## Search found 321 matches

Thu Sep 07, 2023 4:59 pm America/New_York
Forum: Home
Question: Number Concentration from MERRA-2
Replies: 2

### Re: Number Concentration from MERRA-2

Hello,

Our MERRA-2 data and subject matter experts will examine your question and formulate a reply shortly.
Tue Aug 29, 2023 3:29 pm America/New_York
Forum: Home
Question: Magnitude and Unit of PM2.5, MERRA-2: Conversion Necessary?
Replies: 10

### Re: Magnitude and Unit of PM2.5, MERRA-2: Conversion Necessary?

From our data specialist: "I am glad that my previous response was helpful. The MERRA-2 reanalysis, including aerosol reanalysis, is not pure observation. It results from assimilating various observations into a model, i.e., the NASA GEOS model. Thus, you can use PM2.5 from the dataset M2TMNXAE...
Mon Aug 28, 2023 6:45 pm America/New_York
Forum: Home
Question: Magnitude and Unit of PM2.5, MERRA-2: Conversion Necessary?
Replies: 10

### Re: Magnitude and Unit of PM2.5, MERRA-2: Conversion Necessary?

From our data specialist: "Regarding the question posted at https://forum.earthdata.nasa.gov/viewtopic.php?t=4594&p=16264#p16264 , your method for calculating the monthly mean BCSMASS (M2TMNXAER) from the hourly mean (M2T1NXAER) is incorrect. The two datasets, i.e., M2T1NXAER for hourly mea...
Mon Aug 28, 2023 1:07 pm America/New_York
Forum: Home
Question: There is some confusion about data selection
Replies: 2

### Re: There is some confusion about data selection

Hello,

Our MERRA-2 data specialists will be examining your question. I have brought it to their attention.
Tue Aug 08, 2023 10:52 am America/New_York
Forum: Home
Question: How to calculate Total Aerosol Extinction AOT？Why is the AOT obtained dimensionless?
Replies: 1

### Re: How to calculate Total Aerosol Extinction AOT？Why is the AOT obtained dimensionless?

Hello,

Please inform us what data you are working with so that we can direct your question to the proper data specialists. Thank you!
Tue Aug 01, 2023 4:43 pm America/New_York
Forum: Home
Question: No more recent "SO2 AURAOMI; OMSO2: Aura/OMI Sulfur Dioxide Level 2 Product" files available.
Replies: 2

### Re: No more recent "SO2 AURAOMI; OMSO2: Aura/OMI Sulfur Dioxide Level 2 Product" files available.

Note that the data processing delay is also affecting Ozone Mapping and Profiler Suite (OMPS) data.
Tue Aug 01, 2023 4:41 pm America/New_York
Forum: Home
Question: No more recent "SO2 AURAOMI; OMSO2: Aura/OMI Sulfur Dioxide Level 2 Product" files available.
Replies: 2

### Re: No more recent "SO2 AURAOMI; OMSO2: Aura/OMI Sulfur Dioxide Level 2 Product" files available.

Wed Jul 19, 2023 3:47 pm America/New_York
Forum: Home
Question: Spatial Subsetting Applications
Replies: 10

### Re: Spatial Subsetting Applications

The GES DISC offers spatial subsetting for many datasets, accessible through the main data ordering interface. First search for the datasets of interest, using keywords in the search box on the home page. In the returned list, if the words "Subset/Get Data" appear under the dataset name, t...
Fri Jul 07, 2023 2:17 pm America/New_York
Forum: Home
Question: PIC Algorithms
Replies: 10

### Re: PIC Algorithms

By the way, here is the OBDAAC page on the PIC algorithm, if you have not seen it earlier.

https://oceancolor.gsfc.nasa.gov/resources/atbd/pic/
Fri Jul 07, 2023 2:07 pm America/New_York
Forum: Home
Question: PIC Algorithms
Replies: 10

### Re: PIC Algorithms

At this point you have gone beyond my basic understanding of the PIC algorithm, so I would recommend further correspondence with the OBDAAC staff. I will add the "OBDAAC" tag to this thread. It is my expectation that the chl-a product does not provide a good estimate of chlorophyll in Ehux.