(dp),
dimension(12) :: temp_mm_help
68 real(dp) :: temp_jja_help
69 real(dp),
dimension(0:JMAX,0:IMAX) :: et
70 real(dp) :: gamma_t, temp_diff
71 real(dp) :: gamma_p, zs_thresh, &
72 temp_rain, temp_snow, &
73 inv_delta_temp_rain_snow, coeff(0:5), inv_sqrt2_s_stat, &
74 precip_fact, frac_solid
75 real(dp) :: s_stat, beta1, beta2, pmax, mu, lambda_lti, temp_lti
76 logical,
dimension(0:JMAX,0:IMAX) :: check_point
78 real(dp),
parameter :: &
79 inv_twelve = 1.0_dp/12.0_dp, one_third = 1.0_dp/3.0_dp
98 delta_ts = sine_amplit &
99 *cos(2.0_dp*pi*time/(sine_period*year_sec)) &
106 if (time/year_sec.lt.
real(grip_time_min,dp)) then
107 delta_ts = griptemp(0)
108 else if (time/year_sec.lt.
real(grip_time_max,dp)) then
110 i_kl = floor(((time/year_sec) &
111 -
real(grip_time_min,dp))/
real(grip_time_stp,dp))
114 i_gr = ceiling(((time/year_sec) &
115 -
real(grip_time_min,dp))/
real(grip_time_stp,dp))
116 i_gr = min(i_gr, ndata_grip)
118 if (i_kl.eq.i_gr)
then
120 delta_ts = griptemp(i_kl)
124 time_kl = (grip_time_min + i_kl*grip_time_stp) *year_sec
125 time_gr = (grip_time_min + i_gr*grip_time_stp) *year_sec
127 delta_ts = griptemp(i_kl) &
128 +(griptemp(i_gr)-griptemp(i_kl)) &
129 *(time-time_kl)/(time_gr-time_kl)
135 delta_ts = griptemp(ndata_grip)
138 delta_ts = delta_ts * grip_temp_fact
145 if (time/year_sec <
real(gi_time_min,dp)) then
146 glac_index = glacial_index(0)
147 else if (time/year_sec <
real(gi_time_max,dp)) then
149 i_kl = floor(((time/year_sec) &
150 -
real(gi_time_min,dp))/
real(gi_time_stp,dp))
153 i_gr = ceiling(((time/year_sec) &
154 -
real(gi_time_min,dp))/
real(gi_time_stp,dp))
155 i_gr = min(i_gr, ndata_gi)
157 if (i_kl == i_gr)
then
159 glac_index = glacial_index(i_kl)
163 time_kl = (gi_time_min + i_kl*gi_time_stp) *year_sec
164 time_gr = (gi_time_min + i_gr*gi_time_stp) *year_sec
166 glac_index = glacial_index(i_kl) &
167 +(glacial_index(i_gr)-glacial_index(i_kl)) &
168 *(time-time_kl)/(time_gr-time_kl)
174 glac_index = glacial_index(ndata_gi)
190 t1 = -250000.0_dp *year_sec
191 t2 = -140000.0_dp *year_sec
192 t3 = -125000.0_dp *year_sec
193 t4 = -21000.0_dp *year_sec
194 t5 = -8000.0_dp *year_sec
195 t6 = 0.0_dp *year_sec
199 else if (time.lt.t2)
then
200 z_sl = z_sl_min*(time-t1)/(t2-t1)
201 else if (time.lt.t3)
then
202 z_sl = -z_sl_min*(time-t3)/(t3-t2)
203 else if (time.lt.t4)
then
204 z_sl = z_sl_min*(time-t3)/(t4-t3)
205 else if (time.lt.t5)
then
206 z_sl = -z_sl_min*(time-t5)/(t5-t4)
207 else if (time.lt.t6)
then
217 if (time/year_sec.lt.
real(specmap_time_min,dp)) then
218 z_sl = specmap_zsl(0)
219 else if (time/year_sec.lt.
