MLS ozone data v4 versus. v5

[wmingch1992]

Hi,

I found there exist some periods that we could find MLS ozone data in version 4, but not in version 5. For instance, I could find MLS ozone data of Version 4 for Feb 2005, but not in version 5. I was wondering what causes that. Thanks in advance for your help.

Best,
Mingcheng

[GES DISC - jimacker]

Hello,

We will look into your question, but may not be able to get an answer until next week. Are you attempting to obtain this data from the Goddard Earth Sciences Data and Information Services Center (GES DISC)?

[wmingch1992]

Hi,

Thanks for your reply. Yes, I use GES DISC to download the data. Here is the website I try to download the MLS v5 data: https://disc.gsfc.nasa.gov/datasets/ML2 ... 2014-12-31. I choose the period between 02/01/2005 and 02/28/2005, but zero files found as it shows. At the same time, I try MLS v4 data: https://disc.gsfc.nasa.gov/datasets/ML2 ... 2014-12-31 , I could find the data between 02/01/2005 and 02/28/2005.

Happy holidays!
Mingcheng

[GES DISC - jimacker]

We are examining the issue for which you have provided this information. We will attempt to return an answer shortly.

[GES DISC - jimacker]

Here is the answer regarding the MLS data from our scientific staff. This is current as of 1-6-2021, as the data gaps listed will be filled as the reprocessing continues.

"The v5 MLS was first released on June 11, 2020. Because it takes a long time to reprocess the full data record, the MLS team opted to deliver the data in the forward stream first, and then begin reprocessing the older files in batches based on their own reprocessing priorities, not sequentially from the start of the mission. It appears that as of now, most of the data from 01-Jan-2008 forward have been reprocessed, but there are still gaps. Bigger gaps exist before 2008."

Missing days:
13-Aug-2004 to 30-Sep-2004
01-Nov-2004 to 31-Dec-2004
01-Feb-2005 to 31-Mar-2005
01-May-2005 to 30-Jun-2005
01-Aug-2005 to 30-Sep-2005
01-Nov-2005 to 31-Dec-2005
01-Feb-2006 to 03-Apr-2006
01-May-2006 to 30-Jun-2006
01-Sep-2006 to 30-Sep-2006
01-Nov-2006 to 31-Dec-2006
26-Jun-2007 to 28-Jun-2007
27-Aug-2007 to 29-Sep-2007
01-Nov-2007 to 31-Dec-2007
27-Mar-2011 to 18-Apr-2011
19-Feb-2012 to 23-Feb-2012
15-Mar-2012 to 20-Mar-2012
21-Jun-2018 to 25-Jun-2018
10-Jul-2018 to 18-Jul-2018
28-Jan-2019 to 30-Jan-2019
10-Dec-2019

For full details see the v5 MLS operations processing calendar at https://mls.jpl.nasa.gov/cal/