Water temperature dynamics in High Arctic river basins

Despite the high sensitivity of polar regions to climate change and the strong influence of temperature upon ecosystem processes, contemporary understanding of water temperature dynamics in Arctic river systems is limited. This research gap was addressed by exploring high-resolution water column thermal regimes for glacier-fed and non-glacial rivers at eight sites across Svalbard during the 2010 melt season. Mean water column temperatures in glacier-fed rivers (0.3-3.2 °C) were lowest and least variable near the glacier terminus but increased downstream (0.7-2.3 °C km ). Non-glacial rivers, where discharge was sourced primarily from snowmelt runoff, were warmer (mean: 2.9-5.7 °C) and more variable, indicating increased water residence times in shallow alluvial zones and increased potential for atmospheric influence. Mean summer water temperature and the magnitude of daily thermal variation were similar to those of some Alaskan Arctic rivers but low at all sites when compared with alpine glacierized environments at lower latitudes. Thermal regimes were correlated strongly (p<0.01) with incoming short-wave radiation, air temperature, and river discharge. Principal drivers of thermal variability were inferred to be (i) water source (i.e. glacier melt, snowmelt, groundwater); (ii) exposure time to the atmosphere; (iii) prevailing meteorological conditions; (iv) river discharge; (v) runoff interaction with permafrost and buried ice; and (vi) basin-specific geomorphological features (e.g. channel morphology). These results provide insight into the potential changes in high-latitude river systems in the context of projected warming in polar regions. We hypothesize that warmer and more variable temperature regimes may prevail in the future as the proportion of bulk discharge sourced from glacial meltwater declines and rivers undergo a progressive shift towards snow water and groundwater sources. Importantly, such changes could have implications for aquatic species diversity and abundance and influence rates of ecosystem functioning in high-latitude river systems

Hydroecological response of arctic rivers to climate change

Although the Arctic is one of the most vulnerable regions to climate change, links between hydrology and ecology in high-latitude northern river basins are not well understood. Interdisciplinary research over three summer melt seasons (2010 to 2012) in the Kongsfjorden area of northwest Svalbard identified process connections between conceptual water sources, physicochemical habitat, and ecological structure and functioning in river basins. Water source dynamics determined from hydrochemical and isotopic data indicated differences in meltwater and groundwater contributions to river flow which varied both spatially and temporally at seasonal and year-to-year timescales. Non-glacier-fed rivers were characterised by less variable flow regimes, warmer water temperature, lower suspended sediment concentration and more stable channel morphologies. Several physicochemical habitat variables, notably water temperature and channel stability, were related significantly to rates of nutrient uptake and macroinvertebrate community structure. These data suggest that a future shift towards groundwater-dominated flow regimes may increase biotic diversity and rates of nutrient cycling in some high-latitude rivers. Key research findings are synthesised in conceptual models and provide a framework to understand the hydroecological response of these Arctic river systems to climate change

The Theory and Practice of Comic Sexual Euphemism: A Comparative Study of English and French Renaissance Texts

This thesis is on the theory and practice of comic sexual euphemism in Renaissance France and England. The term ‘comic sexual euphemism’ means the use of non-literal descriptions for sexual topics for the purposes of comedy, similar to an innuendo or double-entendre. Crucially, instances are often more explicit than straightforward literal statement, so fail to be euphemistic. I use ancient, early modern, and modern theory, as well as my own theoretical insights, and apply this to three types of Renaissance text: texts associated with the court from England and France, medical texts from France and their English translation, and theatre from England and France. Primary authors include Baldesar Castiglione, Pierre de Brantôme, Sir John Harington (who translated Ludovico Ariosto into English – Ariosto is also translated into French by Jean Martin), Laurent Joubert, Jacques Ferrand (translated into English by Edmund Chilmead), Thomas Middleton, Ben Jonson, Edward Sharpham, John Marston, and Pierre de Troterel. At the court of both countries a dangerous line was walked between protecting women and gossiping about them, between proving yourself witty regarding sexual material and going too far. In the world of French medicine, where you might expect professional and clinical language, there is instead a trend towards outrageous sexual humour. As at court, if deemed to have exceeded social norms, this could get writers into trouble. The stage was in some ways a safer environment in which to use comic sexual euphemism, as it was expected more in comic drama. This does not, however, lessen how vibrant and multi-faceted such language could be in early modern drama. Interestingly, similar imagery is found across texts and genres. In this period overall there was a tension between the rhetorical rules which forbid the discussion of the sexually obscene and the clear delight writers took in breaking these.AHR

