{"id":9088,"date":"2021-03-03T10:00:00","date_gmt":"2021-03-03T09:00:00","guid":{"rendered":"https:\/\/www.swissfluxnet.ethz.ch\/?p=9088"},"modified":"2024-02-18T22:12:44","modified_gmt":"2024-02-18T21:12:44","slug":"flux-processing-meeting-2-for-ff-202101","status":"publish","type":"post","link":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/2021\/03\/03\/flux-processing-meeting-2-for-ff-202101\/","title":{"rendered":"Flux Processing Meeting #2 for FF-202101"},"content":{"rendered":"<p><strong>Meeting date<\/strong>: 3 Mar 2021, 10h<\/p>\n<p><strong>Participants<\/strong>: ***<\/p>\n<p>&nbsp;<\/p>\n<h2>Goal of FF-202101<\/h2>\n<ul>\n<li><strong>Goal 1<\/strong>: Final fluxes (FF) for selected site years<\/li>\n<li><strong>Goal 2<\/strong>: Final flux product (FP) for all FFs<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Purpose of this meeting<\/h2>\n<ul>\n<li>Fluxes for multiple site years are currently updated or newly calculated, started in January 2021.<\/li>\n<li>This is the second meeting to identify required site years and to agree on the processing schedule.<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Goals of this meeting<\/h2>\n<ul>\n<li>Give overview of upcoming processing steps for SRPs<\/li>\n<li>Give update on current processing status<\/li>\n<li>Discuss further steps for upcoming processing<\/li>\n<li>Identify what needs to be processed or updated<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Notes<\/h2>\n<ul>\n<li><strong>Please make sure to check data you are working with. Check if anything looks unusual or not as you expected, cross-check when possible.<\/strong><\/li>\n<li>An <strong>overview of the current processing<\/strong> for FF-202101 can be found online in Google Docs <a href=\"https:\/\/docs.google.com\/spreadsheets\/d\/1JRmymOdtp0Tl7BUzpL06ly2FHZXR8BGRZEDtK_Vpnl4\/edit#gid=833461712\" target=\"_blank\" rel=\"noopener\">here<\/a>.<\/li>\n<li>FF-202101 includes <strong>40+ site years<\/strong>. Note that each gas analyzer counts separately due to separate processing, e.g. CH-CHA has IRGA75 and QCL fluxes for 2020 (counts as 2 years).<\/li>\n<li>Some site years will be uploaded to <strong>FLUXNET<\/strong>, ideally by the <strong>end of March 2021<\/strong>. Check below which sites.<\/li>\n<li><strong>Nearly all calculations are done on the RDSnx (virtual computers).<\/strong>\n<ul>\n<li>Multiple calculations were stopped due to problems with server access from the RDSnx<\/li>\n<li>Recent calculations worked well without problems<\/li>\n<li>It seems that calculations work better when the scratch drive E on the RDSnx is used<\/li>\n<li>E is a temporary storage space<\/li>\n<li><strong>E is deleted once a month<\/strong> during maintenance, check the RDSnx desktop wallpaper for maintenance dates and make sure to move your results away from E to another space before they are deleted<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Calculation priorities<\/h2>\n<h3>Priority 1<\/h3>\n<ul>\n<li><strong>CH-INO<\/strong>: CH-AES 2019-2020, CH-DAE 2019, CH-OE2 2018-2020 [for PhD RM]&nbsp; &#8211;&gt; using dynamic vegetation height\n<ul>\n<li><em><em>shared in FLUXNET: none<\/em><\/em><\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-OE2<\/strong>: 2020 (IRGA72) [for PhD RM]&nbsp; &#8211;&gt; using dynamic vegetation height\n<ul>\n<li><em><em>shared in FLUXNET: CH-OE2 2020 IRGA72<\/em><\/em>&nbsp;<\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-CHA<\/strong>: 2019 (QCL) and 2020 (QCL+IRGA75) [for PhD IF]&nbsp; &#8211;&gt; using dynamic vegetation height\n<ul>\n<li><em><em>shared in FLUXNET: CH-CHA 2020 IRGA75<\/em><\/em><\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-DAV<\/strong>: IRGA72\n<ul>\n<li><em>shared in FLUXNET: CH-DAV 2020 IRGA72<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Priority 2<\/h3>\n<ul>\n<li><strong>CH-CHA<\/strong>: 2016-2018 (QCL) [for PhD IF]\n<ul>\n<li><em><em>shared in FLUXNET: none<\/em><\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Priority 3<\/h3>\n<ul>\n<li><strong>CH-AWS<\/strong>: 2020 (IRGA72) <span style=\"text-decoration: underline;\">needs meteo screening<\/span>\n<ul>\n<li><em>shared in FLUXNET: CH-AWS 2020<\/em><\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-FRU<\/strong>: 2020 (IRGA72) <span style=\"text-decoration: underline;\">needs meteo screening<\/span>\n<ul>\n<li><em>shared in FLUXNET: CH-FRU 2020<\/em><\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-LAE<\/strong>: 2020 (IRGA72) <span style=\"text-decoration: underline;\">needs meteo screening?