Large-Scale Variability Over Mediterranean Associated with the Indian Summer Monsoon

Rizou, Despoina; Flocas, H. A.; Athanasiadis, Panos; Bartzokas, A.

doi:10.1007/978-3-642-29172-2_99

Cited by 1 publication

(3 citation statements)

References 11 publications

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“…These results are in agreement with the wind vector anomaly pattern at 850 hPa (see Fig. 8a) for strong ISM years, where an anomalous northerly current is prevalent over eastern and central Mediterranean (Rizou et al, 2012). The anomaly composite related to weak ISM years reveals a similar spatial distribution as in the strong years, though reversed.…”

Section: Ism and Lower Level Circulationsupporting

confidence: 89%

“…As a result, enhanced northerlies appear to be dominating over EM in the strong ISM years, as concluded from the 850 hPa meridional wind anomalies, with an impact on the temperature regime of the region (Rizou et al, 2012). Enhanced subsidence over the EM, which appears synchronously with enhanced ascend over the Indo-Pakistan region, induces adiabatic warming counteracting the cool advection due to these anomalous northerly winds (Etesians).…”

Section: Discussionmentioning

confidence: 93%

“…The examination of the weak composite (Fig. 2b) reveals a meridional shift of the subtropical jet (STJ) in the central Asia region equatorward, as compared with its climatological mean position (Rizou et al, 2012) as well as a weakening of the STJ over the central Asia and of the tropical easterly jet (TEJ) intensity over the Thar desert, in northern Indo-Pakistan region. Conversely, the phases of the zonal wind anomaly in the strong ISM years (Fig.…”

Section: Ism and Upper Level Circulationmentioning

confidence: 99%

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Relationship between the Indian summer monsoon and the large-scale circulation variability over the Mediterranean

Rizou

Flocas

Athanasiadis

et al. 2015

Atmospheric Research

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In this study the impact of the Indian summer monsoon on the large scale variability of the atmospheric circulation over the Mediterranean is investigated on an inter-annual time scale. Composite and correlation analysis results are presented, outlining different circulation patterns in the upper and lower troposphere for strong and weak monsoon years respectively. For this purpose ERA-40 Reanalysis monthly mean data at various isobaric levels together with the standardized All India Rainfall Index for boreal summer (June-July-August-September) of a 44-year period were employed. During strong monsoon years many atmospheric circulation systems appear strengthened over Eurasia, resembling a well-organized Rossby wave train over the area. In the upper troposphere a meridional shift of the jet streams over the examined area was also identified during extreme monsoon years. On the other hand, in the lower troposphere enhanced northerlies (Etesians) appear to dominate over Eastern Mediterranean along with intensified subsidence during strong monsoon years.