Refractivity During IHOP_2002

Slides:

Advertisements

Similar presentations

Institut für Physik der Atmosphäre Institut für Physik der Atmosphäre High Resolution Airborne DIAL Measurements of Water Vapor and Vertical Humidity Fluxes.

Advertisements

Institut für Physik der Atmosphäre Institut für Physik der Atmosphäre High Resolution Airborne DIAL Measurements of Water Vapour and Vertical Humidity.

Institut für Physik der Atmosphäre Institut für Physik der Atmosphäre High Resolution Airborne DIAL Measurements of Water Vapour and Vertical Humidity.

CalWater2 Gulfstream-IV Measurements Janet Intrieri NOAA/Earth System Research Laboratory April 23, 2014.

Water vapor estimates using simultaneous S and Ka band radar measurements Scott Ellis, Jothiram Vivekanandan NCAR, Boulder CO, USA.

IHOP Science Meeting March 2003 Multi-Platform Observations of a Bore Event on 4 June during IHOP Steven E. Koch Frederic Fabry, Bart Geerts, Tammy.

Bores During IHOP_2002 and Speculation on Nocturnal Convection David B. Parsons, Crystal Pettet and June Wang NCAR/ATD Acknowledgements to Tammy Weckwerth,

21:50 UTC western dryline On the dynamics of drylines Fine-scale vertical structure of drylines during the International H 2 O Project (IHOP) as seen by.

Observed Updraft & Mass Flux in Shallow Cumulus at ARM Southern Great Plains site Preliminary results Yunyan Zhang, Steve Klein & Pavlos Kollias CFMIP/GCSS.

OWP: Radiosondes and profilers Doug Parker, CEH Wallingford, 21 January 2005.

Atmospheric structure from lidar and radar Jens Bösenberg 1.Motivation 2.Layer structure 3.Water vapour profiling 4.Turbulence structure 5.Cloud profiling.

Fine-Scale Observations of a Pre-Convective Convergence Line in the Central Great Plains on 19 June 2002 The Problem Questions: 1. How do mesoscale atmospheric.

The Simultaneous Observation of the Near-Dryline Environment (SONDE- 2008/2009?) Experiment Objectives and Hypotheses New Developments Talking Points Dr.

Unstable Science Question 2 John Hanesiak CEOS, U. Manitoba Unstable Workshop, Edmonton, AB April 18-19, 2007.

Photo by Dave Fratello. Focus To evaluate CAM5/CARMA at 1x1 degree resolution with aircraft observations. - Improve cirrus cloud representation in the.

Evaluation of Dropsonde Humidity and Temperature Sensors using IHOP and DYCOMS-II data Junhong (June) Wang Hal Cole NCAR/ATD Acknowledgement: Kate Young,

Transition of Radar Refractivity to Operational Radars OS&T Briefing, 6 April 2004 Interested parties: NCAR, McGill University, NEXRAD Office of Science.

Application of a High-Pulse-Rate, Low-Pulse-Energy Doppler Lidar for Airborne Pollution Transport Measurement Mike Hardesty 1,4, Sara Tucker 4*,Guy Pearson.

Water Vapor Intercomparison Workshop, Boulder, 2-3 October 2003 Refractivity During IHOP_2002 Tammy M. Weckwerth (NCAR/ATD), Crystalyne R. Pettet (NCAR/ATD),

The fear of the LORD is the beginning of wisdom 陳登舜 ATM NCU Group Meeting REFERENCE : Liu., H., J. Anderson, and Y.-H. Kuo, 2012: Improved analyses.

Slide 1 Impact of GPS-Based Water Vapor Fields on Mesoscale Model Forecasts (5th Symposium on Integrated Observing Systems, Albuquerque, NM) Jonathan L.

Huang et al:MTG-IRS OSSE. EMC seminar, 1/11/ MTG-IRS: An Observing System Simulation Experiment (OSSE) on regional scales Xiang-Yu Huang, Hongli.

IHOP Workshop, Boulder, CO, March, 2003 DLR-DIAL Observations Instrument PI: Gerhard Ehret Instrument operation: Gorazd Poberaj, Andreas Fix, Martin.

Diurnal Variations of Tropical Convection Ohsawa, T., H. Ueda, T. Hayashi, A. Watanabe, and J. Matsumoto, 2001 : Diurnal Variations of Convective Activity.

