Search found 335 matches

by GES DISC - jimacker
Fri Jun 16, 2023 1:46 pm America/New_York
Forum: Home
Question: MERRA-2 skin temperature, effective skin temperature
Replies: 1

Re: MERRA-2 skin temperature, effective skin temperature

Hello, I apologize for the delay in this response. I can answer part of your question, and we will ask our subject matter experts for additional information. Over most of the ocean, the MERRA-2 skin surface temperature is close to the oceanographic SST. There are larger differences in the polar regi...
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...