MUR-L4 SST: Persistent Striping Artifacts near the Brazil Current

[yuzuru]

I observe strong horizontal striping artifacts in MUR_L4 SST and SST gradient fields near the Brazil Current (approx. 12°S–28°S, 27°W–42°W). The striping appears almost daily. And these areas are flagged as quality level = 1 (good data).

I would like to know why these striping artifacts occur. Is this a known issue in the MUR_L4 product, and can it be technically mitigated or corrected in future versions?

Attached is an example (2010-09-23).

https://worldview.earthdata.nasa.gov/?v=-78.64821285045814,-42.40743885885213,-12.516134871357451,-9.858056728513507&l=Coastlines_15m,GHRSST_L4_MUR_Sea_Surface_Temperature&lg=false&t=2024-02-03-T08%3A06%3A25Z

[yuzuru]

Correct: 1 represents the open-sea, instead of meaning good data

[miawang]

Hi all, I can confirm a similar issue in MUR_L4 SST: the gradient maps show oblique, along-track banded/striping artifacts that appear non-physical. What’s notable in my case is that the collocated MODIS swath SST for the same day does not show these stripes, suggesting the pattern is unlikely to be a real oceanic front.

I have observed this on multiple dates/regions as well, and I’m attaching:
the MUR_L4 SST image showing the stripes, and the corresponding MODIS SST for the same date/time window, where the stripes are absent.