Steve Groom

Steve Groom
Plymouth Marine Laboratory | PML · Remote Sensing Group

MSc

About

132
Publications
40,755
Reads
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6,518
Citations
Citations since 2017
20 Research Items
2582 Citations
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20172018201920202021202220230100200300400500
20172018201920202021202220230100200300400500

Publications

Publications (132)
Preprint
Full-text available
A global in-situ data set for validation of ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI) is presented. This version of the compilation, starting in 1997, now extends to 2021, which is important for the validation of the most recent satellite optical sensors such as Sentinel 3B OLCI and NOAA-20 VIIRS. The data s...
Article
Satellite remote sensing data are important to the study of environment problems at a global scale. The GloboLakes project aimed to use satellite remote sensing data to investigate the response of the major lakes on Earth to environmental conditions and change. The main challenge to statistical modelling is the identification of the spatial structu...
Article
Full-text available
Phytoplankton biomass, through its proxy, Chlorophyll a , has been assessed at synoptic temporal and spatial scales with satellite remote sensing (RS) for over two decades. Also, RS algorithms to monitor relative size classes abundance are widely used; however, differentiating functional types from RS, as well as the assessment of phytoplankton str...
Article
Full-text available
Satellite remote sensing can provide indicative measures of environmental variables that are crucial to understanding the environment. The spatial and temporal coverage of satellite images allows scientists to investigate the changes in environmental variables in an unprecedented scale. However, identifying spatiotemporal patterns from such images...
Article
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NEOM (short for Neo-Mustaqbal) is a $500 billion coastal city megaproject, currently under construction in the northwestern part of the Red Sea, off the coast of Tabuk province in Saudi Arabia, and its success will rely on the preservation of biodiverse marine ecosystems. Monitoring the variability of ecological indicators, such as phytoplankton, i...
Article
Full-text available
The element carbon plays a central role in climate and life on Earth. It is capable of moving among the geosphere, cryosphere, atmosphere, biosphere and hydrosphere. This flow of carbon is referred to as the Earth's carbon cycle. It is also intimately linked to the cycling of other elements and compounds. The ocean plays a fundamental role in Earth...
Article
Full-text available
Surface waters are a fundamental resource. They fulfil key function in global biogeochemical cycles and are core to our water, food and energy security. The rapidly increasing rate of data collection from different Earth observation (EO) missions suitable for observing water bodies has promoted satellite remote sensing (RS) as a more widely recogni...
Technical Report
Full-text available
This Science and Innovation Agenda summarises the scientific and technical framework for the development of DANUBIUS-RI. The International Centre for advanced Studies on River-Sea Systems is a distributed environmental research infrastructure dedicated to River-Sea Systems on the Roadmap of the European Strategy Forum on Research Infrastructures (E...
Article
Full-text available
Ocean colour is recognised as an Essential Climate Variable (ECV) by the Global Climate Observing System (GCOS); and spectrally-resolved water-leaving radiances (or remote-sensing reflectances) in the visible domain, and chlorophyll-a concentration are identified as required ECV products. Time series of the products at the global scale and at high...
Article
Full-text available
High-resolution satellite images of ocean color and sea surface temperature reveal an abundance of ocean fronts, vortices and filaments at scales below 10 km but measurements of ocean surface dynamics at these scales are rare. There is increasing recognition of the role played by small scale ocean processes in ocean-atmosphere coupling, upper-ocean...
Article
Full-text available
Spectrally resolved water-leaving radiances (ocean colour) and inferred chlorophyll concentration are key to studying phytoplankton dynamics at seasonal and inter-annual scales, for a better understanding of the role of phytoplankton in marine biogeochemistry; the global carbon cycle; and the response of marine ecosystems to climate variability, ch...
Article
Full-text available
A global compilation of in situ data is useful to evaluate the quality of ocean-colour satellite data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (including, inter alia, MOBY, BOUSSOLE, AERONET-OC...
Article
Abstract Seasonal and inter-annual variability of satellite-derived net primary production (NPP) in the NW Iberian margin and its relationship with the offshore Ekman transport (-Qx) and a variety of sea surface temperature (SST) indices have been examined over the period 1998-2016. Seasonality explained about 55% of NPP variability over the shelf...
