Gravity Wave Behavior in Lower Stratosphere During Tropical Cyclones Over the Bay of Bengal

Rakshit, Gargi; Jana, Soumyajyoti; Maitra, Animesh

doi:10.1029/2018rs006614

Cited by 9 publications

(11 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tropical cyclones (TCs) are identified to be the important source of gravity wave (Rakshit et al, ). Previous studies revealed that during deep convection and cyclonic storms, water vapor‐rich air from the upper troposphere enters to the lower stratosphere (LS) and ozone‐rich air from the lower stratosphere intrudes into upper troposphere, the phenomenon being known as stratosphere‐troposphere exchange (Grosvenor et al, ; Liao & Rind, ; Ravindra Babu et al, ; Ray & Rosenlof, ).…”

Section: Introductionmentioning

confidence: 99%

“…Researchers have used gravity wave activities in the lower stratosphere as a parameter to investigate TC and the storm path (Ibrahim et al, ; Rakshit et al, ). Enhancement of gravity wave potential energy have been observed before the actual occurrence of cyclones in the lower stratosphere using Constellation Observing System for Meteorology, Ionosphere and Climate GPS Radio Occultation data (Rakshit et al, ). It is also seen that gravity wave energy produced during tropical cyclones is higher than generated by local convections (Chane‐Ming et al, ).…”

Section: Introductionmentioning

confidence: 99%

“…Although MST radar, lidar, and very high frequency radar observations have eased GW studies with good temporal resolution over land areas, they are incapable to facilitate measurements over ocean (Chang et al, 1997;Das et al, 2012;Rastogi et al, 1996;Vincent & Eckermann, 1990;Worthington & Thomas, 1996;Yamamoto et al, 1987). To overcome this limitation GPS radio occultation measurements have been utilized to study GW activities over ocean (Baumgaertner & McDonald, 2007;Hocke & Tsuda, 2001;Rakshit et al, 2018;Wang & Alexander, 2010). However, it may be noted that GW studies using radio occultation data depend on the availability of the occultation points resulting into coarse spatial and temporal resolution.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gravity Wave Activities Associated With Convective Phenomena at a Tropical Location Near Land‐Sea Boundary

2020

Self Cite

View full text Add to dashboard Cite

The seasonal analysis of gravity wave activity has been made for the present tropical location, Kolkata (22.5726°N, 88.3639°E) using radiosonde and European Centre for Medium-Range Weather Forecasts 60 model level data. Gravity wave generated due to intense tropical cyclone Aila has also been investigated using European Centre for Medium-Range Weather Forecasts 91 model level data over the Indian region. The gravity wave energy calculated from temperature and wind perturbation profiles show a significant enhancement during convective activities as indicated by a low outgoing longwave radiation. The pattern of zonal and meridional wind shears plays an important role in determining the seasonal variation of gravity wave activities. An intrusion of water vapor into the lower stratosphere over the cyclone affected region is detected from European Centre for Medium-Range Weather Forecasts 91 model level data. The dominant vertical wavelengths of gravity waves in the range of 2.5-3.2 km are found from spectral analysis of wind and temperature perturbations during the tropical cyclone.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gravity Wave Activities Associated With Convective Phenomena at a Tropical Location Near Land‐Sea Boundary

2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The tropopause layer is often affected by the presence of the TC, and this is easily detectable by using the RO profiles. In particular, the high vertical resolution of RO profiles shows that the TC anvil top generates a double tropopause effect when it does not reach the tropopause level (Biondi et al, 2011b(Biondi et al, , 2013Vergados et al, 2014) and the tropical tropopause layer (TTL) thickness is reduced (Ravindra Babu et al, 2015;Venkat Ratnam et al, 2016). Deep convective towers, usually developed within the TC eyewall and rainbands, generate gravity waves (GWs) transporting energy to the upper atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Tropical cyclones vertical structure from GNSS radio occultation: an archive covering the period 2001–2018

