1 / 9

Historical Air Pressure Research at KNMI: Insights and Discoveries

Explore research on historical air pressures in the Netherlands, covering dataset construction, quality control, homogenization, and contributions to gridded datasets from 1712 to present. Gain insights into central Netherlands daily air pressure series, Maury dataset, Amsterdam City Water Office records, and ENSEMBLES gridded datasets. Discover notable observations, issues, and developments in atmospheric pressure data analysis.

nita
Download Presentation

Historical Air Pressure Research at KNMI: Insights and Discoveries

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. Current research on historical air-pressures at KNMI(the Netherlands) Theo Brandsma AOPC/OOPC Surface Pressure Working Group -21 October 2005 - Exeter

  2. Contents Contents • Construction of a Central Netherlands daily air pressure series (1712-present) • Quality control of the air pressures in the maritime Maury dataset (1780-1857) • Homogenization of the hourly pressure series of the Amsterdam City Water Office (1824-1963) • Contribution to the ENSEMBLES gridded datasets (1900-present)

  3. N Haarlem * * Amsterdam * Zwanenburg Utrecht * Leiden * * De Bilt * Breda Middelburg * Vlissingen * 0 15 30 km 1. Central Netherlands daily air pressure series (1712 – present) Stations with (sub)daily pressure observatons

  4. De Bilt Utrecht Middelburg Vlissingen Zwanenburg Amsterdam Leiden Haarlem 1. Central Netherlands daily air pressure series (1712 – present) Measurement periods Breda

  5. 1. Central Netherlands daily air pressure series (1712 – present) Time series of 4 contributing stations

  6. 2. Maury data (1780-1857) Maury data set Annual number of observations in CLIWOC, I-COADS Release 1 and the US Maury collection 1750-1870. All values are reduced to number of ship-day observations

  7. 2. Maury data (1780-1857) Problems with the air pressures in the Maury dataset • Time dependent negative bias • Uncertainty about units • Uncertainty about corrections

  8. 3. Amsterdam City Water Office (1824-1963) Hourly weather observation of the Amsterdam City Water Office (1784–1963)

  9. 4. Ensembles gridded datasets (1900 – present) WP5.1 Development of daily high-resolution gridded observational datasets for Europe • Collection of (among others) daily pressure data for Europe • Quality control of the data • Individual time series in ECA&D (European Climate Assessment and Dataset)  http://eca.knmi.nl • Gridded datasets ready in 2007 • http://www.knmi.nl/samenw/ensembles_rt5/WP51.html

More Related