Warm Season Precipitation Analyses from the NAME Event Raingauge Network (NERN) '02-'03 NERN Project Team: NCAR, U. Arizona, U. Sonora, IMADES, ITSON April, 2004 NAME Homepages:

NERN : Shuttleworth, Watts, Jimenez Gochis, Garatuza 100 Event logging, tipping bucket raingages 6 major W-E transects traversing SMO Major improvement in topographic and temporal sampling of precipitation Installed , in operation through spring of 2006 Not available in real-time Contacts:

T1 T6 T5 T4 T3 T2

Precipitation Analyses: Diurnal Cycle of Precipitation Frequency

Precipitation Analyses: Topographic Dependence of the Diurnal Cycle of Wet Day Rain Rate

Diurnal Cycle Averaged Across Transects

Gulf Surges During 2003

Issues related to NAM Precipitation Analyses What are the most appropriate metrics for comparing/ validating precipitation estimates from models and remotely sensed platforms with NERN and other station-based datasets? –Merged datasets –Area integrations (NAME verif. zones, gridded anal., watershed avgs., etc.) –Climatology vs. case studies –Linking precipitation character w/ forcing mechanisms Exactly how does precipitation propagate off of the SMO? –Modeling and NERN evidence that precipitation may move away from SMO to west AND east Extending analyses to encompass larger N. American region

Covariance between NAMS and US?: SW – Cont. US correlations are v. weak and explain v. little of overall σ 2 However, statistically significant evidence for weak anit-correl at lag 0 with transition to pos. correls at (US) lag 4 SW Cont. US

See You This Summer! Nos vemos este verano!

Precipitation Analyses: 2002 Statistics

Precipitation Analyses: Topographic Dependence of the Diurnal Cycle of Wet Day Rain Rate August 2002 – PHASE I Gauges Only

Precipitation Analyses: Elevation Dependence of the Diurnal Power Spectrum Mtn. Stations: Plains Stations: Yecora – 1543m Mazatlan – 2m Pericos – 71m Tecoripa – 402m Ej. El Frijol – 1581m La Hermita – 2716m

Precipitation Analyses: Diurnal Cycle of Precipitation Frequency

Precipitation Analyses: Diurnal Cycle of Intensity