Article
Full-text available
A global compilation of in situ data is useful to evaluate the quality of ocean-colour satellite data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (including, inter alia, MOBY, BOUSSOLE, AERONET-OC...
Conference Paper
Full-text available
Global datasets from water resources reanalyses are increasingly becoming available, enabling consistent assessment of water resources availability, variability and trends at the global level. These datasets are often purported to promote better decision making and policy implementation. While these claims are real, and often used to motivate resea...
Poster
Full-text available
The iFADO project (Innovation in the Framework of the Atlantic Deep Ocean) is a European project funded from ERDF funds of the INTERREG Atlantic Area Programme that will develop its activities during the period November 2018-2021. The project aims to create marine services at regional and subregional scale using the EU Atlantic Waters as a case stu...
Article
Research at the interface between terrestrial, riverine, estuarine and marine environments is frequently constrained by significant disciplinary and geographical boundaries. This article outlines an international initiative, DANUBIUS-RI, which aims to address these problems by facilitating biogeochemical monitoring and interdisciplinary research on...
Article
Chlorophyll-a (Chl a) is a key parameter for the assessment of water quality in coastal and shelf environments. The availability of satellite ocean colour offers the potential of monitoring these regions at unprecedented spatial and temporal scales, as long as a high level of accuracy can be achieved. To use satellite derived Chl a to monitor these...
Article
Full-text available
Atmospheric correction of remotely sensed imagery of inland water bodies is essential to interpret water-leaving radiance signals and for the accurate retrieval of water quality variables. Atmospheric correction is particularly challenging over inhomogeneous water bodies surrounded by comparatively bright land surface. We present results of AisaFEN...
Article
Full-text available
Ocean colour is the only essential climate variable that targets a biological variable (chlorophyll-a concentration (chl-a)) and is also amenable to remote sensing at the global scale. However, the finite lifetime of individual ocean-colour sensors, and the differences in their characteristics increase the difficulty of creating a long-term, consis...
Article
Full-text available
A compiled set of in situ data is important to evaluate the quality of ocean-colour satellite-data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID,...
Article
Full-text available
The Earth's surface waters are a fundamental resource and encompass a broad range of ecosystems that are core to global biogeochemical cycling and food and energy production. Despite this, the Earth's surface waters are impacted by multiple natural and anthropogenic pressures and drivers of environmental change. The complex interaction between phys...
Article
Full-text available
A compiled set of in situ data is important to evaluate the quality of ocean-olour satellite data records. Here we describe the data compiled for the validation of the ocean-colour products from the ESA Ocean Colour Climate Change Initiative (OC-CCI). The data were acquired from several sources (MOBY, BOUSSOLE, AERONET-OC, SeaBASS, NOMAD, MERMAID,...
Conference Paper
Full-text available
Poster presented at SmartSound Plymouth Workshop 2015. Recent high spatial resolution Earth observing sensors allow us to observe spatially heterogeneous systems in the near-shore environment. Thus, remote sensing starts to address environmental challenges within the first kilometres from the coastline and of highest relevance to coastal communiti...
Article
Full-text available
Satellite-derived remote-sensing reflectance (Rrs) can be used for mapping biogeochemically relevant variables, such as the chlorophyll concentration and the Inherent Optical Properties (IOPs) of the water, at global scale for use in climate-change studies. Prior to generating such products, suitable algorithms have to be selected that are appropri...
Article
Full-text available
The established procedure to access the quality of atmospheric correction processors and their underlying algorithms is the comparison of satellite data products with related in-situ measurements. Although this approach addresses the accuracy of derived geophysical properties in a straight forward fashion, it is also limited in its ability to catch...
Article
Full-text available
The Ocean Colour Climate Change Initiative intends to provide a long-term time series of ocean colour data and investigate the detectable climate impact. A reliable and stable atmospheric correction procedure is the basis for ocean colour products of the necessary high quality. In order to guarantee an objective selection from a set of four atmosph...
Article
Full-text available
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 m...
Conference Paper
In the first phase of the ocean-colour component of the European Space Agency (ESA) Climate-Change Initiative (OC-CCI), atmospheric correction and in-water algorithms for use in the generation of ocean-colour products for climate-change studies were compared, prior to selection. A time series of ocean-colour products from 1997 to 2012 has now been...
