A strange issue with biogenic emissions at 00:00 UTC for 12z-cycle NRT runs

[JianpingHuang-NOAA]

It has been observed that biogenic emissions, such as isoprene (ISOP) and terpene (Terp), exhibit a sudden decrease in concentration as time progresses from 23:00 to 00:00 UTC.

Please see the figures for ISOP on 20230510 at 12z cycle run

1. Isoprene emissions at 23:00 UTC on May-10-2023: Slide 2

2. Isoprene emissions at 00:00 UTC on May-11-2023: Slide 3

It seems that we did not see a similar issue at 06z cycle

https://docs.google.com/presentation/d/1wjHb96sdllXm2OLnCJ6RJnDbwx6VlZMQSB7nAmpt_4w/edit#slide=id.g242d2dd8710_0_0

The NEXUS output file for 12z cycle on 20230510 is available on Cactus

/lfs/h2/emc/ptmp/jianping.huang/emc.para/com/aqm/v7.0/aqm.20230510/12