A5080349832- Marine and coastal ecosystems
- Marine Biology and Ecology Research
- Oceanographic and Atmospheric Processes
- Remote Sensing in Agriculture
- Atmospheric and Environmental Gas Dynamics
- Water Quality Monitoring and Analysis
- Marine and fisheries research
- Isotope Analysis in Ecology
- Oil Spill Detection and Mitigation
- Remote Sensing and LiDAR Applications
- Water Quality Monitoring Technologies
- Coral and Marine Ecosystems Studies
- Remote-Sensing Image Classification
- Remote Sensing and Land Use
- Satellite Image Processing and Photogrammetry
- Geographic Information Systems Studies
- Ocean Acidification Effects and Responses
- Calibration and Measurement Techniques
- Coastal and Marine Dynamics
- Underwater Acoustics Research
- Geochemistry and Geologic Mapping
- Atmospheric Ozone and Climate
- Cryospheric studies and observations
- Coastal and Marine Management
- Oil, Gas, and Environmental Issues
Australian Government
2024
Gold Coast Hospital
2011-2024
University of Plymouth
2009-2023
Plymouth Marine Laboratory
2001-2023
Bjerknes Centre for Climate Research
2023
NORCE Norwegian Research Centre
2023
University of Bedfordshire
2017-2019
European Space Research Institute
2015
Argans (United Kingdom)
2009-2012
University of Leicester
2012
Ocean colour is recognised as an Essential Climate Variable (ECV) by the Global Observing System (GCOS); and spectrally-resolved water-leaving radiances (or remote-sensing reflectances) in visible domain, chlorophyll-a concentration are identified required ECV products. Time series of products at global scale high spatial resolution, derived from ocean-colour data, key to studying dynamics phytoplankton seasonal inter-annual scales; their role marine biogeochemistry; carbon cycle; modulation...
Ocean color measured from satellites provides daily, global estimates of marine inherent optical properties (IOPs). Semi-analytical algorithms (SAAs) provide one mechanism for inverting the water observed by satellite into IOPs. While numerous SAAs exist, most are similarly constructed and few appropriately parameterized all masses seasons. To initiate community-wide discussion these limitations, NASA organized two workshops that deconstructed to identify similarities uniqueness progress...
Spectrally-resolved water-leaving radiances (ocean colour) and inferred chlorophyll concentration are key to studying phytoplankton dynamics at seasonal inter-annual scales, for a better understanding of the role in marine biogeochemistry; global carbon cycle; response ecosystems climate variability, change feedback processes. Ocean colour data also have critical operational observation systems monitoring coastal eutrophication, harmful algal blooms, sediment plumes. The contiguous...
The remote sensing of turbid waters (Case II) using the Medium Resolution Imaging Spectrometer (MERIS) requires new approaches for atmospheric correction data. Unlike open ocean I waters) there are no wavelengths where water-leaving radiance is zero. A coupled hydrological model described here. solves and path in near-infrared (NIR) over Case II waters. theoretical basis this described, together with its place proposed MERIS processing architecture. Flagging procedures presented that allow...
During the 1980s, a rapid increase in Phytoplankton Colour Index (PCI), semiquantitative visual estimate of algal biomass, was observed North Sea as part regionwide regime shift. Two new data sets created from relationship between PCI and SeaWiFS chlorophyll (Chl ) quantify differences previous current regimes for both anthropogenically affected coastal comparatively unaffected open Sea. The maintains 13% higher Chl concentration 21% waters. However, has lower total nitrogen phosphorus...
The concept of phytoplankton functional types has emerged as a useful approach to classifying phytoplankton. It finds many applications in addressing some serious contemporary issues facing science and society. Its use is not without challenges, however. As noted earlier, there no universally-accepted set types, and the used have to be carefully selected suit particular problem being addressed. important that sum total all matches all phytoplankton under consideration. For example, if...
Intensifying pressure on global aquatic resources and services due to population growth climate change is inspiring new surveying technologies provide science-based information in support of management policy strategies. One area rapid development hyperspectral remote sensing: imaging across the full spectrum visible infrared light. Hyperspectral imagery contains more environmentally meaningful than panchromatic or multispectral poised applications relevant society, including assessments...