Lasota

Steiner

Kirchengast

et al. 2020

Earth Syst. Sci. Data

View full text Add to dashboard Cite

Abstract. Tropical cyclones (TC) are natural destructive phenomena, which affect wide tropical and subtropical areas every year. Although the correct prediction of their tracks and intensity has improved over recent years, the knowledge about their structure and development is still insufficient. The Global Navigation Satellite System (GNSS) radio occultation (RO) technique can provide a better understanding of the TC because it enables us to probe the atmospheric vertical structure with high accuracy, high vertical resolution and global coverage in any weather conditions. In this work, we create an archive of co-located TC best tracks and RO profiles covering the period 2001–2018 and providing a complete view of the storms since the pre-cyclone status to the cyclone disappearance. We collected 1822 TC best tracks from the International Best Track Archive for Climate Stewardship and co-located them with 48 313 RO profiles from seven satellite missions processed by the Wegener Center for Climate and Global Change. We provide information about location and intensity of the TC, RO vertical profiles co-located within 3 h and 500 km from the TC eye centre, and exact information about temporal and spatial distance between the TC centre and the RO mean tangent point. A statistical analysis shows how the archive covers all the ocean basins and all the intensity categories well. We finally demonstrate the application of this dataset to investigate the vertical structure for one TC example case. All the data files, separately for each TC, are publicly available in NetCDF format at https://doi.org/10.25364/WEGC/TC-RO1.0:2020.1 (Lasota et al., 2020).

show abstract

“…Deep convective towers, usually developed within the TC eyewall and rainbands, generate Gravity Waves (GW) transporting energy to the upper atmosphere. The high vertical resolution of RO can reveal the GW spectral characteristics (Chane Ming et al, 2014) associated with the presence of the TC and show how the intensification of the TC creates LS GW (Chane Ming et al, 2014;Rakshit et al, 2018). A comprehensive review on the use of RO observations to study TCs is given by Bonafoni et al (2019).…”

Section: Introductionmentioning

confidence: 99%

Tropical cyclones vertical structure from GNSS radio occultation: an archive covering the period 2001–2018

Lasota¹,

Steiner²,

Kirchengast³

et al. 2020

Preprint

View full text Add to dashboard Cite

Abstract. Tropical Cyclones (TC) are natural destructive phenomena, which affect wide tropical and subtropical areas every year. Although the correct prediction of their tracks and intensity has improved over recent years, the knowledge about their structure and development is still insufficient. The Global Navigation Satellite System (GNSS) Radio Occultation (RO) technique can provide a better understanding of the TC because it enables to probe the atmospheric vertical structure with high accuracy, high vertical resolution, and global coverage in any weather conditions. In this work, we create an archive of co-located TC best tracks and RO profiles covering the period 2001–2018 and providing a complete view of the storms since the pre-cyclone status to the cyclone disappearance. We collected 1822 TC best tracks from the International Best Track Archive for Climate Stewardship and co-located them with 48313 RO profiles from seven satellite missions processed by Wegener Center for Climate and Global Change. We provide information about location and intensity of the TC, RO vertical profiles co-located within 3 hours and 500 km from the TC eye centre, and exact information about temporal and spatial distance between the TC centre and the RO mean tangent point. A statistical analysis shows how the archive well covers all the ocean basins and all the intensity categories. We finally demonstrate the application of this dataset to investigate the vertical structure for one TC example case. All the data files, separately for each TC, are publicly available in NetCDF format at https://doi.org/10.25364/WEGC/TC-RO1.0:2020.1 (Lasota et al., 2020).

show abstract

Gravity Wave Behavior in Lower Stratosphere During Tropical Cyclones Over the Bay of Bengal

Cited by 9 publications

References 49 publications

Gravity Wave Activities Associated With Convective Phenomena at a Tropical Location Near Land‐Sea Boundary

Gravity Wave Activities Associated With Convective Phenomena at a Tropical Location Near Land‐Sea Boundary

Tropical cyclones vertical structure from GNSS radio occultation: an archive covering the period 2001–2018

Tropical cyclones vertical structure from GNSS radio occultation: an archive covering the period 2001–2018

Contact Info

Product

Resources

About