Filtering by Subject: Other Life Sciences

Chevrons: origin and relevance for the reconstruction of past wind regimes

Lucas Erouan Vimpere, Pascal Kindler, Sébastien Castelltort

Published: 2020-12-15
Subjects: Climate, Earth Sciences, Geology, Geomorphology, Meteorology, Other Life Sciences, Sedimentology, Stratigraphy

Since its first use in the late 80’s, the term chevron has been employed in numerous studies to describe large U- and V-shaped ridges found in or near shorelines worldwide. Most studies have so far focused on Bahamian chevrons that are exclusively of Late Pleistocene age, and on the supposed Holocene chevrons found in S-Madagascar and Australia. In the Bahamas, these deposits have been [...]


Amin Shoari Nejad, Andrew Parnell, Alice Greene, et al.

Published: 2020-05-28
Subjects: Applied Statistics, Climate, Earth Sciences, Life Sciences, Oceanography and Atmospheric Sciences and Meteorology, Other Earth Sciences, Other Life Sciences, Physical Sciences and Mathematics, Planetary Sciences, Statistics and Probability

We analysed tide gauges at Dublin port and its environs over the period 1938-2018. With three different tide gauges in the vicinity of the main Dublin port gauge, we merged the data sets and validated them against each other. The recordings of all four tide gauges were found to be in good agreement between 2003-2015, though this was markedly less so from 2016 to the present. We estimate the sea [...]

Identification of Hydrologic Landscapes in Brazilian basins and its application as indicator of water yield and storage

Matheus Henrique Mortene, Ronalton Evandro Machado

Published: 2020-04-09
Subjects: Civil and Environmental Engineering, Engineering, Environmental Studies, Life Sciences, Other Civil and Environmental Engineering, Other Life Sciences, Social and Behavioral Sciences

This study aimed to use the Hydrologic Landscapes as environmental classification method in the Piracicaba, Capivari and Jundiaí river basins, validate and use it as an indicator of water yield and storage areas. The method comprises in the same Information Plan (IP) factors that interact with the hydrological cycle in its terrestrial phase. The state of São Paulo, where most of the area is [...]

Northern peatland depth and lateral expansion is inconsistent with a 1055 GtC estimate of carbon storage

Joshua Lee Ratcliffe, Haijun Peng, Jelmer Nijp, et al.

Published: 2020-03-04
Subjects: Life Sciences, Other Life Sciences

Peatlands contain one of the largest stores of terrestrial carbon and exert a considerable influence on the global climate cycle. However, both the magnitude of the peatland carbon pool and the development of this pool through time are poorly constrained. In a recently published article, Nichols and Peteet combine basal radiocarbon dates from palaeoecological studies with previously published [...]

Machine learning for digital soil mapping: applications, challenges and suggested solutions

Alexandre Wadoux, Budiman Minasny, Alex McBratney

Published: 2020-02-06
Subjects: Agriculture, Life Sciences, Other Life Sciences

The uptake of machine learning (ML) algorithms in digital soil mapping (DSM) is transforming the way soil scientists produce their maps. Machine learning is currently applied to mapping soil properties or classes much in the same way as other unrelated fields of science. Mapping of soil, however, has unique aspects which require adaptations of the ML algorithms. These features are for example, [...]

serac: a R package for ShortlivEd RAdionuclide Chronology of recent sediment cores

Rosalie Bruel, Pierre Sabatier

Published: 2020-01-18
Subjects: Life Sciences, Other Life Sciences

Short-lived radionuclides are measured in surface sediment to provide a geochronology for the past century. Age-depth models can be produced from 210Pbex activity-derived sedimentation rates and confirmed by 137Cs and 241Am activities that are result of fallout from nuclear weapon tests and the Chernobyl accident. Different methods of age depth modelling using such data require expertise in lake [...]

The environmental impacts of palm oil in context

Erik Meijaard, Thomas Brooks, Kimberly Carlson, et al.

