Remotely-sensed L4 SST underestimates the thermal fingerprint of coastal upwelling

Meneghesso, Claudia; Seabra, Rui; Broitman, Bernardo R.; Wethey, David S.; Burrows, Michael T.; Chan, Benny K. K.; Guy‐Haim, Tamar; Ribeiro, Pedro A.; Rilov, Gil; Santos, António M.; Sousa, Lara L.; Lima, Fernando P.

doi:10.1016/j.rse.2019.111588

Cited by 42 publications

(29 citation statements)

References 49 publications

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“…SST data should arguably be more effective as these indicate presence of cold water of deep origin on the sea's surface. However, until recently, SST data were limited in several regards concerning data quality and quantity [32][33][34].…”

Section: Introductionmentioning

confidence: 99%

“…Over the past decade, techniques have been developed to allow the assimilation and blending of different SST datasets from various in situ and satellite platforms. These are referred to as the Level-3 and Level-4 high resolution products, with the Level-4 data being gap-free [34], and are being widely applied in studies of coastal areas [48][49][50][51]. Previous studies demonstrated that satellite-based SST data are less accurate than in situ data due to the complexity of the oceanic and atmospheric conditions that need to be accounted for in deriving satellite SST products [52][53][54][55][56] and such errors vary both regionally and temporally [57].…”

Section: Introductionmentioning

confidence: 99%

“…However, in comparison to in situ temperature measurements collected from ships or buoys, a major advantage of satellite SST is their global coverage and near real time availability. SST datasets with a high level of accuracy, spatial consistency and completeness, and fine-scale resolution are necessary for weather and climate forecasting and are of great importance for reliable climate change monitoring [9,12,17,34,45,51,[58][59][60][61].…”

Section: Introductionmentioning

confidence: 99%

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A novel approach to quantify metrics of upwelling intensity, frequency, and duration

2021

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The importance of coastal upwelling systems is widely recognized. However, several aspects of the current and future behaviors of these systems remain uncertain. Fluctuations in temperature because of anthropogenic climate change are hypothesized to affect upwelling-favorable winds and coastal upwelling is expected to intensify across all Eastern Boundary Upwelling Systems. To better understand how upwelling may change in the future, it is necessary to develop a more rigorous method of quantifying this phenomenon. In this paper, we use SST data and wind data in a novel method of detecting upwelling signals and quantifying metrics of upwelling intensity, duration, and frequency at four sites within the Benguela Upwelling System. We found that indicators of upwelling are uniformly detected across five SST products for each of the four sites and that the duration of those signals is longer in SST products with higher spatial resolutions. Moreover, the high-resolution SST products are significantly more likely to display upwelling signals at 25 km away from the coast when signals were also detected at the coast. Our findings promote the viability of using SST and wind time series data to detect upwelling signals within coastal upwelling systems. We highlight the importance of high-resolution data products to improve the reliability of such estimates. This study represents an important step towards the development of an objective method for describing the behavior of coastal upwelling systems.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A novel approach to quantify metrics of upwelling intensity, frequency, and duration

2021

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“…As discussed before, previous studies in this system showed that under persistent upwelling conditions the role of the herbivore guild could be reduced by either high algal growth rate or an increase in consumer‐resistant algal cover, and thus convergence in algal abundance between herbivore present versus absent condition may be expected (Nielsen and Navarrete 2004). At the range overlap site (Punta Talca) coastal upwelling is intense (Tapia et al 2009) compared with the southern (Las Cruces) and northern site (Carrizal Bajo), which are either sheltered or under weak, semipermanent upwelling, respectively (Tapia et al 2009, Meneghesso et al 2020). Differences in community composition recorded inside exclusion, herbivore‐free, areas at our experimental sites (see Appendix : Fig.…”

Section: Discussionmentioning

confidence: 99%

Novel co‐occurrence of functionally redundant consumers induced by range expansion alters community structure

Aguilera

Valdivia

Broitman

et al. 2020

Ecology

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Ongoing climate change is shifting the geographic distributions of some species, potentially imposing rapid changes in local community structure and ecosystem functioning. Besides changes in population‐level interspecific interactions, such range shifts may also cause changes in functional structure within the host assemblages, which can result in losses or gains in ecosystem functions. Because consumer‐resource dynamics are central to community regulation, functional reorganization driven by introduction of new consumer species can have large consequences on ecosystem functions. Here we experimentally examine the extent to which the recent poleward range expansion of the intertidal grazer limpet Scurria viridula along the coast of Chile has altered the role of the resident congeneric limpet S. zebrina, and whether the net collective impacts, and functional structure, of the entire herbivore guild have been modified by the introduction of this new member. We examined the functional role of Scurria species in controlling ephemeral algal cover, bare rock availability, and species richness and diversity, and compared the effects in the region of range overlap against their respective “native” abutted ranges. Experiments showed depression of per capita effects of the range‐expanded species within the region of overlap, suggesting environmental conditions negatively affect individual performance. In contrast, effects of S. zebrina were commonly invariant at its range edge. When comparing single species versus polycultures, effects on bare rock cover were altered by the presence of the other Scurria species, suggesting competition between Scurria species. Importantly, although the magnitude of S. viridula effects at the range overlap was reduced, its addition to the herbivore guild seems to complement and intensify the role of the guild in reducing green algal cover, species richness and increasing bare space provision. Our study thus highlights that range expansion of an herbivore can modify the functional guild structure in the recipient community. It also highlights the complexity of predicting how functional structure may change in the face of natural or human‐induced range expansions. There is a need for more field‐based examination of regional functional compensation, complementarity, or inhibition before we can construct a conceptual framework to anticipate the consequences of species range expansions.

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“…Este comportamiento es característico de lo que ocurre en eventos de surgencia, evidenciados en esta región a través de mediciones durante campañas oceanográficas (Pimenta, et al, 2008) y de análisis de modelación numérica (Meccia, et al, 2013;De Mello, et al, en revisión). En la identificación de este tipo de fenómeno, los sensores satelitales son muchas veces limitantes en cuanto a resolución espacial y no logran captarlos, o los subestiman en intensidad (Meneghesso, et al, 2020), principalmente cuando no son muy intensos o están comenzando a desarrollarse. Por ello, las mediciones in situ continuas constituyen una fuente de información de gran utilidad para investigar las surgencias desde su inicio hasta alcanzar su máxima extensión e intensidad.…”

Section: Aportes De La Base De Datos Al Monitoreo De Procesos Oceanogunclassified

Hacia un monitoreo continuo de variables oceanográficas en el Parque Nacional Isla de Flores, Uruguay

Trinchin

Manta

Hernández

et al. 2020

INNOTEC

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Remotely-sensed L4 SST underestimates the thermal fingerprint of coastal upwelling

Cited by 42 publications

References 49 publications

A novel approach to quantify metrics of upwelling intensity, frequency, and duration

A novel approach to quantify metrics of upwelling intensity, frequency, and duration

Novel co‐occurrence of functionally redundant consumers induced by range expansion alters community structure

Hacia un monitoreo continuo de variables oceanográficas en el Parque Nacional Isla de Flores, Uruguay

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