Murray Richardson
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View article: Multispectral and LiDAR-Derived Vegetation Indicators of Water Table Dynamics in Forested Wetlands
Multispectral and LiDAR-Derived Vegetation Indicators of Water Table Dynamics in Forested Wetlands Open
We examined the potential to use remotely sensed measures of vegetation composition and structure, including spaceborne multispectral and airborne light detection and ranging (LiDAR) variables, as indicators of forested wetland hydrology. …
View article: Watershed hydrology mediates the recovery of an arsenic impacted subarctic landscape
Watershed hydrology mediates the recovery of an arsenic impacted subarctic landscape Open
A holistic understanding of the chemical recovery of lakes from arsenic (As) pollution requires consideration of within-lake biogeochemical cycling of As and processes occurring in the surrounding catchment. This study used a watershed mas…
View article: An improved method for semi-automated identification of submarine canyons and sea channels using digital bathymetric analysis
An improved method for semi-automated identification of submarine canyons and sea channels using digital bathymetric analysis Open
Submarine canyons are the key structures of the transitional area between the deep ocean floor and continental shelf known as continental slope. They are important submarine features with high ecological, economic, and scientific value. Wi…
View article: The Plasma Instrument for Magnetic Sounding (PIMS) on the Europa Clipper Mission
The Plasma Instrument for Magnetic Sounding (PIMS) on the Europa Clipper Mission Open
Characterizing Europa’s subsurface ocean is essential for assessing Europa’s habitability. The suite of instruments on the Europa Clipper spacecraft will, among others, magnetically sound Europa’s interior by measuring the ocean’s induced …
View article: Diet and landscape characteristics drive spatial patterns of mercury accumulation in a high-latitude terrestrial carnivore
Diet and landscape characteristics drive spatial patterns of mercury accumulation in a high-latitude terrestrial carnivore Open
Limited information exists on mercury concentrations and environmental drivers of mercury bioaccumulation in high latitude terrestrial carnivores. Spatial patterns of mercury concentrations in wolverine ( Gulo gulo , n = 419) were assessed…
View article: Mineralogical, geospatial, and statistical methods combined to estimate geochemical background of arsenic in soils for an area impacted by legacy mining pollution
Mineralogical, geospatial, and statistical methods combined to estimate geochemical background of arsenic in soils for an area impacted by legacy mining pollution Open
The estimation of geochemical background is complex in areas impacted by point sources of atmospheric emissions due to unknowns about pollutant dispersion, persistence of pollutants on the landscape, and natural concentrations of elements …
View article: The role of wetland coverage within the near‐stream zone in predicting of seasonal stream export chemistry from forested headwater catchments
The role of wetland coverage within the near‐stream zone in predicting of seasonal stream export chemistry from forested headwater catchments Open
Stream chemistry is often used to infer catchment‐scale biogeochemical processes. However, biogeochemical cycling in the near‐stream zone or hydrologically connected areas may exert a stronger influence on stream chemistry compared with cy…
View article: Soil Moisture Monitoring in a Temperate Peatland Using Multi-Sensor Remote Sensing and Linear Mixed Effects
Soil Moisture Monitoring in a Temperate Peatland Using Multi-Sensor Remote Sensing and Linear Mixed Effects Open
The purpose of this research was to use empirical models to monitor temporal dynamics of soil moisture in a peatland using remotely sensed imagery, and to determine the predictive accuracy of the approach on dates outside the time series t…
View article: AusAEM; acquisition of AEM at an unprecedented scale
AusAEM; acquisition of AEM at an unprecedented scale Open
Exploring for the Future is a four-year programme of the Commonwealth Government that aims to boost Australia's attractiveness as a destination for investment in resource exploration. A significant component of the data acquisition compone…
View article: Airborne gravimetry takes off in the Western Australia ‘Generation 2’ reconnaissance gravity mapping project
Airborne gravimetry takes off in the Western Australia ‘Generation 2’ reconnaissance gravity mapping project Open
In 1974, the Australian Bureau of Mineral Resources, Geology and Geophysics completed a 15-year systematic reconnaissance gravity survey of Australia with stations spaced at 11 km. The 1976 Gravity Map of Australia was a seminal product; h…
View article: A Systematic Approach for Variable Selection With Random Forests: Achieving Stable Variable Importance Values
A Systematic Approach for Variable Selection With Random Forests: Achieving Stable Variable Importance Values Open
Random Forests variable importance measures are often used to rank variables by their relevance to a classification problem and subsequently reduce the number of model inputs in high-dimensional data sets, thus increasing computational eff…
View article: Fusion of Multispectral Imagery and Spectrometer Data in UAV Remote Sensing
Fusion of Multispectral Imagery and Spectrometer Data in UAV Remote Sensing Open
High spatial resolution hyperspectral data often used in precision farming applications are not available from current satellite sensors, and difficult or expensive to acquire from standard aircraft. Alternatively, in precision farming, un…
View article: Moving to the RADARSAT Constellation Mission: Comparing Synthesized Compact Polarimetry and Dual Polarimetry Data with Fully Polarimetric RADARSAT-2 Data for Image Classification of Peatlands
Moving to the RADARSAT Constellation Mission: Comparing Synthesized Compact Polarimetry and Dual Polarimetry Data with Fully Polarimetric RADARSAT-2 Data for Image Classification of Peatlands Open
For this research, the Random Forest (RF) classifier was used to evaluate the potential of simulated RADARSAT Constellation Mission (RCM) data for mapping landcover within peatlands. Alfred Bog, a large peatland complex in Southern Ontario…