ROMS Adjoint

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Negative Ritz value found

Last post by xiaocongM « Wed May 18, 2022 9:58 am

by xiaocongM » Wed May 18, 2022 9:58 am

0 Replies

75 Views

Last post by xiaocongM
Wed May 18, 2022 9:58 am
An error about filename in I4DVAR

Last post by smartboy « Fri Apr 29, 2022 5:59 am

by smartboy » Fri Apr 29, 2022 5:59 am

0 Replies

129 Views

Last post by smartboy
Fri Apr 29, 2022 5:59 am
Which ROMS source version to use for the 4DVar tutorial

Last post by stef « Thu Feb 17, 2022 2:58 pm
Replies: 3
by stef » Thu Feb 17, 2022 9:59 am

3 Replies

402 Views

Last post by stef
Thu Feb 17, 2022 2:58 pm
I4DVAR - Negative Ritz value found

Last post by smartboy « Thu Jan 20, 2022 6:41 am

by smartboy » Thu Jan 20, 2022 6:41 am

0 Replies

226 Views

Last post by smartboy
Thu Jan 20, 2022 6:41 am
Problems about adding tidal forcing in 4DVar

Last post by hezhiwei « Tue Aug 03, 2021 6:19 am
Replies: 4
by hezhiwei » Thu Jul 29, 2021 9:49 am

4 Replies

1029 Views

Last post by hezhiwei
Tue Aug 03, 2021 6:19 am
INP_PAR, PHYPAR: Problems finding input file.

Last post by wilkin « Fri Jul 30, 2021 11:45 am
Replies: 7
by birgitrr » Tue Jul 27, 2021 1:59 pm

7 Replies

1084 Views

Last post by wilkin
Fri Jul 30, 2021 11:45 am
nonlinear cost function not calculated in PSAS

Last post by Rafael_Santana « Wed Jul 28, 2021 12:28 am
Replies: 2
by Johannes » Tue Feb 28, 2017 2:32 pm

2 Replies

2199 Views

Last post by Rafael_Santana
Wed Jul 28, 2021 12:28 am
AKv and AKt in initial condition file

Last post by rtoste « Tue Jul 13, 2021 5:20 pm
Replies: 2
by rtoste » Fri Jul 09, 2021 9:38 pm

2 Replies

950 Views

Last post by rtoste
Tue Jul 13, 2021 5:20 pm
4DVAR assimilation of surface velocities destroy sst

Last post by jivica « Wed May 26, 2021 2:39 am
Replies: 5
by xavierC » Thu Jan 30, 2020 10:07 am

5 Replies

2075 Views

Last post by jivica
Wed May 26, 2021 2:39 am
observation data rejected!

Last post by Rafael_Santana « Mon May 03, 2021 11:14 pm
Replies: 8
by simion1232006 » Fri Oct 29, 2010 2:18 am

8 Replies

4931 Views

Last post by Rafael_Santana
Mon May 03, 2021 11:14 pm
I4dvar compilation error in new version about get_hash.f90

Last post by MIKESHEN « Sun Apr 11, 2021 1:31 am
Replies: 2
by MIKESHEN » Sat Apr 10, 2021 1:27 pm

2 Replies

675 Views

Last post by MIKESHEN
Sun Apr 11, 2021 1:31 am
i4dvar ex1 blowup at first time step

Last post by briskbamboo « Thu Mar 04, 2021 5:17 am

by briskbamboo » Thu Mar 04, 2021 5:17 am

0 Replies

465 Views

Last post by briskbamboo
Thu Mar 04, 2021 5:17 am
parallel RPCG minimization (Andy & Hernan & Brian)?

Last post by jivica « Wed Jan 13, 2021 4:37 am
Replies: 1
by jivica » Tue Jan 12, 2021 2:54 am

1 Replies

794 Views

Last post by jivica
Wed Jan 13, 2021 4:37 am
tidal constituents

Last post by pooran « Mon Dec 14, 2020 5:13 am

by pooran » Mon Dec 14, 2020 5:13 am

0 Replies

578 Views

Last post by pooran
Mon Dec 14, 2020 5:13 am
tidal constituents

Last post by johnluick « Sat Oct 31, 2020 10:37 am
Replies: 1
by pooran » Fri Oct 30, 2020 12:18 pm

1 Replies

832 Views

Last post by johnluick
Sat Oct 31, 2020 10:37 am
station file

Last post by arango « Tue Oct 13, 2020 5:39 am
Replies: 3
by jivica » Mon Oct 12, 2020 4:59 am

3 Replies

1063 Views

Last post by arango
Tue Oct 13, 2020 5:39 am
How to build the ADM individually?

Last post by LiZhou « Mon Sep 28, 2020 1:06 pm
Replies: 2
by LiZhou » Sun Sep 27, 2020 7:38 am

2 Replies

922 Views

Last post by LiZhou
Mon Sep 28, 2020 1:06 pm
Can roms be used to assimilate suspended sediment ?

