Sea Surface Temperature from satellite radiometers (3)

Pierre Le Borgne

Météo-France/DP/CMS, Lannion

14 December 2012 UBO Master course

Plan

Introduction Products SST retrieval methods Validation Saharan Dust

Applications– Diurnal warming– Ocean dynamics– Other…

Conclusion

(1)

(2)

(3)

Diurnal Warming

-Geostationary -Polar orbiters

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Buoy: 61854; lat 38.27; lon 6.30

Péré et al, Sept. 2011

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62100 lat 42.10 lon 4.7

Péré et al, Sept. 2011

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2011/08/03Drifter: 61787

SEVIRI and drifting buoy DW (all amplitudes > 0.5K)

Summer 2011All daily cycles with SEVIRI or drifting buoy

Daily DWmax> 0.5K

3 Hours

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DW mysteries

LeBorgne et al, 2012

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Bellenger et al, Nov. 2011

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Zone definition

B

C

D

A

E

F

G

H

I

N. Atl

N Subtrop.

Intertrop.

S. Subtrop.

S. Atl.

N. Indian

Mozambique

S. Indian

Med.

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DW amplitudes per zone (Atl.)

Med.N. Atl

N. Subtrop. Atl.

Intertrop. Atl.

S. Subtrop. Atl.

S. Atl.

N/S symmetry Anomaly?

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DW amplitudes per zone (Indian)

S. Indian

N. Indian

Moz.

Intertropical anomaly?Not in the Moz. area

Similar to subtropicalAtlantic

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DW modelisation

D. Ciani, 2012

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DW modelisation

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Polar orbiter DW

VALIDATION??

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METOP AVHRR SST + ASCAT WIND 20080702-1210

Structure analysis

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ARCTIC: JULY 2008Siberia

Beaufort

Hudson

Baffin

South BarentsBaltic

Kara

Monthly cumulated DW

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ANTARCTIC: JANUARY 2010

Biscoe

Ross

McKenzie

Indian

Atlantic

Pacific

Monthly cumulated DW

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Typical cycle in the Mediterranean Sea (August 2010)

Metop LST

En cours:- morning time lag?- DW Geographical distribution

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Diurnal warming: references

Filipiak, M.J., C. J. Merchant, H. Kettle and P. Le Borgne (2010). A statistical model for sea surface diurnal warming driven by numerical weather prediction fluxes and winds Ocean Sci. Discuss., 7, 1497–1532, 2010 www.ocean-sci-discuss.net/7/1497/2010/doi:10.5194/osd-7-1497-2010

Gentemann, C. L., P. J. Minnett, P. Le Borgne, and C. J. Merchant (2008), Multi-satellite measurements of large diurnal warming events, Geophys. Res. Lett., 35, L22602, doi:10.1029/2008GL035730.

Merchant, C. J., M. J. Filipiak, P. Le Borgne, H. Roquet, E. Autret, J.-F. Piolle, and S. Lavender (2008), Diurnal warm-layer events in the western Mediterranean and European shelf seas, Geophys. Res. Lett., 35, L04601, doi:10.1029/2007GL033071.

Pierre Le Borgne, Gérard Legendre, Sonia Péré (2012), Comparison of MSG/SEVIRI and drifting buoy derived diurnal warming estimates, Remote Sensing of Environment, Volume 124, September 2012, Pages 622-626

Steinar Eastwood, Pierre Le Borgne, Sonia Péré, David Poulter, Diurnal variability in sea surface temperature in the Arctic Remote Sensing of Environment, 115, 10, 2594-2602