"his [dr spencer's] latest research demonstrates that – in the short term, at any rate –  the temperature feedbacks that the ipcc imagines will greatly amplify  any initial warming caused by co2 are net-negative, attenuating the  warming they are supposed to enhance.
"his [dr spencer's] latest research demonstrates that – in the short term, at any rate –  the temperature feedbacks that the ipcc imagines will greatly amplify  any initial warming caused by co2 are net-negative, attenuating the  warming they are supposed to enhance.
greenhouse gas:181
because water vapor is a greenhouse gas, this results in further warming and so is a "positive feedback" that amplifies the original warming.