New paper finds Southern Oceans are losing heat

A paper published today in Geophysical Research Letters finds from observations that the Southern Oceans show an annual net heat loss of -10 Wm-2. The paper is the first to study annual heat flux between the atmosphere and the Southern Oceans, a "key component of the global climate system: insulating the Antarctic polar region from the subtropics, transferring climate signals throughout the world's oceans and forming the southern component of the global overturning circulation." The finding contradicts warmist claims that the oceans are gaining 'missing heat' due to an increase in greenhouse gases.

GEOPHYSICAL RESEARCH LETTERS, VOL. 39, L16606, 8 PP., 2012
doi:10.1029/2012GL052290

First air-sea flux mooring measurements in the Southern Ocean

Key Points

• Southern Ocean air-sea fluxes are under-observed, leading to large uncertainty
• The first year-long air-sea flux observations quantify an annual cycle
• Shows seasonal cycle, small annual net ocean heat loss and extreme events

E. W. Schulz

Centre for Australian Weather and Climate Research, Australian Bureau of Meteorology, Melbourne, Victoria, Australia

S. A. Josey

National Oceanography Centre, Southampton, Southampton, UK

R. Verein

Centre for Australian Weather and Climate Research, Australian Bureau of Meteorology, Melbourne, Victoria, Australia

The Southern Ocean is a key component of the global climate system: insulating the Antarctic polar region from the subtropics, transferring climate signals throughout the world's oceans and forming the southern component of the global overturning circulation. However, the air-sea fluxes that drive these processes are severely under-observed due to the harsh and remote location. This paucity of reference observations has resulted in large uncertainties in ship-based, numerical weather prediction, satellite and derived flux products. Here, we report observations from the Southern Ocean Flux Station (SOFS); the first successful air-sea flux mooring deployment in this ocean. The mooring was deployed at 47°S, 142°E for March 2010 to March 2011 and returned measurements of near surface meteorological variables and radiative components of the heat exchange. These observations enable the first accurate quantification of the annual cycle of net air-sea heat exchange and wind stress from a Southern Ocean location. They reveal a high degree of variability in the net heat flux with extreme turbulent heat loss events, reaching −470 Wm⁻² in the daily mean, associated with cold air flowing from higher southern latitudes. The observed annual mean net air-sea heat flux is a small net ocean heat loss of −10 Wm⁻², with seasonal extrema of 139 Wm⁻² in January and −79 Wm⁻² in July. The novel observations made with the SOFS mooring provide a key point of reference for addressing the high level of uncertainty that currently exists in Southern Ocean air-sea flux datasets.