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Spatial trends of extreme precipitation events in the Paraná river basin

Rafee, Sameh A.Abou LU ; Freitas, Edmilson D. ; Martins, Jorge A. LU ; Martins, Leila D. LU ; Domingues, Leonardo M. ; Nascimento, Janaína M.P. ; Machado, Carolyne B. ; Santos, Eliane B. ; Rudke, Anderson P. and Fujita, Thais , et al. (2020) In Journal of Applied Meteorology and Climatology 59(3). p.443-454
Abstract

This work presents an analysis of the observed trends in extreme precipitation events in the Paraná River basin (PRB) from 1977 to 2016 (40 yr) based on daily records from 853 stations. The Mann–Kendall test and inverse-distance-weighted interpolation were applied to annual and seasonal precipitation and also for four extreme precipitation indices. The results show that the negative trends (significance at 95% confidence level) in annual and seasonal series are mainly located in the northern and northeastern parts of the basin. In contrast, except in the autumn season, positive trends were concentrated in the southern and southeastern regions of the basin, most notably for annual and summer precipitation. The spatial distributions of... (More)

This work presents an analysis of the observed trends in extreme precipitation events in the Paraná River basin (PRB) from 1977 to 2016 (40 yr) based on daily records from 853 stations. The Mann–Kendall test and inverse-distance-weighted interpolation were applied to annual and seasonal precipitation and also for four extreme precipitation indices. The results show that the negative trends (significance at 95% confidence level) in annual and seasonal series are mainly located in the northern and northeastern parts of the basin. In contrast, except in the autumn season, positive trends were concentrated in the southern and southeastern regions of the basin, most notably for annual and summer precipitation. The spatial distributions of the indices of annual maximum 5-day precipitation and number of rainstorms indicate that significant positive trends are mostly located in the south-southeast part of the basin and that significant negative trends are mostly located in the north-northeast part. The index of the annual number of dry days shows that 88% of significant trends are positive and that most of these are located in the northern region of the PRB, which is a region with a high number of consecutive dry days (>90). The simple daily intensity index showed the highest number of stations (263) with mostly positive significant trends.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Applied Meteorology and Climatology
volume
59
issue
3
pages
12 pages
publisher
Amer Meteorological Soc
external identifiers
  • scopus:85083971824
ISSN
1558-8424
DOI
10.1175/JAMC-D-19-0181.1
language
English
LU publication?
yes
id
3a12c8ac-805c-4c87-b46f-d7d066d45ee5
date added to LUP
2020-05-08 08:07:05
date last changed
2024-03-20 08:57:19
@article{3a12c8ac-805c-4c87-b46f-d7d066d45ee5,
  abstract     = {{<p>This work presents an analysis of the observed trends in extreme precipitation events in the Paraná River basin (PRB) from 1977 to 2016 (40 yr) based on daily records from 853 stations. The Mann–Kendall test and inverse-distance-weighted interpolation were applied to annual and seasonal precipitation and also for four extreme precipitation indices. The results show that the negative trends (significance at 95% confidence level) in annual and seasonal series are mainly located in the northern and northeastern parts of the basin. In contrast, except in the autumn season, positive trends were concentrated in the southern and southeastern regions of the basin, most notably for annual and summer precipitation. The spatial distributions of the indices of annual maximum 5-day precipitation and number of rainstorms indicate that significant positive trends are mostly located in the south-southeast part of the basin and that significant negative trends are mostly located in the north-northeast part. The index of the annual number of dry days shows that 88% of significant trends are positive and that most of these are located in the northern region of the PRB, which is a region with a high number of consecutive dry days (&gt;90). The simple daily intensity index showed the highest number of stations (263) with mostly positive significant trends.</p>}},
  author       = {{Rafee, Sameh A.Abou and Freitas, Edmilson D. and Martins, Jorge A. and Martins, Leila D. and Domingues, Leonardo M. and Nascimento, Janaína M.P. and Machado, Carolyne B. and Santos, Eliane B. and Rudke, Anderson P. and Fujita, Thais and Souza, Rodrigo A.F. and Hallak, Ricardo and Uvo, C. I.N.T.I.A.B.}},
  issn         = {{1558-8424}},
  language     = {{eng}},
  month        = {{03}},
  number       = {{3}},
  pages        = {{443--454}},
  publisher    = {{Amer Meteorological Soc}},
  series       = {{Journal of Applied Meteorology and Climatology}},
  title        = {{Spatial trends of extreme precipitation events in the Paraná river basin}},
  url          = {{http://dx.doi.org/10.1175/JAMC-D-19-0181.1}},
  doi          = {{10.1175/JAMC-D-19-0181.1}},
  volume       = {{59}},
  year         = {{2020}},
}