real(specmap_time_max,dp)) then
221 i_kl = floor(((time/year_sec) &
222 -
real(specmap_time_min,dp))/
real(specmap_time_stp,dp))
225 i_gr = ceiling(((time/year_sec) &
226 -
real(specmap_time_min,dp))/
real(specmap_time_stp,dp))
227 i_gr = min(i_gr, ndata_specmap)
229 if (i_kl.eq.i_gr)
then
231 z_sl = specmap_zsl(i_kl)
235 time_kl = (specmap_time_min + i_kl*specmap_time_stp) *year_sec
236 time_gr = (specmap_time_min + i_gr*specmap_time_stp) *year_sec
238 z_sl = specmap_zsl(i_kl) &
239 +(specmap_zsl(i_gr)-specmap_zsl(i_kl)) &
240 *(time-time_kl)/(time_gr-time_kl)
246 z_sl = specmap_zsl(ndata_specmap)
253 if ( z_sl_old > -999999.9_dp )
then
254 dzsl_dtau = (z_sl-z_sl_old)/dtime
263 #if ( MARINE_ICE_CALVING==2 || MARINE_ICE_CALVING==3 )
265 #elif ( MARINE_ICE_CALVING==4 || MARINE_ICE_CALVING==5 )
266 z_mar = fact_z_mar*z_sl
267 #elif ( MARINE_ICE_CALVING==6 || MARINE_ICE_CALVING==7 )
268 if (z_sl >= -80.0_dp)
then
271 z_mar = 10.25_dp*(z_sl+80.0_dp)-200.0_dp
273 z_mar = fact_z_mar*z_mar
285 check_point(j,i) = .false.
291 if (maske(j,i).ge.2)
then
292 check_point(j ,i ) = .true.
293 check_point(j ,i+1) = .true.
294 check_point(j ,i-1) = .true.
295 check_point(j+1,i ) = .true.
296 check_point(j-1,i ) = .true.
303 if (check_point(j,i))
then
313 if (check_point(j,i))
then
314 maske(j,i) = maske_neu(j,i)
321 gamma_t = -6.5e-03_dp
331 temp_diff = gamma_t*(zs(j,i)-zs_ref(j,i)) + delta_ts
334 temp_mm(j,i,n) = temp_mm_present(j,i,n) + temp_diff
337 #elif (TSURFACE == 5)
342 temp_diff = gamma_t*(zs(j,i)-zs_ref(j,i))
345 temp_mm(j,i,n) = temp_mm_present(j,i,n) &
346 + glac_index*temp_mm_lgm_anom(j,i,n) &
354 temp_ma(j,i) = 0.0_dp
357 temp_ma(j,i) = temp_ma(j,i) + temp_mm(j,i,n)*inv_twelve
365 #if (ELEV_DESERT == 1)
367 gamma_p = gamma_p*1.0e-03_dp
369 zs_thresh = zs_thresh
373 #if (SOLID_PRECIP == 1) /* Marsiat (1994) */
380 inv_delta_temp_rain_snow = 1.0_dp/(temp_rain-temp_snow)
382 #elif (SOLID_PRECIP == 2) /* Bales et al. (2009) */
389 coeff(0) = 5.4714e-01_dp
390 coeff(1) = -9.1603e-02_dp
391 coeff(2) = -3.314e-03_dp
392 coeff(3) = 4.66e-04_dp
393 coeff(4) = 3.8e-05_dp
394 coeff(5) = 6.0e-07_dp
396 #elif (SOLID_PRECIP == 3) /* Huybrechts and de Wolde (1999) */
400 temp_snow = temp_rain
406 inv_sqrt2_s_stat = 1.0_dp/(sqrt(2.0_dp)*s_stat)
410 #if (ABLSURFACE==1 || ABLSURFACE==2)
413 beta1 = beta1_0 *(0.001_dp/86400.0_dp)*(rho_w/rho)
415 beta2 = beta2_0 *(0.001_dp/86400.0_dp)*(rho_w/rho)
418 mu = mu_0 *(1000.0_dp*86400.0_dp)*(rho/rho_w)
421 #elif (ABLSURFACE==3)
423 lambda_lti = lambda_lti *(0.001_dp/year_sec)*(rho_w/rho)
435 #if (ACCSURFACE <= 3)
439 #if (ELEV_DESERT == 0)
443 #elif (ELEV_DESERT == 1)
445 if (zs_ref(j,i) < zs_thresh)
then
447 = exp(gamma_p*(max(zs(j,i),zs_thresh)-zs_thresh))
450 = exp(gamma_p*(max(zs(j,i),zs_thresh)-zs_ref(j,i)))
454 stop
' boundary: Parameter ELEV_DESERT must be either 0 or 1!'
