{"id":1293,"date":"2021-07-02T09:57:04","date_gmt":"2021-07-02T07:57:04","guid":{"rendered":"https:\/\/urbag.eu\/?p=1293"},"modified":"2021-07-02T09:57:04","modified_gmt":"2021-07-02T07:57:04","slug":"publication-in-jgr-atmospheres","status":"publish","type":"post","link":"https:\/\/webs.uab.cat\/atmosphere\/2021\/07\/02\/publication-in-jgr-atmospheres\/","title":{"rendered":"Publication in JGR Atmospheres"},"content":{"rendered":"

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See full article\/ Veure l’article complet: https:\/\/doi.org\/10.1029\/2020JD034106<\/a><\/strong><\/p>\n

English:<\/strong><\/p>\n

Cities are implementing additional urban green as a means to capture CO2<\/sub>\u00a0and become more carbon neutral. However, cities are complex systems where anthropogenic and natural components of the CO2<\/sub>\u00a0budget interact with each other, and the ability to measure the efficacy of such measures is still not properly addressed. There is still a high degree of uncertainty in determining the contribution of the vegetation signal, which furthermore confounds the use of CO2<\/sub>\u00a0mole fraction measurements for inferring anthropogenic emissions of CO2<\/sub>. Carbonyl sulfide (OCS) is a tracer of photosynthesis which can aid in constraining the biosphere signal. This study explores the potential of using OCS to track the urban biosphere signal. We used the Sulfur Transport and dEposition Model (STEM) to simulate the OCS concentrations and the Carnegie Ames Stanford Approach ecosystem model to simulate global CO2<\/sub>\u00a0fluxes over the Bay Area of San Francisco during March 2015. Two observation towers provided measurements of OCS and CO2<\/sub>: The Sutro tower in San Francisco (upwind from the area of study providing background observations), and a tower located at Sandia National Laboratories in Livermore (downwind of the highly urbanized San Francisco region). Our results show that the STEM model works better under stable marine influence, and that the boundary layer height and entrainment are driving the diurnal changes in OCS and CO2<\/sub>\u00a0at the downwind Sandia site. However, the STEM model needs to better represent the transport and boundary layer variability, and improved estimates of gross primary productivity for characterizing the urban biosphere signal are needed.<\/p>\n

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Catal\u00e0:<\/strong><\/p>\n

Les ciutats estan implementant el verd urb\u00e0 addicional com a mitj\u00e0 per capturar CO2<\/sub> \u00a0i esdevenir m\u00e9s neutre en carboni. No obstant aix\u00f2, les ciutats s\u00f3n sistemes complexos on els components antropog\u00e8nics i naturals de CO2<\/sub>\u00a0 interactuen entre si, i la capacitat de mesurar l’efic\u00e0cia d’aquestes mesures encara no s’aborda correctament. Encara hi ha un alt grau d’incertesa a l’hora de determinar la contribuci\u00f3 del senyal vegetal, que a m\u00e9s confon l’\u00fas de mesures de fracci\u00f3 molar per inferir emissions antropog\u00e8niques de CO2<\/sub>. \u00a0El sulfur de carbonil (OCS) \u00e9s un tra\u00e7ador de la fotos\u00edntesi que pot ajudar a restringir la senyal de la biosfera. Aquest estudi explora el potencial de l’\u00fas de l’OCS per fer un seguiment de la senyal de la biosfera urbana. Hem utilitzat el \u201cSulfur Transport and Deposition Model\u201d (STEM) per simular les concentracions de l’OCS i el model de l’ecosistema \u201cCarnegie Ames Stanford Approach\u201d per simular fluxos globals de CO2<\/sub>\u00a0 sobre l’\u00e0rea de la badia de San Francisco durant el mar\u00e7 de 2015. \u00a0Dues torres d’observaci\u00f3 ens van proporcionar mesures d’OCS i CO2<\/sub>: la torre Sutro de San Francisco (a contravent de l’\u00e0rea d’estudi que proporciona observacions de fons), i una torre situada als Laboratoris Nacionals Sandia a Livermore (a la part baixa de la regi\u00f3 de San Francisco, altament urbanitzada). Els nostres resultats mostren que el model STEM funciona millor sota una influ\u00e8ncia marina estable, i que l’al\u00e7ada i l’arrossegament de la capa l\u00edmit estan impulsant els canvis di\u00fcrns en OCS i CO2<\/sub>\u00a0 a contravent (Sandia). No obstant aix\u00f2, el model STEM ha de representar millor la variabilitat de la capa de transport i l\u00edmit, i es necessiten estimacions millorades de la productivitat prim\u00e0ria bruta per caracteritzar la senyal de biosfera urbana.<\/p>\n

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Figure 1:<\/strong> Domain characterization based on United States Geological Survey land categories used for the simulation. The Sandia site is in the city of Livermore, 72\u00a0km downwind from the Sutro site located in San Francisco.<\/p>\n

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Figure 4: <\/strong>Observations from flasks collected at Sutro tower for atmospheric mole fractions of carbonyl sulfide and CO2<\/sub>\u00a0from October 2007 to December 2015.<\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Title: Exploring the Potential of Using Carbonyl Sulfide to Track the Urban Biosphere Signal \/ <\/p>\n

Cities are implementing additional urban green as a means to capture CO2 and become more carbon neutral. However, cities are complex systems where anthropogenic and natural components of the CO2 budget interact with each other, and the ability to measure the efficacy of such measures is still not properly addressed. <\/p>\n","protected":false},"author":3153,"featured_media":1306,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[80,21,81,82,83,84,85],"class_list":["post-1293","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general","tag-carbonyl-sulfide","tag-co2","tag-ocs","tag-san-francisco","tag-sandia","tag-sutro","tag-united-states"],"_links":{"self":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1293","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/users\/3153"}],"replies":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/comments?post=1293"}],"version-history":[{"count":0,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/posts\/1293\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media\/1306"}],"wp:attachment":[{"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/media?parent=1293"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/categories?post=1293"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/webs.uab.cat\/atmosphere\/wp-json\/wp\/v2\/tags?post=1293"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}