Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic,tectonic and man-induced forcings at the centennial/millennial timescales. On the one hand, the scientific community has recently explored the potential of palaeo-)dosimetric methods to trace sediment dynamics. Luminescence and ESR signals, which were extensively used to date e.g. Quaternary alluvial environments, have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. On the other hand, the geomorphometric index of connectivity has been growingly used over the last decade to quantitatively assess catchmentscalehydrosedimentary connectivity.This contribution is part of the French ANR QUARTZ research project which aims to use quartz grains as an ubiquitous marker of sedimentary dynamics in order to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This contribution focuses on the second aim by combining measurements of luminescence and ESR signals with assessments of the index of catchment connectivity, and thereby highlights the promising potential of their coupling to quantitatively unravel source-to-sinksedimentary dynamics. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Vosges, E. France). It represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations (i.e. plutonic, metamorphic and sedimentary) and finally its simple geomorphic configuration allows representative computation of the index of connectivity(or dysconnectivity), not only along the main drain but also in each sub-catchment

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic,tectonic and man-induced forcings at the centennial/millennial timescales. On the one hand, the scientific community has recently explored the potential of palaeo-)dosimetric methods to trace sediment dynamics. Luminescence and ESR signals, which were extensively used to date e.g. Quaternary alluvial environments, have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. On the other hand, the geomorphometric index of connectivity has been growingly used over the last decade to quantitatively assess catchmentscalehydrosedimentary connectivity.This contribution is part of the French ANR QUARTZ research project which aims to use quartz grains as an ubiquitous marker of sedimentary dynamics in order to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This contribution focuses on the second aim by combining measurements of luminescence and ESR signals with assessments of the index of catchment connectivity, and thereby highlights the promising potential of their coupling to quantitatively unravel source-to-sinksedimentary dynamics. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Vosges, E. France). It represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations (i.e. plutonic, metamorphic and sedimentary) and finally its simple geomorphic configuration allows representative computation of the index of connectivity(or dysconnectivity), not only along the main drain but also in each sub-catchment

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic,tectonic and man-induced forcings at the centennial/millennial timescales. On the one hand, the scientific community has recently explored the potential of palaeo-)dosimetric methods to trace sediment dynamics. Luminescence and ESR signals, which were extensively used to date e.g. Quaternary alluvial environments, have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. On the other hand, the geomorphometric index of connectivity has been growingly used over the last decade to quantitatively assess catchmentscalehydrosedimentary connectivity.This contribution is part of the French ANR QUARTZ research project which aims to use quartz grains as an ubiquitous marker of sedimentary dynamics in order to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This contribution focuses on the second aim by combining measurements of luminescence and ESR signals with assessments of the index of catchment connectivity, and thereby highlights the promising potential of their coupling to quantitatively unravel source-to-sinksedimentary dynamics. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Vosges, E. France). It represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations (i.e. plutonic, metamorphic and sedimentary) and finally its simple geomorphic configuration allows representative computation of the index of connectivity(or dysconnectivity), not only along the main drain but also in each sub-catchment

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic,tectonic and man-induced forcings at the centennial/millennial timescales. On the one hand, the scientific community has recently explored the potential of palaeo-)dosimetric methods to trace sediment dynamics. Luminescence and ESR signals, which were extensively used to date e.g. Quaternary alluvial environments, have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. On the other hand, the geomorphometric index of connectivity has been growingly used over the last decade to quantitatively assess catchmentscalehydrosedimentary connectivity.This contribution is part of the French ANR QUARTZ research project which aims to use quartz grains as an ubiquitous marker of sedimentary dynamics in order to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This contribution focuses on the second aim by combining measurements of luminescence and ESR signals with assessments of the index of catchment connectivity, and thereby highlights the promising potential of their coupling to quantitatively unravel source-to-sinksedimentary dynamics. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Vosges, E. France). It represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations (i.e. plutonic, metamorphic and sedimentary) and finally its simple geomorphic configuration allows representative computation of the index of connectivity(or dysconnectivity), not only along the main drain but also in each sub-catchment

