{"id":44992,"date":"2025-06-10T16:51:20","date_gmt":"2025-06-10T16:51:20","guid":{"rendered":"https:\/\/www.alicat.com\/?p=44992"},"modified":"2026-01-06T22:43:10","modified_gmt":"2026-01-06T22:43:10","slug":"universitat-kohlenstoffsulfid","status":"publish","type":"post","link":"https:\/\/www.alicat.com\/de\/articles\/university-carbon-sulfide\/","title":{"rendered":"Kohlenstoffkreislauf-Sulfid-Tracer-Modell"},"content":{"rendered":"

[et_pb_section fb_built=”1″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”2em||0px||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_heading title=”Validating OCS in PPT Dilutions to Improve Carbon Cycle Models” _builder_version=”4.27.4″ _module_preset=”default” custom_css_free_form=”selector h1 {|| text-wrap: pretty;||}” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_image src=”https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/lab-equipment.jpg” alt=”Photo of a research lab” align=”center” force_fullwidth=”on” _builder_version=”4.27.5″ _module_preset=”default” custom_margin=”1.5rem||||false|false” hover_enabled=”0″ custom_css_free_form=”selector img {|| object-fit: cover;||}” global_colors_info=”{}” theme_builder_area=”post_content” module_id=”article-hero-image” sticky_enabled=”0″][\/et_pb_image][et_pb_divider color=”#2A3B47″ divider_weight=”2.5px” _builder_version=”4.27.4″ _module_preset=”default” height=”0px” custom_margin=”3rem||3rem||true|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_divider][\/et_pb_column][\/et_pb_row][et_pb_row _builder_version=”4.27.4″ _module_preset=”default” custom_padding=”0px||0px||true|false” locked=”off” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_column type=”4_4″ _builder_version=”4.27.4″ _module_preset=”default” global_colors_info=”{}” theme_builder_area=”post_content”][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

The University of Arizona\u2019s Meredith lab is working to form climate models at parts\u2011per\u2011trillion (ppt) dilution levels to better understand the delicate balance of carbon cycles and their effect in climate change. By validating carbonyl sulfide (OCS) as a tracer molecule and observing its uptake in photosynthesis and the release of carbon respiration, the lab seeks to provide key insights into the future impact of global carbon levels.<\/p>\n

To accomplish this, Dr. Laura Meredith and her team required precise gas blending techniques to dilute and regulate OCS concentrations. This article explores their methods, and the advanced technologies used to aid in their research.<\/p>\n

One of the least understood aspects of the carbon cycle is the method by which carbon moves between the soil and atmosphere and how that movement is influenced by plant, fungal, and microbial communities. With the onset of climate change, it is critical to close this knowledge gap.<\/p>\n

Without a tracer molecule, however, it is difficult to determine how much carbon is taken up by photosynthesis vs. how much is released through respiration. Dr. Laura Meredith at the University of Arizona seeks to validate and use the tracer molecule, carbonyl sulfide (OCS), to learn about these complex relationships.<\/p>\n

[\/et_pb_text][et_pb_heading title=”Challenge: Accurately quantifying OCS uptake to create more robust climate change models” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

While OCS is taken up during photosynthesis, it is not respired. This means OCS can be used to gauge total carbon uptake by plants. It also provides insight into the distinct contributions of photosynthesis and respiration.<\/p>\n

[\/et_pb_text][et_pb_text quote_border_color=”#C11B29″ _builder_version=”4.27.4″ _module_preset=”default” quote_font=”||on||||||” quote_text_color=”#2A3B47″ custom_margin=”||2rem||false|false” custom_css_free_form=”selector blockquote {|| background-color: #f6f6f6;|| padding: 1rem;||}” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

\u201cIt’s important to be able to break this out because we can’t be confident that climate change will affect photosynthesis and respiration in the same way, which could create an imbalance in the system. To build better models, we need to be able to resolve and study these two processes independently. The balance between the two is critical to understanding how much carbon is kept in the ground vs. how much is released into the atmosphere.\u201d<\/p>\n

 <\/p>\n

\u2014 Dr. Laura Meredith<\/p><\/blockquote>\n

[\/et_pb_text][et_pb_heading title=”Solution: Diluting and flowing OCS molecules from 7 ppm to 50 \u2013 10,000 ppt with a turnkey gas mixer” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]<\/p>\n

The Meredith lab planned an experiment to determine the correlation between OCS concentration and subsequent OCS uptake. Understanding this relationship as well as the reaction parameters and required enzymes is key to determining the reaction rate and confirming the use of OCS as a tracer molecule.<\/p>\n

