Can Pseudo-nitzschia blooms be modeled by coastal upwelling in Lisbon Bay?

Palma, S.; Mouriño, Helena; Silva, Alexandra; Barão, Maria Isabel; Moita, Maria Teresa

doi:10.1016/j.hal.2009.11.006

Cited by 42 publications

(44 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…HABs are a common occurrence in Portuguese water, both along the coast and offshore (Moita et al, 2003;Vale, 2012;Escalera et al, 2010;Palma et al, 2010). An ocean colouring technique applied to remote-sensing imagery can be used to track these blooms, but this technique is also limited for low-biomass or in subsurface blooms, and it lacks the predictive skills to infer bloom transport beforehand.…”

Section: Marine Resourcesmentioning

confidence: 99%

An operational model for the West Iberian coast: products and services

Mateus¹,

Riflet²,

Chambel

et al. 2012

Ocean Sci.

View full text Add to dashboard Cite

Abstract. This paper presents the structure and application of a regional scale operational modelling tool for the West Iberian coast, and discusses its potential for products and services for both scientific and coastal management activities. The forecasting suite includes nested hydrodynamic models forced with up-to-date meteorological forecast data and large-scale model results. The present status of the system and its recent upgrades are reviewed, offering a general description of the main components of the system: the forcing data, the circulation model, the model outputs and the validation methodology of model results. Seasonal differences in temperature, salinity and current velocity fields are illustrated and show satisfactory reproduction of the top and deep layer thermodynamics. The system provides boundary forcing for a number of local-scale model applications via downscaling of the solution and enables potential products and services from which civil society will benefit.

show abstract

Section: Marine Resourcesmentioning

confidence: 99%

An operational model for the West Iberian coast: products and services

Mateus¹,

Riflet²,

Chambel

et al. 2012

Ocean Sci.

View full text Add to dashboard Cite

show abstract

“…Chlorophyll a (Chl-a) and silicic acid were used as predictors, but significant refinement to the models was achieved by period-specific inclusions of temperature, an upwelling index, river discharge, or nitrate data. Palma et al (2010) also achieved some success in the prediction of Pseudo-nitzschia blooms in Lisbon Bay using statistical models in the application of regression analysis to the relationship of Pseudo-nitzschia blooms to sea surface temperature and an upwelling index. Models developed for three oceanographic seasons allowed forecasting of the presence of Pseudo-nitzschia in spring and summer, revealing a lag of four to six days between upwelling events and the appearance of Pseudo-nitzschia blooms.…”

Section: Hab Prediction and Response To Climate Changementioning

confidence: 99%

Harmful Algal Blooms in Eastern Boundary Upwelling Systems: A GEOHAB Core Research Project

Pitcher¹,

Jiménez²,

Kudela³

et al. 2017

Oceanog.

View full text Add to dashboard Cite

“…Moreover, upwelling occurs as filaments with diverse orientations [Relvas and Barton (2002)], thus, it is not guaranteed that the Sagres study site is always significantly affected by these filaments, even though they are present in the surrounding area. To prove a direct relationship between SST and upwelling indices over the duration of a long time series is difficult, but analyses of isolated events at a specific study site demonstrate more clearly the effects of wind forcing on SST [Goela et al (2015), Loureiro et al (2005), Palma et al (2010)]. From this base, a time window of interest was defined, coinciding with a major sampling campaign period for ocean colour remote sensing validation purposes, and Q x , Q y and SST were plotted (Fig.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Palma et al (2010)]. Spectral analysis is a frequency domain statistical method, useful to unmask hidden time frequency in the data.…”

mentioning

confidence: 99%

Time series analysis of data for sea surface temperature and upwelling components from the southwest coast of Portugal

Goela

Cordeiro

Danchenko

et al. 2016

Journal of Marine Systems

View full text Add to dashboard Cite

Time series analysis of data for sea surface temperature and upwelling components from the southwest coast of AbstractThis study relates sea surface temperature (SST) to the upwelling conditions off the southwest coast of Portugal using statistical analyses of publically available data.Optimum Interpolation (OI) daily SST data were extracted from the United States (US) National Oceanic and Atmospheric Administration (NOAA) and data for wind speed and direction were from the US National Climatic Data Center. Time series were extracted at a daily frequency for a time horizon of 26 years. Upwelling indices were estimated using westerly (Q x ) and southerly (Q y ) Ekman transport components.In the first part of the study, time series were inspected for trend and seasonality over the whole period. The seasonally adjusted time series revealed an increasing slope for SST (0.15ºC per decade) and decreasing slopes for Q x (-84.01 m 3 .s -1 .km -1 per decade) and Q y (-25.20 m 3 .s -1 .km -1 per decade), over the time horizon. Structural breaks analysis applied to the time series showed that a statistically significant incremental increase in SST was more pronounced during the last decade. Cross-correlation between upwelling indices and SST revealed a time delay of 5 and 2 days between Q x and SST, and between Q y and SST, respectively. A spectral analysis combined with the previous analysis enabled the identification of four oceanographic seasons. Those seasons were later recognised over a restricted time period of 4 years, between 2008 and 2012; when there was an extensive sampling programme for the validation of ocean colour remote sensing imagery. The seasons were defined as: summer, with intense and regular events of upwelling; autumn, indicating relaxation of upwelling conditions; and spring and winter, showing high interannual variability in terms of number and intensity of upwelling events.

show abstract

Can Pseudo-nitzschia blooms be modeled by coastal upwelling in Lisbon Bay?

Cited by 42 publications

References 33 publications

An operational model for the West Iberian coast: products and services

An operational model for the West Iberian coast: products and services

Harmful Algal Blooms in Eastern Boundary Upwelling Systems: A GEOHAB Core Research Project

Time series analysis of data for sea surface temperature and upwelling components from the southwest coast of Portugal

Contact Info

Product

Resources

About