Alex Lipp
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View article: www.SewageMap.co.uk and POOPy: Open-source tools for understanding and communicating the environmental impacts of combined sewer overflows in real-time
www.SewageMap.co.uk and POOPy: Open-source tools for understanding and communicating the environmental impacts of combined sewer overflows in real-time Open
Combined Sewer Overflow (CSO) discharges occur when combined sewer systems exceed capacity leading to the discharge of untreated sewage and storm-water into rivers and seas. These events introduce pollutants such as microplastics, pharmace…
View article: Geochemical—Mineralogical Constraints on the Provenance of Sediment Supplied From South African River Catchments Draining Into the Southwestern Indian Ocean
Geochemical—Mineralogical Constraints on the Provenance of Sediment Supplied From South African River Catchments Draining Into the Southwestern Indian Ocean Open
This study utilizes the radiogenic isotopes of neodymium (Nd) and strontium (Sr) measured in river mud —which serves as a proxy for the suspended load—to examine how source‐rock lithology and weathering intensity impact the composition of …
View article: Apportioning sources of chemicals of emerging concern along an urban river with inverse modelling
Apportioning sources of chemicals of emerging concern along an urban river with inverse modelling Open
Concentrations of chemicals in river water provide crucial information for assessing environmental exposure and risks from fertilisers, pesticides, heavy metals, illicit drugs, pathogens, pharmaceuticals, plastics and perfluorinated substa…
View article: Using Convex Optimization to Efficiently Apportion Tracer and Pollutant Sources From Point Concentration Observations
Using Convex Optimization to Efficiently Apportion Tracer and Pollutant Sources From Point Concentration Observations Open
Rivers transport elements, minerals, chemicals, and pollutants produced in their upstream basins. A sample from a river is a mixture of all of its upstream sources, making it challenging to pinpoint the contribution from each individual so…
View article: Cosmic dust fertilization of glacial prebiotic chemistry on early Earth
Cosmic dust fertilization of glacial prebiotic chemistry on early Earth Open
Earth’s surface is deficient in available forms of many elements considered limiting for prebiotic chemistry. In contrast, many extraterrestrial rocky objects are rich in these same elements. Limiting prebiotic ingredients may, therefore, …
View article: Apportioning sources of chemicals of emerging concern along an urban river with inverse modelling
Apportioning sources of chemicals of emerging concern along an urban river with inverse modelling Open
Concentrations of chemicals in river water provide crucial information for assessing environmental exposure to fertilisers and insecticides, heavy metals, illicit drugs, pathogens, pharmaceuticals, plastics and perfluorinated substances am…
View article: Using convex optimization to efficiently apportion tracer and pollutant sources from point concentration observations
Using convex optimization to efficiently apportion tracer and pollutant sources from point concentration observations Open
Rivers transport elements, minerals, chemicals, and pollutants produced in their upstream basins. A sample from a river is a mixture of all of its upstream sources, making it challenging to pinpoint the contribution from each individual so…
View article: Towards Inverse Modeling of Landscapes Using the Wasserstein Distance
Towards Inverse Modeling of Landscapes Using the Wasserstein Distance Open
Extricating histories of uplift and erosion from landscapes is crucial for many branches of the Earth sciences. An objective way to calculate such histories is to identify calibrated models that minimize misfit between observations (e.g., …
View article: Short communication: The Wasserstein distance as a dissimilarity metric for comparing detrital age spectra and other geological distributions
Short communication: The Wasserstein distance as a dissimilarity metric for comparing detrital age spectra and other geological distributions Open
Distributional data such as detrital age populations or grain size distributions are common in the geological sciences. As analytical techniques become more sophisticated, increasingly large amounts of distributional data are being gathere…
View article: Evolution of the crustal phosphorus reservoir
Evolution of the crustal phosphorus reservoir Open
The release of phosphorus (P) from crustal rocks during weathering plays a key role in determining the size of Earth’s biosphere, yet the concentration of P in crustal rocks over time remains controversial. Here, we combine spatial, tempor…
View article: Multidimensional Scaling of Varietal Data in Sedimentary Provenance Analysis
Multidimensional Scaling of Varietal Data in Sedimentary Provenance Analysis Open
Varietal studies of sedimentary provenance use the properties of individual minerals or mineral groups. These are recorded as lists of numerical tables that can be difficult to interpret. Multidimensional Scaling (MDS) is a popular multiva…