The ocean plays a central role in modulating the Earth's carbon cycle. Monitoring how cycle is changing fundamental to managing climate change. Satellite remote sensing currently our best tool for viewing surface globally and systematically, at high spatial temporal resolutions, past few decades have seen an exponential growth studies utilising satellite data research. Satellite-based observations must be combined with in-situ models, obtain comprehensive view of pools fluxes. To help...
Abstract This review paper reports on the state-of-the-art concerning observations of surface winds, waves, and currents from space their use for scientific research subsequent applications. The development sea state parameters dates back to 1970s, with a significant increase in number diversity missions since 1990s. Sensors used monitor sea-state are mainly based microwave techniques. They either specifically designed or abilities provide opportunistic measurements complementary primary...
Spectral measurements of remote-sensing reflectance (Rrs) and absorption coefficients carried out in three European estuaries (Gironde Loire France, Tamar the UK) are presented analyzed. Typical Rrs spectra compared with typical values measured coastal waters. The respective contributions water constituents, i.e., suspended sediments, colored dissolved organic matter, phytoplankton (characterized by chlorophyll-a), determined. then reproduced an optical model from fitted backscattering...
Deriving maps of phytoplankton taxa based on remote sensing data using bio‐optical properties alone is challenging. A more holistic approach was developed artificial neural networks, incorporating ecological and geographical knowledge together with ocean color, characteristics, remotely sensed physical parameters. Results show that the combined could discriminate four major functional types (diatoms, dinoflagellates, coccolithophores, silicoflagellates) an accuracy than 70%. Models indicate...
We characterize near‐surface ocean diurnal warm‐layer events, using satellite observations and fields from numerical weather forecasting. The study covers April to September, 2006, over the area 11°W 17°E 35°N 57°N, with 0.1° cells. use hourly SSTs which peak amplitudes of cycles in SST (dSSTs) can be estimated error ∼0.3 K. excursions observed are spatially temporally coherent. largest dSSTs exceed 6 K, affect 0.01% surface, seen Mediterranean, North Irish Seas. There is an anti‐correlation...
Soil Moisture and Ocean Salinity (SMOS), launched on 2 November 2009, is the first satellite mission addressing sea surface salinity (SSS) measurement from space. Its unique payload Microwave Imaging Radiometer using Aperture Synthesis (MIRAS), a new two-dimensional interferometer designed by European Space Agency (ESA) operating at L-band frequency. This article presents summary of SSS retrieval SMOS observations shows initial results obtained one year after launch. These are encouraging,...
Using the phytoplankton size-class model of Brewin et al. [Ecol. Model.221, 1472 (2010)], two-population absorption Sathyendranath [Int. J. Remote. Sens.22, 249 (2001)] and Devred [J. Geophys. Res.111, C03011 (2006)] is extended to three populations phytoplankton, namely, picophytoplankton, nanophytoplankton, microphytoplankton. The new infers total size-dependent as a function chlorophyll-a concentration. A main characteristic that all parameters describe it have biological or optical...
Several environmental/physical variables derived from satellite and in situ data sets were used to understand the variability of coccolithophore abundance subarctic North Atlantic. The 7-yr (1997-2004) time-series analysis showed that combined effects high solar radiation, shallow mixed layer depth (>20 m), increased temperatures explained >89% variation. June 1998 bloom, which was associated with light intensity, unusually sea-surface temperature, a very layer, found be one most extensive...
We measured water leaving reflectance, phytoplankton pigments, optical properties and photosynthetic parameters in the southern Benguela ecosystem October 2002. These data were used to validate MERIS standard products: reflectance (MERIS wavelengths) Case 1 Chlorophyll‐a. In this heterogeneous area, accurate validation required sampling within a few minutes of satellite overpass. Inter‐pigment relationships e.g. Total Chlorophyll (TChla) Pigment (TP) robust (R2∼0.99) yet pigment ratios...