Comparison of new and primary production models using SeaWiFS data in contrasting hydrographic zones of the northern North Atlantic

Gavin Tilstone, Benjamin Taylor, David Blondeau-Patissier, Tim Powell, Steve Groom, Andrew Rees, Mike Lucas

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    The accuracy of two satellite models of marine primary (PP) and new production (NP) were assessed against 14C and 15N uptake measurements taken during six research cruises in the northern North Atlantic. The wavelength resolving model (WRM) was more accurate than the Vertical General Production Model (VGPM) for computation of both PP and NP. Mean monthly satellite maps of PP and NP for both models were generated from 1997 to 2010 using SeaWiFS data for the Irminger basin and North Atlantic. Intra- and inter-annual variability of the two models was compared in six hydrographic zones. Both models exhibited similar spatio-temporal patterns: PP and NP increased from April to June and decreased by August. Higher values were associated with the East Greenland Current (EGC), Iceland Basin (ICB) and the Reykjanes Ridge (RKR) and lower values occurred in the Central Irminger Current (CIC), North Irminger Current (NIC) and Southern Irminger Current (SIC). The annual PP and NP over the SeaWiFS record was 258 and 82 gC m− 2 yr− 1 respectively for the VGPM and 190 and 41 gC m− 2 yr− 1 for the WRM. Average annual cumulative sum in the anomalies of NP for the VGPM were positively correlated with the North Atlantic Oscillation (NAO) in the EGC, CIC and SIC and negatively correlated with the multivariate ENSO index (MEI) in the ICB. By contrast, cumulative sum of the anomalies of NP for the WRM were significantly correlated with NAO only in the EGC and CIC. NP from both VGPM and WRM exhibited significant negative correlations with Arctic Oscillation (AO) in all hydrographic zones. The differences in estimates of PP and NP in these hydrographic zones arise principally from the parameterisation of the euphotic depth and the SST dependence of photo-physiological term in the VGPM, which has a greater sensitivity to variations in temperature than the WRM. In waters of 0 to 5 °C PP using the VGPM was 43% higher than WRM, from 5 to 10 °C the VGPM was 29% higher and from 10 to 15 °C the VGPM was 27% higher.
    Original languageEnglish
    Pages (from-to)473-489
    Number of pages17
    JournalRemote Sensing of Environment
    Volume156
    DOIs
    Publication statusPublished - 2015

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    SeaWiFS
    primary production
    wavelengths
    wavelength
    Wavelength
    Greenland
    comparison
    Iceland
    basins
    North Atlantic Oscillation
    basin
    Satellites
    anomaly
    Arctic Oscillation

