Preprints
https://doi.org/10.5194/essd-2023-244
https://doi.org/10.5194/essd-2023-244
29 Jun 2023
 | 29 Jun 2023
Status: a revised version of this preprint was accepted for the journal ESSD and is expected to appear here in due course.

A new global oceanic multi-model net primary productivity data product

Thomas James Ryan-Keogh, Sandy Jane Thomalla, Nicolette Chang, and Tumelo Moalusi

Abstract. Net primary production of the oceans contributes approximately half of the total global net primary production and long-term observational records are required to assess any climate driven changes. The Ocean Colour Climate Change Initiative (OC-CCI) has proven to be robust, whilst also being one of the longest records of ocean colour. However, to date only one primary production algorithm has been applied to this data product with other algorithms typically applied to single sensor missions. The data product presented here addresses this issue by applying five algorithms to the OC-CCI data product, which allows the user to interrogate the range of distribution across multiple models and to identify consensus or outliers for their specific region of interest. Outputs are compared to single sensor data missions highlighting good overall global agreement, with some small regional discrepancies. Inter-model assessments address the source of these discrepancies, highlighting the choice of the mixed layer data product as a vital component for accurate primary production estimates.

Thomas James Ryan-Keogh et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-244', Anonymous Referee #1, 21 Jul 2023
  • RC2: 'Comment on essd-2023-244', Toby Westberry, 10 Aug 2023
  • AC1: 'Comment on essd-2023-244', Thomas Ryan-Keogh, 08 Sep 2023

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on essd-2023-244', Anonymous Referee #1, 21 Jul 2023
  • RC2: 'Comment on essd-2023-244', Toby Westberry, 10 Aug 2023
  • AC1: 'Comment on essd-2023-244', Thomas Ryan-Keogh, 08 Sep 2023

Thomas James Ryan-Keogh et al.

Thomas James Ryan-Keogh et al.

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Short summary
Oceanic productivity has been highlighted as an important environmental indicator of climate change in comparison to other existing metrics. However, the availability of this data to assess trends and trajectories is plagued with issues, such as application to only a single satellite reducing the time period for assessment. We have applied multiple algorithms to the longest ocean colour record to provide a record for assessing climate change driven trends.