Conference Paper
Ocean colour (OC) is an Oceanic Essential Climate Variable, which is used by climate modellers and researchers. The European Space Agency (ESA) Climate Change Initiative project, is the ESA response for the need of climate-quality satellite data, with the goal of providing stable, long-term, satellite-based ECV data products. The ESA Ocean Colour C...
Conference Paper
Nesta apresentação é descrita a base de dados utilizada para a validação dos novos produtos de satélite da cor do oceano desenvolvidos no projecto ESA "Ocean Colour Climate Change Initiative". Este projecto tem como objectivo assimilar dados da cor do oceano de diferentes satélites, num único produto consistente para estudos climáticos. A base de d...
Article
The validation of satellite ocean-color products is an important task of ocean-color missions. The uncertainties of these products are poorly quantified in the Yellow Sea (YS) and East China Sea (ECS), which are well known for their optical complexity and turbidity in terms of both oceanic and atmospheric optical properties. The objective of this p...
Conference Paper
ESA's Climate Change Initiative project aims to develop and validate algorithms to meet the Ocean Colour GCOS ECV requirements for consistent, stable, error-characterized global satellite data products from multi-sensor data archives and produce and validate, within an R&D context, the most complete and consistent possible time series of multi-sens...
Article
Full-text available
Un-supervised hyperspectral remote-sensing reflectance data (<15 km from the shore) were collected from a moving research vessel. Two different processing methods were compared. The results were similar to concurrent Aqua-MODIS and Suomi-NPP-VIIRS satellite data.
Article
Full-text available
Migrations between different habitats are key events in the lives of many organisms. Such movements involve annually recurring travel over long distances usually triggered by seasonal changes in the environment. Often, the migration is associated with travel to or from reproduction areas to regions of growth. Young anadromous Atlantic salmon (Salmo...
Article
Coccolithophores, the dominant pelagic calcifiers in the oceans, play a key role in the marine carbon cycle through calcification, primary production and carbon export, the main drivers of the biological CO 2 pump. In May 2002 a cruise was conducted on the outer shelf of the North-West European continental margin, from the north Bay of Biscay to th...
Article
eScience is an umbrella concept which covers internet technologies, such as web service orchestration that involves manipulation and processing of high volumes of data, using simple and efficient methodologies. This concept is normally associated with bioinformatics, but nothing prevents the use of an identical approach for geoinfomatics and OGC (O...
Article
The use of Ocean Colour Remote Sensing to monitor phytoplankton blooms in coastal waters is hampered by the absorption and scattering from substances in the water that vary independently of phytoplankton. In this paper we compare different ocean colour algorithms available for SeaWiFS, MODIS and MERIS with in situ observations of Remote Sensing Ref...
Article
Full-text available
Understanding the sources of the optical backscattering coefficient from particles (b(bp)) aids interpretation of ocean colour measured from satellites. The hypothesis tested is that phytoplankton make a significant contribution to the b(bp) in the open ocean. Using phytoplankton pigment, flow cytometry and microscopy data, measured concurrently wi...
Article
Three ocean colour algorithms, OC4v6, Carder and OC5 were tested for retrieving Chlorophyll-a (Chla) in coastal areas of the Bay of Bengal and open ocean areas of the Arabian Sea. Firstly, the algorithms were run using ~80 in situ Remote Sensing Reflectance, (Rrs(λ)) data collected from coastal areas during eight cruises from January 2000 to March...
Poster
Full-text available
In recent years PFT (Phytoplankton Functional Types) and PSC (Phytoplankton Size Class) distributions on a global scale have received increasing attention, due to the different roles PFTs play in biogeochemical cycles and to the strong effect that any change in the balance between groups would have upon marine ecosystems, especially in the context...
Article
Primary production (PP), calcification (CAL), bacterial production (BP) and dark community respiration (DCR) were measured along with a set of various biogeochemical variables, in early June 2006, at several stations at the shelf break of the northern Bay of Biscay. The cruise was carried out after the main spring diatom bloom that, based on the an...
Article
An extensive in situ data set in the Bohai Sea of China was collected to assess radiometric properties and concentrations of ocean constituents derived from Medium Resolution Imaging Spectrometer (MERIS). The data collected include spectral normalized water-leaving radiance Lwn(λ) and concentrations of suspended particulate matter (SPM) and chlorop...
