Description

The Innsbruck Box (i-Box) is a testbed for studying boundary layer processes in highly complex terrain. Designed to be a long-term "reference box" for studying the characteristics of turbulence structure and exchange processes in truly complex topography, i-Box represents an integrated approach combining three-dimensional long-term turbulence observations with high-resolution numerical modeling. The i-Box observational stations are located in the Inn Valley, an approximately northeast-southwest oriented valley in western Austria, characterized by very complex terrain with steep slopes, flat foothills, numerous side valleys, and variable land use characteristics. The locations of the core sites (six turbulence stations) were chosen to represent different topographic features in order to secure the universality of the obtained results. Further information about the i-Box project can be found in Rotach et al. (2017) and on the i-Box WIKI.

Site CS-SF27 is located on a steep slope on the north sidewall of the Inn Valley. The site is characterized by a relatively homogeneous mountain pine field with an avarage height of 2 m agl. There is a small clearing directly South of the tower. The 6-m high tower is a full energy-balance station and is instrumented with one level of turbulence measurements.

Site characteristics

Coordinates: 47.39504˚N, 11.68714˚E (UTM: 702774.61 E, 5252566.10 N)

Altitude: 1861 m MSL

Slope angle: 23˚

Slope orientation: 340˚

Surface characteristics: mountain pine

Status: operational since 2023

Power supply: solar panel

Datalogger: CR1000X

Instrumentation

Instrument	Height	Serial number	Notes
Turbulence
Irgason	6.0 m	3091	Updated on 03 Oct 2023 Angle to true north: 86˚ vertical tilt: 0° horizontal tilt: 67°
Irgason	6.0 m	3091	Since 21 Sep 2023 Angle to true north: 97˚ vertical tilt: 5° upwards (corrected later) horizontal tilt: 50° (slope parallel would be 67°)
Temperature/Humidity
Rotronic HC2-S3	4.0 m		since 2023
Rotronic HC2-S3	6.0 m		since 2023
Weather station
Smart Weather Sensors WS600-UMB	6.0 m		since 2023
Pressure
Setra 278			in logger box
Precipitation/Snow
SR50A	2.30 m		towards east, above mountain pine
SR50A	2.50 m		towards south, above grass
Radiation
CNR4	2.00 m		SWd: xx uV/Wm2 SWu: xx uV/Wm2 LWd: xx uV/Wm2 LWu: xx uV/Wm2
Soil
Heat Flux Plate HFP01			xx uV/Wm2
Heat Flux Plate HFP02			xx uV/Wm2
Campbell 107 Temp probe 1
Campbell 107 Temp probe 2
Campbell 107 Temp probe 3
Campbell 107 Temp probe 4

Datasets

RAWDATA since 2023

Uncorrected 1-min raw data, no quality checks applied

Smart Weather Sensor

5-s data of smart weather sensor (WS600-UMB) averaged to 1 min including measurements of temperature, relative humidity, wind speed and direction, precipitation, precipitation type, ...

SNOW

Snow site

Status data since 2023

Flag indicating weather ventilator or heating of measurement device is running