ALMS01_F6 English utf8 dataset McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact 2022-06-23 ISO 19115-2 Geographic Information - North American Profile Metadata - Data with Biological Extensions ISO 19115-2:2009(E) Continuous soil temperature, specific conductance, and volumetric water content measurements from the F6 Active Layer Monitoring Station (ALMS01), McMurdo Dry Valleys, Antarctica (2014-2021, ongoing) 2022-06-23 publication Michael Gooseff University of Colorado Boulder http://www.colorado.edu/ michael.gooseff@colorado.edu http://goosefflab.weebly.com pointOfContact documentDigital 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 F6 (ALMS01), located on the south shore of Lake Fryxell. Name: Joel G. Singley Role: associated researcher Name: Adam Wlostowski Role: associated researcher Name: Renée F. Brown Role: data manager completed McMurdo Dry Valleys LTER Information Manager im@mcmlter.org pointOfContact disturbance theme LTER Core Areas English Coordinates provided by Mike Gooseff in October 2020. 163.253066700000 163.253066700000 -77.608333300000 -77.608333300000 ground condition 2014-01-29 2021-12-01 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. https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-ec-20220622.csv ALMS01_F6_EC eng; US McMurdo Dry Valleys LTER ALMS01_F6_EC Data Source Definition : ALMS01 at F6 - Soil Specific Conductance Number of Header Lines : 1 Orientation : Column Field Delimiter : , false dataset_code Internal dataset code. date_time Date and time measurement was recorded in NZDT (GMT+13). Date Time Format: YYYY-MM-DD HH:MM:SS station The station code associated with this ALMS. location The location of this ALMS. measurement 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. a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-ec-20220622.csv https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-temp-20220622.csv ALMS01_F6_TEMP eng; US McMurdo Dry Valleys LTER ALMS01_F6_TEMP Data Source Definition : ALMS01 at F6 - Soil Temperature Number of Header Lines : 1 Orientation : Column Field Delimiter : , false dataset_code Internal dataset code. date_time Date and time measurement was recorded in NZDT (GMT+13). Date Time Format: YYYY-MM-DD HH:MM:SS station Station code associated with this ALMS. location Location of this ALMS. measurement 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. a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-temp-20220622.csv https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-vwc-20220622.csv ALMS01_F6_VWC eng; US McMurdo Dry Valleys LTER ALMS01_F6_VWC Data Source Definition : ALMS01 at F6 - Soil Volumetric Water Content Number of Header Lines : 1 Orientation : Column Field Delimiter : , false dataset_code Internal dataset code. date_time Date and time measurement was recorded in NZDT (GMT+13). Date Time Format: YYYY-MM-DD HH:MM:SS station The station code associated with this ALMS. location The location of this ALMS. measurement 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. a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. DBF https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-vwc-20220622.csv dataset 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). 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. Metadata Access Constraints: none Metadata Use Constraints: none annually McMurdo Dry Valleys LTER http://mcmlter.org/ pointOfContact