{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,12]],"date-time":"2025-10-12T04:39:46Z","timestamp":1760243986381,"version":"build-2065373602"},"reference-count":37,"publisher":"MDPI AG","issue":"3","license":[{"start":{"date-parts":[[2009,2,26]],"date-time":"2009-02-26T00:00:00Z","timestamp":1235606400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/3.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>The ability of altimetry to detect extreme low pressure events and the relationship between sea level pressure and sea level anomalies during extra-tropical depressions have been investigated. Specific altimeter treatments have been developed for tropical cyclones and applied to obtain a relevant along-track sea surface height (SSH) signal: the case of tropical cyclone Isabel is presented here. The S- and C-band measurements are used because they are less impacted by rain than the Ku-band, and new sea state bias (SSB) and wet troposphere corrections are proposed. More accurate strong altimeter wind speeds are computed thanks to the Young algorithm. Ocean signals not related to atmospheric pressure can be removed with accuracy, even within a Near Real Time context, by removing the maps of sea level anomaly (SLA) provided by SSALTO\/Duacs. In the case of Extra-Tropical Depressions, the classical altimeter processing can be used. Ocean signal not related to atmospheric pressure is along-track filtered. The sea level pressure (SLP)-SLA relationship is investigated for the North Atlantic, North Pacific and Indian oceans; three regression models are proposed allowing restoring an altimeter SLP with a mean error of 5 hPa if compared to ECMWF or buoys SLP. The analysis of barotropic simulation outputs points out the regional variability of the SLP\/Model Sea Level relationship and the wind effects.<\/jats:p>","DOI":"10.3390\/s90301306","type":"journal-article","created":{"date-parts":[[2009,3,1]],"date-time":"2009-03-01T04:04:25Z","timestamp":1235880265000},"page":"1306-1329","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Observing and Studying Extreme Low Pressure Events with Altimetry"],"prefix":"10.3390","volume":"9","author":[{"given":"Loren","family":"Carr\u00e8re","sequence":"first","affiliation":[{"name":"CLS, 8-10 rue Herm\u00e8s, 31520 Ramonville St Agne, France"}]},{"given":"Fran\u00e7oise","family":"Mertz","sequence":"additional","affiliation":[{"name":"CLS, 8-10 rue Herm\u00e8s, 31520 Ramonville St Agne, France"}]},{"given":"Joel","family":"Dorandeu","sequence":"additional","affiliation":[{"name":"CLS, 8-10 rue Herm\u00e8s, 31520 Ramonville St Agne, France"}]},{"given":"Yves","family":"Quilfen","sequence":"additional","affiliation":[{"name":"IFREMER, Z.I. Pointe du Diable B.P. 70, 29280 Plouzan\u00e9, France"}]},{"given":"Jerome","family":"Patoux","sequence":"additional","affiliation":[{"name":"University of Washington, Box 351640 Seattle WA 98195-1640, USA"}]}],"member":"1968","published-online":{"date-parts":[[2009,2,26]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1043","DOI":"10.1029\/2000GL011646","article-title":"QuickSCAT\u2019s Sea winds facilitates early identification of tropical depressions in 1999 hurricane season","volume":"28","author":"Katsaros","year":"2001","journal-title":"Geophys. Res. Lett"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"7767","DOI":"10.1029\/97JC01911","article-title":"Structures of tropical cyclones observed by high resolution scatterometry","volume":"103","author":"Quilfen","year":"1998","journal-title":"J. Geophys. Res"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"573","DOI":"10.1029\/2003EO510001","article-title":"Ocean thermal structure monitoring could aid in the intensity forecast of tropical cyclones","volume":"84","author":"Goni","year":"2003","journal-title":"Eos"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1366","DOI":"10.1175\/1520-0493(2000)128<1366:EOAWOF>2.0.CO;2","article-title":"Effects of a warm oceanic feature on hurricane Opal","volume":"128","author":"Shay","year":"2000","journal-title":"Mon. Wea. Rev"},{"key":"ref_5","first-page":"131","article-title":"The Jason-1 Mission","volume":"26","author":"Fu","year":"2003","journal-title":"Mar. Geodesy"},{"key":"ref_6","first-page":"1275","article-title":"Modelling the barotropic response of the global ocean to atmospheric wind and pressure forcing \u2013 comparisons with