CH-CHA, Chamau


Site Description

Intensively managed grassland, 393 m asl, located in a pre-alpine valley bottom. The area and the adjacent farm are part of the Agricultural Education and Counseling Center Schluechthof. Eddy covariance flux measurements were started in July 2005 (tower coordinates: 47°12’36.8″ N and 8°24’37.6″ E (Google Maps); WGS84 47.210222, 8.410444; at 393 m asl).

Location

  • Altitude: 393 m a.s.l.
  • Site name: Chamau, Kt. Zug, Switzerland
  • Land cover (IGBP land classification): Grassland
  • Land use: Intensive management with six cuts per year (mainly for silage).
  • Coordinates: 47°12’36.8″ N / 8°24’38.3″ E (47.210227, 8.410645) (Google Maps)
  • Location description: Chamau is located in a lowland broad river valley of the Reuss River.
  • FLUXNET ID: CH-Cha (link)

Climate

Air Temperature

Numbers shown are for the time period 2006-2020.

  • Average air temperature: 9.9°C
  • Average air temperature 2006-2013: 9.5°C
  • Average air temperature 2014-2020: 10.3°C (+0.8°C compared to 2006-2013)
  • 5 warmest years: 2018 (11.0°C), 2020 (10.6°C), 2019 (10.3°C), 2014 (10.2°C), 2015 (10.2°C)
  • 5 coolest years: 2010 (8.7°C), 2013 (8.9°C), 2012 (9.5°C), 2006 (9.5°C), 2008 (9.5°C)

Climate chart

Climate chart after Walter and Lieth (1967) for Chamau for the years 2005 to 2020. Mean monthly temperature (red line) and mean monthly precipitation sum (blue line) are shown. Blue vertically hatched area shows the humid period of the year, blue filled area indicates months with precipitation greater than 100 mm (axis scale changes > 100 mm). Average annual temperature and average annual precipitation sum are listed in black at the top. Maximum measured temperature (from half-hourly values), mean daily maximum temperature of the warmest month (July), mean annual temperature amplitude, mean daily minimum temperature of the coldest month (January) and minimum measured temperature are listed as black numbers on the left. Petrol shaded areas on the x axis indicate the months where the mean daily minimum temperature is lower than 0 °C, and petrol hatched areas the months with absolute minimum temperature of 0 °C (frost possible). The number in the middle of the x axis states the mean duration of consecutive frost-free days (when temperature does not drop below 0). Source: Feigenwinter et al. (2023)

Precipitation

  • Average annual precipitation sum: 1134mm (2005-2020)

Nearby meteo stations

Vegetation

  • Dominant vegetation: mixture of Italian ryegrass (Lolium multiflorum) and white clover (Trifolium repens L.), predominantly used for fodder production and occasional winter grazing by sheep. 1,2

Soil

  • Geology: The area is located on tertiary molasse. The Reuss-valley is filled with postglacial retreating rubble of the Reuss glacier.
  • Soil type: Cambisol/Gleysol
  • Soil pH: 5.3 in the top 10 cm of the soil 4
  • Soil texture:

Management

  • Intensively managed grassland with recurrent of sporadic activities.
  • Regular mowing and subsequent organic fertilizer application in the form of liquid slurry (up to seven times per year).
  • Occasional grazing by sheep and cattle for a few days in early spring and/or fall.
  • Sporadic activities aiming at maintaining the typical fodder species composition comprise reseeding, herbicide and pesticide application, or irregular plowing and harrowing on an approximately decadal timescale.
  • For more info see references 1,2,3,4.

