vl.markPoint({filled: true})
.data(abTemp)
.encode(
vl.y().fieldQ('Temperature_Anomaly'),
vl.x().fieldT('Year'),
vl.opacity().value(.5),
vl.color().fieldQ('Temperature_Anomaly').scale({
"domain":[-1,0,.05,1.8],
"range":["#0000ff", "#88ccff", "#f98d5d", "#ff0000"]
}),
vl.tooltip().fieldO('Month')
)
.width(600)
.render()