A Study on the Lower Tropospheric Thermal Inversion Over the Arabian Sea Using Radiosonde and IASI Data

Dwivedi, Sanjeev; Sathiyamoorthy, V.; Narayanan, M. S.; Rao, D. Narayana

doi:10.1109/jstars.2015.2506759

Cited by 3 publications

(8 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The west coast station (Salalah) exhibits a typical temperature profile as discussed by Dwivedi et al . (2016b). The mean profile of temperature shows a decreasing pattern from surface up to the height of 1 km, and an increasing pattern between 1.5 and 2 km followed by a decreasing pattern thereafter.…”

Section: Resultsmentioning

confidence: 99%

“…Considering the first 12‐hr of simulation as model spin up, we combined the remaining 24‐hr outputs from each simulation to generate a single 37‐year climate dataset. To study the variability and trends in the intensity of MI, we considered two distinct regions (shown in Figure 1) over the Arabian Sea: the Western Arabian Sea (WAS, 17°–20°N and 58°–61°E) and the Eastern Arabian Sea (EAS, 17°–20°N and 69°–72°E) as adopted in recent MI studies (e.g., Dwivedi et al ., 2016b).…”

Section: Methodsmentioning

confidence: 99%

“…The MI significantly influences the exchange of moisture and energy between the ocean surfaces (Narayanan and Rao, 1981) and is primarily characterized by the temperature gradient and inversion depth over the Arabian Sea (Dwivedi et al ., 2016a). The MI index is often quantified based on the gradient method that is, the difference in temperature between 850 and 950 hPa levels [Δ T = T 850hPa − T 950hPa )] and its intensity as the positive value of Δ T (Narayanan and Rao, 1981; Dwivedi et al, 2016a, 2016b). Previous studies have linked the formation of the MI during the monsoon to the large‐scale evolution of the monsoon low level jet (MLLJ), which induces enhanced upwelling conditions that in turn results in cooler ocean surface conditions over the WAS (Warnecke et al ., 1971; Honjo et al ., 1999; Wu et al ., 2018; Sooraj et al ., 2019).…”

Section: Introductionmentioning

confidence: 99%

“…By analysing the temperature profiles of IASI sounder, Dwivedi et al . (2016b) showed that warmer conditions mainly prevail between the 900–850 hPa pressure levels and established a temperature‐based criterion (950–850 hPa) for detecting MI after a detailed examination of Δ T at several locations and considering all lower tropospheric levels (viz. 1,000–900, 1,000–850 hPa, etc.).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Variability of monsoon inversion over the Arabian Sea and its impact on rainfall

Dwivedi

Viswanadhapalli

Ratnam

et al. 2020

Intl Journal of Climatology

Self Cite

View full text Add to dashboard Cite

This work investigates the spatial and temporal variability of the monsoon inversion (MI) over the Arabian Sea for the study of 37-years period (1980-2016) using MERRA version2 (MERRA2) reanalysis and downscaled simulations generated with the Weather and Research Forecasting (WRF) model. After validating the downscaled products with the observations from four radiosonde stations (Salalah, Mumbai, Goa and Mangalore), we analysed

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Variability of monsoon inversion over the Arabian Sea and its impact on rainfall

Dwivedi

Viswanadhapalli

Ratnam

et al. 2020

Intl Journal of Climatology

Self Cite

View full text Add to dashboard Cite

show abstract

“…This information on T criterion has been used as the reference in the present study. In this regard, it is worth to quote the recent study by Dwivedi et al (2016) who has reported observations of temperature inversions during July-August over Muscat and Salah (east Saudi Arabian coast) from concurrent radiosonde and IASI data.…”

Section: Dropsonde and Radiosonde Measurements Monex (1979)mentioning

confidence: 99%

Characteristics of monsoon inversions over the Arabian Sea observed by satellite sounder and reanalysis data sets

et al. 2016

Self Cite

View full text Add to dashboard Cite

Abstract. Monsoon inversion (MI) over the Arabian Sea (AS) is one of the important characteristics associated with the monsoon activity over Indian region during summer monsoon season. In the present study, we have used 5 years (2009-2013) of temperature and water vapour measurement data obtained from satellite sounder instrument, an Infrared Atmospheric Sounding Interferometer (IASI) onboard MetOp satellite, in addition to ERA-Interim data, to study their characteristics. The lower atmospheric data over the AS have been examined first to identify the areas where MIs are predominant and occur with higher strength. Based on this information, a detailed study has been made to investigate their characteristics separately in the eastern AS (EAS) and western AS (WAS) to examine their contrasting features. The initiation and dissipation times of MIs, their percentage occurrence, strength, etc., has been examined using the huge database. The relation with monsoon activity (rainfall) over Indian region during normal and poor monsoon years is also studied. WAS T values are ∼ 2 K less than those over the EAS, T being the temperature difference between 950 and 850 hPa. A much larger contrast between the WAS and EAS in T is noticed in ERA-Interim data set vis-à-vis those observed by satellites. The possibility of detecting MI from another parameter, refractivity N, obtained directly from another satellite constellation of GPS Radio Occultation (RO) (COSMIC), has also been examined. MI detected from IASI and Atmospheric Infrared Sounder (AIRS) onboard the NOAA satellite have been compared to see how far the two data sets can be combined to study the MI characteristics. We suggest MI could also be included as one of the semipermanent features of southwest monsoon along with the presently accepted six parameters.

show abstract

Formation and maintenance of monsoon inversion over the Arabian Sea

Dwivedi,

Pandit,

Jangid

et al. 2023

Theor Appl Climatol

View full text Add to dashboard Cite

A Study on the Lower Tropospheric Thermal Inversion Over the Arabian Sea Using Radiosonde and IASI Data

Cited by 3 publications

References 13 publications

Variability of monsoon inversion over the Arabian Sea and its impact on rainfall

Variability of monsoon inversion over the Arabian Sea and its impact on rainfall

Characteristics of monsoon inversions over the Arabian Sea observed by satellite sounder and reanalysis data sets

Formation and maintenance of monsoon inversion over the Arabian Sea

Contact Info

Product

Resources

About