The assets of CMOD7 and stress-equivalent model winds have been published in peer-reviewed papers: The updated user documentation can be found here:Īlgorithm Theoretical Basis Document for the OSI SAF wind products: If you don't have access to this server (yet), please send a request to and we will provide you with the credentials. The parallel test products (25 and 12.5 km) can be found in these directories at the KNMI FTP server ( ): /scat/ascat_a_osi_cmod7_test (Metop-A) and /scat/ascat_b_osi_cmod7_test (Metop-B). However, the improvements when looking at specific regions, colder and warmer areas, and certain wind speed domains are more distinct. The product improvement is stated as follows in the validation report: looking at the global bulk statistics as obtained from comparisons with ECMWF model winds and buoy winds, the new products show a slight improvement as compared to the old ones. Until the operational products will be upgraded in September (the exact date will be communicated later), we will be providing a parallel data stream on the KNMI FTP server, so that you can evaluate the products. Moreover, the products will contain stress-equivalent ECMWF winds, which are known to better resemble the scatterometer winds. It improves the consistency of the scatterometer retrievals across the instrument swath. CMOD7 was developed to take out incidence-angle dependent effects in CMOD5n. We will upgrade the processing and start using the CMOD7 geophysical model function. The current products are still being produced with the previous CMOD5n geophysical model function and the products contain real 10m ECMWF background model winds as auxiliary data. We are planning to upgrade the near-real time OSI SAF and EARS ASCAT 25 km and 12.5 km winds in September of this year. Please direct all related inquiries to wind product user, Thumb: Rob McEnaney via following message has been forwarded to all registered PO.DAAC users on behalf of the KNMI Scatterometer Team. The southeast, on the other hand, saw some of the least sunshine: Eindhoven and Maastricht recorded just 170 to 175 hours of sunshine throughout the entire month. While the northern- and southernmost regions were the driest in April, coastal areas saw the most sunshine. This marks the first time since 2018 that the Netherlands has seen less than 200 hours of sunshine in April, with 2020 setting a new record with a whopping 287 sunny hours. In addition to being cold and wet, April 2023 was grey and gloomy Weerplaza reports there were just 185 hours of sunshine, compared to the monthly average of 196. Some towns and cities, including Hengelo and Purmerend, recorded over 100 millimetres of precipitation. While Weerplaza explains that, with an average of just 41 millimetres of precipitation, April is normally one of the driest months of the year, last month most of the Netherlands saw between 70 and 100 millimetres of rain. In addition to varied temperatures, April saw a notable amount of rain. This marks the third year in a row that the country has experienced a colder-than-average April.ĭutch weather changeable and unpredictable in 2023 ![]() Overall, the Netherlands recorded an average temperature of 8,8 degrees last month, compared to the April average of 9,9 degrees. Fast forward to April 22, and towns near the eastern border enjoyed temperatures of as high as 21,6 degrees. According to Weerplaza, April 2023 was colder and wetter than average, while at the same time the month brought temperatures below zero and above 20 degrees in some parts of the country.Īt the home of the Dutch Weather Institute (KNMI) in De Blit, temperatures dipped to a low of -2,8 degrees on April 4. Cold temperatures and grey skies in the NetherlandsĪs the Dutch say, april doet wat hij wil (“April does what it wants”), and the weather over the past couple of weeks has certainly proven this statement to be true. In fact, figures reveal that last month was the wettest April the Netherlands has seen in 25 years. While there have been a couple of milder and sunnier days, on the whole, the past several weeks have seen a lot of grey skies and rain clouds. Spring might be here, but you wouldn’t know it from looking at the Dutch weather.
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