 RossbyLinks
Carl-Gustav
Rossby: the great one who started it all!
Global
observations of Rossby waves by Dudley Chelton & Michael
Schlax (1996)
Rossby
waves in the North Atlantic by Paulo Polito & Peter Cornillon
Two short articles from NOCS's Ocean
Zone Newsletter
Sensing
invisible waves by David Cromwell & Paolo Cipollini
Waves
within waves by Katy Hill
Satellite Links
TOPEX/POSEIDON and Jason-1
The new European satellite ENVISAT
The ERS
satellites
The ATSR
radiometer on board ERS
Ocean colour from
SeaWiFS |
At
the National Oceanography Centre, Southampton, people involved in satellite oceanography
have long been working alongside modellers and theoreticians to unveil
the secrets of Rossby
waves and other propagating systems (such as eddies and Kelvin waves) in the ocean. This page summarises our results in terms of remote sensing
of these phenomena. There is also a list
of references at the bottom.
If you are not familiar with
Rossby waves, you may want to have a look at the introduction
first......
To begin with, we have studied
Rossby waves in altimeter data (starting from Geosat, then TOPEX/POSEIDON
and the altimeters on board the ERS satellites - now following on with Jason-1 and ENVISAT). The initial approach (and
still a pretty good one) was to look for the waves in longitude/time plots
of Sea Surface Height Anomalies, and possibly analyse them by Fourier Analysis.
Then we started using the Radon Transform (a quite popular transform in
the field of seismology). At this stage we extended
the Radon Transform to the 3-D domain and implemented it into MATLAB
in order to study the directional properties of the waves (i.e. any possible
deviation from a pure westward propagation). This is the subject of
a paper published in JAOT.
The investigations have been extended to the global Sea Surface Temperature
field from the ATSR radiometer on board ERS
(see the relevant paper by Hill et al. appeared
in JGR-Oceans).
We also detect clearly
the signature of Rossby waves in the chlorophyll-a field from ocean colour sensors.
See the original paper
by Cipollini et al published in GRL, and a
new study on the possible physical/biological mechanisms
in collaboration with Mete Uz of the University of Maryland. This research is now being carried forward within our collaboration with Guillume Charria, Isabelle Dadou and other colleagues at LEGOS, Toulouse.
Recently, we started trying
a different approach to look for Rossby waves in satellite data - that
is, looking for solitary waves. - see reference.
A slide
show reviews past and recent techniques, and how they have been implemented
with MATLAB.
The RossbyPlayers @ NOCS
Many NOCS staff & students have contributed
to observations of Rossby waves and other propagating systems from satellite data at NOCS during the last
few years - some of them have now moved to pastures new, while others are
still around. In strict alphabetical order (and with links for those who are still at NOCS!): Peter
Challenor, Paolo
Cipollini, David
Cromwell, Katy
Hill (now at CSIRO Hobart), Joël Hirschi, Richenda Houseago-Stokes, Matt Jones, Stefania Marsili, Doug McNeall (now at MetOffice),
Graham
Quartly, Ian
Robinson, Robin Tokmakian (now at Naval Postgraduate School).
We also have had help from visiting scientists (Guillaume Charria, Angela Maharaj,
Thierry Penduff, Mete Uz), past students
(Stefano Colombo, Albanne Lecointre, Stefano Raffaglio, Laura Edwards, Emma Lazzeri) and present students (Rob O'Brien, Anna Sutcliffe).
And, last but not least, we gratefully acknowledge the support and guidance of our modellers and theoreticians in the Ocean Modelling and Forecasting Research Group (with many thanks to Jeff Blundell, and a special thought to the memory of the late Prof. Peter Killworth who was a truly inspiration for this research over many years)
References
- refereed papers
(For reprints, see also e-prints Soton )
Hirschi J. J.-M., P.D. Killworth, J.R. Blundell: Sea surface height signals as indicators for oceanic meridional mass transports. Journal of Physical Oceanography [accepted]
G. Charria, I. Dadou, P. Cipollini, M. Drévillon, and V. Garçon, Influence of Rossby waves on primary production from a coupled physical-biogeochemical model in the North Atlantic Ocean, Ocean Science, 4, 199-213, 2008.
