Detection of monsoon inversion by TIROS-N satellite

Narayanan, M. S.; Rao, B. V. Appa

doi:10.1038/294546a0

Cited by 33 publications

(23 citation statements)

References 3 publications

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“…Transportation of eolian material to the interior of the Arabian Sea is therefore strongly dependent upon the moist southwesterly winds of the summer monsoon (Tindale and Pease, 1999). Accordingly, the spatial extent of 13 C-depleted plant wax fatty acids (Figure 4a) and high dolomite accumulation rates ( Figure 5) correlate well with the approximate position of the monsoon inversion during an active phase, as determined by Narayanan and Rao (1981, Figure 6). This suggests that the west-to-east δ 13 C gradient in the Arabian Sea can potentially be used as an indicator of the position of the monsoon inversion, and therefore of the relationship between the southwesterly and northwesterly winds, and, by extension, the intensity of the southwest monsoon.…”

Section: Controls On the Deposition Of Plant Waxes In The Arabian Seasupporting

confidence: 50%

“…When the southwest monsoon is strong, the inversion is confined to the region west of 65 • E (Narayanan and Rao, 1981). The transportation of dust and other eolian material is therefore blocked from the interior of the Arabian Sea.…”

Section: Controls On the Deposition Of Plant Waxes In The Arabian Seamentioning

confidence: 99%

“…The height of the boundary between the two air masses, known as the monsoon inversion, increases from west to east and depends upon the strength of the southwest winds (Narayanan and Rao, 1981). When the southwest monsoon is strong, the inversion is confined to the region west of 65 • E (Narayanan and Rao, 1981).…”

Section: Controls On the Deposition Of Plant Waxes In The Arabian Seamentioning

confidence: 99%

“…The isoline (hand-drawn) highlights sites with sites with C 4 contributions of less than 75%. Findlater (1969) and Narayanan and Rao (1981).…”

Section: Indus Fanmentioning

confidence: 99%

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Terrigenous plant wax inputs to the Arabian Sea: Implications for the reconstruction of winds associated with the Indian Monsoon

Dahl

Oppo

Eglinton

et al. 2005

Geochimica et Cosmochimica Acta

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We have determined the accumulation rates and carbon isotopic compositions (δ 13 C) of longchain (C 24 -C 32 ) terrigenous plant wax fatty acids in 19 surface sediment samples geographically distributed throughout the Arabian Sea in order to assess the relationship between plant wax inputs and the surrounding monsoon wind systems. Both the accumulation rate data and the δ 13 C data show that there are three primary eolian sources of plant waxes to the Arabian Sea: Africa, Asia, and the Arabian Peninsula. These sources correspond to the three major wind systems in this region: the summer (Southwest) monsoon, the winter (Northeast)

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Section: Controls On the Deposition Of Plant Waxes In The Arabian Seasupporting

confidence: 50%

Section: Controls On the Deposition Of Plant Waxes In The Arabian Seamentioning

confidence: 99%

Section: Controls On the Deposition Of Plant Waxes In The Arabian Seamentioning

confidence: 99%

“…The isoline (hand-drawn) highlights sites with sites with C 4 contributions of less than 75%. Findlater (1969) and Narayanan and Rao (1981).…”

Section: Indus Fanmentioning

confidence: 99%

See 2 more Smart Citations

Terrigenous plant wax inputs to the Arabian Sea: Implications for the reconstruction of winds associated with the Indian Monsoon

Dahl

Oppo

Eglinton

et al. 2005

Geochimica et Cosmochimica Acta

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“…[16] It is important to note that over the Arabian Sea, particularly in the west and northwest parts, strong thermal inversion is present in the lower troposphere [Narayanan and Rao, 1981;Narayanan et al, 2004]. In Figure 8a, monthly average radiosonde-derived temperature and relative humidity profiles of August 2012 over Muscat, Oman (58.28°E; 23.59°N), situated on the northwest coast of the Arabian Sea are shown.…”

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confidence: 99%

Characteristics of low clouds over the Arabian Sea

et al. 2013

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[1] This paper studies climatically important low clouds (with cloud top below 680 hPa) over the Arabian Sea using the Kalpana-1 satellite data and International Satellite Cloud Climatology Project cloud data. Characteristics and possible mechanisms behind low-cloud formation in the summer monsoon season are presented. The dominant lower tropospheric circulation over the Arabian Sea during the summer season is the monsoon low-level jet (LLJ). Low clouds are predominantly found on the exit portion of the LLJ with decelerating winds. We postulate that the moisture carried by the LLJ from the entrance region with accelerating winds converge at the exit region with decelerating winds. This low-level convergence (observed~925 hPa level) may be conducive for moisture convergence, parcel uplifting, and low-cloud formation. These clouds are unable to grow vertically due to the presence of lower tropospheric thermal inversion. Change in the spatial extent of low-level convergence is found to influence the spatial coverage of the low clouds. It is found that low cloud cover is inversely related to the Indian summer monsoon activity. It is speculated that the changes in the strength of the lower tropospheric stability and spatial extent of convergence may be possible causes behind the observed inverse relation between low cloud cover and monsoon activity. Based on Clouds and the Earth's Radiant Energy System data, we find that these low clouds exert a peak cooling of about À55 Wm À2 .

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Atmospheric Thermal Changes Over the Indian Region Prior to the Monsoon Onset as Observed by Satellite Sounding Data

Joshi

Simon

Desai

1990

Intl Journal of Climatology

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The differential heating of the continents and the adjoining oceans is the primary cause for the summer monsoon circulation over South Asia. Two important synoptic climatological features associated with this are: the thermal heat low centred over Pakistan and adjoining areas; and the upper tropospheric high over the Tibetan Plateau. These two aspects relating to the onset phase of the monsoon are examined utilizing: (i) the data from the National Oceanic and Atmospheric Administration polar-orbiting satellite for the year 1982 and (ii) the FGGE level 111-b data for the year 1979.

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Detection of monsoon inversion by TIROS-N satellite

Cited by 33 publications

References 3 publications

Terrigenous plant wax inputs to the Arabian Sea: Implications for the reconstruction of winds associated with the Indian Monsoon

Terrigenous plant wax inputs to the Arabian Sea: Implications for the reconstruction of winds associated with the Indian Monsoon

Characteristics of low clouds over the Arabian Sea

Atmospheric Thermal Changes Over the Indian Region Prior to the Monsoon Onset as Observed by Satellite Sounding Data

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