    Cite this

    Tilstone, Gavin ; Taylor, Benjamin ; Blondeau-Patissier, David ; Powell, Tim ; Groom, Steve ; Rees, Andrew ; Lucas, Mike. / Comparison of new and primary production models using SeaWiFS data in contrasting hydrographic zones of the northern North Atlantic. In: Remote Sensing of Environment. 2015 ; Vol. 156. pp. 473-489.
    @article{26286bb9c1784507a31f77b63e073da1,
    title = "Comparison of new and primary production models using SeaWiFS data in contrasting hydrographic zones of the northern North Atlantic",
    abstract = "The accuracy of two satellite models of marine primary (PP) and new production (NP) were assessed against 14C and 15N uptake measurements taken during six research cruises in the northern North Atlantic. The wavelength resolving model (WRM) was more accurate than the Vertical General Production Model (VGPM) for computation of both PP and NP. Mean monthly satellite maps of PP and NP for both models were generated from 1997 to 2010 using SeaWiFS data for the Irminger basin and North Atlantic. Intra- and inter-annual variability of the two models was compared in six hydrographic zones. Both models exhibited similar spatio-temporal patterns: PP and NP increased from April to June and decreased by August. Higher values were associated with the East Greenland Current (EGC), Iceland Basin (ICB) and the Reykjanes Ridge (RKR) and lower values occurred in the Central Irminger Current (CIC), North Irminger Current (NIC) and Southern Irminger Current (SIC). The annual PP and NP over the SeaWiFS record was 258 and 82 gC m− 2 yr− 1 respectively for the VGPM and 190 and 41 gC m− 2 yr− 1 for the WRM. Average annual cumulative sum in the anomalies of NP for the VGPM were positively correlated with the North Atlantic Oscillation (NAO) in the EGC, CIC and SIC and negatively correlated with the multivariate ENSO index (MEI) in the ICB. By contrast, cumulative sum of the anomalies of NP for the WRM were significantly correlated with NAO only in the EGC and CIC. NP from both VGPM and WRM exhibited significant negative correlations with Arctic Oscillation (AO) in all hydrographic zones. The differences in estimates of PP and NP in these hydrographic zones arise principally from the parameterisation of the euphotic depth and the SST dependence of photo-physiological term in the VGPM, which has a greater sensitivity to variations in temperature than the WRM. In waters of 0 to 5 °C PP using the VGPM was 43{\%} higher than WRM, from 5 to 10 °C the VGPM was 29{\%} higher and from 10 to 15 °C the VGPM was 27{\%} higher.",
    keywords = "Atmospheric pressure, Band structure, Climatology, Phytoplankton, Sensitivity analysis, Arctic Oscillation, New production, North Atlantic, North Atlantic oscillations, Ocean-colour, Primary production, Oceanography, accuracy assessment, annual variation, El Nino-Southern Oscillation, hydrography, isotopic analysis, North Atlantic Oscillation, ocean color, phytoplankton, primary production, satellite data, SeaWiFS, spatiotemporal analysis, Arctic Ocean, Atlantic Ocean, East Greenland Current, Iceland Basin, Irminger Sea, Reykjanes Ridge",
    author = "Gavin Tilstone and Benjamin Taylor and David Blondeau-Patissier and Tim Powell and Steve Groom and Andrew Rees and Mike Lucas",
    year = "2015",
    doi = "10.1016/j.rse.2014.10.013",
    language = "English",
    volume = "156",
    pages = "473--489",
    journal = "Remote Sensing of Environment",
    issn = "0034-4257",
    publisher = "Elsevier",

    }

    Comparison of new and primary production models using SeaWiFS data in contrasting hydrographic zones of the northern North Atlantic. / Tilstone, Gavin; Taylor, Benjamin; Blondeau-Patissier, David; Powell, Tim; Groom, Steve; Rees, Andrew; Lucas, Mike.

    In: Remote Sensing of Environment, Vol. 156, 2015, p. 473-489.

    Research output: Contribution to journalArticleResearchpeer-review

    TY - JOUR

    T1 - Comparison of new and primary production models using SeaWiFS data in contrasting hydrographic zones of the northern North Atlantic

    AU - Tilstone, Gavin

    AU - Taylor, Benjamin

    AU - Blondeau-Patissier, David

    AU - Powell, Tim

    AU - Groom, Steve

    AU - Rees, Andrew

    AU - Lucas, Mike

    PY - 2015

    Y1 - 2015

    N2 - The accuracy of two satellite models of marine primary (PP) and new production (NP) were assessed against 14C and 15N uptake measurements taken during six research cruises in the northern North Atlantic. The wavelength resolving model (WRM) was more accurate than the Vertical General Production Model (VGPM) for computation of both PP and NP. Mean monthly satellite maps of PP and NP for both models were generated from 1997 to 2010 using SeaWiFS data for the Irminger basin and North Atlantic. Intra- and inter-annual variability of the two models was compared in six hydrographic zones. Both models exhibited similar spatio-temporal patterns: PP and NP increased from April to June and decreased by August. Higher values were associated with the East Greenland Current (EGC), Iceland Basin (ICB) and the Reykjanes Ridge (RKR) and lower values occurred in the Central Irminger Current (CIC), North Irminger Current (NIC) and Southern Irminger Current (SIC). The annual PP and NP over the SeaWiFS record was 258 and 82 gC m− 2 yr− 1 respectively for the VGPM and 190 and 41 gC m− 2 yr− 1 for the WRM. Average annual cumulative sum in the anomalies of NP for the VGPM were positively correlated with the North Atlantic Oscillation (NAO) in the EGC, CIC and SIC and negatively correlated with the multivariate ENSO index (MEI) in the ICB. By contrast, cumulative sum of the anomalies of NP for the WRM were significantly correlated with NAO only in the EGC and CIC. NP from both VGPM and WRM exhibited significant negative correlations with Arctic Oscillation (AO) in all hydrographic zones. The differences in estimates of PP and NP in these hydrographic zones arise principally from the parameterisation of the euphotic depth and the SST dependence of photo-physiological term in the VGPM, which has a greater sensitivity to variations in temperature than the WRM. In waters of 0 to 5 °C PP using the VGPM was 43% higher than WRM, from 5 to 10 °C the VGPM was 29% higher and from 10 to 15 °C the VGPM was 27% higher.