A distributed heat pulse sensor network for thermo-hydraulic monitoring of the soil subsurface

Fibre optic distributed temperature sensing (DTS) is used increasingly for environmental monitoring and subsurface characterization. Combined with heating of metal elements embedded within the fibre optic cable, the temperature response of the soil provides valuable information from which soil parameters such as thermal conductivity and soil moisture can be derived at high spatial and temporal resolution, and over long distances. We present a novel active distributed temperature sensing (A-DTS) system and its application to characterize spatial and temporal dynamics in soil thermal conductivity along a recently forested hillslope in Central England, UK. Compared with conventional techniques (needle probe surveys), A-DTS provided values with a similar spread although lower on average. The larger number of measurement points that A-DTS provides at higher spatial and temporal resolutions and the ability to repeat surveys under different meteorological or hydrological conditions allow for a more detailed examination of the spatial and temporal variability of thermal conductivities at the study site. Although system deployment time and costs are higher than with needle probes, A-DTS can be extremely appealing for applications requiring long-term monitoring, at high temporal repeatability, over long (kilometres) distances and with minimum soil disturbance, compared with one-off spatial surveys

Author Correction:Transformation of organic micropollutants along hyporheic flow in bedforms of river-simulating flumes

Correction to: Scientific Reports https://doi.org/10.1038/s41598-021-91519-2, published online 22 June 202

Long-term variability of proglacial groundwater-fed hydrological systems in an area of glacier retreat, Skeioararsandur, Iceland

Proglacial groundwater‐fed features, such as seeps, substantially impact proglacial geomorphology, hydrology, and ecology. However, there is a paucity of research on the impacts of climate change and glacier retreat on the extent of these important features. This paper aims to investigate the impact of glacier retreat on proglacial groundwater levels and on the extent of groundwater‐fed seeps. Research has taken place in western Skeiðarársandur, the large proglacial outwash plain of Skeiðarárjökull, a retreating temperate glacier in southeast Iceland. Changes in the extent of proglacial groundwater seeps were mapped using historical aerial photographs from 1986, 1997, and 2012. Proglacial groundwater levels were monitored in shallow boreholes between 2000 and 2012. The western margin of Skeiðarárjökull has retreated approximately 1 km beyond its position in 1986. However, this retreat was punctuated by short periods of readvance. The geomorphology and groundwater systems at the site were substantially impacted by the November 1996 jökulhlaup, whose deposits altered approximately 18% of the area of groundwater seeps. The surface areas of groundwater seeps and lakes in the study area have declined by ~97% between 1986 and 2012. Most of the decline took place after 1997, when the mean annual rate of retreat increased three‐fold. Groundwater levels also declined substantially between 2000 and 2012, although this trend varies spatially. The paper provides a conceptual model of the controls on proglacial shallow groundwater systems. Direct impacts of glacier retreat are suggested as the main cause for the declines in proglacial groundwater levels and in the extent of groundwater seeps. These declines are expected to adversely impact sandur ecology

Functional diversity and community assembly of river invertebrates show globally consistent responses to decreasing glacier cover

