Diurnal warm-layer events in the western Mediterranean and European shelf seas

Details Diurnal warm-layer events in the western Mediterranean and European shelf seas Diurnal warm-layer events in the western Mediterranean and European shelf seas

Feb 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008georl..3504601m&link_type=abstract

Geophysical Research Letters, Volume 35, Issue 4, CiteID L04601

Physics

10

Oceanography: General: Diurnal, Seasonal, And Annual Cycles (0438), Oceanography: General: Descriptive And Regional Oceanography, Oceanography: Physical: Air/Sea Interactions (0312, 3339), Oceanography: General: Remote Sensing And Electromagnetic Processes (0689, 2487, 3285, 4455, 6934), Oceanography: Physical: Upper Ocean And Mixed Layer Processes

Scientific paper

We characterize near-surface ocean diurnal warm-layer events, using satellite observations and fields from numerical weather forecasting. The study covers April to September, 2006, over the area 11°W to 17°E and 35°N to 57°N, with 0.1° cells. We use hourly satellite SSTs from which peak amplitudes of diurnal cycles in SST (dSSTs) can be estimated with error ~0.3 K. The diurnal excursions of SST observed are spatially and temporally coherent. The largest dSSTs exceed 6 K, affect 0.01% of the surface, and are seen in the Mediterranean, North and Irish Seas. There is an anti-correlation between the magnitude and the horizontal length scale of dSST events. Events wherein dSST exceeds 4 K have length scales of <=40 km. From the frequency distribution of different measures of wind-speed minima, we infer that extreme dSST maxima arise where conditions of low wind speed are sustained from early morning to mid afternoon.

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