CH-LAE, Laegeren


Site Description

Managed mixed deciduous mountain forest located on the steep Lägeren mountain (NW of Zurich, Swiss Plateau), 800 m asl. The forest is highly diverse, dominated by beech and fir. The site is part of the international CarboEurope IP network and the NABEL (Swiss air quality network) and a long-term forest ecosystem research site (LWF) of the WSL (Institut f.Wald Schnee & Landschaft). Eddy covariance flux measurements were started in April 2004 (tower coordinates: 47°28’42.0″ N and 8°21’51.8″ E; at 689 m asl).

Location

  • Altitude: 689 m a.s.l.
  • Site name: Lägeren, Canton of Aargau, Switzerland
  • Land cover (IGBP classification): Mixed Forest (MF)
  • Main tree species: Fagus sylvatica L., Fraxinus excelsior L., Abies alba Mill., Picea abies (L.) Karst., Tilia cordata Mill., Acer pseudoplatanus L., Quercus robur L., Ulmus glabra Huds.
  • Coordinates: 47°28’42.0″ N / 8°21’51.8″ E (47.478333, 8.364389) (Google Maps)
  • Location description: The site is located on the southern slope of the Lägern, which forms the eastern most part of the Jura mountains (NW of Zurich, Swiss Plateau). (1)
  • FLUXNET ID: CH-Lae (link)
Digital landscape model of the footprint area (red frame). Source: Wehrli L. 2006: GIS-basierte Kohlenstoffvorratsinventur: Waldböden an der CarboEuropeIP Untersuchungsfläche Lägern. Diplomarbeit. Universität Zürich.

Climate

Air temperature

All numbers shown are for the time period 2005-2020.

  • Average air temperature: 8.6°C
  • Average air temperature 2005-2012: 7.8°C
  • Average air temperature 2013-2020*: 9.4°C (+1.6°C compared to 2005-2012)
  • 5 warmest years*: 2018 (10.7°C), 2020 (10.5°C), 2019 (10.3°C), 2017 (9.8°C), 2016 (9.6°C)
  • 5 coolest years*: 2010 (6.8°C), 2013 (7.1°C), 2005 (7.4°C), 2008 (7.6°C), 2012 (7.8°C), 2009 (7.9°C)
  • Highest measured air temperature: 33.5°C (25 Jul 2019, half-hourly average between 15:30 and 16:00)
  • Lowest measured air temperature: -17.2°C (7 Feb 2012, half-hourly average between 4:30 and 5:00)

*numbers updated 8 Jun 2021

Nearby meteo stations

Vegetation

The forest is highly diverse, dominated by beech and fir.

  • Land cover (IGBP land classification): MF (Mixed Forests: Lands dominated by trees with a percent cover >60% and height exceeding 2 meters. Consists of tree communities with interspersed mixtures or mosaics of the other four forest types. None of the forest types exceeds 60% of landscape.)
  • Main tree species: Fagus sylvatica
  • Top-height diameter (quadratic average diameter of the 100 thickest trees per ha): 72.18 cm
  • Number of trees BHD >= 12 cm (2011): 503
  • Woodland association after Ellenberg and Klötzli’s classification (1972): Galio odoratio-Fagetum typicum / Pulmonario-Fagetum typicum

Maximum Tree Age

  • picea abies: 120-170 years
  • fagus sylvatica: ca. 150 years

LAI

  • LAI (± standard error): 4.1 ±0.3 m2 m-2
    Measured in Jun 2006, in 17 plots within the footprint area, using Licor LAI-2000.

Soil

  • Geology: The main bedrocks of the study site are limestone, marl and sandstone, with transition zones between marland limestone (loamy debris) and marl mixed with sandstone (loam).
  • Soil type: The main soil types are rendzic leptosols (or rendzinas) and haplic cambisols according to the World Reference Base of Soil Resources (IUSS Working Group WRB, 2007). The litter layer is thin, since leaf litter decomposes almost completely within one year.

Management

  • Management system / land use: high forest
  • Silvicultural system: forest reserve 

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
85 CH-LAE 2017 HS50 IRGA72/75 CO2 H2O FF-201902 FF-201902 09 Jun 2021 UPDATE
86 CH-LAE 2018 HS50 IRGA72 CO2 H2O FF-201902 FF-201902 09 Jun 2021 UPDATE
87 CH-LAE 2016 HS50 IRGA72/75 CO2 H2O FF-201902 FF-201902 09 Jun 2021 UPDATE
88 CH-LAE 2015 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
89 CH-LAE 2014 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
90 CH-LAE 2013 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
91 CH-LAE 2012 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
92 CH-LAE 2011 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
93 CH-LAE 2010 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
94 CH-LAE 2009 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
95 CH-LAE 2008 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
96 CH-LAE 2007 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
97 CH-LAE 2006 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
98 CH-LAE 2005 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
99 CH-LAE 2004 HS50 IRGA75 CO2 H2O FF-201606 FF-201606 09 Jun 2021 UPDATE
101 CH-LAE 2019 HS50 IRGA72/75 CO2 H2O FF-202006 FF-202006 09 Jun 2021 UPDATE
102 CH-LAE 2020 HS50 IRGA72 CO2 H2O FF-202101 FF-202101 09 Jun 2021 NEW
137 CH-LAE 2021 NEW
138 CH-LAE 2022 NEW
Site & Year SA GA CO2 H2O Current Version EFDC Version EFDC Upload EFDC Calcs Details

Eddy covariance raw data files

Photos

You are here: CH-LAE, Laegeren

Webcam

  • Most recent image from the main tower

Fieldbook

News

QA/QC Short Report

Short Report – QA/QC Meeting 22 Feb 2024

The new Short Report with an overview of recent fluxes and meteo data can be downloaded from here: Short Report - QAQC Meeting 22 Feb 2024.pdf ... Read More

Updated dataset download numbers

In 2023, our datasets were downloaded (at least) 6645 times, which corresponds to 18.2 downloads per day. Most downloaded sites were CH-DAV, Davos, CH-OE2, Oensingen and CH-CHA, Chamau with more than 1300 downloads each. More details including a plot and table can be found on FLUXNET Number Of Downloads ... Read More
QA/QC Short Report

Short Report – QA/QC Meeting 11 Jan 2024

The new Short Report with an overview of recent fluxes and meteo data can be downloaded from here: Short Report - QAQC Meeting 11 Jan 2024.pdf ... Read More

References

More Info

Last Updated on 14 Feb 2024 15:30