{"id":2008,"date":"2014-02-27T21:43:07","date_gmt":"2014-02-27T21:43:07","guid":{"rendered":"http:\/\/dev.nicethemes\/flatbase\/?page_id=2"},"modified":"2024-12-20T22:33:56","modified_gmt":"2024-12-20T21:33:56","slug":"about","status":"publish","type":"page","link":"https:\/\/swissfluxnet.ethz.ch\/","title":{"rendered":"About"},"content":{"rendered":"\n

Context<\/h2>\n\n\n\n

The Swiss FluxNet combines flux sites in Switzerland where CO2<\/sub> and H2<\/sub>O vapour fluxes (at some sites also CH4<\/sub> and N2<\/sub>O fluxes) are measured at ecosystem scale using the eddy-\u200bcovariance technique. It currently encompasses six long-\u200bterm ecosystem sites, all run by our group, covering the major land-\u200buse types in Switzerland: forest (mixed deciduous: L\u00e4geren<\/a>; evergreen: Davos<\/a>), grassland (Chamau<\/a>, Fr\u00fceb\u00fcel<\/a>, Alp Weissenstein\/Crap Alv<\/a>), and cropland (Oensingen<\/a>). Flux measurements in an urban setting (Basel<\/a>) as well as within a watershed (Rietholzbach<\/a>) complement the Swiss FluxNet. Further sites with short-\u200bterm measurements such as Dischma (winter measurements over grassland; closed down) and Oensingen (grassland; closed down) provided additional information. \u00a0<\/p>\n\n\n\n

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Approach<\/h2>\n\n\n\n

Ecosystem flux measurements of CO2<\/sub>, H2<\/sub>O vapour, CH4<\/sub> and N2<\/sub>O are performed with the eddy covariance method. The eddy covariance method is based on high frequency measurements (10\u201320 Hz) of turbulent fluctuations in vertical wind velocity and the mixing ratio of a trace gas. The ecosystem flux itself is calculated from the covariance between these two measurements using time averaging of typically 30 min.<\/p>\n\n\n\n

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Technical specifications<\/h2>\n\n\n\n

Highest-\u200bquality infrared gas analyzers (CO2<\/sub>, H2<\/sub>Ov<\/sub>) and laser spectrometers (CH4<\/sub> and N2<\/sub>O) to resolve turbulent short-\u200bterm fluctuations in the trace gas mixing ratio Micrometeorology sensors: 3D sonic anemometer for wind speed and directions; radiation sensors for radiation budget Soil climate profiles (temperature, moisture, soil heat flux) Auxiliary instrumentation to measure soil CH4<\/sub> and N2<\/sub>O fluxes with automated chambers (Davos), soil\/stem\/leaf respiration, xylem sap flow, stem diameter growth, phenology, leaf area index (LAI), biomass, precipitation, etc.<\/p>\n\n\n\n

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Context The Swiss FluxNet combines flux sites in Switzerland where CO2 and H2O vapour fluxes (at some sites also CH4 and N2O fluxes) are measured at ecosystem scale using the eddy-\u200bcovariance technique. It currently encompasses six long-\u200bterm ecosystem sites, all run by our group, covering the major land-\u200buse types in . . . Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"_lmt_disableupdate":"no","_lmt_disable":"no","ngg_post_thumbnail":0,"footnotes":""},"coauthors":[310],"class_list":["post-2008","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/pages\/2008","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/comments?post=2008"}],"version-history":[{"count":25,"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/pages\/2008\/revisions"}],"predecessor-version":[{"id":12808,"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/pages\/2008\/revisions\/12808"}],"wp:attachment":[{"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/media?parent=2008"}],"wp:term":[{"taxonomy":"author","embeddable":true,"href":"https:\/\/swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/coauthors?post=2008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}