Impacts of two types of El Niño events on Spring Surface Air Temperature over Sri Lanka

Dynamics of Atmospheres and Oceans, Год журнала: 2024, Номер unknown, С. 101517 - 101517

Опубликована: Ноя. 1, 2024

Язык: Английский

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Predictability of the atmospheric circulation patterns in Africa, south of the equator, using variations of the Southern Annular Mode and ENSO

Theoretical and Applied Climatology, Год журнала: 2024, Номер 155(6), С. 4641 - 4651

Опубликована: Март 4, 2024

Abstract The contribution of the El Niño Southern Oscillation (ENSO) and Annular Mode (SAM) to variations leading modes atmospheric circulation in Africa south equator, during austral summer (i.e., from December March), is examined this study. rotated principal component analysis applied classify study region. result showed that relatively, through control sea level pressure mid-latitudes, SAM more related variability Overall, period, explained about 20% 46% variance modes. ENSO rather explains up 10% variance. Due continuous nature circulation, incorporating co-variability classified patterns adds skill predictability joint SAM, ENSO, other less frequent regional are modes, 80% modes—which indeed an added value further considering natural gradient patterns.

Язык: Английский

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Impacts of Two Types of El Niño Events on Spring Surface Air Temperature Over Sri Lanka

Опубликована: Янв. 1, 2024

Язык: Английский

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Evaluating the spatiotemporal dynamics of agrometeorological droughts in semi-arid Gwayi agroecosystems (1990–2020) using multiple indices

Geomatics Natural Hazards and Risk, Год журнала: 2024, Номер 15(1)

Опубликована: Окт. 10, 2024

Climate variability poses a significant threat to smallholder farmers in the Gwayi catchment, Zimbabwe. This study investigated spatiotemporal dynamics of agrometeorological droughts from 1990 2020 using Standardized Precipitation Index (SPI), Evapotranspiration (SPEI), Vegetation Condition (VCI), and Health (VHI). The triangulation these indices provided comprehensive understanding drought dynamics. Severe extreme events were identified 1995, 1998, 2005, 2016, 2018, 2020, while moderate consistently detected across all indices. Favourable conditions observed 2000 2006. A strong positive correlation (r = 0.88) between VHI VCI suggests their similar effectiveness reflecting vegetation health. In contrast, correlations SPI 0.30), SPEI 0.39), 0.28), 0.40) indicate that capture complementary information, not only precipitation deficits but also impacts temperature, soil moisture, land cover changes. displayed 0.78), aligning sensitivity evapotranspiration. Spatial analysis revealed pronounced north-south gradient, with southwestern region being particularly vulnerable, underscoring need for targeted interventions.

Язык: Английский

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Impact of Indian Ocean dipole on Pacific blocking frequency during boreal autumn

Climate Dynamics, Год журнала: 2024, Номер 63(1)

Опубликована: Дек. 20, 2024

Язык: Английский

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