Qualitative analysis of ESA's freeboard observations

[guillaumevernieres]

Description

Investigate the quality of the retrieval compared to other estimates. For example, compare to:

• NESDIS
• ICESat-2
• CryoSat-2 from other centers
• ...

[mjhossen]

The following things I will do:

• Plot ESA ice freeboard for July to October 2021
• Compare this with NESDIS, ICESAT-2 and CryoSat2 (as mentioned above)

[mjhossen]

@guillaumevernieres and @ShastriPaturi I have completed the superobing of sea-ice freeboard of ESA. But the length is different for different days. That's why, I got an error message while calculating the mean/max for a month of data. The data is located in the folder: /work2/noaa/ng-godas/jhossen/icefb_cryosat_esa/superob/2021/

[mjhossen]

Here is the plot of ICESat-2 (monthly) and IceBridge (daily). They are very different.

[guillaumevernieres]

@mjhossen : Your icebridge plot does not look right, the icebridge data are quite sparse, just a few aircraft tracks. Where are the obs coming from and what did you do to create the figure?

[mjhossen]

@guillaumevernieres Thank you for finding the error. This is actually CryoSat-2 (Level-4 Sea Ice Elevation, Freeboard, and Thickness V001) available from 20 Sep 2010. I recheck the source. The fact is the IceBridge data is only available until 25 April, 2013. So, I cannot use it for the comparison.

[mjhossen]

Here is the ESA ice freeboard (2021-10) monthly mean. The ESA is not comparable to IceSat-2 in the sense that freeboard height is much higher than the ESA. However, it looks like ESA is comparable to CryoSat-2.

[mjhossen]

[ShastriPaturi]

Thanks @mjhossen. How are these comparable to ICESat-2 or other ice freeboard products?

[mjhossen]

@guillaumevernieres I have submitted a report on this issue. We can close it.