# OUTPUT\_LOCAL\_TIME "Y" for c1c2 c3 in NEI2017 emf run script **URL:** \ **Category:** NEI Modeling Platform\ **Created:** [September 12, 2021, 1:15pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647 "2021-09-12T13:15:25Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![Rypo](https://avatars.discourse-cdn.com/v4/letter/r/85f322/32.png) [@Rypo](https://forum.cmascenter.org/u/Rypo)\ **Post date:** [September 12, 2021, 1:15pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/1 "2021-09-12T13:15:25Z")
Hi, I have a quick question. I am not sure why OUTPUT\_LOCAL\_TIME “Y” for cmv\_c1c2 cmv\_c3 in NEI2017 EMF run script. Could I know the reason for this? If run model using emission with GMT, I should set OUTPUT\_LOCAL\_TIME “N", right? Thank you. ---
**Author:** ![eyth.alison](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@eyth.alison](https://forum.cmascenter.org/u/eyth.alison)\ **Post date:** [October 3, 2021, 1:23pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/2 "2021-10-03T13:23:57Z")
Because the hourly data is already in GMT. When OUTPUT\_LOCAL\_TIME is set to “Y” it passes through the hourly temporalized values without a time zone adjustment. So, even though it says OUTPUT\_LOCAL\_TIME it is really outputting GMT. ---
**Author:** ![Rypo](https://avatars.discourse-cdn.com/v4/letter/r/85f322/32.png) [@Rypo](https://forum.cmascenter.org/u/Rypo)\ **Post date:** [October 3, 2021, 1:47pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/3 "2021-10-03T13:47:50Z")
Thank you for your reply. Is it still output GMT if I delete this flag for cmv but still with setenv OUTZONE “0”? ---
**Author:** ![bbaek](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/bbaek/32/22_2.png) [@bbaek](https://forum.cmascenter.org/u/bbaek)\ **Post date:** [October 3, 2021, 4:46pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/4 "2021-10-03T16:46:42Z")
No. If you set it to N, then SMOKE will think CMV hourly inventory is in local time and apply the time shift So you need to set it to Y for CMV processing ---
**Author:** ![Rypo](https://avatars.discourse-cdn.com/v4/letter/r/85f322/32.png) [@Rypo](https://forum.cmascenter.org/u/Rypo)\ **Post date:** [October 3, 2021, 5:13pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/5 "2021-10-03T17:13:27Z")
Thank you for your reply. If set N, which time zone will it shift to? or which flag will decide the time zone it shifts to? ---
**Author:** ![bbaek](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.cmascenter.org/bbaek/32/22_2.png) [@bbaek](https://forum.cmascenter.org/u/bbaek)\ **Post date:** [October 3, 2021, 6:50pm UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/6 "2021-10-03T18:50:56Z")
Here is the information on how the time zones are handled in SMOKE. Temporal program will perform the time shift by FIPS (county/state/county). [https://www.cmascenter.org/smoke/documentation/4.8.1/html/ch02s10s04.html](https://www.cmascenter.org/smoke/documentation/4.8.1/html/ch02s10s04.html) ---
**Author:** ![eyth.alison](https://avatars.discourse-cdn.com/v4/letter/e/7ab992/32.png) [@eyth.alison](https://forum.cmascenter.org/u/eyth.alison)\ **Post date:** [October 4, 2021, 3:04am UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/7 "2021-10-04T03:04:49Z")
Why are you considering changing it? ---
**Author:** ![Rypo](https://avatars.discourse-cdn.com/v4/letter/r/85f322/32.png) [@Rypo](https://forum.cmascenter.org/u/Rypo)\ **Post date:** [October 4, 2021, 3:27am UTC](https://forum.cmascenter.org/t/output-local-time-y-for-c1c2-c3-in-nei2017-emf-run-script/2647/8 "2021-10-04T03:27:26Z")
I deleted this flag when I ran CMV, then merged emission, converted and ran WRF/Chem before. Just wanted to make sure although I deleted this flag, I set OUTZONE is “0”, will it time shift to GMT, so I don’t have to rerun. Anyway, I think I need to rerun CMV and redo those things. Thank you for your and bbaek’s reply!