We have identified ionized outflows in the narrow line region of all but one SDSS type 2 quasars ( QSO2 ) at z \la 0.1 ( 20/21 , detection rate 95 % ) , implying that this is a ubiquitous phenomenon in this object class also at the lowest z .
The outflowing gas has high densities ( n _ { e } \ga 1000 cm ^ { -3 } ) and covers a region the size of a few kpc .
This implies ionized outflow masses M _ { outf } \sim ( 0.3-2.4 ) \times 10 ^ { 6 } M _ { \odot } Â and mass outflow rates \dot { M } < few M _ { \odot } Â yr ^ { -1 } .

The triggering mechanism of the outflows is related to the nuclear activity .
The QSO2 can be classified in two groups according to the behavior and properties of the outflowing gas .
QSO2 in Group 1 ( 5/20 objects ) show the most extreme turbulence , they have on average higher radio luminosities and higher excess of radio emission .
QSO2 in Group 2 ( 15/20 objects ) show less extreme turbulence , they have lower radio luminosities and , on average , lower or no radio excess .

We propose that two competing outflow mechanisms are at work : radio jets and accretion disk winds .
Radio jet induced outflows are dominant in Group 1 , while disk winds dominate in Group 2 .
We find that the radio jet mode is capable of producing more extreme outflows .

To test this interpretation we predict that : 1 ) high resolution VLBA imaging will reveal the presence of jets in Group 1 QSO2 ; 2 ) the morphology of their extended ionized nebulae must be more highly collimated and kinematically perturbed .