Radio occultation bending angle anomalies during tropical cyclones

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Radio occultation bending angle anomalies during tropical cyclones. / Biondi, Riccardo; Neubert, Torsten; Syndergaard, S.; Nielsen, J.

In: Atmospheric Measurement Techniques, Vol. 4, No. 6, 2011, p. 1053-1060.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

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Author

Biondi, Riccardo; Neubert, Torsten; Syndergaard, S.; Nielsen, J. / Radio occultation bending angle anomalies during tropical cyclones.

In: Atmospheric Measurement Techniques, Vol. 4, No. 6, 2011, p. 1053-1060.

Publication: Research - peer-reviewJournal article – Annual report year: 2011

Bibtex

@article{73e50038e961428da16dfd1f6a217746,
title = "Radio occultation bending angle anomalies during tropical cyclones",
publisher = "Copernicus GmbH",
author = "Riccardo Biondi and Torsten Neubert and S. Syndergaard and J. Nielsen",
year = "2011",
doi = "10.5194/amtd-4-1371-2011",
volume = "4",
number = "6",
pages = "1053--1060",
journal = "Atmospheric Measurement Techniques",
issn = "1867-1381",

}

RIS

TY - JOUR

T1 - Radio occultation bending angle anomalies during tropical cyclones

A1 - Biondi,Riccardo

A1 - Neubert,Torsten

A1 - Syndergaard,S.

A1 - Nielsen,J.

AU - Biondi,Riccardo

AU - Neubert,Torsten

AU - Syndergaard,S.

AU - Nielsen,J.

PB - Copernicus GmbH

PY - 2011

Y1 - 2011

N2 - The tropical deep convection affects the radiation balance of the atmosphere changing the water vapor mixing ratio and the temperature of the upper troposphere lower stratosphere. The aim of this work is to better understand these processes and to investigate if severe storms leave a significant signature in radio occultation profiles in the tropical tropopause layer. Using tropical cyclone best track database and data from different GPS radio occultation missions (COSMIC, GRACE, CHAMP, SACC and GPSMET), we selected 1194 profiles in a time window of 3 h and a space window of 300 km from the eye of the cyclone. We show that the bending angle anomaly of a GPS radio occultation signal is typically larger than the climatology in the upper troposphere and lower stratosphere and that a double tropopause during deep convection can easily be detected using this technique. Comparisons with co-located radiosondes, climatology of tropopause altitudes and GOES analyses are also shown to support the hypothesis that the bending angle anomaly can be used as an indicator of convective towers. The results are discussed in connection to the GPS radio occultation receiver which will be part of the Atomic Clock Ensemble in Space (ACES) payload on the International Space Station.

AB - The tropical deep convection affects the radiation balance of the atmosphere changing the water vapor mixing ratio and the temperature of the upper troposphere lower stratosphere. The aim of this work is to better understand these processes and to investigate if severe storms leave a significant signature in radio occultation profiles in the tropical tropopause layer. Using tropical cyclone best track database and data from different GPS radio occultation missions (COSMIC, GRACE, CHAMP, SACC and GPSMET), we selected 1194 profiles in a time window of 3 h and a space window of 300 km from the eye of the cyclone. We show that the bending angle anomaly of a GPS radio occultation signal is typically larger than the climatology in the upper troposphere and lower stratosphere and that a double tropopause during deep convection can easily be detected using this technique. Comparisons with co-located radiosondes, climatology of tropopause altitudes and GOES analyses are also shown to support the hypothesis that the bending angle anomaly can be used as an indicator of convective towers. The results are discussed in connection to the GPS radio occultation receiver which will be part of the Atomic Clock Ensemble in Space (ACES) payload on the International Space Station.

U2 - 10.5194/amtd-4-1371-2011

DO - 10.5194/amtd-4-1371-2011

JO - Atmospheric Measurement Techniques

JF - Atmospheric Measurement Techniques

SN - 1867-1381

IS - 6

VL - 4

SP - 1053

EP - 1060

ER -