Scheduled Downtime
On Tuesday 24 October 2023 @ 5pm MT the forums will be in read only mode in preparation for the downtime. On Wednesday 25 October 2023 @ 5am MT, this website will be down for maintenance and expected to return online later in the morning.
Normal Operations
The forums are back online with normal operations. If you notice any issues or errors related to the forums, please reach out to help@ucar.edu

How to make history file at the initial time

Y

yhdchoi

YONGHAN CHOI
New Member
Hello,

I would like to run CAM4 alone, and make history file at the initial time.

For example, if I run CAM4, starting at 00 UTC 1 January 2020 for 10 days, I would like to obtain a history file at the initial time (i.e., 00 UTC 1 January).

If I set nhtfrq=-1, then I can obtain a history file after 1-h integration (i.e., 01 UTC 1 January), but no history file at the initial time.

Could you give me some advices on this issue?

Thank you for your kind help!
 
E

eaton

CSEG and Liaisons
For all output frequencies except monthly, the very first time sample in the history file is for nstep=0. This corresponds to an intermediate state between the initial conditions and the results of the first complete timestep. It will contain changes that have been made by the convective adjustment physics in subroutine tphysbc. And if you are running with the FV dycore there will also be a dynamic time step in the nstep=0 output.
 
You must log in or register to reply here.
Top