<\/span>\n<ul>\n<li><em>shared in FLUXNET: CH-LAE 2020<\/em><\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-DAV<\/strong>: 1997-2005 (IRGA62) H2O correction from NABEL reference\n<ul>\n<li><em>shared in FLUXNET: CH-DAV 1997-2005<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Priority 4<\/h3>\n<ul>\n<li><strong>CH-LAS<\/strong>: 2014-2020 (IRGA75) possible that 2014-2018 are already final, check [for PhD AS]\n<ul>\n<li><em>shared in FLUXNET: none?<\/em><\/li>\n<\/ul>\n<\/li>\n<li><strong>CH-LAE<\/strong>: parallel measurements: IRGA75 2017, IRGA72 2016 both still todo [for PhD AS]\n<ul>\n<li><em>shared in FLUXNET: IRGA75 fluxes should be updated with IRGA72 fluxes where possible<\/em><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Later<\/h3>\n<ul>\n<li>CH-DAV QCL<\/li>\n<\/ul>\n<h3>Other<\/h3>\n<ul>\n<li>What about Burba <strong>off-season uptake correction<\/strong> for older years? Use parallel measurements from sites also for other sites as basis for correction?\n<ul>\n<li>The correction can be done quickly after Level-1 fluxes were calculated, this is a short processing step.<\/li>\n<li>But it is currently up for discussion how to best perform this correction.<\/li>\n<li>See Figure below how this correction affected CH-DAV 2016 CO2 fluxes.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<div id=\"attachment_9095\" style=\"width: 780px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction.png\" data-rel=\"lightbox-image-0\" data-rl_title=\"CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction\" data-rl_caption=\"\" title=\"CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction\"><img decoding=\"async\" aria-describedby=\"caption-attachment-9095\" class=\"wp-image-9095 size-large lazyload\" data-src=\"https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction-1024x691.png\" alt=\"\" width=\"770\" height=\"520\" data-srcset=\"https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction-1024x691.png 1024w, https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction-300x202.png 300w, https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction-768x518.png 768w, https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction-1536x1036.png 1536w, https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction-770x519.png 770w, https:\/\/www.swissfluxnet.ethz.ch\/wp-content\/uploads\/2021\/03\/CH-DAV_2016_IRGA75_IRGA72_comparison_burba_offseason_uptake_correction.png 1914w\" data-sizes=\"(max-width: 770px) 100vw, 770px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 770px; --smush-placeholder-aspect-ratio: 770\/520;\" \/><\/a><p id=\"caption-attachment-9095\" class=\"wp-caption-text\">Effect of off-season uptake correction on cumulative CO2 fluxes (no gap-filling) at CH-DAV 2016. <span style=\"color: #00ccff;\">BLUE<\/span>: IRGA72 fluxes (reference), <span style=\"color: #ff0000;\">RED<\/span>: IRGA75 fluxes without correction, <span style=\"color: #339966;\">GREEN<\/span>: IRGA75 fluxes with 7% correction, <span style=\"color: #ffcc00;\">YELLOW<\/span>: IRGA75 fluxes with 8.5% correction.