Last post by lairuixun « Mon Sep 28, 2020 8:31 am

by lairuixun » Mon Sep 28, 2020 8:31 am

0 Replies

514 Views

Last post by lairuixun
Mon Sep 28, 2020 8:31 am
give maximum weight to data

Last post by jsouza « Sun Sep 27, 2020 6:45 pm
Replies: 1
by xavierC » Fri Sep 25, 2020 12:20 pm

1 Replies

846 Views

Last post by jsouza
Sun Sep 27, 2020 6:45 pm
How to use ECMWF product

Last post by javadi « Tue Sep 15, 2020 2:30 pm
Replies: 4
by javadi » Mon Sep 14, 2020 1:57 pm

4 Replies

1537 Views

Last post by javadi
Tue Sep 15, 2020 2:30 pm
Avg file output for NLM sweep instead of ADJ?

Last post by jivica « Fri Sep 11, 2020 6:15 am

by jivica » Fri Sep 11, 2020 6:15 am

0 Replies

656 Views

Last post by jivica
Fri Sep 11, 2020 6:15 am
I4DVAR hang with "<<<< Conjugate Gradient Algorithm >>>>"

Last post by briskbamboo « Fri Aug 28, 2020 2:19 am

by briskbamboo » Fri Aug 28, 2020 2:19 am

0 Replies

728 Views

Last post by briskbamboo
Fri Aug 28, 2020 2:19 am
RBL4DVAR error after upgrade to SVN Revision 1036

Last post by xavierC « Wed Aug 26, 2020 7:28 am
Replies: 2
by xavierC » Tue Aug 25, 2020 2:54 pm

2 Replies

921 Views

Last post by xavierC
Wed Aug 26, 2020 7:28 am
Adjoint model blow up

Last post by ljxu « Tue Jul 28, 2020 12:09 pm
Replies: 13
by ymamoutos » Fri Apr 17, 2020 8:17 pm

13 Replies

4185 Views

Last post by ljxu
Tue Jul 28, 2020 12:09 pm
Offline Heat Budget calculations from ROMS model output

Last post by fabeobd « Fri Jun 26, 2020 10:19 am
Replies: 13
by aneeshcs » Tue Oct 11, 2011 3:50 am

13 Replies

11409 Views

Last post by fabeobd
Fri Jun 26, 2020 10:19 am
I4dvar compilation error about i4dvar.f90 and mod_fourdvar

Last post by MIKESHEN « Fri May 29, 2020 1:26 pm
Replies: 3
by MIKESHEN » Tue May 26, 2020 1:38 pm

3 Replies

1480 Views

Last post by MIKESHEN
Fri May 29, 2020 1:26 pm
Where to introduce obs error

Last post by xavierC « Thu Apr 02, 2020 7:09 pm
Replies: 2
by xavierC » Thu Apr 02, 2020 6:50 pm

2 Replies

1065 Views

Last post by xavierC
Thu Apr 02, 2020 7:09 pm
Adjoint compilation error with define VISC4 and DIFF4

Last post by robertson « Thu Mar 05, 2020 3:14 pm
Replies: 1
by xavierC » Wed Feb 26, 2020 4:07 pm

1 Replies

1005 Views

Last post by robertson
Thu Mar 05, 2020 3:14 pm
I4DVAR rewriting roms_ini.nc with new time unit

Last post by xavierC « Thu Jan 09, 2020 4:47 pm
Replies: 1
by xavierC » Thu Jan 09, 2020 3:30 pm

1 Replies

841 Views

Last post by xavierC
Thu Jan 09, 2020 4:47 pm
how to conduct adjoint sensitivity by ROMS ADM?

Last post by LiZhou « Mon Jan 06, 2020 1:58 am
Replies: 1
by LiZhou » Sun Jan 05, 2020 8:22 am

1 Replies

854 Views

Last post by LiZhou
Mon Jan 06, 2020 1:58 am
Adjoint Sensitivity Driver

Last post by LiZhou « Sun Jan 05, 2020 8:36 am
Replies: 1
by arango » Wed Sep 21, 2005 3:10 am

1 Replies

3034 Views

Last post by LiZhou
Sun Jan 05, 2020 8:36 am
run_roms_da data assimilation script

Last post by jpm « Fri Nov 22, 2019 1:40 am

by jpm » Fri Nov 22, 2019 1:40 am

0 Replies

1045 Views

Last post by jpm
Fri Nov 22, 2019 1:40 am
W4DPSAS: not positive definite algorithm

Last post by Biswamoy_Paul « Mon Aug 26, 2019 5:02 am

by Biswamoy_Paul » Mon Aug 26, 2019 5:02 am

0 Replies

1063 Views

Last post by Biswamoy_Paul
Mon Aug 26, 2019 5:02 am
How to build a adjoint modelling framework in ROMS?

