1 / 15

Applying a metadata standard for international weather information

Applying a metadata standard for international weather information. Dr Steve Foreman, WMO and Met Office. 8 June 2005. Introduction. Contents. What is WMO? Why a metadata standard for WMO? Issues WMO Core Concepts and extensions. WMO is…. UN Agency (1950) derived from IMO (1873)

eros
Download Presentation

Applying a metadata standard for international weather information

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. Applying a metadata standard for international weather information Dr Steve Foreman, WMO and Met Office. 8 June 2005

  2. Introduction

  3. Contents • What is WMO? • Why a metadata standard for WMO? • Issues • WMO Core • Concepts and extensions

  4. WMO is…. • UN Agency (1950) • derived from IMO (1873) • Co-ordinate meteorology • weather • observations • forecasts • climate change • hydrology • disaster mitigation • 187 Members

  5. WMO - Weather Forecasting • Rapid exchange • Observations • Forecasts • Exchange formats • Brevity important • Unambiguous • language-independent • character • binary • “Obscure”

  6. WMO - climate • Observations • Model simulations • Interdisciplinary • meteorology • oceanography • biology • land • marine • hydrology • chemistry • ………..

  7. Why metadata? • Expanding science • data not known • data not exploited • observations repeated • Exploitation • decision systems • non-experts • Need to: • discover • exchange SMFW01 NWBB 270000 AAXX 27004 91753 32481 51008 10331 20259 40078 58017 83202 333 20263 59018 83816 84078= 91754 01581 51812 10287 20245 40092 58017 60034 70182 85200 333 20256 59016 60017 85820= NNNN

  8. Issues for meteorology • MD_TopicCategoryCode • Climatology/Meteorology/Atmosphere • The whole of our discipline! • Subdivision would help

  9. Issues - time • Forecasts • Observation time (span) • Time forecast run • Validity time of forecast • Accumulation interval for, eg, rainfall • etc • Climate • use 360 day year

  10. Irregular grids Different co-ordinates ECMWF store: Spherical Harmonics (SH) Gaussian Grid (GG) Latitude/Longitude (LL) Coastal ocean model Issues - space http://oceanworld.tamu.edu/resources/ocng_textbook/chapter15/Images/Fig15-3.htm German weather model (http://www.dwd.de)

  11. L R R L Issues - space • Physical co-ordinates • One parameter (eg “potential vorticity”) on a constant value of another (eg “potential temperature”).

  12. Issues - continua • Feature or coverage – or both? • Coverage obvious candidate, but • 3 dimensional fields • restrictive definition • Prefer Feature Catalogue • flexible grids • one variable using other as co-ordinate

  13. Issues - implementation • Travelling metadata • many messages containing small packets of data • not practicable to send metadata with each one • probably need to link to unchanging elements

  14. WMO Core • Subset of ISO 19115 • with extensions and interpretations • Testing • climate observations • http://cliware.meteo.ru/wdccatalog/index_en.html • Arctic studies • http://acsys.npolar.no/adis/adis.php#Datasets • automated extraction from routine weather data

  15. Possible extensions • Community sub-topics • Definitions of time • Definitions of space • Replace “coverage” with “features”

More Related