Detailed Management Info

Data

Current Flux Products

Available Level-1 Fluxes

wdt_ID Site & Year SA GA CO2 H2O N2O CH4 Current Version EFDC Version EFDC Upload EFDC Calcs Details
19 CH-CHA 2016 R350 IRGA75 CO2 H2O FF-201902 FF-201902 29 Mar 2019 NEW
20 CH-CHA 2017 R350 IRGA75 CO2 H2O FF-202108 FF-202008 15 Oct 2020 UPDATE
21 CH-CHA 2018 R350 IRGA75 CO2 H2O FF-202108 FF-202008 15 Oct 2020 UPDATE
22 CH-CHA 2015 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
23 CH-CHA 2014 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
24 CH-CHA 2013 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
25 CH-CHA 2012 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
26 CH-CHA 2011 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
27 CH-CHA 2010 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
28 CH-CHA 2009 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
29 CH-CHA 2008 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
30 CH-CHA 2007 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
31 CH-CHA 2006 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
32 CH-CHA 2005 R350 IRGA75 CO2 H2O FF-201605 FF-201605 04 Jun 2016 NEW
33 CH-CHA 2015 R350 QCL N2O CH4 FF-201605 FF-201605 05 May 2019 NEW
34 CH-CHA 2014 R350 QCL N2O CH4 FF-201605 FF-201605 05 May 2019 NEW
35 CH-CHA 2013 R350 QCL N2O CH4 FF-201605 FF-201605 05 May 2019 NEW
36 CH-CHA 2012 R350 QCL N2O CH4 FF-201605 FF-201605 05 May 2019 NEW
143 CH-CHA 2020 R350 QCL N2O CH4
144 CH-CHA 2021 R350 QCL/LGR N2O CH4
145 CH-CHA 2022 R350 LGR N2O CH4
140 CH-CHA 2017 R350 QCL N2O CH4
141 CH-CHA 2018 R350 QCL N2O CH4
142 CH-CHA 2019 R350 QCL N2O CH4
137 CH-CHA 2022 R350 IRGA75 CO2 H2O PLANNED
138 CH-CHA 2021 R350 IRGA75 CO2 H2O NEW
139 CH-CHA 2016 R350 QCL N2O CH4
126 CH-CHA 2019 R350 IRGA75 CO2 H2O FF-202108 FF-202008 15 Oct 2020 NEW
127 CH-CHA 2020 R350 IRGA75 CO2 H2O FF-202108 FF-202101 01 Apr 2021 UPDATE
Site & Year SA GA CO2 H2O N2O CH4 Current Version EFDC Version EFDC Upload EFDC Calcs Details

Eddy covariance raw data files

Photos

You are here: CH-CHA, Chamau

Webcam

  • Most recent image from Grassland Floor 4 (GF4)

Fieldbook

News

QA/QC Short Report

Short Report – QA/QC Meeting 30 May 2024

The new Short Report with an overview of recent fluxes and meteo data can be downloaded from here: Short Report - QAQC Meeting 30 May 2024 ... Read More

References

1 Zeeman, M. J., Hiller, R., Gilgen, A. K., Michna, P., Plüss, P., Buchmann, N., & Eugster, W. (2010). Management and climate impacts on net CO2 fluxes and carbon budgets of three grasslands along an elevational gradient in Switzerland. Agricultural and Forest Meteorology, 150(4), 519–530. doi: 10.1016/j.agrformet.2010.01.011
2 Merbold, L., Decock, C., Eugster, W., Fuchs, K., Wolf, B., Buchmann, N., & Hörtnagl, L. (2021). Are there memory effects on greenhouse gas emissions (CO2, N2O and CH4) following grassland restoration? Biogeosciences, 18(4), 1481–1498. doi: 10.5194/bg-18-1481-2021
3 Merbold, L., Eugster, W., Stieger, J., Zahniser, M., Nelson, D., & Buchmann, N. (2014). Greenhouse gas budget (CO2 , CH4 and N2O) of intensively managed grassland following restoration. Global Change Biology, 20(6), 1913–1928. doi: 10.1111/gcb.12518
4 Feigenwinter, I., Hörtnagl, L., Zeeman, M. J., Eugster, W., Fuchs, K., Merbold, L., & Buchmann, N. (2023). Large inter-annual variation in carbon sink strength of a permanent grassland over 16 years: Impacts of management practices and climate. Agricultural and Forest Meteorology, 340, 109613. https://doi.org/10.1016/j.agrformet.2023.109613

More Info

Last Updated on 16 Apr 2024 13:45