Last post by LiZhou « Tue Aug 20, 2019 1:09 am
Replies: 1
by LiZhou » Tue Aug 20, 2019 12:48 am

1 Replies

1087 Views

Last post by LiZhou
Tue Aug 20, 2019 1:09 am
CG_DELTA not positive OR Negative Ritz value found.

Last post by xavierC « Wed Jul 10, 2019 8:29 am

by xavierC » Wed Jul 10, 2019 8:29 am

0 Replies

992 Views

Last post by xavierC
Wed Jul 10, 2019 8:29 am
depth of assimilated data

Last post by jivica « Fri Jun 21, 2019 4:51 am
Replies: 2
by xavierC » Thu Jun 20, 2019 8:30 am

2 Replies

1459 Views

Last post by jivica
Fri Jun 21, 2019 4:51 am
Inconsistent values of variables in TL initial condition

Last post by wavewatch « Wed Apr 24, 2019 2:55 am
Replies: 3
by Biswamoy_Paul » Thu Jul 19, 2018 1:32 pm

3 Replies

2073 Views

Last post by wavewatch
Wed Apr 24, 2019 2:55 am
ad passive tracer!

Last post by jcwarner « Fri Mar 29, 2019 12:32 pm
Replies: 1
by thaitlhp » Fri Mar 29, 2019 8:15 am

1 Replies

1218 Views

Last post by jcwarner
Fri Mar 29, 2019 12:32 pm
what are the meanings of adjoint model's input and output

Last post by LiZhou « Wed Jan 23, 2019 6:50 am
Replies: 3
by LiZhou » Tue Oct 23, 2018 8:14 am

3 Replies

2019 Views

Last post by LiZhou
Wed Jan 23, 2019 6:50 am
Segmentation fault with I4DVAR

Last post by pmuskee « Fri Nov 30, 2018 2:12 pm

by pmuskee » Fri Nov 30, 2018 2:12 pm

0 Replies

1094 Views

Last post by pmuskee
Fri Nov 30, 2018 2:12 pm
Optimal Stochastic Calculation

Last post by LiZhou « Tue Oct 16, 2018 12:12 pm
Replies: 1
by cesare » Mon Jun 04, 2007 9:10 pm

1 Replies

3057 Views

Last post by LiZhou
Tue Oct 16, 2018 12:12 pm
book for adjoint analysis

Last post by j.throatlocust « Wed Oct 10, 2018 12:48 pm
Replies: 1
by fcampos » Sun Oct 07, 2018 6:25 pm

1 Replies

1572 Views

Last post by j.throatlocust
Wed Oct 10, 2018 12:48 pm
d_ssh_obs.m

Last post by isoares « Wed Sep 26, 2018 11:43 am

by isoares » Wed Sep 26, 2018 11:43 am

0 Replies

1281 Views

Last post by isoares
Wed Sep 26, 2018 11:43 am
Tangent Initial Norm is NaN

Last post by ckerry « Mon Jul 23, 2018 12:00 am
Replies: 2
by leon » Wed Jul 01, 2015 4:23 pm

2 Replies

2964 Views

Last post by ckerry
Mon Jul 23, 2018 12:00 am
Can't run my IS4D-Var case Gnorm = NaN

Last post by ckerry « Sun Jul 22, 2018 11:55 pm
Replies: 8
by Arvin_Yin » Sat Sep 26, 2015 7:52 am

8 Replies

4954 Views

Last post by ckerry
Sun Jul 22, 2018 11:55 pm
Initial gradient norm, Gnorm = NaN

Last post by ckerry « Sun Jul 22, 2018 11:45 pm
Replies: 1
by wavewatch » Wed Mar 28, 2018 1:38 am

1 Replies

1597 Views

Last post by ckerry
Sun Jul 22, 2018 11:45 pm
data

Last post by sara.oceanography « Sun Jul 15, 2018 3:11 am

by sara.oceanography » Sun Jul 15, 2018 3:11 am

0 Replies

1443 Views

Last post by sara.oceanography
Sun Jul 15, 2018 3:11 am
How to restart the IS4DVAR date assimilation system？

Last post by wavewatch « Tue Jul 10, 2018 5:31 am

by wavewatch » Tue Jul 10, 2018 5:31 am

0 Replies

1524 Views

Last post by wavewatch
Tue Jul 10, 2018 5:31 am
weird iteration number in mod.nc file

Last post by leon « Tue Jun 19, 2018 4:29 pm

by leon » Tue Jun 19, 2018 4:29 pm

0 Replies

1563 Views

Last post by leon
Tue Jun 19, 2018 4:29 pm
Normalization coefficients

Last post by isoares « Tue May 15, 2018 5:37 pm
Replies: 4
by isoares » Fri May 11, 2018 12:46 pm

4 Replies

3080 Views

Last post by isoares
Tue May 15, 2018 5:37 pm

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