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Dynamic cloud regimes, incident sunlight, and leaf temperatures in espeletia grandiflora and Chusquea tessellata, two representative species of the Andean Páramo, Colombia
dc.creator | Sánchez Andrade, Adriana | |
dc.creator | Posada Hostettler, Juan Manuel Roberto | spa |
dc.creator | Smith, William K. | spa |
dc.date.accessioned | 2020-05-25T23:58:41Z | |
dc.date.available | 2020-05-25T23:58:41Z | |
dc.date.created | 2014 | spa |
dc.description.abstract | The alpine páramo of Chingaza National Park, Colombia, has a highly variable cloud regime typical of many tropical alpine areas. Yet, little information is available regarding the effects of such dynamic sunlight regimes on alpine temperatures. A close association between changes in incident sunlight and corresponding air (Ta) and leaf (Tl) temperatures occurred in two dominant species with strongly contrasting leaf form and whole-plant architecture. Spikes in sunlight incidence of and gt;3000 ?mol m-2 s-1 occurred during cloud cover and corresponded to increases in Tl of 4-5 °C in a 1-min-interval in both species. Although Tl was predominately above Ta, during the day, depressions below Ta of over 6 °C occurred during cloudy conditions when photosynthetic photon flux density (PFDs) was and lt;400 ?mol m-2 s-1. The greatest frequency (69%) of changes in incident sunlight (PFDs; over 2-min intervals) was less than 100 ?mol m-2 s-1, although changes and gt;1000 ?mol m-2 s-1 occurred for 2.4% of the day, including a maximum change of 1512 ?mol m-2 s-1. These data may be valuable for predicting the ecophysiological impact of climate warming and associated changes in future cloud regimes experienced by tropical alpine species. | eng |
dc.format.mimetype | application/pdf | |
dc.identifier.doi | https://doi.org/10.1657/1938-4246-46.2.371 | |
dc.identifier.issn | 15230430 | |
dc.identifier.uri | https://repository.urosario.edu.co/handle/10336/22911 | |
dc.language.iso | eng | spa |
dc.publisher | Institute of Arctic and Alpine Research | spa |
dc.relation.citationEndPage | 378 | |
dc.relation.citationIssue | No. 2 | |
dc.relation.citationStartPage | 371 | |
dc.relation.citationTitle | Arctic, Antarctic, and Alpine Research | |
dc.relation.citationVolume | Vol. 46 | |
dc.relation.ispartof | Arctic, Antarctic, and Alpine Research, ISSN:15230430, Vol.46, No.2 (2014); pp. 371-378 | spa |
dc.relation.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84902194634&doi=10.1657%2f1938-4246-46.2.371&partnerID=40&md5=c50c6fecea2ddea3f9a0a332cb24daa1 | spa |
dc.rights.accesRights | info:eu-repo/semantics/openAccess | |
dc.rights.acceso | Abierto (Texto Completo) | spa |
dc.source.instname | instname:Universidad del Rosario | spa |
dc.source.reponame | reponame:Repositorio Institucional EdocUR | spa |
dc.subject.keyword | Air temperature | spa |
dc.subject.keyword | Climate change | spa |
dc.subject.keyword | Cloud cover | spa |
dc.subject.keyword | Dicotyledon | spa |
dc.subject.keyword | Ecophysiology | spa |
dc.subject.keyword | Solar radiation | spa |
dc.subject.keyword | Tundra | spa |
dc.subject.keyword | Andes | spa |
dc.subject.keyword | Chingaza national park | spa |
dc.subject.keyword | Colombia | spa |
dc.title | Dynamic cloud regimes, incident sunlight, and leaf temperatures in espeletia grandiflora and Chusquea tessellata, two representative species of the Andean Páramo, Colombia | spa |
dc.type | article | eng |
dc.type.hasVersion | info:eu-repo/semantics/publishedVersion | |
dc.type.spa | Artículo | spa |