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic, tectonic and man-induced drivers at the centennial/millennial timescales. Among the various geomorphicical and geochemical approaches developed to trace sediment dynamics, the scientific community has recently explored the potential of (palaeo-)dosimetric methods, which are extensively used to date e.g. Quaternary alluvial environments. Recently, optically Stimulated luminescence (OSL) and Electron Spin Resonance (ESR) signals have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. In parallel, the index of connectivity has been growingly used to quantitatively assess catchment-scale hydrosedimentary connectivity over the last decade. Against this framework, the French ANR QUARTZ research project aims at using quartz grains as an ubiquitous marker of sedimentary dynamics to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This study specifically focuses on the second aim. Longitudinal measurements of OSL and ESR signals from modern river borne sediments are performed together with the assessment of the catchment-scale index of connectivity. It is argued here that coupling both information can help to quantitatively unravel source-to-sink sedimentary dynamics. More precisely, the longitudinal evolution of ESR and OSL residual doses in quartz sediments is reconstructed. Whilst a downstream decrease of residual doses is expected owing to increasing duration to light exposure with increasing transport distance, sediment inputs from tributaries can blur this signal. Here, this relation between bleaching evolution of quartz and sediments inputs is investigated via the index of connectivity. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Eastern France) as it represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations, i.e. plutonic, metamorphic and sedimentary. Finally, it displays a simple geomorphic configuration with (i) well-identified sources in the Vosges Mountains, (ii) a deeply-incised main valley with absence of significant intermediate storage (e.g. no terrace system) and (iii) a clear, single sink (Upper Rhine Graben). This allows representative computation of the index of connectivity (or dysconnectivity)

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic, tectonic and man-induced drivers at the centennial/millennial timescales. Among the various geomorphicical and geochemical approaches developed to trace sediment dynamics, the scientific community has recently explored the potential of (palaeo-)dosimetric methods, which are extensively used to date e.g. Quaternary alluvial environments. Recently, optically Stimulated luminescence (OSL) and Electron Spin Resonance (ESR) signals have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. In parallel, the index of connectivity has been growingly used to quantitatively assess catchment-scale hydrosedimentary connectivity over the last decade. Against this framework, the French ANR QUARTZ research project aims at using quartz grains as an ubiquitous marker of sedimentary dynamics to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This study specifically focuses on the second aim. Longitudinal measurements of OSL and ESR signals from modern river borne sediments are performed together with the assessment of the catchment-scale index of connectivity. It is argued here that coupling both information can help to quantitatively unravel source-to-sink sedimentary dynamics. More precisely, the longitudinal evolution of ESR and OSL residual doses in quartz sediments is reconstructed. Whilst a downstream decrease of residual doses is expected owing to increasing duration to light exposure with increasing transport distance, sediment inputs from tributaries can blur this signal. Here, this relation between bleaching evolution of quartz and sediments inputs is investigated via the index of connectivity. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Eastern France) as it represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations, i.e. plutonic, metamorphic and sedimentary. Finally, it displays a simple geomorphic configuration with (i) well-identified sources in the Vosges Mountains, (ii) a deeply-incised main valley with absence of significant intermediate storage (e.g. no terrace system) and (iii) a clear, single sink (Upper Rhine Graben). This allows representative computation of the index of connectivity (or dysconnectivity)

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic, tectonic and man-induced drivers at the centennial/millennial timescales. Among the various geomorphicical and geochemical approaches developed to trace sediment dynamics, the scientific community has recently explored the potential of (palaeo-)dosimetric methods, which are extensively used to date e.g. Quaternary alluvial environments. Recently, optically Stimulated luminescence (OSL) and Electron Spin Resonance (ESR) signals have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. In parallel, the index of connectivity has been growingly used to quantitatively assess catchment-scale hydrosedimentary connectivity over the last decade. Against this framework, the French ANR QUARTZ research project aims at using quartz grains as an ubiquitous marker of sedimentary dynamics to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This study specifically focuses on the second aim. Longitudinal measurements of OSL and ESR signals from modern river borne sediments are performed together with the assessment of the catchment-scale index of connectivity. It is argued here that coupling both information can help to quantitatively unravel source-to-sink sedimentary dynamics. More precisely, the longitudinal evolution of ESR and OSL residual doses in quartz sediments is reconstructed. Whilst a downstream decrease of residual doses is expected owing to increasing duration to light exposure with increasing transport distance, sediment inputs from tributaries can blur this signal. Here, this relation between bleaching evolution of quartz and sediments inputs is investigated via the index of connectivity. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Eastern France) as it represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations, i.e. plutonic, metamorphic and sedimentary. Finally, it displays a simple geomorphic configuration with (i) well-identified sources in the Vosges Mountains, (ii) a deeply-incised main valley with absence of significant intermediate storage (e.g. no terrace system) and (iii) a clear, single sink (Upper Rhine Graben). This allows representative computation of the index of connectivity (or dysconnectivity)

