Laserfiche WebLink
Cooperative Institute for Research in Environmental Sciences <br />UNIVERSITY OF COLORADO BOULDER and NOAA <br />E0 =f T,Rd,q,U2(), so <br />DE0 =¶E0 <br />¶T DT +¶E0 <br />¶Rd <br />DRd +¶E0 <br />¶q Dq +¶E0 <br />¶U2 <br />DU2 <br />derived <br />analytically <br />[Hobbins, 2016] <br />anomalies <br />observed in <br />reanalyses <br />Decomposition and attribution <br />Attribution of drought dynamics m/sec W/m2 kg/kg oC mm Changes in 12-week E0 (mm) E0 in Sacramento River <br />basin: Feb-Jul, 2014 <br /> <br />T = air temperature <br />q = specific humidity <br />Rd = downwelling SW <br />U2 = wind speed <br />ΔE0 <br /> <br /> <br />ΔT <br /> <br />Δq <br /> <br /> <br />ΔRd <br /> <br /> <br />ΔU2 <br />[Hobbins et al., JHM 2016] <br />Drought intensification <br />(increasing E0) forced by <br />•first, below-normal q <br />(while T falling) <br />•then, increasing T and, <br />to a lesser degree, Rd <br />•U2 plays little role <br />We can know which drivers <br />are most affecting changes in <br />E0 – and therefore in drought.