Published: 2020-01-10
Subjects: Agriculture, Ecology and Evolutionary Biology, Food Science, Life Sciences, Other Food Science, Other Life Sciences, Terrestrial and Aquatic Ecology

Delivering the Sustainable Development Goals (SDGs) requires balancing demands on land between agriculture (SDG 2) and biodiversity (SDG 15). The production of vegetable oils in general, and palm oil in particular, is perhaps the most controversial illustration of these trade-offs. Global annual demand for vegetable oil for food, animal feed and fuel is currently at 210 million tons1 (Mt), with [...]

The first climate tipping point – Already in the past?

Jorgen Randers, Ulrich Goluke

Published: 2020-01-03
Subjects: Life Sciences, Other Life Sciences

Humanity may have passed its first climate tipping point and face self-sustained melting of the permafrost for hundreds of years even if all man-made GHG emissions are stopped.

Enriching the historical meteorological information using Romanian newspaper reports

Sorin Cheval, Aritina Haliuc, Bogdan Antonescu, et al.

Published: 2019-09-17
Subjects: Life Sciences, Other Life Sciences

This study presents the meteorological information spanning the last two decades of the end of 19th century (1880-1900) extracted from three Romanian newspapers (România Liberă, Gazeta de Transilvania and Foaia Poporului). It describes the characteristics of the newspaper data included in the database, it offers and overview of the meteorological network and climate picture at that time in [...]

More than planetary-scale feedback self-regulation: A Biological-centred approach to the Gaia Hypothesis

Sergio C Rubin, Michel Crucifix

Published: 2019-08-15
Subjects: Life Sciences, Other Life Sciences

Recent appraisals of the Gaia theory tend to focus on the claim that planetary life is a cybernetic regulator that would self-regulate Earth’s chemistry composition and climate dynamics, following either a weak (biotic and physical processes create feedback loops), or a strong (biological activity control and regulates the physical processes) interpretation of the Gaia hypothesis. Here, we [...]

Decentralized Flood Forecasting Using Deep Neural Networks

Muhammed Ali Sit, Ibrahim Demir

Published: 2019-06-22
Subjects: Civil and Environmental Engineering, Engineering, Environmental Engineering, Life Sciences, Other Life Sciences

Predicting flood for any location at times of extreme storms is a longstanding problem that has utmost importance in emergency management. Conventional methods that aim to predict water levels in streams use advanced hydrological models still lack of giving accurate forecasts everywhere. This study aims to explore artificial deep neural networks performance on flood prediction. While providing [...]

Fish species classification in underwater video monitoring using Convolutional Neural Networks

Frederik Kratzert, Helmut Mader

Published: 2018-05-15
Subjects: Animal Sciences, Aquaculture and Fisheries Life Sciences, Computer Sciences, Environmental Monitoring, Environmental Sciences, Life Sciences, Other Life Sciences, Physical Sciences and Mathematics, Software Engineering

This report presents a case study for automatic fish species classification in underwater video monitoring of fish passes. Although the presented approach is based on the FishCam monitoring system, it can be used with any video-based monitoring system. The presented classification scheme in this study, is based on Convolutional Neural Networks that do not require the calculation of any [...]

Marine and freshwater micropearls: Biomineralization producing strontium-rich amorphous calcium carbonate inclusions is widespread in the genus Tetraselmis (Chlorophyta)

Agathe Martignier, Montserrat Filella, Kilian Pollok, et al.

Published: 2018-04-21
Subjects: Life Sciences, Other Life Sciences

The genus Tetraselmis (Chlorophyta) includes more than 30 species of unicellular micro-algae that have been widely studied since the description of the first species in 1878. Tetraselmis cordiformis (presumably the only freshwater species of the genus) was discovered recently to form intracellular mineral inclusions, called micropearls, which had been previously overlooked. These non-skeletal [...]

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