Coupling dosimetric methods (luminescence and ESR) with hydrosedimentary connectivity to unravel source-to-sink dynamics in the Strengbach catchment (Eastern France)

International audienceSediment routing systems in fluvial catchments are primarily governed by intertwined climatic, tectonic and man-induced drivers at the centennial/millennial timescales. Among the various geomorphicical and geochemical approaches developed to trace sediment dynamics, the scientific community has recently explored the potential of (palaeo-)dosimetric methods, which are extensively used to date e.g. Quaternary alluvial environments. Recently, optically Stimulated luminescence (OSL) and Electron Spin Resonance (ESR) signals have been successfully transposed to decipher sediment provenance and transport in fluvial catchments. In parallel, the index of connectivity has been growingly used to quantitatively assess catchment-scale hydrosedimentary connectivity over the last decade. Against this framework, the French ANR QUARTZ research project aims at using quartz grains as an ubiquitous marker of sedimentary dynamics to understand (i) how each quartz grain holds a source-specific signature, and (ii) how this signature evolves along sediment routing systems. This study specifically focuses on the second aim. Longitudinal measurements of OSL and ESR signals from modern river borne sediments are performed together with the assessment of the catchment-scale index of connectivity. It is argued here that coupling both information can help to quantitatively unravel source-to-sink sedimentary dynamics. More precisely, the longitudinal evolution of ESR and OSL residual doses in quartz sediments is reconstructed. Whilst a downstream decrease of residual doses is expected owing to increasing duration to light exposure with increasing transport distance, sediment inputs from tributaries can blur this signal. Here, this relation between bleaching evolution of quartz and sediments inputs is investigated via the index of connectivity. A first campaign was performed in the Strengbach catchment in the Vosges Mountains (Eastern France) as it represents an ideal natural laboratory. Firstly, the geochemical composition of the source materials has been studied for more than thirty years. Secondly, it contains various quartz-bearing formations, i.e. plutonic, metamorphic and sedimentary. Finally, it displays a simple geomorphic configuration with (i) well-identified sources in the Vosges Mountains, (ii) a deeply-incised main valley with absence of significant intermediate storage (e.g. no terrace system) and (iii) a clear, single sink (Upper Rhine Graben). This allows representative computation of the index of connectivity (or dysconnectivity)

Global impact of the COVID-19 pandemic on cytopathology practice: Results from an international survey of laboratories in 23 countries

Background To the authors' knowledge, the impact of the coronavirus disease 2019 (COVID-19) pandemic on cytopathology practices worldwide has not been investigated formally. In the current study, data from 41 respondents from 23 countries were reported. Methods Data regarding the activity of each cytopathology laboratory during 4 weeks of COVID-19 lockdown were collected and compared with those obtained during the corresponding period in 2019. The overall number and percentage of exfoliative and fine-needle aspiration cytology samples from each anatomic site were recorded. Differences in the malignancy and suspicious rates between the 2 periods were analyzed using a meta-analytical approach. Results Overall, the sample volume was lower compared with 2019 (104,319 samples vs 190,225 samples), with an average volume reduction of 45.3% (range, 0.1%-98.0%). The percentage of samples from the cervicovaginal tract, thyroid, and anorectal region was significantly reduced (P < .05). Conversely, the percentage of samples from the urinary tract, serous cavities, breast, lymph nodes, respiratory tract, salivary glands, central nervous system, gastrointestinal tract, pancreas, liver, and biliary tract increased (P < .05). An overall increase of 5.56% (95% CI, 3.77%-7.35%) in the malignancy rate in nongynecological samples during the COVID-19 pandemic was observed. When the suspicious category was included, the overall increase was 6.95% (95% CI, 4.63%-9.27%). Conclusions The COVID-19 pandemic resulted in a drastic reduction in the total number of cytology specimens regardless of anatomic site or specimen type. The rate of malignancy increased, reflecting the prioritization of patients with cancer who were considered to be at high risk. Prospective monitoring of the effect of delays in access to health services during the lockdown period is warranted