observations","volume":"30","author":"Lyard","year":"2003","journal-title":"Geophys. Res. Lett"},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"961","DOI":"10.1029\/96JC02920","article-title":"Relation between sea level and barometric pressure determined from altimeter data and model simulations","volume":"102","author":"Gaspar","year":"1997","journal-title":"J. Geophys. Res"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"8033","DOI":"10.1029\/94JC00217","article-title":"Understanding the relation between wind and pressure driven sea level variability","volume":"99","author":"Ponte","year":"1994","journal-title":"J. Geophys. Res"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"15587","DOI":"10.1029\/1999JC900113","article-title":"Regional analysis of the inverted barometer effect over the global ocean using T\/P data and model results","volume":"104","author":"Ponte","year":"1999","journal-title":"J. Geophys. Res"},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"79","DOI":"10.1029\/96RG03037","article-title":"Atmospheric loading and the oceanic inverted barometer effect","volume":"35","author":"Wunch","year":"1997","journal-title":"Rev. Geophys"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1080\/03091927009365774","article-title":"Linear theory on the response of a two layer ocean to moving hurricane","volume":"1","author":"Geisler","year":"1970","journal-title":"Geophys. Astrophys. Fluid Dynam"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"23","DOI":"10.1175\/1520-0485(1997)027<0023:FSEOTN>2.0.CO;2","article-title":"Free surface effects on the near-inertial ocean current response to a hurricane: a revisit","volume":"27","author":"Shay","year":"1997","journal-title":"J. Phys. Oceanogr"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/S0167-6105(98)00131-7","article-title":"The HRD real-time hurricane wind analysis system","volume":"77\u201378","author":"Powell","year":"1998","journal-title":"J. Wind Eng. Ind. Aerodyn"},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1175\/1520-0450(1982)021<0261:AOLSMP>2.0.CO;2","article-title":"An operational large-scale marine planetary boundary layer model","volume":"2","author":"Brown","year":"1982","journal-title":"J. Appl. Meteorol"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"813","DOI":"10.1175\/1520-0450(2003)042<0813:GPFFSW>2.0.CO;2","article-title":"Global Pressure Fields from Scatterometer Winds","volume":"42","author":"Patoux","year":"2003","journal-title":"J. Appl. Meteorol"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"3225","DOI":"10.1029\/2002JC001428","article-title":"Impact or rain cell on scatterometer data. 1. Theory and modelling","volume":"108","author":"Tournadre","year":"2003","journal-title":"J. Geophys. Res"},{"key":"ref_17","unstructured":"Ablain, M., and Philips, S. CLS-DOS-NT-06-302; http:\/\/www.jason.oceanobs.com\/documents\/calval\/validation_report\/annual_report_j1_2007.pdf."},{"key":"ref_18","unstructured":"Picot, N., Case, K., Desai, S., and Vincent, P. (AVISO and PODAAC User Handbook. IGDR and GDR Jason-1 Products, Edition 3.0, 2006). AVISO and PODAAC User Handbook. IGDR and GDR Jason-1 Products, Edition 3.0, SMM-MU-M5-OP-13184-CN (AVISO), JPL D-21352 (PODAAC):."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1029\/RG010i001p00001","article-title":"Bermuda sea level in relation to tides, weather, and baroclinic variations","volume":"10","author":"Wunsch","year":"1972","journal-title":"Rev. Geophys"},{"key":"ref_20","unstructured":"Hernandez, F., and Schaeffer, P. (Altimetric Mean Sea Surfaces and Gravity Anomaly maps inter-comparisons; AVISO technical report, n\u00b0 AVI-NT-011-5242-CLS, 2000). Altimetric Mean Sea Surfaces and Gravity Anomaly maps inter-comparisons; AVISO technical report, n\u00b0 AVI-NT-011-5242-CLS, CLS Ed.; Ramonville St Agne,."