Search found 314 matches

by GES DISC - jimacker
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...
by GES DISC - jimacker
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/
by GES DISC - jimacker
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.
by GES DISC - jimacker
Fri Jul 07, 2023 1:46 pm America/New_York
Forum: Home
Question: PIC Algorithms
Replies: 10

Re: PIC Algorithms

That's a good question. As I recall, the high reflectivity of the coccolithophores makes it difficult to properly estimate chlorophyll in cocco blooms. I think (though I can be corrected) that chl-a processing includes a coccolithophore bloom mask because of that interference. I.e., so much light is...
by GES DISC - jimacker
Thu Jun 29, 2023 12:16 pm America/New_York
Forum: Home
Question: Regarding bins in MERRA
Replies: 3

Re: Regarding bins in MERRA

Thank you for that information. The sea salt bin definitions are listed in this document:

https://gmao.gsfc.nasa.gov/reanalysis/MERRA-2/FAQ/Dust.pdf

Please reply for further information and assistance, if necessary.
by GES DISC - jimacker
Wed Jun 28, 2023 4:33 pm America/New_York
Forum: Home
Question: Regarding bins in MERRA
Replies: 3

Re: Regarding bins in MERRA

Regarding your question, can you provide a MERRA-2 document or web page where the term "bin" is used? Bin commonly refers to a data storage location in which all valid observations for a particular spatial resolution are kept, until averaging over a time period is performed to provide a va...
by GES DISC - jimacker
Tue Jun 27, 2023 11:54 am America/New_York
Forum: Home
Question: Getting data for a limited area
Replies: 5

Re: Getting data for a limited area

I'm glad you found this information useful. Can we assist you with the use of Giovanni?
by GES DISC - jimacker
Mon Jun 26, 2023 2:25 pm America/New_York
Forum: Home
Question: Getting data for a limited area
Replies: 5

Re: Getting data for a limited area

Feel free to ask more questions here, and also utilize our Help documentation. If you are unfamiliar with Giovanni, the User Guide should be useful. https://giovanni.gsfc.nasa.gov/giovanni/doc/UsersManualworkingdocument.docx.html
by GES DISC - jimacker
Mon Jun 26, 2023 2:12 pm America/New_York
Forum: Home
Question: Getting data for a limited area
Replies: 5

Re: Getting data for a limited area

Thomas, Hello. Though it might take some time, you could use our Giovanni system ( https://giovanni.gsfc.nasa.gov/ ) and generate time-series for specific locations, which could then be downloaded as both an image and as CSV data. Giovanni accepts lat/lon coordinates for specific locations. There ar...
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...