uid=MCM,o=EDI,dc=edirepository,dc=org all public read ALMS01_F6 Michael Gooseff michael.gooseff@colorado.edu http://goosefflab.weebly.com https://orcid.org/0000-0003-4322-8315 McMurdo Dry Valleys LTER http://mcmlter.org/ Joel Singley

Institute of Arctic and Alpine Research Boulder CO 80303 US

joel.singley@colorado.edu https://orcid.org/0000-0002-7906-8491 associated researcher Adam Wlostowski wlostowskiadam@gmail.com associated researcher Renée Brown rfbrown@unm.edu https://orcid.org/0000-0002-4986-7663 data manager 2022-07-01 English

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.

conductivity electrical conductivity soil moisture soil temperature soil water content specific conductivity temperature water content LTER Controlled Vocabulary Antarctica conductivity electrical conductivity LTER McMurdo Dry Valleys soil moisture soil temperature specific conductivity Taylor Valley temperature water content Station Keywords disturbance LTER Core Areas 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.

This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-2224760). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.

https://mcm.lternet.edu/content/continuous-soil-temperature-specific-conductance-and-volumetric-water-content-measurements Coordinates provided by Mike Gooseff in October 2020. 163.253066700000 163.253066700000 -77.608333300000 -77.608333300000 2014-01-29 2021-12-01 McMurdo Dry Valleys LTER Information Manager im@mcmlter.org McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER

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.

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). ALMS01_F6_EC ALMS01 at F6 - Soil Specific Conductance mcmlter-soil-alms01_f6-ec-20220622.csv 13417176 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-ec-20220622.csv dataset_code Dataset code Internal dataset code. string Internal dataset code. date_time Timestamp Date and time measurement was recorded in NZDT (GMT+13). date YYYY-MM-DD HH:MM:SS station Station code The station code associated with this ALMS. string The station code associated with this ALMS. location Location name The location of this ALMS. string The location of this ALMS. measurement Measurement type Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. string Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. a_5cm a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real a_15cm a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real a_25cm a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real b_5cm b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real b_15cm b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real b_25cm b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real c_5cm c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real c_15cm c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real c_25cm c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real d_5cm d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real d_15cm d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real d_25cm d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real e_5cm e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real e_15cm e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real e_25cm e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. milliSiemensPerCentimeter real ALMS01_F6_TEMP ALMS01 at F6 - Soil Temperature mcmlter-soil-alms01_f6-temp-20220622.csv 31597618 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-temp-20220622.csv dataset_code Dataset code Internal dataset code. string Internal dataset code. date_time Timestamp Date and time measurement was recorded in NZDT (GMT+13). date YYYY-MM-DD HH:MM:SS station Station code Station code associated with this ALMS. string Station code associated with this ALMS. location Location name Location of this ALMS. string Location of this ALMS. measurement Measurement type Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. string Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. a_1cm a_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real a_5cm a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real a_10cm a_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real a_15cm a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real a_20cm a_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real a_25cm a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real a_30cm a_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_1cm b_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_5cm b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_10cm b_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_15cm b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_20cm b_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_25cm b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real b_30cm b_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_1cm c_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_5cm c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_10cm c_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_15cm c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_20cm c_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_25cm c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real c_30cm c_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_1cm d_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_5cm d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_10cm d_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_15cm d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_20cm d_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_25cm d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real d_30cm d_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_1cm e_1cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_5cm e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_10cm e_10cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_15cm e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_20cm e_20cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_25cm e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real e_30cm e_30cm Site (A-E) and soil depth (in cm) where the measurement was recorded. celsius real ALMS01_F6_VWC ALMS01 at F6 - Soil Volumetric Water Content mcmlter-soil-alms01_f6-vwc-20220622.csv 15641515 1 column , https://mcm.lternet.edu/sites/default/files/data/mcmlter-soil-alms01_f6-vwc-20220622.csv dataset_code Dataset code Internal dataset code. string Internal dataset code. date_time Timestamp Date and time measurement was recorded in NZDT (GMT+13). date YYYY-MM-DD HH:MM:SS station Station code The station code associated with this ALMS. string The station code associated with this ALMS. location Location name The location of this ALMS. string The location of this ALMS. measurement Measurement type Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. string Type of measurement recorded, where 'temp' = soil temperature, 'vwc' = soil volumetric water content, and 'ec' = specific conductance. a_5cm a_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real a_15cm a_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real a_25cm a_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real b_5cm b_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real b_15cm b_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real b_25cm b_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real c_5cm c_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real c_15cm c_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real c_25cm c_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real d_5cm d_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real d_15cm d_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real d_25cm d_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real e_5cm e_5cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real e_15cm e_15cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real e_25cm e_25cm Site (A-E) and soil depth (in cm) where the measurement was recorded. percent real ratio of two quantities as percent composition (1:100)