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CH-AWS, Alp Weissenstein

Site Description

Managed (grazed) alpine grassland at 1900–2500 m asl, mainly on calcareous bedrock. The area and the adjacent facilities are part of the ETH Research Station. Eddy covariance flux measurements were carried out in campaign mode during summer in 2006 to 2014 (tower coordinates: 46°34’59.2″N and 9°47’26.3″E at 1978 m asl). Since 2014, measurements are running continuously.

Location

  • Altitude: 1978 m a.s.l.
  • Site name: Alp Weissenstein, Kt. Graubünden, Switzerland
  • Parcel name: Hirschwiese 3C (location of eddy covariance station)
  • Land use: Grazing 1-2 times per year, summer-grazed pasture
  • Coordinates: 46°34’59.2″N 9°47’26.3″E (46.583102, 9.790624) (Google Maps)
  • Location description: –
  • FLUXNET ID: CH-Aws

Climate

All numbers shown are for the time period 2015-2021.

Air temperature

  • Average air temperature: 4.0°C
  • Warmest year: 2020 (4.5°C)
  • Coolest year: 2021 (3.3°C)
  • Highest measured air temperature: 26.9°C (26 Jun 2019, half-hourly average between 14:30 and 15:00)
  • Lowest measured air temperature: -19.9°C (27 Feb 2018, half-hourly average between 18:30 and 19:00)

Numbers updated 8 Feb 2022

Nearby meteo stations

Vegetation

  • Land cover (IGBP land classification): coming soon
  • Community: Deschampsio cespitosae-Poetum alpinae (at research site), Trifolio thalii-Festucetum violoceae (slope above research site)
  • Height: 10-40cm
  • Leaf area index (LAI): max. 4 m2 m-2

Soil

  • Geology: Underlying material built by moraines from the Val Bever glacier and by limestone debris from the steep valley slopesthat overlie the glacial formation.
  • Soil type: slightly humous to humous sandy loam (Hiller et al., 2008)
  • Soil texture: coming soon
  • Soil analysis:
from: M. Schärer (2003) Kurzbericht der Fallstudie Alp Weissenstein, Nährstoffanalysen in Alpweiden Sommer 2002, ETH Zürich, unpublished

Data

Current Flux Products

Available Level-1 Fluxes

wdt_ID Site & Year SA GA CO2 H2O Current Version EFDC Version EFDC Upload EFDC Calcs Details
128 CH-AWS 2020 HS50 IRGA72 CO2 H2O FF-202201 FF-202101 18 Apr 2021 UPDATE
5 CH-AWS 2006 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 NEW
6 CH-AWS 2007 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 NEW
7 CH-AWS 2008 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 NEW
8 CH-AWS 2009 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 NEW
9 CH-AWS 2010 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 UPDATE
10 CH-AWS 2011 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 UPDATE
11 CH-AWS 2013 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 NEW
12 CH-AWS 2014 R2 IRGA75 CO2 H2O FF-202002 FF-202002 15 Oct 2020 NEW
13 CH-AWS 2015 R2 IRGA75 CO2 H2O FF-202201 FF-202002 15 Oct 2020 NEW
14 CH-AWS 2016 HS50 IRGA72 CO2 H2O FF-202201 FF-202002 15 Oct 2020 UPDATE
15 CH-AWS 2018 HS50 IRGA72 CO2 H2O FF-202201 FF-202002 15 Oct 2020 UPDATE
16 CH-AWS 2017 HS50 IRGA72 CO2 H2O FF-202201 FF-202002 15 Oct 2020 UPDATE
18 CH-AWS 2019 HS50 IRGA72 CO2 H2O FF-202201 FF-202002 15 Oct 2020 NEW
137 CH-AWS 2021 HS50 IRGA72 CO2 H2O FF-202201 FF-202201 04 Oct 2023 NEW
138 CH-AWS 2022 HS50 IRGA72 CO2 H2O FF-202305 FF-202305 04 Oct 2023 NEW
139 CH-AWS 2023 HS50 IRGA72 CO2 H2O FF-202402 FF-202402 06 Mar 2024 NEW
140 CH-AWS 2024 HS50 IRGA72 CO2 H2O FF-202502 FF-202502 10 Feb 2025 NEW
Site & Year SA GA CO2 H2O Current Version EFDC Version EFDC Upload EFDC Calcs Details

Eddy covariance raw data files

Dataflow

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Webcam

  • Most recent image from main tower

Fieldbook

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Last Updated on 12 Feb 2025 19:03