Diva Workshop – 27-30 January 2020

Short URL: 🔗 https://tinyurl.com/DIVA2020

Links to the presentations

Romain Escudier: In-situ data quality control and preprocessing challenge (pdf)

Nadia Pinardi: A non-linear quality control procedure for climatology estimation: ARGO data and Pacific Western Boundary current regions (ppt) (pdf)

Simona Simoncelli:

• Consistency analysis of DIVAnd output with reference products (pdf)
• Multi Year Products and Ocean Monitoring Indicators: overview for products consistency analysis and new data products generation (pdf)

General information

Dates

From Monday 27 January (1.30 PM) to Thursday 30 January (5 PM), 2020.
The Product Meeting will take place on Thursday between 3 and 5 PM.

Venue

📍 The 2020 edition will be hosted by the University of Bologna, Department of Physics and Astronomy, Viale Berti Pichat 6/2, 40127 Bologna, 2nd floor Classroom “Biomedica”. 🔗 How to reach us?

Participants

Participants are expected to be partners of SeaDataCloud or EMODnet Chemistry, Biology or Physics lots. Other scientists or data managers may request an invitation by contacting the organisers.

Registration

📧 The registration period is now closed and the accepted participants have been notified by email.

Accommodations

Bologna is a very busy town and we recommend you book at the hotel before the end of 2019.
🔗 List of hotels.

Preliminary program

The workshop will be focused on DIVAnd (n-dimensional interpolation).

Monday (1/2 day)

📍 Meeting point: Department of Physics and Astronomy, Viale Berti Pichat 6/2, Bologna at 1:00 PM.
🕒 Meeting start: 1.30 PM

The group will be split into 2 groups: beginners and advanced users.

• Checking of installations
• Beginners:
  • (Possibly continuation of checking of installation)
  • Introduction to Objective Analysis, Optimal Interpolation, and Variational Objective Analysis (Alexander Barth)
  • Basic Julia commands and major differences with MATLAB and Python (Alexander Barth)
• Advanced users:
  • Multi Year Products and Ocean Monitoring Indicators: an overview for products consistency analysis and new data products generation (Simona Simoncelli)
  • New data products: how to use DIVAnd to produce sliding decades and derived information (Charles Troupin)

Tuesday

• Introduction to Jupyter Notebooks (Charles Troupin)
• Data import and data downloading (Charles Troupin)
• Preparation of topography (Alexander Barth)
• Estimate the noise-to-signal ratio (Jean-Marie Beckers)

🍽️ Social dinner

Wednesday

• Definition of the background field (Charles Troupin)
• Parameter optimization: horizontal and vertical correlation lengths (Alexander Barth)
• Computation of the error field (Jean-Marie Beckers)
• Advection constraint: (Alexander Barth)

Thursday

• In-situ data quality control and preprocessing challenge: an illustration for the CMEMS Mediterranean reanalysis at CMCC (Romain Escudier)
• From data integration to DIVAnd: how to harmonize the work-flow (Charles Troupin)
• Use of residuals to discard non-representative data in the climatology (Jean-Marie Beckers)

• Concluding remarks on consistency analysis of DIVAnd output with reference products (Simona Simoncelli)
  🕒 Meeting closure: 3 PM.

• Follow-up meeting for SeaDataCloud partners: WP11 meeting on the new products (SeaDataCloud partners)

Preparation

Computers

Participants will have with them a laptop with:

• 16 GB RAM memory and
• sufficient free disk space (approx. 50 GB).
• Data files necessary for the preparation of a climatology.

More computing resources might be necessary depending on the resolution and size of the studied domain.

You may also need to check the list of acronyms and definitions.

Workshop material

The notebooks are available in the folder notebooks in the zip file. Follow the instructions here to download and open the notebook files.

Installation

Please install the following software beforehand:

• Julia language
• IJulia, the Julia kernel for Jupyter.
• PyPlot, the interface to use matplotlib.pyplot.
• OceanDataView, to pre-process the data files.
• Follow the steps described here: installation.

Please make sure to install all these software early enough before the workshop. If you have an issue, you can contact us by mail about 1 week before the workshop and we will try to help you via mail.

Before the workshop…

✅ If you plan to use your own dataset, please verify that it has been quality-controlled.

✅ If your institution is part of eduroam, be sure to have your credentials for the wifi connexion.

✅ Register at Marine ID and bring your username and password (in order to access the Virtual Research Environment).

Useful references

A list of publications about DIVA, Optimal Interpolation, Splines… is available here.