Errors in MERRA-2 T2MWET (wet-bulb temperature)

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craymond859
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Errors in MERRA-2 T2MWET (wet-bulb temperature)

by craymond859 » Thu Jul 21, 2022 5:36 pm America/New_York

Has anyone investigated/used the 2-m hourly wet-bulb temperature product from MERRA-2? It seems to be almost exactly the same as the 2-m dewpoint temperature (differing by no more than 2 deg C). I was hoping to use this wet-bulb product off-the-shelf, but may have to calculate it from dry-bulb temperature & dewpoint instead.

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Re: Errors in MERRA-2 T2MWET (wet-bulb temperature)

by GES DISC - jimacker » Fri Jul 22, 2022 10:23 am America/New_York

Hello, we will forward your question to the MERRA-2 data specialists and may contact the MERRA-2 team as well.

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Re: Errors in MERRA-2 T2MWET (wet-bulb temperature)

by GES DISC - jimacker » Fri Jul 22, 2022 1:52 pm America/New_York

Hello. Our team has requested the name of the variable and data collection, and also a time period of interest and area that can be used to examine the data. If you have any plots you have made of the data, they would be useful as well (you can post them here).

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Re: Errors in MERRA-2 T2MWET (wet-bulb temperature)

by craymond859 » Wed Jul 27, 2022 10:27 am America/New_York

This was observed in data collection M2T1NXSLV, looking at the T2MWET variable. It is seemingly the case everywhere, for example it could be seen in July 2021 over the contiguous US.

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Re: Errors in MERRA-2 T2MWET (wet-bulb temperature)

by GES DISC - jimacker » Thu Jul 28, 2022 2:31 pm America/New_York

We have forwarded the information you provided to the MERRA-2 team for examination.

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