Search found 321 matches

by GES DISC - jimacker
Thu Feb 22, 2024 8:32 pm America/New_York
Forum: Home
Question: Accessing lat and lon for MODIS-Aqua 4km Chlorophyll
Replies: 1

Re: Accessing lat and lon for MODIS-Aqua 4km Chlorophyll

Hello,

You could use Giovanni (https://giovanni.gsfc.nasa.gov/) to create an animated GIF of the MODIS-Aqua monthly chlorophyll data product. Please reply for more guidance if this would be of interest to you.
by GES DISC - jimacker
Wed Feb 07, 2024 9:33 pm America/New_York
Forum: Home
Question: Albedo data by city
Replies: 4

Re: Albedo data by city

One more note about Giovanni; after you have defined your city boundaries, you can then created an Area-Averaged Time Series that will average the albedo values over the entire bounding box, and provide a time-series of values according to the temporal resolution of the variable. This time-series ca...
by GES DISC - jimacker
Wed Feb 07, 2024 9:28 pm America/New_York
Forum: Home
Question: Albedo data by city
Replies: 4

Re: Albedo data by city

Hello, There are different types of albedo data in our Giovanni system. Click on the link below to access Giovanni with these variables selected. Giovanni is not difficult to use; you can examine the User Guide to get started, and I will be glad to assist if you encounter difficulty. https://giovann...
by GES DISC - jimacker
Wed Dec 13, 2023 7:31 pm America/New_York
Forum: Home
Question: MERRA2 wget "Unable to establish SSL connection"
Replies: 2

Re: MERRA2 wget "Unable to establish SSL connection"

Thank you for informing us.
by GES DISC - jimacker
Thu Nov 30, 2023 1:45 pm America/New_York
Forum: Home
Question: can't find MODIS land surface temperature and vegetation index data in Giovanni
Replies: 1

Re: can't find MODIS land surface temperature and vegetation index data in Giovanni

Due to changes at the data center which provides the NDVI data, we can no longer use the search method that was used by Giovanni to find the data according to the user specifications. NDVI data can be visualized with Worldview ( https://worldview.earthdata.nasa.gov ) , and the data is actually from ...
by GES DISC - jimacker
Tue Nov 28, 2023 4:21 pm America/New_York
Forum: Home
Question: Level 3 Daily CO2, NO2
Replies: 4

Re: Level 3 Daily CO2, NO2

The daily data will usually have gaps due to satellite scanning patterns and conditions that affect data quality. I cannot provide a lot of insight on the OCO technique, except to note that because atmospheric CO2 is a well-mixed gas, it is computationally simpler to fill the gaps via assimilated da...
by GES DISC - jimacker
Mon Nov 27, 2023 12:16 pm America/New_York
Forum: Home
Question: Level 3 Daily CO2, NO2
Replies: 4

Re: Level 3 Daily CO2, NO2

Hello. The Giovanni system has daily Level 3 CO2, NO2, and CH4 from the Orbiting Carbon Observatory, the Ozone Measuring Instrument, and AIRS, respectively. I have created a URL for these variables in Giovanni, provided below. Note that for CH4 from AIRS, a pressure level must be provided. 1000 hPA ...
by GES DISC - jimacker
Thu Nov 23, 2023 9:59 pm America/New_York
Forum: Home
Question: Looking for time-averaged Monthly chlorophyll-a estimations for Lake Apopka, FL
Replies: 6

Re: Looking for time-averaged Monthly chlorophyll-a estimations for Lake Apopka, FL

The only chlorophyll data we are set up to support in Giovanni is the MODIS-Aqua Level 3 data product. To get higher resolution data from MERIS, VIIRS, or OLCI, you would have to contact the data provider. I hope you will be able to use Giovanni effectively.
by GES DISC - jimacker
Tue Nov 21, 2023 4:23 pm America/New_York
Forum: Home
Question: MERRA-2 skin temperaute
Replies: 2

Re: MERRA-2 skin temperaute

Hello, Our apologies for the delay in this reply. Our MERRA-2 Subject Matter Expert has provided this preliminary answer with a request for more information. Over the ocean, both MERRA2 and ERA5 read in SST observations, Over land, ERA5 assimilates near surface air temperature and moisture, while ME...