Article
Full-text available
The MERIS instrument delivers a unique dataset of ocean colour measurements of the coastal zone, at 300m resolution and with a unique spectral band set. The motivation for the Coastcolour project is to fully exploit the potential of the MERIS instrument for remote sensing of the coastal zone. The general objective of the project is to develop, demo...
Article
The present paper synthesizes data obtained during a multidisciplinary cruise carried out in June 2004 at the continental margin of the northern Bay of Biscay. The data-set allows to describe the different stages of a coccolithophore bloom dominated by Emiliania huxleyi. The cruise was carried out after the main spring phytoplankton bloom that star...
Article
a b s t r a c t This paper presents a multilayered ecosystem modelling approach that combines the simulation of the biogeochemistry of a coastal ecosystem with the simulation of the main forcing functions, such as catchment loading and aquaculture activities. This approach was developed as a tool for sustainable management of coastal ecosystems. A...
Conference Paper
Full-text available
Two FP6 initiatives i) HYRESSA, hyperspectral remote sensing in Europe specific support action, and ii) EUFAR, European Facility for Airborne Research in Environmental and Geo-sciences, have joined forces in FP7. The FP7 Integrating Activity EUFAR (including HYRESSA) is now a network of 33 European airborne data providers and experts in airborne me...
Article
The distribution of transparent exopolymer particles (TEP) was investigated during a coccolithophorid bloom in the northern Bay of Biscay (North Atlantic Ocean) in early June 2006. MODIS chlorophyll-a (Chl-a) and reflectance images before and during the cruise were used to localize areas of important biological activity and high reflectance (HR). T...
Article
This paper presents an optical classification of station L4 south of Plymouth in the western English Channel based on satellite and in situ observations. Weekly-sampled in situ data from 2003 and 2004 are presented on temperature and salinity with depth, together with surface measurements of absorption by phytoplankton, coloured dissolved organic m...
Article
Full-text available
This paper presents services and systems developed in the FP6 InterRisk (Interoperable GMES Services for Environmental Risk Management in Marine and Coastal Areas of Europe) project, which addresses the need for better access to information for risk management in Europe, both in cases of natural hazards and industrial accidents. The overall objecti...
Article
A biogeochemical multidisciplinary survey was carried out in the northern Bay of Biscay, in early June 2006, during which were determined carbon metabolic rates (14C-based primary production and calcification, O2-based pelagic and benthic community respiration, bacterial production) and several variables (partial pressure of CO2 (pCO2), total alkal...
Book
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This book describes the approach and main result obtained in the Sustainable options for People, Catchment and Aquatic Resources (SPEAR) Project, together with complementary case studies focusing on realted work in China and in the United States. Each chapter in this book is designed to be readable by itself and contains enough information for the...
Article
Full-text available
This paper investigates the possible underlying causes of the wide interannual fluctuations in catch of the common octopus Octopus vulgaris Cuvier, 1797 in one of the main small-scale fisheries off the coast of Galicia (northwest Spain). Galicia is at the northern boundary of the Iberian-Canary current upwelling system in the northeast Atlantic Oce...
Conference Paper
Full-text available
Daily satellite–derived net primary (NPP) and new (NP) production rates, calibrated with in situ observations, have been used to study the seasonal and interannual variability of the productivity of the continental shelf and the adjacent slope waters of the NW Iberian Peninsula from 42ºN to 43ºN. Considering the whole study period, 1998 to 2005, th...
Conference Paper
Full-text available
Having and maintaining suitable water quality is critical to sustain life on our planet. Monitoring of water quality using remote sensing, in conjunction with strategic in situ sampling can play a crucial role in determining the current status of water quality conditions and helps anticipate, mitigate and even avoid future water catastrophes. The G...
Article
Harmful dinoflagellate blooms are frequent in the $R\acute{i}as$ Baixas, which are made up of four open bays on the northwest part of the Iberian Peninsula. The relationship between surface currents resulting from wind forcing and the microplankton composition on the shelf offshore of the $R\acute{i}as$ Baixas was studied from May 2001 to April 200...
Article
National and regional obligations to control and maintain water quality have led to an increase in coastal and estuarine monitoring. A potentially valuable tool is high temporal and spatial resolution satellite ocean colour data. NASA's MODIS-Terra and -Aqua can capture data at both 250 m and 500 m spatial resolutions and the existence of two senso...