A. Lecointre, T. Penduff, P. Cipollini, R. Tailleux, and B. Barnier, Depth dependence of westward-propagating North Atlantic features diagnosed from altimetry and a numerical 1/6-degree model, Ocean Science, 4, 99-113, 2008
Angela M. Maharaj, Paolo Cipollini, Neil J. Holbrook, Peter D. Killworth, Jeffrey R. Blundell, An evaluation of the classical and extended Rossby wave theories in explaining spectral estimates of the first few baroclinic modes in the South Pacific Ocean, Ocean Dynamics, v. 57, no. 3, pp 173-187, 2007.
Laura A. Edwards, Richenda E. Houseago-Stokes and Paolo Cipollini, Altimeter observations of the MJO/ENSO connection through Kelvin waves, International Journal of Remote Sensing, Vol. 27, no. 06, 20 March 2006, pp. 1193-1203, 2006.
G. Charria, I. Dadou, P. Cipollini, M. Drévillon, P. De Mey, and V. Garçon,
Understanding the influence of Rossby waves on surface chlorophyll concentrations in the North Atlantic Ocean,
J. Mar. Research, vol. 64, pp. 43-71, 2006
P. Cipollini, P. G. Challenor, S.Colombo,
"A method for tracking individual planetary waves in remotely sensed data",
IEEE Transactions on Geoscience and Remote Sensing, vol. 44, no. 1, pp. 159-166. doi: 10.1109/TGRS.2005.859355, 2006
P. Cipollini, G. D. Quartly,
P. G. Challenor, D. Cromwell and I. S. Robinson, "Remote sensing of extra-equatorial
planetary waves in the oceans" in Manual of Remote Sensing vol. 6 - Remote Sensing of the Marine Environment, chapter 3, pp. 61-84, ASPRS.
(PDF
file, 2.2MB - this is an excellent summary of our work in the field)
A. M. Maharaj, P. Cipollini, N. J. Holbrook,
"Observed variability of the South Pacific westward sea level anomaly signal in the presence of bottom topography",
Geophys. Res. Letters, 32, L04611, doi:10.1029/2004GL020966, 2005.
P. D. Killworth, P. Cipollini, B. M. Uz, J. R. Blundell,
"Physical and biological mechanisms for planetary waves observed in sea-surface chlorophyll",
J. Geophys. Res., 109, C07002, doi:10.1029/2003JC001768, 2004.(PDF file - 2.5MB))
P. G. Challenor, P. Cipollini, D. Cromwell, K. L. Hill, G. D. Quartly, I. S. Robinson,
"Global characteristics of Rossby wave propagation from multiple satellite datasets",
International Journal of Remote Sensing , vol. 25, no. 7-8, pp. 1297-1302, 2004.
(PDF
file - 2019k)
G. D. Quartly, P. Cipollini, D. Cromwell, P. G. Challenor,
"Rossby waves: synergy in action", Phil. Trans. R. Soc. London A,
10.1098/rsta.2002.1108, 2003.
(PDF file - 235k)
T. H. Guymer, P. G. Challenor, P. Cipollini,
D. Cromwell, G. D. Quartly, M. A. Srokosz, P. D. Cotton, "Multi-sensor satellite monitoring
of ocean climate", Operational Oceanography, Implementation at the European
and Regional Scales, Proceedings of the second international Conference on EuroGOOS,
11-13 March 1999, Rome, Italy, edited by N. C. Flemming et al., pp. 405-419,
Elsevier Science Ltd, 2002. (Elsevier Oceanography Series, 66).
(PDF file - 2358k)
D. Cromwell,
"Sea surface observations of the 34N 'waveguide' in the North Atlantic",
Geophysical Research Letters,
Vol. 28 , No. 19, pp. 3705-3708, 2001.
