Mark Skidmore
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View article: Dynamic subglacial meltwater history archived in Antarctic subglacial lake sediments
Dynamic subglacial meltwater history archived in Antarctic subglacial lake sediments Open
There is a paucity of records on decadal to millennial scales archiving the evolution of the Antarctic subglacial hydrologic system, leaving a gap in our knowledge of the links between meltwater drainage and ice behavior. We employed a sui…
View article: Tropical Cyclone Day-off Orders, Warnings, and Avoidance Behavior
Tropical Cyclone Day-off Orders, Warnings, and Avoidance Behavior Open
Tropical cyclones, also known as hurricanes and typhoons, cause fatalities and significant economic losses every year. Alarms, warnings, and mandatory orders from governments play a crucial role in helping people avoid the harmful impacts …
View article: Ocean circulation, sea ice, and productivity simulated in Jones Sound, Canadian Arctic Archipelago, between 2003–2016
Ocean circulation, sea ice, and productivity simulated in Jones Sound, Canadian Arctic Archipelago, between 2003–2016 Open
Jones Sound is one of three critical waterways that regulate liquid exchange between the Arctic and northern Atlantic Oceans within the Canadian Arctic Archipelago. However, to date, no high-resolution ocean circulation model exists to stu…
View article: Modeling saline-fluid flow through subglacial channels
Modeling saline-fluid flow through subglacial channels Open
Subglacial hydrological systems impact ice dynamics, biological environments, and sediment transport. Previous numerical models of channelized subglacial flow have focused on freshwater in temperate ice without considering variable fluid c…
View article: Characterizing sub-glacial hydrology using radar simulations
Characterizing sub-glacial hydrology using radar simulations Open
The structure and distribution of sub-glacial water directly influences Antarctic ice mass loss by reducing or enhancing basal shear stress and accelerating grounding line retreat. A common technique for detecting sub-glacial water involve…
View article: Exploring Canyons Beneath Devon Ice Cap for Sub-Glacial Drainage Using Radar and Thermodynamic Modeling
Exploring Canyons Beneath Devon Ice Cap for Sub-Glacial Drainage Using Radar and Thermodynamic Modeling Open
Sub-glacial canyon features up to 580m deep between broad, flat mesas were identified beneath Devon Ice Cap, Devon Island, Nunavut, Canada during a recent Radar Echo Sounding (RES) survey. The largest canyon connects a hypothesized area of…
View article: Exploring canyons beneath Devon Ice Cap for sub-glacial drainage using radar and thermodynamic modeling
Exploring canyons beneath Devon Ice Cap for sub-glacial drainage using radar and thermodynamic modeling Open
Sub-glacial canyon features up to 580 m deep between flat terraces were identified beneath Devon Ice Cap during a 2023 radar echo sounding (RES) survey. The largest canyon connects a hypothesized brine network near the Devon Ice Cap summit…
View article: Comment on egusphere-2023-1685
Comment on egusphere-2023-1685 Open
Abstract. The structure and distribution of sub-glacial water directly influences Antarctic ice mass loss by reducing basal shear stress and enhancing grounding line retreat. A common technique for detecting sub-glacial water involves anal…
View article: Comment on egusphere-2023-1685
Comment on egusphere-2023-1685 Open
Abstract. The structure and distribution of sub-glacial water directly influences Antarctic ice mass loss by reducing basal shear stress and enhancing grounding line retreat. A common technique for detecting sub-glacial water involves anal…
View article: A Simulation Approach to Characterizing Sub-Glacial Hydrology
A Simulation Approach to Characterizing Sub-Glacial Hydrology Open
The structure and distribution of sub-glacial water directly influences Antarctic ice mass loss by reducing basal shear stress and enhancing grounding line retreat. A common technique for detecting sub-glacial water involves analyzing the …
View article: The Impact of Wildfires and Wildfire-Induced Air Pollution on House Prices in the United States
The Impact of Wildfires and Wildfire-Induced Air Pollution on House Prices in the United States Open
We investigate the direct impact of wildfires on house prices as well as the indirect impact of wildfires through fine particulate matter (PM2.5) in the United States. We find that wildfires, particularly those occurring at a distance, hav…
View article: Biogeochemical evolution of ponded meltwater in a High Arctic subglacial tunnel
Biogeochemical evolution of ponded meltwater in a High Arctic subglacial tunnel Open
Subglacial environments comprise ∼10 % of Earth's land surface, host active microbial ecosystems, and are important components of global biogeochemical cycles. However, the broadly inaccessible nature of subglacial systems has left them va…
View article: Supporting Data: A Simulation Approach to Characterizing Sub-Glacial Hydrology
Supporting Data: A Simulation Approach to Characterizing Sub-Glacial Hydrology Open
Raw data from "A Simulation Approach to Characterizing Sub-Glacial Hydrology". Actual IPR data for THW2_UBH0c_X243a are contained in file X243a_rad_data_foc.csv. Metadata are as follows: pst: flight line name long: observation longitude in…
View article: Supporting Data: Characterizing Sub-Glacial Hydrology Using Radar Simulations
Supporting Data: Characterizing Sub-Glacial Hydrology Using Radar Simulations Open
