Winds and great ocean
gyres spin up in negative phases of the polar annual modes.
Ocean
gyres spin up on the surface through winds and planetary rotation.
The gyres spin up with negative polar annular modes — high pressure at the poles push circumpolar wind and storms into lower latitudes.
When the tropical easterly trade winds strengthen, as they have from the year 2000 onwards, this whole wind - driven ocean circulation becomes more vigorous, the South Pacific subtropical
gyre spins up, and the western arm of the gyre exports more tropical water through the Indonesian archipelago into the Indian Ocean.
As the North Atlantic subtropical
gyre spun - up in response to the trade wind - forcing, the gulfstream, the powerful ribbon - like western boundary current travelling north along the North American coast at the edge of the gyre, intensified.
The North Pacific subtropical
gyre spun up intensely in the middle of the 2013 year, and the South Pacific subtropical gyre intensified leading up to the end of 2013.
Not exact matches
But as a lesson in how to
spin,
gyre and gimble The Brillig Blogger is indeed a nonpareil and could have a great future in political speech - writing if the «supporting» authors in self - publishing venture follows literary agent - gatekeeping for traditional publishers down the rabbit hole.
This is to be expected because the
spin - up of the wind - driven ocean circulation speeds up the currents (Ekman transport) which carry heat out of the tropics in the near - surface layers toward the subtropical ocean
gyres.
Ekman transport may be confined to the surface layers, but when the circulation
spins up, the greater rotational speed of the
gyre increases the rigidity of the Taylor column at its centre.
Increased winds in the tropics and mid latitudes can «
spin up» the mid-ocean
gyres, increasing the rate at which water gets pumped down to mid depths through Ekman pumping, taking heat from the surface with it.
However the negative NAO also implies a
spin - down of the subtropical
gyre and therefore a drop in the pole - ward transport of warm tropical waters.
In both hemisheres cold polar winds and storms pushing into lower latitudes are
spinning up the oceanic
gyres and increasing deep ocean upwelling in the eastern and central Pacific in the self reinforcing pattern of the Interdecadal Pacific Oscillation.
The South Atlantic subtropical
gyre seems still to be in a
spun - up state.
A near - coherent
spin - up of all five subtropical ocean
gyres was observed from the early / mid 1990's through to about 2004, when a peak was reached.
Stronger easterly trade and midlatitude westerly winds
spin up the subtropical ocean
gyres.
Some of the warm water would be subducted by Atlantic Meridional Overturning Circulation / Thermohaline Circulation, some would be carried by ocean currents into the Arctic Ocean where it would melt sea ice, and the remainder would be
spun southward by the North Atlantic
gyre toward the tropics so it could be warmed more by the effects of the slower - than - normal trade winds.
What fits is UV modulation of SAM and
spin up of the lower latitude
gyres.
But see my post above about the
spinning up if the
gyres, as it is a another way that warm water is brought to depth in the Pacific and it fluctuates with ENSO and PDO frequencies.
Stronger easterlies in the Pacific
spin up the
gyres in both hemispheres and Ekman pumping in those regions intensifies, bringing warmer surface waters to depth.
What fits is top down solar modulation of the SAM
spinning up the lower latitude
gyres.
These changes in low solar activity push polar storms into lower latitudes and
spin up ocean
gyres.
Winds and storms pushing into lower latitudes
spin up the
gyres pushing cold polar water into the Californian and Peruvian currents facilitating deep ocean upwelling.
The cool phase starts with upwelling which starts with flows in the Peruvian and Californian Currents
spinning up with the Pacific
gyres.
More salt is La Niña as wind and currents
spin up
gyres and upwelling increases...
Low solar activity
spins up the great ocean
gyres producing more frequent La Niña and a cooler northeastern Pacific (more upwelling)-- and vice versa.
ENSO (El Niño Southern Oscillation) variability is linked to the
spinning up or down of the South Pacific
gyre — as it brings more or less cold Southern Ocean water northward — along the Peruvian coast — to more or less... Continue reading →
Low solar activity
spins up the north and south Pacific
gyres on decadal and much longer timescales.
ENSO (El Niño Southern Oscillation) variability is linked to the
spinning up or down of the South Pacific
gyre — as it brings more or less cold Southern Ocean water northward — along the Peruvian coast — to more or less displace warm surface water and initiate upwelling.
A negative SAM
spins up the South Pacific
gyre transporting cold Southern Ocean water north and facilitating upwelling on the Peruvian coast.
During times when the Beaufort
gyre dominates, ice
spins in place and accumulates.
This
spins up sub-polar
gyres pushing cold water into the Californian and Peruvian Currents — diluting warm surface water and biasing the system to more upwelling.
UV modulation of the polar annular modes — in the Hale cycle —
spinning up sub-polar
gyres has been suggested.
Counter currents and
gyres created by bottom features such as the Pourtalès Terrace in the Florida Current and the Charleston Bump in the Gulf Stream help retain the pelagic larvae within the area of the Florida Keys and SAB, respectively, by causing persistent
gyres and eddies that
spin off the current and retain their pelagic flora and fauna, some of which recruit to benthic and pelagic habitats in the region.
Growing where the currents of the ocean meet in a
spinning swirl, the Pacific
Gyre Garbage Patch is a soup of trash that has floated from all corners of the globe.