(PDF
file - 639k)
P. G.
Challenor, P. Cipollini, D. Cromwell, "Use of the 3-D Radon Transform to
examine the properties of oceanic Rossby waves", Journal of Atmospheric
and Oceanic Technology, vol. 18, no. 9, pp. 1558-1566, 2001.
(PDF file - 1256k).
See also: "Corrigendum",
JAOT, vol. 19, no. 5, p. 828, 2002.
(we have also a related
poster, PDF file - 751k)
P.
Cipollini, D. Cromwell, P. G. Challenor and S Raffaglio, "Rossby waves
detected in global ocean colour data", Geophysical Research Letters,
Vol. 28 , No. 2, pp. 323-326, 2001. (PDF
file - 991k)
K.
L. Hill, I. S. Robinson, P. Cipollini, "Propagation characteristics of
extratropical planetary waves observed in the ATSR global sea surface temperature
record", Journal of Geophysical Research - Oceans,v. 105(C9), pp.
21,927-21.946, 2000.
(PDF file - 9586k)
P. Cipollini, D. Cromwell, G.
D. Quartly and P. G. Challenor, "Remote Sensing of oceanic extra-tropical
Rossby waves", Satellites,
Oceanography and Society,edited by David Halpern, ch. 6, pp. 99-123,
Elsevier Science Ltd, 2000. ISBN: 0-444-50501-6.
P. Cipollini, D. Cromwell, G.
D. Quartly, "Observations of Rossby wave propagation in the Northeast Atlantic
with TOPEX/POSEIDON altimetry", Advances in Space Research, Vol.
22, No. 11, pp. 1553-1556, 1999.
P. Cipollini, D. Cromwell, M.
S. Jones, G. D. Quartly, P. G. Challenor, "Concurrent altimeter and infrared
observations of Rossby wave propagation near 34° N in the Northeast
Atlantic,"Geophysical Research Letters, Vol. 24, No. 8 , pp. 889-892,
1997. (PDF
file - 1570k).
R. T. Tokmakian and P. G. Challenor,
"Observations in the Canary Basin and the Azores Frontal Region Using Geosat
Data", Journal of Geophysical Research-Oceans, 98(C3), 4761-4773,
1993.
References - selected conference papers
and reports
Recent papers from the Venice symposium on 15 years of progress in radar altimetry:
P. Cipollini, P. G. Challenor, D. Cromwell G. D. Quartly and I. S. Robinson,
How satellites have improved our knowledge of extratropical planetary waves in the ocean,
ESA SP-614, Proceedings of the Symposium on 15 years of progress in radar altimetry,
Venice (Italy), 13-16 March 2006
(PDF file - 1.1 MB)
P. Cipollini,
Altimetry, sea surface temperature and ocean colour unveil the effects of planetary waves on phytoplankton,
ESA SP-614, Proceedings of the Symposium on 15 years of progress in radar altimetry,
Venice (Italy), 13-16 March 2006
(PDF file - 400 KB)
some older papers:
P. Cipollini, "Multiple satellite observations
of planetary waves: techniques and results", in E. Dalle Mese (Ed.), Proceedings of 2003 Tyrrhenian International Workshop on Remote Sensing, Elba Island (Italy), 14-18 September 2003, pp 134-143, Edizioni Plus, Univ. of Pisa, Italy, 2003. ISBN 88-8492-291-7
(PDF file - 1.7 MB)
P. Cipollini, P. G. Challenor,
D. Cromwell, K. L. Hill, G. D. Quartly, I. S. Robinson, "Recent advances
in remote sensing of extra-tropical Rossby waves", Proceedings of PORSEC
2000, Goa (India), 5-8 December 2000, Vol. I, pp. 271-275, 2000.
P. Cipollini, P. G. Challenor,
D. Cromwell, G. D. Quartly, S. Raffaglio, "Observation of Rossby waves
in satellite derived chlorophyll-a data", Proceedings of PORSEC 2000, Goa
(India), 5-8 December 2000, Vol. II, pp. 530-533, 2000.
