Search found 314 matches

by GES DISC - jimacker
Tue Jun 13, 2023 2:23 pm America/New_York
Forum: Home
Question: Background Color
Replies: 6

Re: Background Color

It appears that you are looking at a file from the Ocean Biology Distributed Active Archive Center (OBDAAC). What tool/software are you using to examine the data? Further replies will likely be from an OBDAAC staff member - I'm asking that question to help them out in answering your query.
by GES DISC - jimacker
Mon Jun 12, 2023 8:31 pm America/New_York
Forum: Home
Question: Background Color
Replies: 6

Re: Background Color

Hello,

Sorry for additional questions, but what is the name of the data variable you are examining?

I/we are just attempting to determine which data center should address your question.
by GES DISC - jimacker
Mon Jun 12, 2023 12:55 pm America/New_York
Forum: Home
Question: Background Color
Replies: 6

Re: Background Color

Hello,

What data are you working with, or alternatively, what data center is this question directed to?
by GES DISC - jimacker
Tue Jun 06, 2023 1:39 pm America/New_York
Forum: Home
Question: Questions about data synthesis
Replies: 11

Re: Questions about data synthesis

I'm glad you are able to access Giovanni.

When you can, please inform me if this will help with your research efforts.
by GES DISC - jimacker
Tue Jun 06, 2023 1:35 pm America/New_York
Forum: Home
Question: Questions about data synthesis
Replies: 11

Re: Questions about data synthesis

I'm glad you are able to access Giovanni.

When you can, please inform me if this will help with your research efforts.
by GES DISC - jimacker
Thu Jun 01, 2023 11:34 am America/New_York
Forum: Home
Question: Wind speed and direction for terrestrial ecology
Replies: 4

Re: Wind speed and direction for terrestrial ecology

Further information: GLDAS only has windspeed, not direction. This URL selects the GLDAS windspeed variables (different temporal resolutions). https://giovanni.gsfc.nasa.gov/giovanni/#service=TmAvMp&starttime=&endtime=&variableFacets=dataFieldMeasurement%3AWind%3BdataProductPlatformInstr...
by GES DISC - jimacker
Thu Jun 01, 2023 11:28 am America/New_York
Forum: Home
Question: Wind speed and direction for terrestrial ecology
Replies: 4

Re: Wind speed and direction for terrestrial ecology

Chloe, I would recommend using our Giovanni system, https://giovanni.gsfc.nasa.gov/ . It provides windspeed and wind direction data from both the Global Land Data Assimilation System (GLDAS) and the Modern-Era Retrospective analysis for Research and Applications Version 2 (MERRA-2). Giovanni is not ...
by GES DISC - jimacker
Wed May 31, 2023 12:41 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 MERRA-2 staff: you may have seen this, but this also confirms the conversion factor. Here is the related information about converting the surface PM2.5 units from kg/m3 to micro-grams/m3 PM2.5 = (DUSMASS25 + OCSMASS+ BCSMASS + SSSMASS25 + SO4SMASS*1.375) *1.e9 # To convert MERRA-2 aerosol o...
by GES DISC - jimacker
Wed May 31, 2023 11:24 am 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?

Hello. In answer to your first question, this is a simple units conversion, so the multiplication factor would be generally applicable. I am not an atmospheric scientist, but I expect that the use of μg / m^3 is much more common, both because the numbers are easy to comprehend and because of the act...
by GES DISC - jimacker
Tue May 30, 2023 1:48 pm America/New_York
Forum: Home
Question: Sentinel 5P NO2 Tropospheric vertical column data mapping
Replies: 2

Re: Sentinel 5P NO2 Tropospheric vertical column data mapping

I apologize for the delay in this reply, as we have considered various causes of negative values in the data retrieval. Assuming the negative values aren't coming from fill values, they are not that uncommon, and can arise for a number of reasons. E.g. the atmosphere modelled is not a good represent...