Search found 42 matches

by GES DISC - cbattisto
Mon Oct 05, 2026 4:52 pm America/New_York
Forum: Home
Question: Black Carbon
Replies: 1

Re: Black Carbon

This appears to be a duplicated question answered in this previous forum post: viewtopic.php?t=8201.

Please consult that forum post and let us know if you have any more questions.
by GES DISC - cbattisto
Mon Oct 05, 2026 4:50 pm America/New_York
Forum: Home
Question: Black Carbon
Replies: 1

Re: Black Carbon

Dear User, Total deposition = dry deposition + wet deposition: BCDP001 + BCDP002 + BCWT001 + BCWT002 Total loss additionally includes sedimentation and convective scavenging: BCDP001 + BCDP002 + BCSD001 + BCSD002 + BCWT001 + BCWT002 + BCSV001 + BCSV002 For the physical processes, consult the GMAO Su...
by GES DISC - cbattisto
Wed Sep 30, 2026 1:43 pm America/New_York
Forum: Home
Question: Why is BCWT001 equal to zero globally?
Replies: 3

Re: Why is BCWT001 equal to zero globally?

Dear User, Total deposition consists of dry and wet deposition: Dry deposition: BCDP001 + BCDP002 Wet deposition: BCWT001 + BCWT002 Total loss includes these terms plus BCSD001 + BCSD002 + BCSV001 + BCSV002: BCDP001 + BCDP002 + BCSD001 + BCSD002 + BCWT001 + BCWT002 + BCSV001 + BCSV002 Regards, GES D...
by GES DISC - cbattisto
Tue Sep 22, 2026 4:24 pm America/New_York
Forum: Home
Question: Trouble Accessing MERRA2_CNN_HAQAST_PM25 dataset with Earthaccess and EarthData Search, though files available at DAAC
Replies: 4

Re: Trouble Accessing MERRA2_CNN_HAQAST_PM25 dataset with Earthaccess and EarthData Search, though files available at DA

Dear user,

Thank you for your patience on this matter.

We have corrected and re-published the problematic metadata fields, which should allow your query to work as normal. Please try again, and let us know if you need any other assistance.

Regards,
GES DISC User Services
by GES DISC - cbattisto
Mon Sep 14, 2026 2:37 pm America/New_York
Forum: Home
Question: Deposition data
Replies: 3

Re: Deposition data

Dear user,

The previous equation sent should be considered as the total loss of the aerosols from the atmosphere to the surface. In the real world, there could be a loss in aerosol due to chemical processes however that isn't accounted for in the model.

Regards,
GES DISC User Services
by GES DISC - cbattisto
Fri Sep 11, 2026 2:25 pm America/New_York
Forum: Home
Question: Deposition data
Replies: 3

Re: Deposition data

Dear User,

Here is a response from the GMAO team:

Total loss = BCDP001 + BCDP002 + BCSD001 + BCSD002 + BCWT001 + BCWT002 + BCSV001 + BCSV002.

Nothing is double counted by using all of the terms in this equation for the total loss.

Regards,
GES DISC User Services
by GES DISC - cbattisto
Fri Sep 11, 2026 2:09 pm America/New_York
Forum: Home
Question: Why is BCWT001 equal to zero globally?
Replies: 3

Re: Why is BCWT001 equal to zero globally?

Dear User, Thank you for contacting us. Here are some answers from the GMAO team: Bin 1 of carbon is hydrophobic, bin 2 is hydrophilic BCWT001 is expected to be zero because wet deposition does not act on hydrophobic particles For completeness, I always like to include BCWT001 when I write out the e...
by GES DISC - cbattisto
Fri Sep 11, 2026 11:23 am America/New_York
Forum: Home
Question: Clarification on variables required to calculate total black carbon deposition from MERRA-2 and globally zero BCWT001 va
Replies: 1

Re: Clarification on variables required to calculate total black carbon deposition from MERRA-2 and globally zero BCWT00

Hello, To compute the total loss, you would need to add dry deposition, wet deposition, and sedimentation as suggested but also convective scavenging (BCSV001 and BCSV002). There is no double counting going on. Sedimentation and dry deposition occur as two separate processes within GOCART. Thank you...
by GES DISC - cbattisto
Tue Sep 08, 2026 5:42 pm America/New_York
Forum: Home
Question: Trouble Accessing MERRA2_CNN_HAQAST_PM25 dataset with Earthaccess and EarthData Search, though files available at DAAC
Replies: 4

Re: Trouble Accessing MERRA2_CNN_HAQAST_PM25 dataset with Earthaccess and EarthData Search, though files available at DA

Hello Carl, Thank you for reporting this. We were able to verify that the granules do exist, but for some reason, certain granules have a sub-global bounding box limit in their CMR records. In October 2024, they have a bounding box limit over North America ([21.1546, -131.6533, 53.03837, -58.79196])...
by GES DISC - cbattisto
Thu Feb 26, 2026 4:41 pm America/New_York
Forum: Home
Question: Unable to run API call to Giovanni
Replies: 5

Re: Unable to run API call to Giovanni

There is a "Login" button on the top right of the page, next to "Feedback" and "Help". Once you click that, you will be redirected to the Earthdata Login page, and then sent back to Giovanni. If you are able to log in and use the website, you should be able to use the A...