View article: Geochemical mapping by unmixing alluvial sediments: An example from northern Australia
Geochemical mapping by unmixing alluvial sediments: An example from northern Australia Open
Alluvial sediments have long been used in geochemical surveys as their compositions are assumed to be representative of areas upstream. Overbank and floodplain sediments, in particular, are increasingly used for regional to continental-sca…
View article: Identifying tracer and pollutant sources in drainage networks from point observations using an efficient convex unmixing scheme
Identifying tracer and pollutant sources in drainage networks from point observations using an efficient convex unmixing scheme Open
Water and sediment transport minerals, micro-plastics, heavy-metals, pathogens, DNA, RNA, and emerging contaminants through river networks. We would like to use point observations of these concentrations to determine where and how much of …
View article: Quantifying excess heavy metal concentrations in drainage basins using conservative mixing models
Quantifying excess heavy metal concentrations in drainage basins using conservative mixing models Open
High concentrations of heavy metals and other pollutants in river sediments can have detrimental effects on the ecosystem and humans. The composition of river sediments throughout drainage basins therefore provides important information fo…
View article: Towards inverse modeling of landscapes using the Wasserstein distance
Towards inverse modeling of landscapes using the Wasserstein distance Open
The use of the Wasserstein distance for identifying optimal landscape evolution models is demonstrated.• This approach can produce simple objective functions, simplifying the search for models that minimise data misfit.• Accurate amplitude…
View article: Reply on RC1
Reply on RC1 Open
Abstract. Distributional data such as detrital age populations or grain size distributions are common in the geological sciences. As analytical techniques become more sophisticated, increasingly large amounts of distributional data are bei…
View article: Reply on RC2
Reply on RC2 Open
Abstract. Distributional data such as detrital age populations or grain size distributions are common in the geological sciences. As analytical techniques become more sophisticated, increasingly large amounts of distributional data are bei…
View article: Reply on RC3
Reply on RC3 Open
Abstract. Distributional data such as detrital age populations or grain size distributions are common in the geological sciences. As analytical techniques become more sophisticated, increasingly large amounts of distributional data are bei…
View article: Reply on RC2 - Data Access
Reply on RC2 - Data Access Open
Abstract. Distributional data such as detrital age populations or grain size distributions are common in the geological sciences. As analytical techniques become more sophisticated, increasingly large amounts of distributional data are bei…
View article: Short Communication: The Wasserstein distance as a dissimilarity metric for comparing detrital age spectra, and other geological distributions
Short Communication: The Wasserstein distance as a dissimilarity metric for comparing detrital age spectra, and other geological distributions Open
Distributional data such as detrital age populations or grain size distributions are common in the geological sciences. As analytical techniques become more sophisticated, increasingly large amounts of distributional data are being gathere…
View article: Geochemical mapping by unmixing alluvial sediments: An example from northern Australia
Geochemical mapping by unmixing alluvial sediments: An example from northern Australia Open
Alluvial sediments have long been used in geochemical surveys as their compositions are assumed to be representative of areas upstream. Overbank and floodplain sediments, in particular, are increasingly used for regional to continental-sca…
View article: An unmixing approach to geochemical mapping using alluvial sediments: An example from northern Australia
An unmixing approach to geochemical mapping using alluvial sediments: An example from northern Australia Open
Data and code accompanying the manuscript: 'An unmixing approach to geochemical mapping using alluvial sediments: An example from northern Australia'
View article: Quantifying excess heavy metal concentrations in drainage basins using conservative mixing models
Quantifying excess heavy metal concentrations in drainage basins using conservative mixing models Open
High concentrations of heavy metals and other pollutants in river sediments can have detrimental effects on the ecosystem and humans. The composition of river sediments throughout drainage basins therefore provides important information fo…
View article: Quantifying heavy metal concentrations throughout drainage basins from river sediment mixing
Quantifying heavy metal concentrations throughout drainage basins from river sediment mixing Open
<p><span>The concentration of elements in river sediments play a fundamental role in determining the &#8216;health&#8217; of rivers. They also contain important information about provenance and geomorphic processes (e.g…