IHOP Workshop, Toulouse, June 14-18, 2004 MODELING OF A BORE OBSERVED ON JUNE 04 DURING IHOP 2002 Mariusz Pagowski NOAA Research - Forecast Systems Laboratory.

Evaluation of the WVSS-II Sensor Using Co-located In-situ and Remotely Sensed Observations Sarah Bedka, Ralph Petersen, Wayne Feltz, and Erik Olson CIMSS.

IHOP Operations Plan, Chapter 7: Other Special Ground-Based Instrumentation Operation Frédéric Fabry et al. General overview Instrument deployment and.

THE LIFE CYCLE OF A BORE EVENT OVER THE US SOUTHERN GREAT PLAINS DURING IHOP_ th ISTP, Leipzig, Germany, September 2003 C. Flamant 1, S. Koch.

LASE Measurements During IHOP Edward V. Browell, Syed Ismail, Richard A. Ferrare, Susan A Kooi, Anthony Notari, and Carolyn F. Butler NASA Langley Research.

Steve Koch National Severe Storms Laboratory Steve Koch National Severe Storms Laboratory WELCOME to the WoF – HiW Workshop of 2014.

Intercomparisons of Water Vapor Measurements during IHOP_2002 – Radiosonde and Dropsonde Junhong (June) Wang NCAR Atmospheric Technology Division Acknowledgement:

Toulouse IHOP meeting 15 June 2004 Water vapour variability within the growing convective boundary layer of 14 June 2002 with large eddy simulations and.

Airborne Measurement of Horizontal Wind and Moisture Transport Using Co-deployed Doppler and DIAL lidars Mike Hardesty, Alan Brewer, Brandi McCarty, Christoph.

Preliminary LES simulations with Méso-NH to investigate water vapor variability during IHOP_2002 F. Couvreux F. Guichard, V.

This is tes box Multi-scale Analyses of Moisture and Winds during the 3 and 9 June IHOP Low-Level Jet Cases Edward Tollerud, Fernando Caracena, Adrian.

SRL/Reference sonde P. Di Girolamo, D. Whiteman, B. Demoz, J. Wang, K. Beierle, T. Weckwerth The Reference sonde (C34) consists of a Snow White (SW) chilled-mirror.

Airborne/ground-based sensor intercomparison: SRL/LASE Paolo Di Girolamo, Domenico Sabatino, David Whiteman, Belay Demoz, Edward Browell, Richard Ferrare.

October 02, st IHOP_2002 Water Vapor Intercomparison Workshop Status of intercomparisons and the next steps  Characterize moisture measuring techniques.

THE LIFE CYCLE OF A BORE EVENT OVER THE US SOUTHERN GREAT PLAINS DURING IHOP_2002 IHOP Science workshop, Toulouse, June 2004 C. Flamant 1, S. Koch.

IHOP Radiosonde and Dropsonde Data: Highlights and Problems

NOAA Airborne Doppler Update Mike Hardesty, Alan Brewer, Brandi McCarty and Christoph Senff NOAA/ETL and University of Colorado/CIRES Gerhard Ehret, Andreas.

Tammy M. Weckwerth Various Features Influencing Convection Initiation on 12 June 2002 during IHOP_2002* Tammy M. Weckwerth (NCAR) WWRP Symposium on Nowcasting.

Diurnal Variations in Southern Great Plain during IHOP -- data and NCAR/CAM Junhong (June) Wang Dave Parsons, Julie Caron and Jim Hack NCAR ATD and CGD.

Instruments. In Situ In situ instruments measure what is occurring in their immediate proximity. E.g., a thermometer or a wind vane. Remote sensing uses.

Atmospheric profile and precipitation properties derived from radar and radiosondes during RICO Louise Nuijens With thanks to: Bjorn Stevens (UCLA) Margreet.

ISTP 2003 September15-19, Airborne Measurement of Horizontal Wind and Moisture Transport Using Co-deployed Doppler and DIAL lidars Mike Hardesty,

Highlights of Refractivity Observations by Radar (and Some More) during IHOP_2002 Frédéric Fabry and ShinJu Park McGill University Montréal, Canada.

DOE ARM Calibration / Validation Instrumentation Data essentially available in real-time –ARM (Atmospheric Radiation Measurement) –CART (Cloud And Radiation.

