Peter GleickFeb 6, 2023
California's average precipitation hasn't changed over the past 125 years. But it is getting more extreme. The red line shows the variability of precipitation.
That's the signal of #climatechange -- more droughts; more floods.
Show threadGary O
@petergleick Are you sure the average has not changed over that period? Your graph shows the average over the whole period (a single number), not a moving average over time. I believe the moving average is trending lower, especially in the last decade.Here is the LOESS average per decade, through 2022, from https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/statewide/time-series/4/pcp/12/1/1895-2022?base_prd=true&begbaseyear=1901&endbaseyear=2000&trend=true&trend_base=10&begtrendyear=1895&endtrendyear=2022&filter=true&filterType=loess .
Statewide Time Series | Climate at a Glance | National Centers for Environmental Information (NCEI)

Historical and spatial comparisons of local, county, state, regional, national, and global meteorological data to determine trends and patterns

Feb 7, 2023 at 2:15pmWeb