    AB - The accuracy of two satellite models of marine primary (PP) and new production (NP) were assessed against 14C and 15N uptake measurements taken during six research cruises in the northern North Atlantic. The wavelength resolving model (WRM) was more accurate than the Vertical General Production Model (VGPM) for computation of both PP and NP. Mean monthly satellite maps of PP and NP for both models were generated from 1997 to 2010 using SeaWiFS data for the Irminger basin and North Atlantic. Intra- and inter-annual variability of the two models was compared in six hydrographic zones. Both models exhibited similar spatio-temporal patterns: PP and NP increased from April to June and decreased by August. Higher values were associated with the East Greenland Current (EGC), Iceland Basin (ICB) and the Reykjanes Ridge (RKR) and lower values occurred in the Central Irminger Current (CIC), North Irminger Current (NIC) and Southern Irminger Current (SIC). The annual PP and NP over the SeaWiFS record was 258 and 82 gC m− 2 yr− 1 respectively for the VGPM and 190 and 41 gC m− 2 yr− 1 for the WRM. Average annual cumulative sum in the anomalies of NP for the VGPM were positively correlated with the North Atlantic Oscillation (NAO) in the EGC, CIC and SIC and negatively correlated with the multivariate ENSO index (MEI) in the ICB. By contrast, cumulative sum of the anomalies of NP for the WRM were significantly correlated with NAO only in the EGC and CIC. NP from both VGPM and WRM exhibited significant negative correlations with Arctic Oscillation (AO) in all hydrographic zones. The differences in estimates of PP and NP in these hydrographic zones arise principally from the parameterisation of the euphotic depth and the SST dependence of photo-physiological term in the VGPM, which has a greater sensitivity to variations in temperature than the WRM. In waters of 0 to 5 °C PP using the VGPM was 43% higher than WRM, from 5 to 10 °C the VGPM was 29% higher and from 10 to 15 °C the VGPM was 27% higher.

    KW - Atmospheric pressure

    KW - Band structure

    KW - Climatology

    KW - Phytoplankton

    KW - Sensitivity analysis

    KW - Arctic Oscillation

    KW - New production

    KW - North Atlantic

    KW - North Atlantic oscillations

    KW - Ocean-colour

    KW - Primary production

    KW - Oceanography

    KW - accuracy assessment

    KW - annual variation

    KW - El Nino-Southern Oscillation

    KW - hydrography

    KW - isotopic analysis

    KW - North Atlantic Oscillation

    KW - ocean color

    KW - phytoplankton

    KW - primary production

    KW - satellite data

    KW - SeaWiFS

    KW - spatiotemporal analysis

    KW - Arctic Ocean

    KW - Atlantic Ocean

    KW - East Greenland Current

    KW - Iceland Basin

    KW - Irminger Sea

    KW - Reykjanes Ridge

    U2 - 10.1016/j.rse.2014.10.013

    DO - 10.1016/j.rse.2014.10.013

    M3 - Article

    VL - 156

    SP - 473

    EP - 489

    JO - Remote Sensing of Environment

    JF - Remote Sensing of Environment

    SN - 0034-4257

    ER -