García et al. (2007) Trends in Block-Seasonal Extreme Rainfall over the Iberian Peninsula in the Second Half of the Twentieth Century

⚠️ Warning: This summary was generated from the abstract only, as the full text was not available.

Identification

• Journal: Journal of Climate
• Year: 2007
• Date: 2007-01-01
• Authors: J. A. García, M. C. Gallego, A. Serrano, J. M. Vaquero
• DOI: 10.1175/jcli3995.1

Research Groups

Not explicitly stated in the abstract, but likely climate science or hydrology departments involved in regional climate analysis.

Short Summary

This study analyzed daily extreme rainfall trends over the Iberian Peninsula from 1958 to 1997 using two statistical approaches, revealing significant negative trends in the west and southwest during spring and winter.

Objective

• To detect and analyze trends in extreme rainfall over the Iberian Peninsula at a daily scale during the second half of the twentieth century (1958–1997).

Study Configuration

• Spatial Scale: Iberian Peninsula, using data from 35 evenly distributed stations.
• Temporal Scale: Daily scale, covering the period 1958–1997 (40 years).

Methodology and Data

• Models used:
  • Nonparametric Mann–Kendall test.
  • Sen method.
  • Statistical theory of extreme values, incorporating time-dependent parameters to reflect temporal changes in frequency distribution.
• Data sources: Observation data from 35 rainfall stations.

Main Results

• Results from both the nonparametric tests and the extreme value theory approach showed agreement, confirming the reliability of the analysis.
• Negative trends in extreme rainfall were found for the west and southwest regions of the Iberian Peninsula during spring and winter seasons.
• In autumn, a spatial dipolar pattern appeared, but the trends were less evident.

Contributions

• Confirmed the presence and reliability of extreme rainfall trends over the Iberian Peninsula by employing and cross-validating two distinct statistical methodologies (nonparametric and extreme value theory).
• Identified specific regional (west and southwest Iberian Peninsula) and seasonal (spring and winter) patterns of decreasing extreme rainfall.
• Highlighted a less evident, spatially dipolar pattern in autumn trends.

Funding

Not mentioned in the abstract.

Citation

@article{García2007Trends,
  author = {García, J. A. and Gallego, M. C. and Serrano, A. and Vaquero, J. M.},
  title = {Trends in Block-Seasonal Extreme Rainfall over the Iberian Peninsula in the Second Half of the Twentieth Century},
  journal = {Journal of Climate},
  year = {2007},
  doi = {10.1175/jcli3995.1},
  url = {https://doi.org/10.1175/jcli3995.1}
}