[\/et_pb_text][et_pb_image src=”https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/mxm-gas-mixer-prod.webp” alt=”FusionFlow MXM gas mixer permits ppt dilutions from ppm reference blends.” show_bottom_space=”off” align=”center” _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_image][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]To investigate the full range of the reaction, the team needed a way to vary the inflow concentrations of OCS from 50 ppt to 10,000 ppt. They acquired a\u00a0FusionFlow\u2122 turnkey gas blending system<\/a>, able to dilute a 7 ppm OCS gas source by more than five orders of magnitude, offering outcomes in the ppt dilutions needed. The Meredith lab can use this gas mixing system to test at a wide range of OCS concentrations with incremental changes, getting them closer to validating OCS as a tracer molecule.[\/et_pb_text][et_pb_heading title=”What\u2019s next for the Meredith lab?” _builder_version=”4.27.4″ _module_preset=”default” title_level=”h3″ global_colors_info=”{}” theme_builder_area=”post_content”][\/et_pb_heading][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” custom_margin=”||2rem||false|false” global_colors_info=”{}” theme_builder_area=”post_content”]Once the reaction rate of the microbial enzymes and fungal cultures is known, Dr. Meredith and her team can develop a model of OCS as a tracer for the carbon cycle. Dr. Meredith aims to independently establish similar models for other segments of an ecosystem, and then combine them to determine the total gas flux in the ecosystem. This combined model will be used to predict and better understand results from her lab’s field work in Alaska. There are few nighttime hours during the growing season in Alaska that allow other carbon cycle partitioning methods to be used, so having this model as a basis for their fieldwork will be instrumental.[\/et_pb_text][et_pb_text _builder_version=”4.27.4″ _module_preset=”default” module_alignment=”center” custom_margin=”||0px||false|false” custom_padding=”||2rem||false|false” custom_padding_last_edited=”off|desktop” custom_css_free_form=”selector figure {|| display: table;|| margin-left: auto;|| margin-right: auto;|| text-align: center;||}||||selector figcaption {|| caption-side: bottom;|| display: table-caption;||}||||selector img {|| margin-bottom: 1rem;||}” locked=”off” global_colors_info=”{}” custom_css_main_element_last_edited=”on|phone” theme_builder_area=”post_content”]<\/p>\n

\"Photo
Flux chamber at the Healy NEON site used to measure surface exchange of carbonyl sulfide and carbon dioxide with the atmosphere in light (as pictured above) and dark conditions (after covering with a dark cloth), using a portable mid-infrared trace gas analyzer.
Photo by Dr. Laura Meredith<\/figcaption><\/figure>\n

[\/et_pb_text][\/et_pb_column][\/et_pb_row][\/et_pb_section]<\/p>\n","protected":false},"excerpt":{"rendered":"