Continuous Humidity Profiling using a Wind- Profiler Radar in the UHF band (continued) F. Saïd* (1), B. Campistron (1), D. Bengochea (1), O. Bock (2),

HARGLO-3: Wind Intercomparisons During IHOP

Xiang-Yu Huang, Hongli Wang, Yongsheng Chen

The second AROME-WMED reanalysis of SOP1

The May 24 Shamrock cold front

Overview of The International H2O Project (IHOP_2002)

Overview of USWRP’s International H2O Project (IHOP_2002)

Structure and Dynamics of a Dual Bore Event during IHOP as Revealed by Remote Sensing and Numerical Simulation Steven E. Koch NOAA Research - Forecast.

LASE Measurements of Water Vapor During IHOP

Overview of IHOP-FRA activities including LEANDRE 2 analyses

Preliminary Analyses of S-Pol’s Refractivity Field

Analysis of Refractivity Measurements: Progress and Plans

IHOP Scientific Workshop

K. Davis, K. Craig, A. Desai, S. Kang, B. Reen, and D. Stauffer

Neil Taylor Hydrometeorology and Arctic Lab

Nowcast guidance of afternoon convection initiation for Taiwan

Huaqing Cai NCAR/ASP/ATD Wen-Chau Lee Tammy M. Weckwerth NCAR/ATD

UNSTABLE Science Question 1: ABL Processes

University Corporation for Atmospheric Research

Moisture Variability and Nocturnal Convection

IHOP_2002 AERI INSTRUMENT SUMMARY

Radar Refractivity: validation and application to forecasting

Presentation transcript:

Refractivity During IHOP_2002 Tammy M. Weckwerth (NCAR/ATD), Crystalyne R. Pettet (NCAR/ATD), Frédéric Fabry (McGill University), ShinJu Park (McGill University) and James W. Wilson (NCAR/ATD) Water Vapor Intercomparison Workshop, Boulder, 2-3 October 2003

Intercomparisons Fixed and mobile surface stations AERIBAGO SRL Aircraft

Intercomparisons Mean Bias Stn-Radar = 1.68 N units

Intercomparisons Bias is not related to propagation effects since it’s not diurnally dependent Bias is worse at higher humidities

Surface Station Intercomparisons

Surface Station Intercomparisons Excellent correlations Radar has negative bias

Mobile Mesonet comparisons Correlation = 0.81

Correlation = 0.88

AERIBAGO comparisons Correlation=0.89 Correlation=0.75

SRL comparisons

UWKA comparisons Correlation drop occurs between 358 m leg (0.96) and 673 m leg (0.74) Correlation=0.93

Correlation=0.88

Summary Radar Refractivity may be a proxy for water vapor during the warm season. Radar Refractivity shows excellent correlation with surface station and aircraft refractivity. Radar Refractivity has a low bias vs fixed surface stations Vertical depth represented appears to be lower levels of the ABL (<~300 m?). Horizontal resolution is approximately 4 km (although it sometimes appears better).

Ongoing Work Evaluate accuracy of low-level refractivity retrieval Fixed and mobile mesonets Plan to: Add GPS intercomparisons Plan to: Add DRI MMR intercomparisons Evaluate layer over which refractivity retrieval is representative Aircraft in situ measurements SRL intercomparisons AERI intercomparisons Plan to: Add Sounding & Dropsonde comparisons Plan to: Add horizontal and vertical pointing airborne DIAL Plan to: Add TAOS intercomparisons Possibly add: MIPS profiling radiometer intercomparisons Plan to: Evaluate two more days in detail

Comments and Suggestions?

2 km 11 km Correlation=0.88

S-Pol Refractivity Retrieval Variations in q, T and p Boundary detection Advection Pettet et al., next; Fabry and Park, 1700 dryline dryline cool/moist warm/dry

Refractivity: One Day After Heavy Rainfall Aircraft in-situ data Northern edge of aircraft track Ts=45 deg C, Theta60=307 K, q60 = 8.5 g/kg warm/dry Southern edge of aircraft track Ts=32 deg C, Theta60=306.2 K, q60 = 11 g/kg cool/moist

warm/dry cool/moist

Surface station comparisons Correlation = 0.99

Correlation = 0.92 Correlation = 0.98

Correlation = 0.14

Correlation = 0.68