CW3E welcomes Dr. Ryan Spackman

CW3E welcomes Dr. Ryan Spackman

February 12, 2014

CW3E is pleased to welcome Dr. Ryan Spackman! Ryan, an atmospheric chemist, will play a critical role bridging CW3E’s dynamics-focused capabilities with chemistry prowess. As deputy principal investigator for NASA Earth Venture and as a member of the CalWater 2 Core Scientific Steering Group, Ryan brings extensive expertise with airborne science campaign planning, execution and delivery of results. Ryan has a passion for observing the components of the water budget and using this data to evaluate weather and climate models. Graduating with a PhD from Harvard in 2004, Ryan continues to work with NOAA’s Earth System Research Laboratory and Science and Technology Corporation. Ryan’s abilities, enthusiasm and energy are superb additions to the CW3E group.

Likelihood of Drought Ending

Drought Recovery by end of Water Year?

New updates to these figures taking into account February rains, and estimates of rains thru mid March, are available.

Please see updated information including a full set of updated figures on Mike Dettinger’s page and on post from 21 March 2014

February 12, 2014

Drought Recovery Odds

CW3E researcher Mike Dettinger was interested in knowing the likelihood of California recovering from the drought by the end of the current water year on Sept 30, 2014. The method he came up with starts with the precipitation deficit from last water year (Oct 2012 – Sept 2013). Observed precipitation for Oct 2013 thru Jan 2014 was used to determine what has been added to this previous water year deficit, depicted in the above figure by the black squares. Here negative precipitation refers to the carryover deficit from the period extending back to October 2012.

Projections into the future of cumulative precipitation since Oct 2012 were computed by adding observed monthly precipitation from each year in the historical record, 1931-2013, or a total of 83 projections. For each future month (Feb-Sep 2014) the red dots in the above figure represent each of the 83 projections.

The example shown above is for the Sacramento Drainage region (CA Climate Division 2). For this region, only 2 of the 83 projections make it above the 75%-tile level by the end of Sept 2014. None of the projections show the 24-month cumulative precipitation reaching “normal” levels by the end of this water year.

New updates to these figures taking into account February rains, and estimates of rains thru mid March, are available here.

Visit the CW3E Drought Info Page to see projections for all seven of California’s climatic divisions.