Detection of Rossby waves in multi-parameters in multi-mission satellite observations and HYCOM simulations in the Indian Ocean

Subrahmanyam, Bulusu; Heffner, David M.; Cromwell, D.; Shriver, Jay F.

doi:10.1016/j.rse.2009.02.017

Cited by 21 publications

(21 citation statements)

References 31 publications

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“…In this study, we use the same version of the model used by Heffner et al (2008) and Subrahmanyam et al (2009Subrahmanyam et al ( ) over the 2003Subrahmanyam et al ( -2006 period. It uses global HYCOM simulations with a daily temporal resolution, a 1/12 • horizontal resolution (∼7 km at mid-latitudes), and 32 hybrid vertical layers.…”

Section: Hybrid Coordinate Ocean Modelmentioning

confidence: 99%

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Altimetric Observations and Model Simulations of Coastal Kelvin Waves in the Bay of Bengal

2012

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in the tropical Indian Ocean reveal dominant annual Kelvin waves in the equatorial wave guide and dominant semiannual Kelvin waves off Sumatra coast and along the coastal Bay of Bengal. This study reveals variability in the propagation of upwelling Kelvin wave during winter and summer monsoons and downwelling Kelvin wave during monsoon transitions. Further, the winter transition downwelling Kelvin wave largely affects the coastal circulation of India.

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Section: Hybrid Coordinate Ocean Modelmentioning

confidence: 99%

“…The wavelet analysis was earlier used by Subrahmanyam et al (2009) to study the Rossby wave characteristics in the Indian Ocean. The wavelet method allows one to analyze localized power variations within a discrete time series at a range of scales (Foufoula-Georgiou and Kumar 1994).…”

Section: Wavelet Analysesmentioning

confidence: 99%

Altimetric Observations and Model Simulations of Coastal Kelvin Waves in the Bay of Bengal

2012

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“…Described in the 1930s by Carl-Gustav Rossby, oceanic Rossby waves were observed for the first time from in situ data by Emery and Magaard (1976); McWilliams and Flierl (1976), and studied in numerical models by Barnier (1986); Kirtman (1997); Subrahmanyam et al (2009), and many others. The advent of precise satellite altimetry in the 1990s provided an observational basis that allows the identification of propagating features through measurements of the sea surface height anomaly (SSHA).…”

Section: Observations Of Westward Propagationmentioning

confidence: 98%

Corrigendum to “Characterization of westward propagating signals in the South Atlantic from altimeter and radiometer records” [Remote Sens. Environ., 134: 367–376]

Oliveira

Polito

2013

Remote Sensing of Environment

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“…1). The choice of RoSSSby was influenced by the studies of Rossby waves in SSS in ocean models (Heffner et al, 2008;Subrahmanyam et al, 2009) and from Aquarius (Menezes et al, 2014).…”

Section: Datamentioning

confidence: 99%

“…Rossby waves remain dynamically important at the larger scales, and in recent years, with the ability to measure SSS from space, a number of studies have considered the potential for observing Rossby wave signals in salinity. Both Heffner, Subrahmanyam, and Shriver (2008) and Subrahmanyam, Heffner, Cromwell, and Shriver (2009) have calculated Rossby wave speeds in the SIO based on output from the Hybrid Coordinate Ocean Model (HYCOM; http://hycom.org/). Both studies show an equatorwards increase in Rossby wave speeds from 30°S to about 10°S (~5 cm/s to 23 cm/s), in agreement with theoretical mode 1 Rossby wave speeds based on Blundell (2003a, 2003b).…”

Section: Introductionmentioning

confidence: 99%

Reduced ascending/descending pass bias in SMOS salinity data demonstrated by observing westward-propagating features in the South Indian Ocean

Banks

Srokosz

Cipollini

et al. 2016

Remote Sensing of Environment

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a b s t r a c tThe European Space Agency (ESA) Soil Moisture and Ocean Salinity (SMOS) satellite has been providing data, including sea surface salinity (SSS) measurements, for more than five years. However, the operational ESA Level 2 SSS data are known to have significant spatially and temporally varying biases between measurements from ascending passes (SSS A ) and measurements from descending passes (SSS D ). This paper demonstrates how these biases are reduced through the use of SSS anomalies. Climatology products are constructed using SMOS Level 2 data to provide daily, one-degree by one-degree climatologies separately for ascending and descending passes using a moving window approach (in time and space). The daily, one-degree products can then be averaged to provide values of climatological SSS at different spatial and/or temporal resolutions.The averaged values of the SMOS climatology products are in good general agreement with data from the World Ocean Atlas 2013. However, there are significant differences at high latitudes, as well as in coastal and dynamic regions, as found by previous studies. Both the mean and standard deviation of the differences between data from ascending passes and data from descending passes for the anomalies are reduced compared with those obtained using the original salinity values. Geophysical signals are clearly visible in the anomaly products and an example is shown in the Southern Indian Ocean of westward-propagating signals that we conclude represent the surface expression of Rossby waves or large-scale non-linear eddies. The signals seen in salinity data agree (in speed) with those from sea surface temperature and sea surface height and are consistent with previous studies.

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Detection of Rossby waves in multi-parameters in multi-mission satellite observations and HYCOM simulations in the Indian Ocean

Cited by 21 publications

References 31 publications

Altimetric Observations and Model Simulations of Coastal Kelvin Waves in the Bay of Bengal

Altimetric Observations and Model Simulations of Coastal Kelvin Waves in the Bay of Bengal

Corrigendum to “Characterization of westward propagating signals in the South Atlantic from altimeter and radiometer records” [Remote Sens. Environ., 134: 367–376]

Reduced ascending/descending pass bias in SMOS salinity data demonstrated by observing westward-propagating features in the South Indian Ocean

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