[ecco-support] [EXTERNAL] How to calculate Arctic Sea Ice Area in ECCOv4?

[Fenty, Ian G (US 329B)]

Ashfaq,

Hong is correct. Also, if you are using ecco v4r4 fields on the llc90 grid, the model geometry parameters are in this dataset:
https://podaac.jpl.nasa.gov/dataset/ECCO_L4_GEOMETRY_LLC0090GRID_V4R4
grid cell area is the field ‘rA’

If you are using ecco v4r4 fields on the 0.5-degree lat-lon grid, the model geometry parameters are in this dataset:
https://podaac.jpl.nasa.gov/dataset/ECCO_L4_GEOMETRY_05DEG_V4R4
grid cell area is the field ‘area’

-Ian

From: ecco-support <ecco-support-bounces at mit.edu> on behalf of Ahmed, Ashfaq <ashfaq_ahmed at brown.edu>
Date: Wednesday, April 2, 2025 at 2:04 PM
To: ECCO support list, wider membership <ecco-support at mit.edu>
Subject: [EXTERNAL] [ecco-support] How to calculate Arctic Sea Ice Area in ECCOv4?
Hi, ECCO team,

I hope you guys are having a wonderful time.

I am writing this email to solve a problem that I am facing as I am trying to plot the Arctic sea ice area in km^2. We know that the area = sea ice conc. * grid size. However, the grid size in the Arctic cap is variable.

Can anyone please tell me how can I calculate the Arctic tile's sea ice area, considering the grid variability in mind?

[Image removed by sender. Many thank to Brown University for sponsoring our 50th Anniversary celebration]
Thanks,
Ashfaq Ahmed (he/his)
Doctoral Candidate,
Center for Fluids and Thermal Science<https://urldefense.us/v3/__https:/engineering.brown.edu/people/graduate-students/phd-students/phd-students-fluids-and-thermal-sciences__;!!PvBDto6Hs4WbVuu7!MSs-70m9dSQKveYwcsbYL5AineuKFFejkjQSonKXQIcBy4JKmjaG4c5wA1OfBH88atAbdTQxz-1dNhL2skaK85QEC2pA7w$>
School of Engineering, Brown University
Email: ashfaq_ahmed at brown.edu<mailto:ramisa_fariha at brown.edu>
Profile Links:
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Providence, Rhode Island, USA

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