Michael N. Gooseff 2022-06-23 tabular digitial data McMurdo Dry Valleys LTER McMurdo Dry Valleys LTER 10.6073/pasta/543b6cda26fce00695bb4fca666f8107 https://mcm.lternet.edu/content/continuous-soil-temperature-specific-conductance-and-volumetric-water-content-measurements-1 As part of the McMurdo Dry Valleys Long Term Ecological Research (LTER) project, five Active Layer Monitoring Stations (ALMSs) were established throughout Taylor Valley, Antarctica to support new research foci around the thermal-moisture dynamics of soils that may control habitat conditions and faunal responses to seasonal and annual freezing cycles in this ecosystem. Two ALMSs were established adjacent to streams (Green Creek, Von Guerard Stream), with sensors installed through the active layer from the thalweg out to the shoreline and dry soil beyond. Two ALMSs were similarly established adjacent to water tracks (Wormherder Creek, Water Track B) that are zero-order drainages of snow and ice melt that rarely have surface flow. The remaining station was established in dry soil (F6) to serve as an ambient control. ALMSs measure soil temperature, soil moisture (as volumetric water content; VWC), and specific conductance (as electrical conductivity; EC) through the active layer (soil surface down to the frost table) at several locations from the water’s edge to dry soils. This data package contains measurements from the Active Layer Monitoring Station at Von Guerard Stream (ALMS03). Funding for this project was provided by several grants from the US National Science Foundation for Long Term Ecological Research, most recently under award #OPP-1637708. 2014-01-12 2021-11-23 ground condition As needed Coordinates provided by Mike Gooseff in October 2020. 163.254733300000 163.254733300000 -77.609166700000 -77.609166700000 LTER Core Areas disturbance None <cntperp> <cntper>McMurdo Dry Valleys LTER Information Manager</cntper> </cntperp> <cntemail>im@mcmlter.org</cntemail> Name: Joel G. Singley Role: associated researcher Name: Adam Wlostowski Role: associated researcher Name: Renée F. Brown Role: data manager Not Applicable Not Applicable Field and/or Lab Methods Active Layer Monitoring Stations (ALMSs) are designed to measure soil temperature, soil moisture (as volumetric water content; VWC), and specific conductance (as electrical conductivity; EC) of active layer soils at various depths. At each station, sensors are deployed at 4-5 sites (A-E) in a 1-dimensional vertical orientation. For example, at Green Creek, sites A and B are located near the thalweg, site C is located at the wetted margin, and sites D and E are located in distal soils further from the channel of the stream. Decagon 5TE sensors are used to measure soil temperature, volumetric water content, and pore water electrical conductivity at specific depths in the soil profile. Each 5TE sensor is wired into a Campbell Scientific AM16/32B 16-Channel Relay Multiplexer, which is connected to a CR1000 Measurement and Control Datalogger. In very dry soils, specific conductance measurements may be unreliable. Furthermore, specific conductance observations in frozen soils are also unreliable. To interpret these data, we suggest looking at coincidentally observed temperature and soil moisture observations. Pore water specific electrical conductivity is measured with an accuracy of 10% and resolution of 0.01 dS/m. Notably, VWC is not calibrated for each sensor so relative changes should only be considered and care should be taken when comparing values between sensors. K-Type, Duplex Insulated Omega® Thermocouple Wire was cut and insulated at one end to measure soil temperature at several additional depths within each site at each station to complement temperature data recorded by the 5TE sensors. Thermocouples are wired into a Campbell Scientific AM25T 25-Channel Solid-State Thermocouple Multiplexer, connected to a CR1000 Datalogger. Thermocouples measure temperature within a range of -250 to +250°C, at an accuracy of 2% below freezing and 0.75% above freezing, and a precision of 0.001 °C. Quality Control: These data have not been QA/QC'd, so erroneous values exist, especially in the EC and VWC datasets. These data have not been gap filled so there are missing measurements for particular sensors (indicated by blank cells) as well as missing timestamp values (these entire rows do not exist). A data gap exists from 2020-01-14 17:00 to 2020-06-17 22:00 due to overwriting that occurred when the datalogger memory filled. Active Layer Monitoring Stations (ALMSs) are designed to measure soil temperature, soil moisture (as volumetric water content; VWC), and specific conductance (as electrical conductivity; EC) of active layer soils at various depths. At each station, sensors are deployed at 4-5 sites (A-E) in a 1-dimensional vertical orientation. For example, at Green Creek, sites A and B are located near the thalweg, site C is located at the wetted margin, and sites D and E are located in distal soils further from the channel of the stream.Decagon 5TE sensors are used