The University of Arizona\u2019s Meredith lab is working to form climate models at parts\u2011per\u2011trillion (ppt) dilution levels to better understand the delicate balance of carbon cycles and their effect in climate change. By validating carbonyl sulfide (OCS) as a tracer molecule and observing its uptake in photosynthesis and the release of carbon respiration, the lab […]<\/p>\n","protected":false},"author":24,"featured_media":44994,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_et_pb_use_builder":"on","_et_pb_old_content":"","_et_gb_content_width":"1400","content-type":"","_searchwp_excluded":"","footnotes":""},"categories":[110,156,140],"tags":[],"class_list":["post-44992","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-fusionflow","category-fusionflow-showcase","category-gas-mixing"],"acf":[],"yoast_head":"\nCarbon Cycle Sulfide Tracer Model - Alicat Scientific<\/title>\n<meta name=\"description\" content=\"The University of Arizona's Meredith Lab seeks to validate and use tracer molecules at ppt dilutions to optimize carbon cycle models.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.alicat.com\/de\/artikel\/universitat-kohlenstoffsulfid\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Carbon Cycle Sulfide Tracer Model\" \/>\n<meta property=\"og:description\" content=\"The University of Arizona's Meredith Lab seeks to validate and use tracer molecules at ppt dilutions to optimize carbon cycle models.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.alicat.com\/de\/artikel\/universitat-kohlenstoffsulfid\/\" \/>\n<meta property=\"og:site_name\" content=\"Alicat Scientific\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/alicatscientific\/\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-10T16:51:20+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-01-06T22:43:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/lab-equipment.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"619\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Jarod Kober\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Jarod Kober\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/\",\"url\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/\",\"name\":\"Carbon Cycle Sulfide Tracer Model - Alicat Scientific\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.alicat.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.alicat.com\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/lab-equipment.jpg\",\"datePublished\":\"2025-06-10T16:51:20+00:00\",\"dateModified\":\"2026-01-06T22:43:10+00:00\",\"description\":\"The University of Arizona's Meredith Lab seeks to validate and use tracer molecules at ppt dilutions to optimize carbon cycle models.\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.alicat.com\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/lab-equipment.jpg\",\"contentUrl\":\"https:\\\/\\\/www.alicat.com\\\/wp-content\\\/uploads\\\/2025\\\/06\\\/lab-equipment.jpg\",\"width\":1200,\"height\":619,\"caption\":\"Photo of a research lab\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/articles\\\/university-carbon-sulfide\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.alicat.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Carbon Cycle Sulfide Tracer Model\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/#website\",\"url\":\"https:\\\/\\\/www.alicat.com\\\/\",\"name\":\"Alicat Scientific\",\"description\":\"Alicat Scientific | Fastest Flow Measurement Possible\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.alicat.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.alicat.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/#organization\",\"name\":\"Alicat Scientific\",\"alternateName\":\"Alicat\",\"url\":\"https:\\\/\\\/www.alicat.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\\\/\\\/www.alicat.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"\",\"contentUrl\":\"\",\"caption\":\"Alicat Scientific\"},\"image\":{\"@id\":\"https:\\\/\\\/www.alicat.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/alicatscientific\\\/\",\"https:\\\/\\\/linkedin.com\\\/company\\\/alicat-scientific-inc\",\"https:\\\/\\\/www.youtube.com\\\/channel\\\/UCPPX4sBOO2eEu65Zn-EfwCw\"],\"email\":\"info@alicat.com\",\"telephone\":\"+18882906060\",\"legalName\":\"Alicat Scientific, Inc.\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Kohlenstoffkreislauf-Sulfid-Tracer-Modell - Alicat Scientific","description":"Das Meredith-Labor der Universit\u00e4t von Arizona versucht, Tracer-Molek\u00fcle in ppt-Verd\u00fcnnungen zu validieren und zu verwenden, um Kohlenstoffkreislaufmodelle zu optimieren.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.alicat.com\/de\/artikel\/universitat-kohlenstoffsulfid\/","og_locale":"de_DE","og_type":"article","og_title":"Carbon Cycle Sulfide Tracer Model","og_description":"The University of Arizona's Meredith Lab seeks to validate and use tracer molecules at ppt dilutions to optimize carbon cycle models.","og_url":"https:\/\/www.alicat.com\/de\/artikel\/universitat-kohlenstoffsulfid\/","og_site_name":"Alicat Scientific","article_publisher":"https:\/\/www.facebook.com\/alicatscientific\/","article_published_time":"2025-06-10T16:51:20+00:00","article_modified_time":"2026-01-06T22:43:10+00:00","og_image":[{"width":1200,"height":619,"url":"https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/lab-equipment.jpg","type":"image\/jpeg"}],"author":"Jarod Kober","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Jarod Kober","Est. reading time":"4\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/","url":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/","name":"Kohlenstoffkreislauf-Sulfid-Tracer-Modell - Alicat Scientific","isPartOf":{"@id":"https:\/\/www.alicat.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/#primaryimage"},"image":{"@id":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/lab-equipment.jpg","datePublished":"2025-06-10T16:51:20+00:00","dateModified":"2026-01-06T22:43:10+00:00","description":"Das Meredith-Labor der Universit\u00e4t von Arizona versucht, Tracer-Molek\u00fcle in ppt-Verd\u00fcnnungen zu validieren und zu verwenden, um Kohlenstoffkreislaufmodelle zu optimieren.","breadcrumb":{"@id":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/"]}]},{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/#primaryimage","url":"https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/lab-equipment.jpg","contentUrl":"https:\/\/www.alicat.com\/wp-content\/uploads\/2025\/06\/lab-equipment.jpg","width":1200,"height":619,"caption":"Photo of a research lab"},{"@type":"BreadcrumbList","@id":"https:\/\/www.alicat.com\/articles\/university-carbon-sulfide\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.alicat.com\/"},{"@type":"ListItem","position":2,"name":"Carbon Cycle Sulfide Tracer Model"}]},{"@type":"WebSite","@id":"https:\/\/www.alicat.com\/#website","url":"https:\/\/www.alicat.com\/","name":"Alicat Scientific","description":"Alicat Scientific | Schnellstm\u00f6gliche Durchflussmessung","publisher":{"@id":"https:\/\/www.alicat.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.alicat.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":"Organization","@id":"https:\/\/www.alicat.com\/#organization","name":"Alicat Scientific","alternateName":"Alicat","url":"https:\/\/www.alicat.com\/","logo":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.alicat.com\/#\/schema\/logo\/image\/","url":"","contentUrl":"","caption":"Alicat Scientific"},"image":{"@id":"https:\/\/www.alicat.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/alicatscientific\/","https:\/\/linkedin.com\/company\/alicat-scientific-inc","https:\/\/www.youtube.com\/channel\/UCPPX4sBOO2eEu65Zn-EfwCw"],"email":"info@alicat.com","telephone":"+18882906060","legalName":"Alicat Scientific, Inc."}]}},"_links":{"self":[{"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/posts\/44992","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/users\/24"}],"replies":[{"embeddable":true,"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/comments?post=44992"}],"version-history":[{"count":0,"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/posts\/44992\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/media\/44994"}],"wp:attachment":[{"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/media?parent=44992"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/categories?post=44992"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.alicat.com\/de\/wp-json\/wp\/v2\/tags?post=44992"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}