ANALYSIS OF THE DOWNBURSTS OCCURRENCE IN BRAZIL
Keywords:Downburst. CAPE. CINE. Severe weather
Downbursts are meteorological phenomena formed from severe convective storms and give rise to strong gusts of wind. When there is intense entrainment of dry and cold air at high levels through the clouds of deep vertical development it is established a phenomenon called evaporative cooling. This phenomenon rise up masses of dense and cold air inside the cloud that keeps sustained by convective currents until the moment that the downward forces outweigh the upward forces. At this moment streams of descend air called downdrafts are established, they fall to the ground and then spread horizontally on a ring shape. This study aims to analyze the occurrence of this phenomenon in the southern Brazil through the characteristics that define the occurrence of downbursts suggested in the literature. Because of the importance of knowledge of the occurrence of environments in which downbursts are favorable to occur, it is analyzed the influence of index Convective Available Potential Energy (CAPE) and Convective Inhibition Index (CINE) on the occurrence of winds generated by downbursts.The results show that the use of indices CAPE and CINE on an isolated form in the definition of environments favorable to the occurrence of convective downbursts are not sufficient and is suggest the observation of other meteorological variables and index on this process. Through two case studies, it was observed winds from storms with characteristics of downbursts, thus it is observed the occurrence of the phenomenon in southern Brazil.
How to Cite
To access the DECLARATION AND TRANSFER OF COPYRIGHT AUTHOR’S DECLARATION AND COPYRIGHT LICENSE click here.
Ethical Guidelines for Journal Publication
The Ciência e Natura journal is committed to ensuring ethics in publication and quality of articles.
Conformance to standards of ethical behavior is therefore expected of all parties involved: Authors, Editors, Reviewers, and the Publisher.
Authors: Authors should present an objective discussion of the significance of research work as well as sufficient detail and references to permit others to replicate the experiments. Fraudulent or knowingly inaccurate statements constitute unethical behavior and are unacceptable. Review Articles should also be objective, comprehensive, and accurate accounts of the state of the art. The Authors should ensure that their work is entirely original works, and if the work and/or words of others have been used, this has been appropriately acknowledged. Plagiarism in all its forms constitutes unethical publishing behavior and is unacceptable. Submitting the same manuscript to more than one journal concurrently constitutes unethical publishing behavior and is unacceptable. Authors should not submit articles describing essentially the same research to more than one journal. The corresponding Author should ensure that there is a full consensus of all Co-authors in approving the final version of the paper and its submission for publication.
Editors: Editors should evaluate manuscripts exclusively on the basis of their academic merit. An Editor must not use unpublished information in the editor's own research without the express written consent of the Author. Editors should take reasonable responsive measures when ethical complaints have been presented concerning a submitted manuscript or published paper.
Reviewers: Any manuscripts received for review must be treated as confidential documents. Privileged information or ideas obtained through peer review must be kept confidential and not used for personal advantage. Reviewers should be conducted objectively, and observations should be formulated clearly with supporting arguments, so that Authors can use them for improving the paper. Any selected Reviewer who feels unqualified to review the research reported in a manuscript or knows that its prompt review will be impossible should notify the Editor and excuse himself from the review process. Reviewers should not consider manuscripts in which they have conflicts of interest resulting from competitive, collaborative, or other relationships or connections with any of the authors, companies, or institutions connected to the papers.