There is little evidence for a human influence
on precipitation deficits, but a lot of evidence for a human fingerprint on surface soil moisture deficits — starting with increased evapotranspiration caused by higher temperatures.
Not exact matches
Given the known influence of temperature
on drought, the fact that the 2012 — 2014 record drought severity has co-occurred with record statewide warmth (7) raises the question of whether long - term warming has altered the probability that
precipitation deficits yield extreme drought in California.
Given that the ongoing California drought encompasses the most extreme 12 - mo
precipitation deficit on record (8) and that both temperature and many drought indicators reached their most extreme historical values for California in July 2014 (7)(Fig. 1 and Figs.
Despite insights into the causes and historical context of
precipitation deficits (8 ⇓ ⇓ — 11), the influence of historical temperature changes
on the probability of individual droughts has — until recently — received less attention (12 ⇓ — 14).
On this week's map, conditions remained status quo in northern portions of the region while short - term
precipitation deficits during the past 30 days led to expansion of areas of Abnormally Dry (D0) in southern Alabama and in northwestern Florida near the Apalachicola River.