visitant ::
identificació
|
|||||||||||||||
Cerca | Lliura | Ajuda | Servei de Biblioteques | Sobre el DDD | Català English Español |
Pàgina inicial > Articles > Articles publicats > Exploring the influence of land use on the urban carbonyl sulfide budget : |
Data: | 2023 |
Descripció: | 21 pàg. |
Resum: | Carbonyl sulfide (OCS) is used to quantify the carbon capture potential of the biosphere because of its direct correlation with CO2 uptake during photosynthesis. However, to constrain the urban biosphere signal, it is necessary to evaluate potential anthropogenic sources. We conducted two sampling campaigns in the Metropolitan Area of Barcelona (AMB), Spain, during May (full COVID lockdown) and October 2020 to measure the spatial distribution and variability of OCS in four urban land uses as follows: built, urban forest, urban park, and peri-urban agriculture. The OCS background levels determined at Tibidabo (442 m asl) were approximately 484 ± 20 ppt and 407 ± 8 ppt for May and October 2020, respectively, and agreed with other seasonal surveys conducted in Europe during that same period. Averaged emissions were in the range of +Δ12 ± 40 ppt for the city and were +Δ9. 4 ± 40. 9 ppt for urban +Δ22. 1 ± 48 ppt for urban green +Δ20. 7 ± 42. 9 ppt for agricultural and −Δ4. 8 ± 19. 6 ppt for forest. The urban values ranged from neutral to above background, suggesting nearby anthropogenic and marine emissions such as +Δ150 ppt in Montjuic, which is downwind of Barcelona's harbor. During the crop-growing season in May, the agricultural areas consistently showed values below the background (up to −Δ76 ppt in Gavà, uptake) at 7:00 UTC when the land breezes were dominant, while later in the morning, when the sea breeze are developed, the plant sink is masked by the transport of marine emissions. Urban forests located north of Tibidabo showed OCS values up to −Δ70 ppt, suggesting significant uptake by urban forests. We conclude that determining the urban biosphere signal using OCS as a tracer is more complex than expected because the marine and anthropogenic emissions from the port strongly impact the spatial-temporal distribution of OCS. |
Ajuts: | European Commission 818002 Ministerio de Ciencia e Innovación PID2020-113614RB-C21 Ministerio de Ciencia e Innovación CEX2019-000940-M Ministerio de Economía, Industria y Competitividad PRE2018-085425 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00734 Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00574 |
Nota: | Altres ajuts: acords transformatius de la UAB |
Nota: | Unidad de excelencia María de Maeztu CEX2019-000940-M |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Carbonyl sulfide ; Coastal city ; OCS urban sources ; Urban biosphere signal ; Urban classes |
Publicat a: | Journal of Geophysical Research. Atmospheres, Vol. 128, Issue 24 (December 2023) , p. e2023JD039497, ISSN 2169-8996 |
21 p, 2.8 MB |