at: Nature Geoscience
“Imprint of Southern Ocean eddies on winds, clouds and rainfall”
to the turbulent nature of the ocean, mesoscale eddies are
omnipresent. The impact of these transitory and
approximately circular sea surface temperature fronts on
the overlying atmosphere is not well known. Stationary
fronts such as the Gulf Stream have been reported to lead
to pronounced atmospheric changes1,
However, the impact of transient ocean eddies on the
atmosphere has not been determined systematically, except
on winds and to some extent clouds3,
Here, we examine the atmospheric conditions associated
with over 600,000 individual eddies in the Southern Ocean,
using satellite data. We show that ocean eddies locally
affect near-surface wind, cloud properties and rainfall.
The observed pattern of atmospheric change is consistent
with a mechanism in which sea surface temperature
anomalies associated with the oceanic eddies modify
turbulence in the
atmospheric boundary layer. In the case of
cyclonic eddies, this modification triggers a slackening
of near-surface winds, a decline in cloud fraction and
water content, and a reduction in rainfall. We conclude
that transient mesoscale ocean structures can
significantly affect much larger atmospheric low-pressure
systems that swiftly pass by at the latitudes investigated.
to Abstract & Footnotes at:
Competent science should know it since long:
Since long we support the slogan: “Climate is the continuation of
the oceans by other means”. Call it a definition, or an
explanation, or practical observation, or plain physical
consideration, the oceans and seas drive and control the
physics of the atmosphere.
the climate definition more here:
The oceasn control the atmosphere by water and heat supply.
By far the most sun ray influence the global air
temperature via the oceans. By far the most water vapor in
the atmosphere is supplied by the oceans in a rhythm of
less than two weeks. Each water drop is in the air merely
for about 10 days.
the following overview:
Only the sea surface over some dozen metres is “warm”. Average
temperatures of the global water body are merely about +4°C.
Every change in the sea surface structure may have a
noticable impact on
the atmospheric boundary layer.