Raw data from "A Simulation Approach to Characterizing Sub-Glacial Hydrology". THW2_UBH0c_X243a.M1D1 is the 1 dimensionally focused, high gain radargram from the IPR radar survey. Actual along-track IPR pick data for THW2_UBH0c_X243a are c…
View article: Supporting Data: Characterizing Sub-Glacial Hydrology Using Radar Simulations
Supporting Data: Characterizing Sub-Glacial Hydrology Using Radar Simulations Open
Raw data from "A Simulation Approach to Characterizing Sub-Glacial Hydrology". THW2_UBH0c_X243a.M1D1 is the 1 dimensionally focused, high gain radargram from the IPR radar survey. Actual along-track IPR pick data for THW2_UBH0c_X243a are c…
View article: Comment on egusphere-2023-792
Comment on egusphere-2023-792 Open
Abstract. Subglacial hydrological systems have impacts on ice dynamics, as well as, nutrient and sediment transport. There has been extensive effort to understand the dynamics of subglacial drainage through numerical modeling. These models…
View article: Comment on egusphere-2023-792
Comment on egusphere-2023-792 Open
Abstract. Subglacial hydrological systems have impacts on ice dynamics, as well as, nutrient and sediment transport. There has been extensive effort to understand the dynamics of subglacial drainage through numerical modeling. These models…
View article: Trace element, rare earth element and trace carbon compounds in Subglacial Lake Whillans, West Antarctica
Trace element, rare earth element and trace carbon compounds in Subglacial Lake Whillans, West Antarctica Open
Whillans Subglacial Lake (SLW) lies beneath 801 m of ice in the lower portion of the Whillans Ice Stream (WIS) in West Antarctica and is part of an extensive and active subglacial drainage network. Here, the geochemical characterization of…
View article: Modeling saline fluid flow through subglacial ice-walled channels and the impact of density on fluid flux
Modeling saline fluid flow through subglacial ice-walled channels and the impact of density on fluid flux Open
Subglacial hydrological systems have impacts on ice dynamics, as well as, nutrient and sediment transport. There has been extensive effort to understand the dynamics of subglacial drainage through numerical modeling. These models, however,…
View article: Subglacial brine flow
Subglacial brine flow Open
We adapted a subglacial hydrology model to account for saline fluid below the pressure melting point. Model code is written in MATLAB. The main model is called subglacial_brine_flow.m and is run by run_subglacial_brine_flow.m.
View article: Subglacial brine flow
Subglacial brine flow Open
We adapted a subglacial hydrology model to account for saline fluid below the pressure melting point. Model code is written in MATLAB. The main model is called subglacial_brine_flow.m and is run by run_subglacial_brine_flow.m.
View article: Comment on tc-2022-240
Comment on tc-2022-240 Open
Abstract. Subglacial environments comprise ~10 % of Earth’s land surface, host active microbial ecosystems, and are important components of global biogeochemical cycles. However, the broadly inaccessible nature of subglacial systems has le…
View article: The life and death of a subglacial lake in West Antarctica
The life and death of a subglacial lake in West Antarctica Open
Over the past 50 years, the discovery and initial investigation of subglacial lakes in Antarctica have highlighted the paleoglaciological information that may be recorded in sediments at their beds. In December 2018, we accessed Mercer Sub…
View article: Abrasion of sedimentary rocks as a source of hydrogen peroxide and nutrients to subglacial ecosystems
Abrasion of sedimentary rocks as a source of hydrogen peroxide and nutrients to subglacial ecosystems Open
Glaciers and ice sheets are renowned for their abrasive power, yet little is known of the mechanochemical reactions which are initiated by abrasion in these environments and their effect on subglacial biogeochemistry. Here, we use sediment…
View article: Biogeochemical evolution of ponded meltwater in a High Arctic subglacial tunnel
Biogeochemical evolution of ponded meltwater in a High Arctic subglacial tunnel Open
Subglacial environments comprise ~10 % of Earth’s land surface, host active microbial ecosystems, and are important components of global biogeochemical cycles. However, the broadly inaccessible nature of subglacial systems has left them va…
View article: Data for Siegfried*, Venturelli*, et al., 2023, Geology
Data for Siegfried*, Venturelli*, et al., 2023, Geology Open
Datasets used in Siegfried*, Venturelli*, et al. (2023). The life and death of a subglacial lake in West Antarctica, Geology, doi: 10.1130/G50995.1. See top-level readme.md file for more information about the types of data and datasets con…
View article: Data for Siegfried*, Venturelli*, et al., 2023, Geology
Data for Siegfried*, Venturelli*, et al., 2023, Geology Open
Datasets used in Siegfried*, Venturelli*, et al. (2023). The life and death of a subglacial lake in West Antarctica, Geology, doi: 10.1130/G50995.1. See top-level readme.md file for more information about the types of data and datasets con…
View article: Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica
Biogeochemical and historical drivers of microbial community composition and structure in sediments from Mercer Subglacial Lake, West Antarctica Open
Ice streams that flow into Ross Ice Shelf are underlain by water-saturated sediments, a dynamic hydrological system, and subglacial lakes that intermittently discharge water downstream across grounding zones of West Antarctic Ice Sheet (WA…