458 precip(j,i,n) = precip_present(j,i,n)*precip_fact
466 precip_fact = accfact
468 precip_fact = 1.0_dp + gamma_s*delta_ts
470 precip_fact = exp(gamma_s*delta_ts)
473 #if (ACCSURFACE <= 3)
475 precip(j,i,0) = 0.0_dp
478 precip(j,i,n) = precip(j,i,n)*precip_fact
479 precip(j,i,0) = precip(j,i,0) + precip(j,i,n)*inv_twelve
483 #elif (ACCSURFACE == 5)
485 precip(j,i,0) = 0.0_dp
489 #if (PRECIP_ANOM_INTERPOL==1)
490 precip_fact = 1.0_dp-glac_index+glac_index*precip_lgm_anom(j,i,n)
492 #elif (PRECIP_ANOM_INTERPOL==2)
493 precip_fact = exp(-glac_index*gamma_precip_lgm_anom(j,i,n))
497 precip(j,i,n) = precip_present(j,i,n)*precip_fact
498 precip(j,i,0) = precip(j,i,0) + precip(j,i,n)*inv_twelve
506 accum(j,i) = precip(j,i,0)
508 snowfall(j,i) = 0.0_dp
512 #if (SOLID_PRECIP == 1) /* Marsiat (1994) */
514 if (temp_mm(j,i,n) >= temp_rain)
then
516 else if (temp_mm(j,i,n) <= temp_snow)
then
519 frac_solid = (temp_rain-temp_mm(j,i,n))*inv_delta_temp_rain_snow
522 #elif (SOLID_PRECIP == 2) /* Bales et al. (2009) */
524 if (temp_mm(j,i,n) >= temp_rain)
then
526 else if (temp_mm(j,i,n) <= temp_snow)
then
529 frac_solid = coeff(0) + temp_mm(j,i,n) * ( coeff(1) &
530 + temp_mm(j,i,n) * ( coeff(2) &
531 + temp_mm(j,i,n) * ( coeff(3) &
532 + temp_mm(j,i,n) * ( coeff(4) &
533 + temp_mm(j,i,n) * coeff(5) ) ) ) )
537 #elif (SOLID_PRECIP == 3) /* Huybrechts and de Wolde (1999) */
539 frac_solid = 1.0_dp &
540 - 0.5_dp*
erfcc((temp_rain-temp_mm(j,i,n))*inv_sqrt2_s_stat)
544 snowfall(j,i) = snowfall(j,i) + precip(j,i,n)*frac_solid*inv_twelve
548 rainfall(j,i) = precip(j,i,0) - snowfall(j,i)
550 if (snowfall(j,i) < 0.0_dp) snowfall(j,i) = 0.0_dp
551 if (rainfall(j,i) < 0.0_dp) rainfall(j,i) = 0.0_dp
557 #if (ABLSURFACE==1 || ABLSURFACE==2)
562 temp_mm_help(n) = temp_mm(j,i,n)
565 call
pdd(temp_mm_help, s_stat, et(j,i))
572 if ((beta1*et(j,i)) <= (pmax*snowfall(j,i)))
then
573 melt_star(j,i) = beta1*et(j,i)
575 runoff(j,i) = melt(j,i)+rainfall(j,i)
577 melt_star(j,i) = pmax*snowfall(j,i)
578 melt(j,i) = beta2*(et(j,i)-melt_star(j,i)/beta1)
579 runoff(j,i) = melt(j,i)+rainfall(j,i)
582 #elif (ABLSURFACE==2)
584 if ( rainfall(j,i) <= (pmax*snowfall(j,i)) )
then
586 if ( (rainfall(j,i)+beta1*et(j,i)) <= (pmax*snowfall(j,i)) )
then
587 melt_star(j,i) = rainfall(j,i)+beta1*et(j,i)
589 runoff(j,i) = melt(j,i)
591 melt_star(j,i) = pmax*snowfall(j,i)
593 *(et(j,i)-(melt_star(j,i)-rainfall(j,i))/beta1)
594 runoff(j,i) = melt(j,i)
599 melt_star(j,i) = pmax*snowfall(j,i)
600 melt(j,i) = beta2*et(j,i)
601 runoff(j,i) = melt(j,i) + rainfall(j,i)-pmax*snowfall(j,i)
607 #elif (ABLSURFACE==3)
609 temp_jja_help = one_third*(temp_mm(j,i,6)+temp_mm(j,i,7)+temp_mm(j,i,8))
611 melt_star(j,i) = 0.0_dp
612 melt(j,i) = lambda_lti*max((temp_jja_help-temp_lti), 0.0_dp)
613 runoff(j,i) = melt(j,i) + rainfall(j,i)
623 as_perp(j,i) = accum(j,i) - evap(j,i) - runoff(j,i)
629 if (melt_star(j,i).ge.melt(j,i))
then
630 temp_s(j,i) = temp_ma(j,i) &
631 +mu*(melt_star(j,i)-melt(j,i))
633 temp_s(j,i) = temp_ma(j,i)
636 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...
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.