Interannual characteristics of rainfall over Madagascar and its relationship with the Indian Ocean sea surface temperature variation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10453408" target="_blank" >RIV/00216208:11320/22:10453408 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Gc0_tfdc7Z" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=Gc0_tfdc7Z</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s00704-022-03950-8" target="_blank" >10.1007/s00704-022-03950-8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Interannual characteristics of rainfall over Madagascar and its relationship with the Indian Ocean sea surface temperature variation

Popis výsledku v původním jazyce

Understanding rainfall variability over a region is essential for economic development since it contributes to managing climate-sensitive sectors. This study assesses the interannual characteristics of rainfall over Madagascar and the possible influence of the Indian Ocean (IO) on rainfall patterns between 1950 and 2018, using monthly rainfall data from the Climatic Research Unit. The singular value decomposition analysis was used to examine the effect of IO&apos;s sea surface temperature (SST) on the rainfall variability, followed by a composite analysis of vertically integrated moisture flux. Overall, both the wet and dry seasons showed a slight decrease in rainfall trends during the past 69 years. During the wet (dry) season, the central and southeastern (western) IO SST were positively correlated with Madagascar&apos;s rainfall. The covariability analysis showed that a positive phase of the Subtropical Indian Ocean Dipole or Indian Ocean Dipole results in increased rainfall over the northwestern (northern) and southern parts of Madagascar during the wet (dry) season. The composite analysis suggests that enhanced (decreased) rainfall during the wet (dry) years of the wet and dry seasons in Madagascar is linked to a strong moisture convergence (divergence) accompanied by strong easterlies (anticyclonic circulation) over the northwestern (southern) IO. The study findings could drive further studies on other likely factors that impact the country&apos;s rainfall.

Název v anglickém jazyce

Interannual characteristics of rainfall over Madagascar and its relationship with the Indian Ocean sea surface temperature variation

Popis výsledku anglicky

Understanding rainfall variability over a region is essential for economic development since it contributes to managing climate-sensitive sectors. This study assesses the interannual characteristics of rainfall over Madagascar and the possible influence of the Indian Ocean (IO) on rainfall patterns between 1950 and 2018, using monthly rainfall data from the Climatic Research Unit. The singular value decomposition analysis was used to examine the effect of IO&apos;s sea surface temperature (SST) on the rainfall variability, followed by a composite analysis of vertically integrated moisture flux. Overall, both the wet and dry seasons showed a slight decrease in rainfall trends during the past 69 years. During the wet (dry) season, the central and southeastern (western) IO SST were positively correlated with Madagascar&apos;s rainfall. The covariability analysis showed that a positive phase of the Subtropical Indian Ocean Dipole or Indian Ocean Dipole results in increased rainfall over the northwestern (northern) and southern parts of Madagascar during the wet (dry) season. The composite analysis suggests that enhanced (decreased) rainfall during the wet (dry) years of the wet and dry seasons in Madagascar is linked to a strong moisture convergence (divergence) accompanied by strong easterlies (anticyclonic circulation) over the northwestern (southern) IO. The study findings could drive further studies on other likely factors that impact the country&apos;s rainfall.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10509 - Meteorology and atmospheric sciences

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Theorectical and Applied Climatology

ISSN

0177-798X

e-ISSN

1434-4483

Svazek periodika

148

Číslo periodika v rámci svazku

1-2

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

14

Strana od-do

349-362

Kód UT WoS článku

000749137600001

EID výsledku v databázi Scopus

2-s2.0-85123841765