to measure soil temperature, volumetric water content, and pore water electrical conductivity at specific depths in the soil profile. Each 5TE sensor is wired into a Campbell Scientific AM16/32B 16-Channel Relay Multiplexer, which is connected to a CR1000 Measurement and Control Datalogger. In very dry soils, specific conductance measurements may be unreliable. Furthermore, specific conductance observations in frozen soils are also unreliable. To interpret these data, we suggest looking at coincidentally observed temperature and soil moisture observations. Pore water specific electrical conductivity is measured with an accuracy of 10% and resolution of 0.01 dS/m. Notably, VWC is not calibrated for each sensor so relative changes should only be considered and care should be taken when comparing values between sensors.K-Type, Duplex Insulated Omega® Thermocouple Wire was cut and insulated at one end to measure soil temperature at several additional depths within each site at each station to complement temperature data recorded by the 5TE sensors. Thermocouples are wired into a Campbell Scientific AM25T 25-Channel Solid-State Thermocouple Multiplexer, connected to a CR1000 Datalogger. Thermocouples measure temperature within a range of -250 to +250°C, at an accuracy of 2% below freezing and 0.75% above freezing, and a precision of 0.001 °C. unknown ALMS03_VG_EC ALMS03 at VG - Soil Specific Conductance Dataset code Internal dataset code. The data provider Internal dataset code. Timestamp Date and time measurement was recorded in NZDT (GMT+13). The data provider calendar date/time YYYY-MM-DD HH:MM:SS gregorian calendar Station code The station code associated with this ALMS. The data provider The station code associated with this ALMS. Location name The location of this ALMS. The data provider The location of this ALMS. Measurement type Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. The data provider Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter a_35cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter b_33cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter c_35cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider milliSiemensPerCentimeter McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms03_vg-ec-20220622.csv None ALMS03_VG_TEMP ALMS03 at VG - Soil Temperature Dataset code Internal dataset code. The data provider Internal dataset code. Timestamp Date and time measurement was recorded in NZDT (GMT+13). The data provider calendar date/time YYYY-MM-DD HH:MM:SS gregorian calendar Station code The station code associated with this ALMS. The data provider The station code associated with this ALMS. Location name The location of this ALMS. The data provider The location of this ALMS. Measurement type Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. The data provider Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. a_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_35cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius a_40cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius b_33cm b_33cm The data provider celsius b_40cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_35cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius c_40cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_40cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_50cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius d_60cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius e_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius e_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius e_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider celsius McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms03_vg-temp-20220622.csv None ALMS03_VG_VWC ALMS03 at VG - Soil Volumetric Water Content Dataset code Internal dataset code. The data provider Internal dataset code. Timestamp Date and time measurement was recorded in NZDT (GMT+13). The data provider calendar date/time YYYY-MM-DD HH:MM:SS gregorian calendar Station code The station code associated with this ALMS. The data provider The station code associated with this ALMS. Location name The location of this ALMS. The data provider The location of this ALMS. Measurement type Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. The data provider Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent a_35cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent b_33cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent c_35cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. The data provider percent McMurdo Dry Valleys LTER The data distributor shall not be liable for innacuracies in the content http 1 0 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms03_vg-vwc-20220622.csv None 2022-06-23 2022-06-23 McMurdo Dry Valleys LTER http://mcmlter.org/ Biological Data Profile of the Content Standards for Digital Geospatial Metadata devised by the Federal Geographic Data Committee. Drupal Ecological information Management Systems, version D7, Biological Data Profile module