Author, as appears in the article.: Andreas Randriamarolaza, Luc Yannick; Aguilar, Enric; Skrynyk, Oleg; Vicente-Serrano, Sergio M.; Dominguez-Castro, Fernando;

Department: Geografia

URV's Author/s: Aguilar Anfrons, Enrique Modesto / Randriamarolaza, Luc Yannick Andréas

Keywords: Variability Trends Stream flow Spatial coherence Quality control Precipitation indices Minimum temperatures Meteorological station Maximum temperature Inqc Indian-ocean Homogeneity test Homer Extreme temperature Endemism Drought characteristics Diurnal temperature ranges Daily temperatures Daily homogenization Climind Climatol Climate-change Climate trends Climate indices Climate change

Abstract: This study updates knowledge on climate evolution in Madagascar from 1950 to 2018. Changes were analyzed using annual and seasonal climate indices at regional and station level. The original daily series of minimum and maximum temperature and precipitation obtained from 28 meteorological stations were quality controlled and homogenized. Thirty-seven (37) climate indices were obtained from the daily series. The results show that changes in temperature had a higher degree of spatial coherence than changes in precipitation. Trends for temperature indices were mostly significant at 0.05 level and compatible with warming. Changes in minimum temperatures were greater than those for the maximum, leading to a significant decrease in the diurnal temperature range (DTR). Warm nights increased more than warm days, (0.70 days.decade(-1)) and cold nights decreased more than cold days, (0.21 days.decade(-1)). In addition, we found more stations with significant trends for very cold nights (92.60%) than for very warm days (51.80%) but they progressed differently (decrease and increase, respectively). Station-by-station precipitation index trends were mostly non-significant at 0.05 level, and most regional precipitation index showed decreasing trends. A shift in precipitation magnitude was observed around 2000-2018, a period of intensified drying (where 70.40% of stations recorded non-significant decreasing trends). An analysis of drought characteristics (i.e., intensity, magnitude and duration) highlighted the situation, especially in the south-east at an annual timescale.

Research group: Centre en Canvi Climàtic (C3)

Thematic Areas: Planejamento urbano e regional / demografia Meteorology & atmospheric sciences Interdisciplinar Geociências Engenharias iii Engenharias i Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência da computação Biodiversidade Atmospheric science

licence for use: https://creativecommons.org/licenses/by/3.0/es/

Author's mail: enric.aguilar@urv.cat lucyannickandreas.randriamarolaza@estudiants.urv.cat

Author identifier: 0000-0002-8384-377X

Record's date: 2023-02-23

Papper version: info:eu-repo/semantics/publishedVersion

Link to the original source: https://rmets.onlinelibrary.wiley.com/doi/10.1002/joc.7243

Licence document URL: http://repositori.urv.cat/ca/proteccio-de-dades/

Papper original source: International Journal Of Climatology. 42 (1): 265-288

APA: Andreas Randriamarolaza, Luc Yannick; Aguilar, Enric; Skrynyk, Oleg; Vicente-Serrano, Sergio M.; Dominguez-Castro, Fernando; (2022). Indices for daily temperature and precipitation in Madagascar, based on quality-controlled and homogenized data, 1950-2018. International Journal Of Climatology, 42(1), 265-288. DOI: 10.1002/joc.7243

Article's DOI: 10.1002/joc.7243

Entity: Universitat Rovira i Virgili

Journal publication year: 2022

Publication Type: Journal Publications