G. D. Quartly, P. Cipollini,
D. Cromwell, P. G. Challenor, "Synergistic observations of Rossby waves",
Proceedings of the ERS-ENVISAT Symposium, Gothenburg (Sweden), 16-20 October
2000, CD-ROM. (PDF
file, 1270k)
K. L. Hill, I. S. Robinson,
P. Cipollini, "The signature of Rossby waves in the ATSR dataset", Proceedings
of the ERS-ENVISAT Symposium, Gothenburg (Sweden), 16-20 October 2000,
CD-ROM. (PDF
file, 743k)
P. Cipollini, P. G. Challenor,
D. Cromwell, G. D. Quartly and S. Raffaglio, "Detection of Rossby waves
in ocean colour data", Proceedings of IEEE International Geoscience
and Remote Sensing Symposium (IGARSS 2000), Honolulu, Hawaii (USA),
24-28 July 2000, in press. Piscataway, NJ: IEEE. (download
the PDF file - 206k)
P. Cipollini, P. G. Challenor,
D. Cromwell, K, L, Hill, G. D. Quartly and I. S. Robinson, "Remote sensing
of oceanic Rossby waves: new techniques and results", Proceedings of
IEEE International Geoscience and Remote Sensing Symposium (IGARSS 2000),
Honolulu, Hawaii (USA), 24-28 July 2000, in press. Piscataway, NJ: IEEE.
(download
the PDF file - 469k)
D.
Cromwell and J Blundell, "Rossby waves in models", Southampton Oceanography
Centre Internal Document, No. 54, 74 pp., March 2000 (see
it in HTML)
G. D. Quartly, P. Cipollini,
D. Cromwell, P. G. Challenor, S. Raffaglio, "Detecting Rossby waves across
the whole spectrum", Proceedings of RSS'99 - Earth Observation:from
data to information - Cardiff, 8-10 September 1999, pp. 255-261. ISBN:
0 946226 27 X.
K. L. Hill, I. S. Robinson,
P. Cipollini, "Extratropical planetary wave propagation characteristics
from the ATSR global Sea Surface Temperature record", Proceedings of
the International Workshop on the Applications of the ERS Along Track Scanning
Radiometer, Frascati (Italy) 23-25 June 1999.
P.
Cipollini, P. G. Challenor, D. Cromwell, T. H. Guymer, S. Raffaglio, "The
detectability of Rossby waves in ocean colour data", Southampton Oceanography
Centre Internal Document, No. 44, 29 pp., 1999 (see
it in HTML)
P. G. Challenor, P. Cipollini,
D. Cromwell, "Using the Radon transform to examine the properties of Rossby
waves", Proceedings of Symposium on Studies of Ocean and Solid Earth
Dynamics Using Satellite Altimetry Data, Fukuoka (Japan), 12-13 November
1998, pp. 1-7, Univ, of Kyushu, 1999.
P. Cipollini, D. Cromwell, M.
S. Jones, G. D. Quartly and P. G. Challenor, "Satellite investigations
of Rossby waves: a study of directional properties and topographic effects",
Proceedings
of the International Symposium ëMonitoring the Oceans in the 2000s:
an integrated approach, Biarritz (France), 15-17 October 1997, CNES,
Toulouse (France), 1997.
P. Cipollini, D. Cromwell, M.
S. Jones, G. D. Quartly and P. G. Challenor, "The potential of ERS for
the detection of Rossby waves in the Northeast Atlantic", ESA SP-414Proc.
of 3rd ERS Symposium - Space at the Service of our Environment,
Florence
(Italy), 17-21 March 1997, Vol. 3, pp. 1473-1478, European Space Agency,
1997. ISBN: 92-9092-656-2 Noordwijk (The Netherlands): ESA/ESTEC.
P. Cipollini, D. Cromwell, G.
D. Quartly, "Variability of Rossby wave propagation in the North Atlantic
from TOPEX/POSEIDON altimetry," Proceedings of IEEE International Geoscience
and Remote Sensing Symposium (IGARSS '96), Lincoln (Nebraska),
27-31 May 1996, vol. I, pp. 91-93, 1996. Piscataway, NJ: IEEE.
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