[ecco-support] [EXTERNAL] Data for ocean current

[Ahmed, Ashfaq]

Dear Dr. Ou,

Thank you for sharing the data summary—it was very helpful! I’m currently
looking for a time series dataset of Arctic Ocean surface currents
(preferably, spanning multiple years). As I was analyzing Arctic
near-surface kinematics in ECCOv4r4, I observed that the sea ice drift
appears to be faster than in some observational records. To better
understand this bias, I’m now comparing ECCOv4r4’s ocean surface velocity
with observational datasets.

My hypothesis is that if the modeled ocean currents are also stronger than
observed, it could suggest that wind momentum flux is overly influential in
the model. On the other hand, if ECCOv4r4 currents are weaker than
observations, it may indicate the presence of compensating processes or
parameters that are moderating the wind drag.

I’ve already calculated the near-surface kinetic energy and compared it
with in situ observations from von Appen et al. (2024). Initial results
suggest that ECCOv4r4 underestimates the ocean kinetic energy.

[image: ocean_current_comparison.png]

I would greatly appreciate any recommendations or insights you might have
regarding suitable datasets or relevant approaches for this comparison. I’m
also cc’ing Dr. Ian here in case he has any suggestions to add.


Best,
_________________
*Ashfaq Ahmed*
Ph.D. Candidate
Center for Fluid Mechanics
Brown University
Providence, Rhode Island, USA 02912
website: ahmedashfaq.com


On Wed, May 28, 2025 at 11:41 AM Wang, Ou (US 329B) <ou.wang at jpl.nasa.gov>
wrote:

> Hi Ashfaq,
>
>
>
> The ECCO V4r4 synopsis (https://zenodo.org/records/4533349) has the list
> of observations used to constrain V4r4.
>
>
>
> Best,
>
> Ou
>
>
>
> *From: *ecco-support <ecco-support-bounces at mit.edu> on behalf of Ahmed,
> Ashfaq <ashfaq_ahmed at brown.edu>
> *Date: *Wednesday, May 28, 2025 at 8:12 AM
> *To: *ECCO support list, wider membership <ecco-support at mit.edu>
> *Subject: *[EXTERNAL] [ecco-support] Data for ocean current
>
> Hi all!
>
>
>
> I have a quick question. I wanted to look for which data was assimilated
> in ECCOv4r4 to produce the ocean velocity
> <https://podaac.jpl.nasa.gov/dataset/ECCO_L4_OCEAN_VEL_LLC0090GRID_DAILY_V4R4>
> (UVEL, VVEL, WVEL). For example, the list of Argo, CTD, XBT, ITP, etc. Can
> anyone please tell me?
>
>
>
> It will be a great help. Thank you so much!
>
>
>
> [image: 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!O-w96S37k1Y7WYeR5xgtJh3Y429RjWbBRO9-uhh2P6kYvwEaT3u_r_8wjqSNFZrKgqIkBbZe5nTHmIN5JfFZXt0045jG$>
>
> School of Engineering, Brown University
>
> Email: ashfaq_ahmed at brown.edu <ramisa_fariha at brown.edu>
>
> *Profile Links:*
>
> *LinkedIn
> <https://urldefense.us/v3/__https:/www.linkedin.com/in/ashfaqahmed40/__;!!PvBDto6Hs4WbVuu7!O-w96S37k1Y7WYeR5xgtJh3Y429RjWbBRO9-uhh2P6kYvwEaT3u_r_8wjqSNFZrKgqIkBbZe5nTHmIN5JfFZXmzwDwXt$> | Website
> <https://urldefense.us/v3/__https:/ahmedashfaq.com/__;!!PvBDto6Hs4WbVuu7!O-w96S37k1Y7WYeR5xgtJh3Y429RjWbBRO9-uhh2P6kYvwEaT3u_r_8wjqSNFZrKgqIkBbZe5nTHmIN5JfFZXgDiNI6H$> | Google
> Scholar
> <https://urldefense.us/v3/__https:/scholar.google.com/citations?user=iiSUYgsAAAAJ&hl=en&authuser=1__;!!PvBDto6Hs4WbVuu7!O-w96S37k1Y7WYeR5xgtJh3Y429RjWbBRO9-uhh2P6kYvwEaT3u_r_8wjqSNFZrKgqIkBbZe5nTHmIN5JfFZXlDBtsf8$> | ResearchGate
> <https://urldefense.us/v3/__https:/www.researchgate.net/profile/Ashfaq-Ahmed-15__;!!PvBDto6Hs4WbVuu7!O-w96S37k1Y7WYeR5xgtJh3Y429RjWbBRO9-uhh2P6kYvwEaT3u_r_8wjqSNFZrKgqIkBbZe5nTHmIN5JfFZXgZmBG_S$>*
>
> Providence, Rhode Island, USA
>
>
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