<\/p><\/div>\n<p>&nbsp;<\/p>\n<h2>Time schedule<\/h2>\n<ul>\n<li>Level-1 flux calculations staretd in Jan 2021<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Tools<\/h2>\n<ul>\n<li><code>METSCR<\/code><strong>: <\/strong>ETH Meteoscreening tool for meteo data check<\/li>\n<li><code>BICO<\/code>: Conversion of binary raw data to csv files&nbsp; |&nbsp; <a href=\"https:\/\/gitlab.ethz.ch\/holukas\/bico\" target=\"_blank\" rel=\"noopener\">link<\/a><\/li>\n<li><code>DYCO<\/code>: Improved lag detection for low fluxes fluxes<\/li>\n<li><code>FLUXRUN<\/code>: Flux calculations Level-1, using EddyPro&nbsp; | <a href=\"https:\/\/gitlab.ethz.ch\/holukas\/fluxrun\" target=\"_blank\" rel=\"noopener\">link<\/a><\/li>\n<li><code>AMP<\/code>: Quality control of fluxes, Creation of Level-2<\/li>\n<li><code>REDDYPROC<\/code>: ustar filtering and gap-filling<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h2>Processing Steps<\/h2>\n<ol>\n<li><code>METSCR<\/code> Meteoscreening<\/li>\n<li><code>BICO<\/code> Conversion of binary raw data files to ASCII files (CSV)<\/li>\n<li><code>FLUXRUN<\/code> OPENLAG flux processing with relaxed processing settings, identifies issues and checks correct lag time and wind directions, can be done without screened meteo data<\/li>\n<li><code>DYCO<\/code> Preparation of CSV files for final flux calculations: detect and remove lags and lag time jumps, <span style=\"text-decoration: underline;\">for QCL and LGR only and only if CO2 is available on the laser gas analyzer.<br \/>\n<\/span><\/li>\n<li><code>FLUXRUN<\/code> Production of <strong>Level-1<\/strong> fluxes, calculations with final processing settings and screened meteo data<\/li>\n<li>CORRECTIONS: might be necessary, e.g. IRGA75 vs IRGA72 fluxes comparison for Burba correction<\/li>\n<li><code>AMP<\/code> Production of <strong>Level-2<\/strong> fluxes (full QC), removal of low quality fluxes, removal of outliers, preparation for next step<\/li>\n<li><code>REDDYPROC<\/code> Production of <strong>Level-3<\/strong> and <strong>Level-4<\/strong> fluxes: ustar filtering, gap-filling and partitioning<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<h2>More info<\/h2>\n<ul>\n<li>Info about <a href=\"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/data\/ecosystem-fluxes\/flux-processing-chain\/\" target=\"_blank\" rel=\"noopener noreferrer\">flux levels<\/a><\/li>\n<li>Currently <a href=\"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/data\/available-flux-products\/\" target=\"_blank\" rel=\"noopener noreferrer\">available flux products<\/a><\/li>\n<li>Example for post-processing to create a finished flux product (FP): <a href=\"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/documentation\/ch-dav-fp2020-1997-2019\/\" target=\"_blank\" rel=\"noopener noreferrer\">CH-DAV FP2020 (1997-2019)<\/a><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Meeting date: 3 Mar 2021, 10h Participants: *** &nbsp; Goal of FF-202101 Goal 1: Final fluxes (FF) for selected site years Goal 2: Final flux product (FP) for all FFs &nbsp; Purpose of this meeting Fluxes for multiple site years are currently updated or newly calculated, started in January 2021. . . . <a class=\"readmore-link\" href=\"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/2021\/03\/03\/flux-processing-meeting-2-for-ff-202101\/\">Read more<\/a><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"no","_lmt_disable":"","ngg_post_thumbnail":0,"footnotes":""},"categories":[340],"tags":[],"coauthors":[314],"class_list":["post-9088","post","type-post","status-publish","format-standard","hentry","category-flux-processing-meeting"],"acf":[],"modified_by":"Lukas H\u00f6rtnagl","_links":{"self":[{"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/posts\/9088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/comments?post=9088"}],"version-history":[{"count":11,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/posts\/9088\/revisions"}],"predecessor-version":[{"id":12150,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/posts\/9088\/revisions\/12150"}],"wp:attachment":[{"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/media?parent=9088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/categories?post=9088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/tags?post=9088"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/www.swissfluxnet.ethz.ch\/index.php\/wp-json\/wp\/v2\/coauthors?post=9088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}