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Radio Occultation Bending Angle Anomalies During Tropical Cyclones : Volume 4, Issue 6 (15/06/2011)

By Biondi, R.

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Book Id: WPLBN0003974058
Format Type: PDF Article :
File Size: Pages 8
Reproduction Date: 2015

Title: Radio Occultation Bending Angle Anomalies During Tropical Cyclones : Volume 4, Issue 6 (15/06/2011)  
Author: Biondi, R.
Volume: Vol. 4, Issue 6
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
2011
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Nielsen, J. K., Syndergaard, S., Biondi, R., & Neubert, T. (2011). Radio Occultation Bending Angle Anomalies During Tropical Cyclones : Volume 4, Issue 6 (15/06/2011). Retrieved from http://www.ebooklibrary.org/


Description
Description: DTU Space, National Space Institute, Copenhagen, Denmark. 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.

Summary
Radio occultation bending angle anomalies during tropical cyclones

Excerpt
Anthes, R. A., Bernhardt, P. A., Chen, Y., Cucurull, L., Dymond, K. F., Ector, D., Healy, S. B., Ho, S.-H., Hunt, D. C., Kuo, Y.-H., Liu, H., Manning, K., McCormick, C., Meehan, T. K., Randel, W. J., Rocken, C., Schreiner, W. S., Sokolovskiy, S. V., Syndergaard, S., Thompson, D. C., Trenberth, K. E., Wee, T.-K., Yen, N. L., and Zeng, Z.: The COSMIC/Formosat/3 mission: Early results, B. Amer. Meteor. Soc., 89, 313–333, 2008.; Beyerle, G., Schmidt, T., Michalak, G., Heise, S., Wickert, J., and Reigber, Ch.: GPS radio occultation with GRACE: Atmospheric Profiling utilizing the zero difference technique, Geophys. Res. Lett., 32, L13806, doi:10.1029/2005GL023109, 2005.; Biondi, R., Neubert, T., Syndergaard, S., and Nielsen, J.: Measurements of the upper troposphere and lower stratosphere during tropical cyclones using the GPS radio occultation technique, Adv. Space Res., 47, 348–355, 2011.; Cairo, F., Buontempo, C., MacKenzie, A. R., Schiller, C., Volk, C. M., Adriani, A., Mitev, V., Matthey, R., Di Donfrancesco, G., Oulanovsky, A., Ravegnani, F., Yushkov, V., Snels, M., Cagnazzo, C., and Stefanutti, L.: Morphology of the tropopause layer and lower stratosphere above a tropical cyclone: a case study on cyclone Davina (1999), Atmos. Chem. Phys., 8, 3411–3426, doi:10.5194/acp-8-3411-2008, 2008.; Chaboureau, J.-P., Cammas, J.-P., Duron, J., Mascart, P. J., Sitnikov, N. M., and Voessing, H.-J.: A numerical study of tropical cross-tropopause transport by convective overshoots, Atmos. Chem. Phys., 7, 1731–1740, doi:10.5194/acp-7-1731-2007, 2007.; Chae, J. H., Wu, D. L., Read, W. G., and Sherwood, S. C.: The role of tropical deep convective clouds on temperature, water vapor, and dehydration in the tropical tropopause layer (TTL), Atmos. Chem. Phys., 11, 3811–3821, doi:10.5194/acp-11-3811-2011, 2011.; Danielsen, E. F.: A dehydration mechanism for the stratosphere, Geophys. Res. Lett., 9, 605–608, 1982.; Schmetz, J., Tjembs, S. A., Gube, M., and Van de Berg, L.: Monitoring deep convection and convective overshooting with Meteosat, Adv. Space Res., 19, 433–441, 1997.; Danielsen, E. F.: In situ evidence of rapid, vertical, irreversible transport of lower tropospheric air into the lower tropical stratosphere by convective cloud turrets and by larger-scale upwelling in tropical cyclones, J. Geophys. Res., 98, 8665–8681, 1993.; Forster, P. M. and Shine, K. P.: Stratospheric water vapour changes as a possible contributor to observed stratospheric cooling, Geophys. Res. Lett., 26, 3309–3312, 1999.; Forster, P. M. and Shine, K. P.: Assessing the climate climate impact of trends in stratospheric water vapor, Geophys. Res. Lett., 29, 101–102, 2002.; Fueglistaler, S., Dessler, A. E., Dunkerton, T. J., Folkins, I., Fu, Q., and Mote, P. W.: Tropical tropopause layer, Rev. Geophys., 47, RG1004, doi:10.1029/2008RG000267, 2009.; Hajj, G. A., Ao, C. O., Iijima, B. A., Kuang, D., Kursinski, E. R., Mannucci, A. J., Meehan, T. K., Romans, L. J., de La Torre Juarez, M., and Yunck, T. P.: CHAMP and SAC-C atmospheric occultation results and intercomparisons, J. Geophys. Res., 109, D06109, doi:10.1029/2003JD003909, 2004.; Kim, H. C.: The effect of deep convection on temperatures in the tropical tropopause layer and its implications to the regulation of tropical lower stratospheric humidity, PhD Thesis, University of Houston, USA, 2005.; Kley, D., Schmeltekopf, A. L., Kelly, K., Winkler, R. H., Thompson, T. L., and McFarland, M.: Transport of water through the tropical tropopause, Geophys. Res. Lett., 9, 617–620, 1982.; Kuo, Y. H., Wee, T. K., Sokolovskiy, S., Rocken, C., Schreiner

 

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