Parameterizations of the ocean skin effect and implications for satellite-based measurement of sea-surface temperature

[1] Satellite-based retrievals of sea-surface temperature (SST) hold great potential for augmenting and improving existing global climate analyses. However, optimal blending of satellite data with in situ measurements of SST requires an accurate estimate of the temperature difference between radiometric skin and bulk water sampled below the skin. Contemporaneous shipborne radiometer measurements and in situ measurements of SST were obtained during a cruise in the western Pacific and used to define the nighttime skin-bulk temperature difference. A strong trend of increasing temperature difference with decreasing wind speed was observed. Three published parameterizations of the skin effect have been tested against the ship observations, with excellent agreement achieved by one of these. Good results were also obtained when this scheme was forced by heat fluxes from the Met Office numerical weather prediction global analysis collocated with the observations in space and time. The implementation of a skin effect model in a global satellite data processing system was tested using collocated observations of SST from buoys (bulk) and along-track scanning radiometer 2 (skin) during 1995–1997. This is a vital step toward integrating accurate satellite retrievals of SST with traditional in situ data sources for climate variability studies.

[1]  Peter Schlüssel,et al.  Parameterization of the Cool Skin of the Ocean and of the Air-Ocean Gas Transfer on the Basis of Modeling Surface Renewal , 1994 .

[2]  Dj Lee,et al.  The Along=Track Scanning Radiometer - measurement of sea surface temperature from ERS-1 , 1990 .

[3]  I. J. Barton,et al.  Validation of the ATSR in Australian Waters , 1995 .

[4]  David Parker,et al.  Marine Surface Temperature: Observed Variations and Data Requirements , 1995 .

[5]  A. M. Zavody,et al.  A radiative transfer model for sea surface temperature retrieval for the along‐track scanning radiometer , 1995 .

[6]  Peter J. Webster,et al.  Clouds, Radiation, and the Diurnal Cycle of Sea Surface Temperature in the Tropical Western Pacific , 1996 .

[7]  William G. Pichel,et al.  Comparative performance of AVHRR‐based multichannel sea surface temperatures , 1985 .

[8]  Stuart D. Smith.  Coefficients for sea surface wind stress, heat flux, and wind profiles as a function of wind speed and temperature , 1988 .

[9]  L. Hasse.  On the cooling of the sea surface by evaporation and heat exchange , 1963 .

[10]  Myles R. Allen,et al.  Actual and potential information in dual‐view radiometric observations of sea surface temperature from ATSR , 1998 .

[11]  Christopher J. Merchant,et al.  Toward the elimination of bias in satellite retrievals of sea surface temperature: 2. Comparison with in situ measurements , 1999 .

[12]  J. Turner,et al.  A one‐dimensional model of the seasonal thermocline II. The general theory and its consequences , 1967 .

[13]  Christopher J. Merchant,et al.  Toward the elimination of bias in satellite retrievals of sea surface temperature: 1. Theory, modeling and interalgorithm comparison , 1999 .

[14]  M. J. P. Cullen,et al.  The unified forecast/climate model , 1993 .

[15]  L. Kantha,et al.  An improved mixed layer model for geophysical applications , 1994 .

[16]  W. Liu,et al.  Bulk Parameterization of Air-Sea Exchanges of Heat and Water Vapor Including the Molecular Constraints at the Interface , 1979 .

[17]  Elizabeth C. Kent,et al.  A comparison of oceanic skin effect parameterizations using shipborne radiometer data , 1996 .

[18]  R. Smith,et al.  SUBSURFACE, SURFACE AND BOUNDARY LAYER PROCESSES , 1996 .

[19]  L. Hasse.  The sea surface temperature deviation and the heat flow at the sea-air interface , 1971 .

[20]  William J. Emery,et al.  The Behavior of the Bulk – Skin Sea Surface Temperature Difference under Varying Wind Speed and Heat Flux , 1996 .

[21]  Robert Pinkel,et al.  Diurnal cycling: observations and models of the upper-ocean response to diurnal heating, cooling, and wind mixing. Technical report , 1986 .

[22]  Ian S. Robinson,et al.  Review Article. The sea surface thermal boundary layer and its relevance to the measurement of sea surface temperature by airborne and spaceborne radiometers , 1984 .

[23]  C J Donlon,et al.  Effect of atmospheric radiance errors in radiometric sea-surface skin temperature measurements. , 2000, Applied optics.

[24]  Ian S. Robinson,et al.  The Calibration and Intercalibration of Sea-Going Infrared Radiometer Systems Using a Low Cost Blackbody Cavity , 1999 .

[25]  Peter J. Minnett,et al.  An Independent Assessment of Pathfinder AVHRR Sea Surface Temperature Accuracy Using the Marine Atmosphere Emitted Radiance Interferometer (MAERI) , 2000 .

[26]  E. F. Bradley,et al.  Cool‐skin and warm‐layer effects on sea surface temperature , 1996 .

[27]  W. Timothy Liu,et al.  Temperature profile in the molecular sublayer near the interface of a fluid in turbulent motion , 1975 .

[28]  John Sapper,et al.  The development and operational application of nonlinear algorithms for the measurement of sea surface temperatures with the NOAA polar‐orbiting environmental satellites , 1998 .

[29]  P. North,et al.  New data sets for climate change and land use studies are on track , 1999 .

[30]  P. Minnett,et al.  The Marine-Atmospheric Emitted Radiance Interferometer: A High-Accuracy, Seagoing Infrared Spectroradiometer , 2001 .

[31]  Peter J. Minnett,et al.  Satellite multichannel infrared measurements of sea surface temperature of the N.E. Atlantic Ocean using AVHRR/2 , 1984 .

[32]  P. M. Saunders,et al.  The Temperature at the Ocean-Air Interface , 1967 .

[33]  Christopher J. Merchant,et al.  Direct observations of skin‐bulk SST variability , 2000 .

[34]  William J. Emery,et al.  On the bulk‐skin temperature difference and its impact on satellite remote sensing of sea surface temperature , 1990 .

[35]  Thomas M. Smith,et al.  Improved Global Sea Surface Temperature Analyses Using Optimum Interpolation , 1994 .

[36]  Craig Donlon,et al.  Observations of the oceanic thermal skin in the Atlantic Ocean , 1997 .

[37]  C. Donlon,et al.  Toward Improved Validation of Satellite Sea Surface Skin Temperature Measurements for Climate Research , 2002 .

[38]  J. R. Christy,et al.  Global change detection , 1994, Nature.