MERRA-2 skin temperaute

Use this Forum to find information on, or ask a question about, NASA Earth Science data.
Post Reply
Posts: 1
Joined: Tue Nov 14, 2023 3:29 am America/New_York
Answers: 0

MERRA-2 skin temperaute

by 4011 » Tue Nov 14, 2023 3:37 am America/New_York

I would like to ask whether the skin surface temperature is the theoretical temperature or the measured temperature, because the temperature trend I drew using the theoretical temperature of ERA5 is rising, but the change is slight in MERRA-2.


Posts: 207
Joined: Wed Sep 25, 2019 9:35 am America/New_York
Answers: 2
Been thanked: 1 time

Re: MERRA-2 skin temperaute

by mgreene » Tue Nov 14, 2023 2:10 pm America/New_York

Our MERRA-2 data and subject matter experts will examine your question and formulate a reply shortly.

GES DISC - jimacker
User Services
User Services
Posts: 337
Joined: Mon Sep 30, 2019 1:57 pm America/New_York
Answers: 3
Has thanked: 2 times
Been thanked: 4 times

Re: MERRA-2 skin temperaute

by GES DISC - jimacker » Tue Nov 21, 2023 4:23 pm America/New_York


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 MERRA-2 does not. If the user is looking over land, there is a possibility that there is a difference. They can be close but there is no reason for them to be the same. For certain regions with little observations (eg Africa), there will be more uncertainty.
Please provide more information, with more description and coordinates on when and where you are comparing the data, so we can provide further assistance and insight.

Post Reply