GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, 2001 1.

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Presentation transcript:

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17,

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17,

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, GPM Validation Strategy Tropical Continental Confidence sanity checks GPM Satellite Data Streams Continuous Synthesis ∑ error variances ∑ precip trends Calibration Mid-Lat Continental Tropical Oceanic Extratropical Baroclinic High Latitude Snow Research Quality Data Algorithm Improvements Research ∑ cloud macrophysics ∑ cloud microphysics ∑ cloud-radiation modeling FC Data Supersite Products II. GPM Supersites  Basic Rainfall Validation hi-lo res guage/disdrometer networks polarametric Radar system  Accurate Physical Validation scientists & technicians staff data acquisition & computer facility meteorological sensor system upfacing multifreq radiometer system D o /DSD variability/vertical structure convective/stratiform partitioning III. GPM Field Campaigns  GPM Supersites cloud/ precip/radiation/dynamics processes  GPM Alg Problem/Bias Regions targeted to specific problems I. Basic Rainfall Validation  ∑  Raingauges/Radars new/existing gauge networks new/existing radar networks

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Focused Field Campaigns Meteorology-Microphysics Aircraft GPM Core Satellite Radar/Radiometer Prototype Instruments Piloted UAVs 150 km Retrieval Error Synthesis Algorithm Improvement Guidance Validation Research Triple Gage Site (3 economy scientific gages) Single Disdrometer/ Triple Gage Site (1 high quality-Large Aperature/ 2 economy scientific gages) 150 km 100-Site Lo-Res Domain Centered on Pol-Radar 5 km 100-Site Hi-Res Domain Center-Displaced with Uplooking Radiometer/Radar System [10.7,19,22,35,85,157 GHz/14,35,95 GHz] Data Acquisition- Analysis Facility DELIVERY Legend Polarametric Radar Uplooking Radiometer/Radar Meteorological Tower Supersite Template Site Scientist (3) Technician (3)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, A Global Satellite Precipitation Observing System Would Be Optimized with Additional Global Measurements Central to Understanding & Predicting Global Water Cycle

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Synergy with Lighting Missions (D. Boccippio, H. Christian, S. Goodman; GHCC)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Water Vapor Transport Determined by Global Potential Function of E – P where P is Provided by TRMM Synergy with WV & Winds Missions (B.J. Sohn, E.A. Smith; SNU, GSFC)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Synergy with Global Wind Lidar Missions Wind Uncertainties in Global Model Analyses NCEP-ECMWF Wind Speed Differences (R. Atlas; NASA/GSFC) January mean Hadley circulation (left) for calculated as average of GSFC/DAO & NCEP reanalyses. Vertical motion contoured in  bars s -1. Vector differences (right) between two analyses given with percent differences in vertical motion. Uncertainties exceeding 20% are common. Simulated DWL LOS Winds (D. Emmitt; SWA)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Understanding Impact of Soil Moisture on Flood/Drought Prediction, Weather Forecasting, & Agriculture is Scientifically Compelling Global soil moisture observation using microwave radiometer Synergy with Soil Moisture Missions

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Schematic diagram illustrating Lukas-Lindstrom 'barrier layer' theory. During strong wind burst, surface mixed layer extends down to top of thermocline. Following wind burst, additional buoyancy from precipitation and strong surface heating acts to form relatively warm and fresh thin surface mixed layer. Below thin layer is strong halocline, which effectively decouples surface forcing from deeper water. Further heating is trapped for vertical mixing above barrier formed by halocline. From: Anderson, S. P., R. A. Weller, and R. B. Lukas, 1996: Surface buoyancy forcing and the mixed layer of the western Pacific warm pool: Observations and 1D model results. J. Climate, 9, Synergy with Ocean Salinity Missions

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Synergy with Cold Seasons Hydrology Missions (S. Running; Univ. Montana)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Use of Distributed Runoff Fields Generated from Observed Discharge to Assess Precipitation Bias Precipitation estimates from Global Precipitation Climatology Project (GPCP) can be assessed using integrated system of observed & modeled runoff estimates (Fekete, Vorosmarty, Grabs; WMO Report #22). Comparisons highlight spatial patterns of potential bias in precipitation estimates & therefore water budget closure. An integrated ground-based monitoring system for discharge & co-incident runoff fields would be of substantial value to integrity of GPM rain retrievals. Synergy with Major River Runoff Missions (C. Vorosmarty; UNH)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Global Mean Annual Runoff Ratio ( ) Synergy with Continental Runoff Missions (E.F. Wood; Princeton)

GPM GPM Planning Workshop (Instructions): Eric A. Smith May 17, Lake Chad Aral Sea Amazon River Synergy with Hydrologic Altimetry Missions Relative River/Lake Level Change