Global change threatens invertebrate biodiversity and its central role in numerous ecosystem functions and services. Functional trait analyses have been advocated to uncover global mechanisms behind biodiversity responses to environmental change, but the application of this approach for invertebrates is underdeveloped relative to other organism groups. From an evaluation of 363 records comprising >1.23 million invertebrates collected from rivers across nine biogeographic regions on three continents, consistent responses of community trait composition and diversity to replicated gradients of reduced glacier cover are demonstrated. After accounting for a systematic regional effect of latitude, the processes shaping river invertebrate functional diversity are globally consistent. Analyses nested within individual regions identified an increase in functional diversity as glacier cover decreases. Community assembly models demonstrated that dispersal limitation was the dominant process underlying these patterns, although environmental filtering was also evident in highly glacierized basins. These findings indicate that predictable mechanisms govern river invertebrate community responses to decreasing glacier cover globally.This work was funded by the following organisations: The UK Natural Environment Research Council grants and studentships GR9/2913, NE/E003729/1, NE/E004539/1, NE/E004148/1, 20 NE/G523963/1, NER/S/A/2003/11192, and NE/L002574/1; the European Union Environment and Climate Programme Arctic and Alpine Stream Ecosystem Research (AASER) project (ENV-CT95-0164); EU-FP7 Assessing Climate impacts on the Quality and quantity of WAter (ACQWA) project (212250); Icelandic Research Council (954890095, 954890096); University of Iceland Research Fund (GMG96, GMG97, GMG98), Wyoming Center for Environmental Hydrology and Geophysics-National Science Foundation (1208909); USA-Wyoming NASA Space Grant Faculty Research Initiation (#NNX10A095H); USA-NSF Wyoming Epscor; Nationalpark Hohe Tauern, Austria; the Royal Society (International Outgoing Grant 2006/R4); the Leverhulme Trust; the Universities of Leeds, Birmingham, Iceland and Innsbruck; European Centre for Arctic Environmental Research (ARCFAC): a Research Infrastructures Action of the European Community FP6 (026129-2008- 72); the Stelvio National Park (2000-2001); the Autonomous Province of Trento (HIGHEST project, 2001-2004, del. PAT n. 1060/2001; VETTA project, 2003-2006, del. PAT n. 3402/2002); MUSE-Museo delle Scienze. We are grateful to Russell Taylor and Mike Winterbourn at the University of Canterbury, NZ, who helped to collect NZ invertebrate data and assisted with identification, and to Hakon Adalsteinsson who contributed to data collection in Iceland. Many other people, too numerous to mention, assisted with fieldwork at all of the study locations. The European Science Foundation sponsored an exploratory ┘ﾗヴﾆゲｴﾗヮ WﾐデｷデﾉWS さGﾉ;IｷWヴ-fed rivers, hydroecology and climate change: current knowledge and future network of monitoring sites (GLAC-HYDROECO-NETぶざ デｴ;デ ┘;ゲ ｴWﾉS ｷﾐ Birmingham, UK in September of 2013 where some of the ideas in this paper were first discussedPeer Reviewe

Former metal mining landscapes in England and Wales: Five perspectives from local residents

This study uses Q Method to examine how those living in former metal mining landscapes value this heritage and their preferences for the long-term management of abandoned mine waste. There are around 5000 former metal mines in England and Wales, many of which are protected for their ecological, geological or cultural value. Q Method is used to examine subjective viewpoints, in this study we asked 38 residents of six mining areas in England and Wales to ‘sort’ a series of statements based on their resonance with the resident's perspective. The statements covered a range of opinions of the mining legacy, its value and options for its management. This was supplemented with a qualitative questionnaire including their willingness to pay to manage the mining heritage in the long-term. Analysis revealed five perspectives on the mining heritage and differing priorities for long-term management. Preservationists felt the mines should be left alone to preserve the cultural heritage, whereas Nature enthusiasts, Environmentalists and Landscape lovers placed different emphasis on restoring the sites for nature conservation, to improve water quality or the visual appearance of the mines. In contrast the Industry supporters felt the potential contribution that reworking the mines could make to the local economy should be the priority. This research suggests that the views of local people are varied; they value their mining heritage in different ways and opinion is split on the most effective way to manage these sites especially where there is a need to revegetate or remediate the site