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"6957","DOI":"10.1029\/2000JC000241","article-title":"Departure from the local inverse barometer model observed in altimeter and tide gauge data and in a global barotropic numerical model","volume":"106","author":"Mathers","year":"2001","journal-title":"J. Geophys. Res"},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"20987","DOI":"10.1029\/97JC01475","article-title":"Steric and wind induced changes in T\/P large scale sea surface topography observations","volume":"102","author":"Stammer","year":"1997","journal-title":"J. Geophys. Res"},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"19477","DOI":"10.1029\/2000JC900063","article-title":"Global high resolution mapping of ocean circulation from T\/P and ERS1\/2","volume":"105","author":"Ducet","year":"2000","journal-title":"J. Geophys. Res"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"1117","DOI":"10.1109\/36.628780","article-title":"The effects of rain on TOPEX\/Poseidon altimeter data: a new rain flag based on Ku and C band backscatter coefficients","volume":"35","author":"Tournadre","year":"1997","journal-title":"IEEE Trans. Geosci. Remote Sens"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"20275","DOI":"10.1029\/93JC02117","article-title":"An estimate of the Geosat altimeter wind speed algorithm at high wind speeds","volume":"98","author":"Young","year":"1993","journal-title":"J. Geophys. Res"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"C01004","DOI":"10.1029\/2005JC003068","article-title":"Altimeter dual-frequency observations of surface winds, waves and rain rate in tropical cyclone Isabel","volume":"111","author":"Quilfen","year":"2006","journal-title":"J. Geophys. Res"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"802","DOI":"10.1175\/JTECH1878.1","article-title":"First three years of the Microwave Radiometer Aboard ENVISAT. In-flight calibration, Processing and Validation of the geophysical products","volume":"23","author":"Obligis","year":"2006","journal-title":"J. Atmos. Ocean. Technol"},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1109\/36.485108","article-title":"The microwave radiometer aboard ERS1. Part II - Validation of the geophysical products","volume":"34","author":"Eymard","year":"1996","journal-title":"IEEE Trans. Geosci. Remot. Sen"},{"key":"ref_29","unstructured":"Quarlty, G., and Guymer, T. (, January March). Hurricane Juan, A triple view from Envisat. Hobart."},{"key":"ref_30","unstructured":"Labroue, S. RA2 ocean and MWR measurement long term monitoring report for WP3, Task 2 SSB estimation for RA2 altimeter, Technical Note CLS-DOS-NT-05-200."},{"key":"ref_31","unstructured":"Hamming, R.W. (1977). Digital Filters (Prentice-Hall Signal Processing Series), Prentice-Hall."},{"key":"ref_32","unstructured":"Simpson, R.H., and Riehl, H. (1981). The Hurricane and Its Impact, Louisiana State University Press."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"5493","DOI":"10.1029\/97JC02907","article-title":"Nature of the global large scale sea level variability in relation to atmospheric forcing: A modelling study","volume":"103","author":"Fukumori","year":"1998","journal-title":"J. Geophys. Res"},{"key":"ref_34","unstructured":"Lamouroux, J. (2006). [Erreur de pr\u00e9vision d'un mod\u00e8le oc\u00e9anique barotrope du Golfe de Gascogne en r\u00e9ponse aux incertitudes sur les for\u00e7ages atmosph\u00e9riques. caract\u00e9risation et utilisation dans un sch\u00e9ma d'assimilation de donn\u00e9es \u00e0 ordre r\u00e9duit, University Paul Sabatier]. Ph.D. Thesis,."},{"key":"ref_35","unstructured":"Mourre, B. (2004). [Etude de configuration d'une constellation de satellites altim\u00e9triques pour l'observation de la dynamique oc\u00e9anique c\u00f4ti\u00e8re, University Paul Sabatier]. Ph.D. Thesis,."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"30987","DOI":"10.1029\/2000JC000763","article-title":"High frequency barotropic response to atmospheric disturbances. sensitivity to forcing, topography and friction","volume":"106","author":"Hirose","year":"2001","journal-title":"J. Geophys. Res"},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"1044","DOI":"10.1175\/1520-0485(2003)033<1044:TROLSS>2.0.CO;2","article-title":"The region of large sea surface height variability in the southeast Pacific ocean","volume":"33","author":"Webb","year":"2003","journal-title":"J. Phys. Oceanogr"}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/9\/3\/1306\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T22:09:55Z","timestamp":1760220595000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/9\/3\/1306"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2009,2,26]]},"references-count":37,"journal-issue":{"issue":"3","published-online":{"date-parts":[[2009,3]]}},"alternative-id":["s90301306"],"URL":"https:\/\/doi.org\/10.3390\/s90301306","relation":{},"ISSN":["1424-8220"],"issn-type":[{"type":"electronic","value":"1424-8220"}],"subject":[],"published":{"date-parts":[[2009,2,26]]}}}