1 / 14

OWP: Radiosondes and profilers

OWP: Radiosondes and profilers. Doug Parker, CEH Wallingford, 21 January 2005. Why are the radiosondes needed?. Data assimilation Detailed (sustainable) analysis of weather and climate Data impact studies. Adrian Tompkins (ECMWF).

rosina
Download Presentation

OWP: Radiosondes and profilers

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

  2. Why are the radiosondes needed? • Data assimilation • Detailed (sustainable) analysis of weather and climate • Data impact studies Adrian Tompkins (ECMWF) Is the existing network sufficient to analyse the atmosphere ?

  3. ECMWF data impacts(Tompkins et al 2005) • All data are about equally useful, but • Radiosondes are most important at lower levels (below ~ 600 hPa ~ 16,000 ft) • Radiosonde thermodynamics are more important than all wind data

  4. Why are the radiosondes needed? SOP objectives for radiosonde data • High resolution analysis of weather systems • Coordinated with radar, aircraft … • Diurnal cycle  high frequency • Water and energy budgets • Assimilation into regional models - Regional NWP • Security of aviation

  5. ‘AMMA’ network ASECNA New stations Non-ASECNA Not reporting

  6. Quadrilaterals - fluxes

  7. Sounding frequencies on these networks • EOP/LOP: As a minimum: • March 2005 – October 2007: 1 per day • March 2006 – October 2006: 1 more per day • Total: 1220 per station (~ 20,000 soundings) • Extra: 6350 sondes contributed by AMMA-IP • SOP: Depends on operations – • Could be 8 per day; • Could make use of descent data • Plan for 4600 additional soundings

  8. AMMA RS projects: • AMMA-EU 2 MEu (includes Infrastructure) • France - limited money for upgrade and about 1000 soundings (EOP) • UK - about 880 soundings (EOP/SOP). • US - seeks funds for • SOP soundings (about 1000) • 2 ISS deployments (SOP) • Conakry + sondes (EOP/SOP) • These are relatively small-scale!

  9. Other AMMA RS activities: • Monitoring of data transmission and receipt (data collectors  ECMWF) • Monitoring PILOT network • Archiving high resolution data • Strategy and implementation for long-term support

  10. AMMA Radiosonde Group • Formed mid-2003 • Objectives: • to formulate strategy for radiosonde deployment and • to assist in liaison between data providers and data users http://www.env.leeds.ac.uk/~doug/AMMAsondes/

  11. AMMA-UK radiosondes • Budget incorporated in ‘Global’ AMMA RS budget • Purchasing through ASECNA – lower prices • We are buying priorities in the deployment! • To support the northern region (one station at higher frequency) • To support the BAe146

  12. Tethered balloon system • Carries a turbulence sonde • Ceiling ~ 2 km • To be deployed June to September 2006

  13. 3 sodars • To be deployed in one of the surface flux mesosites (probably around Niamey) • June to September 2006

  14. Sodar specifications • Thickness of layer 10 - 250 m • Lowest measurement height 20 m • Maximum range 500 - 1000 m • Averaging time 1 min to 60 min (typically 10 min) • Accuracy of Horizontal Wind speed 0.1 - 0.3 m/s • Accuracy of vertical Wind speed 0.03 - 0.1 m/s • Accuracy of wind Direction 2 - 3° • Measurement range horizontal - 50 m/s to +50 m/s • Measurement range vertical -10 m/s to +10 m/s • Operational temperature range -35 to 50 °C

More Related