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Advancements in NPZD and CPD Modelling: Insights from Recent Collaborations

This document highlights the progress of the NPZD (Nutrient-Phytoplankton-Zooplankton-Detritus) and CPD (Copepod Predation Dynamics) models through a collaborative effort involving researchers like Davis, Chen, and others. It outlines the successful initiation of NPZD with climatological data, the completion of a full year run for NPZD (1995), and the testing of copepod data as part of the GLOBEC initiative. Additionally, it discusses model-data comparisons, nitrogen cycles, and climatic influences on the models, preparing for future integrations and collaborations.

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Advancements in NPZD and CPD Modelling: Insights from Recent Collaborations

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  1. Biological ModelsNPZD & CPDRubao JiCollaborators: Davis, Chen, Beardsley, Townsend, Durbin, Runge, Flagg, Tian, Qiao, Petrik

  2. Status • On-line coupling (off-line in future?) • Initiated NPZD with climatology (NP) • Completed 1995 whole year run for NPZD • Gathered copepod data (GLOBEC,MARMAP, ECOMON, AZMP) • Testing CPD model (Pseudocalanus), impletmented “stage with mean age” method, testing “EOF” method • Ready for NPZD run in other GLOBEC yrs

  3. Model structure

  4. Surface - Nitrogen

  5. Surface - Phytoplankton

  6. Transect - Nitrogen

  7. Transect - Phytoplankton

  8. Model-data comparison (1) Chl-a on the crest of GB (< 60m) in 1995. Data from E. Durbin

  9. Model-data comparison (2) Chl-a on NEP and SF in 1995. Data from E. Durbin

  10. Nitrogen cycle Redline from Pastsuzak et al., 1982

  11. CPD Initial Condition

  12. Day 30 E N C A

  13. Day 90

  14. NAO Slope Water NAO- Labrador Slope Water Intrusion Colder, Fresher Less Nutrient NAO+ Warm Slope Water Intrusion Warmer, More saline and Nutrient rich Drinkwater et al., 2003

  15. Climatological Condition (CC) Nitrogen Initial Condition Bottom Enriched Condition (BEC)

  16. CC VS BEC on GB CC BEC

  17. Flux comparison CC BEC

  18. CC VS BEC in JB CC BEC

  19. CC VS BEC in WB CC BEC

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