The diurnal cycle of sea-surface temperature and estimation of the heat budget of the Mediterranean Sea

S. Marullo, Peter J Minnett, R. Santoleri, M. Tonani

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The diurnal cycle in sea-surface temperature (SST) is reconstructed for the year 2013 by combining numerical model analyses and satellite measurements using Optimal Interpolation (OI). The method is applied to derive hourly Mediterranean SST fields using Spinning Enhanced Visible and Infrared Imager (SEVIRI) data and Mediterranean Forecasting System analyses (Copernicus Marine Environment Monitoring Service - Analysis and Forecast product). The evaluation of the Diurnal OI SST (DOISST) values against drifter measurements results in a mean bias of −0.1°C and a RMS of 0.4°C. The DOISST fields reproduce well the diurnal cycle in SST including extreme Diurnal Warming events as measured by drifting buoys. We evaluate the impact of resolving the SST diurnal cycle, including extreme events, on estimates of the heat budget of the Mediterranean Sea over an entire annual cycle. It results in the mean annual difference in the heat loss derived using SSTs with and without diurnal variations of 4 Wm−2 with a peak of 9 Wm−2 in July. This value is comparable to several other sources of uncertainty in the calculation of the heat and water budgets of the Mediterranean Sea. The results are an important step toward reducing uncertainties in the “Mediterranean Sea Heat Budget Closure Problem”.

Original languageEnglish (US)
Pages (from-to)8351-8367
Number of pages17
JournalJournal of Geophysical Research: Oceans
Volume121
Issue number11
DOIs
StatePublished - Nov 1 2016

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heat budget
Mediterranean Sea
sea surface temperature
surface temperature
heat
cycles
forecasting
interpolation
Interpolation
uncertainty
Temperature
buoys
Buoys
marine environments
environmental monitoring
diurnal variations
spinning
diurnal variation
Heat losses
Image sensors

Keywords

  • diurnal heating
  • Mediterranean Sea
  • satellite SSTs
  • surface heat and water budgets

ASJC Scopus subject areas

  • Geophysics
  • Oceanography
  • Forestry
  • Ecology
  • Aquatic Science
  • Water Science and Technology
  • Soil Science
  • Geochemistry and Petrology
  • Earth-Surface Processes
  • Atmospheric Science
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science
  • Palaeontology

Cite this

The diurnal cycle of sea-surface temperature and estimation of the heat budget of the Mediterranean Sea. / Marullo, S.; Minnett, Peter J; Santoleri, R.; Tonani, M.

In: Journal of Geophysical Research: Oceans, Vol. 121, No. 11, 01.11.2016, p. 8351-8367.

Research output: Contribution to journalArticle

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