The Meteorological Service of Suriname (MDS) has accepted the invitation by GCOS secretariat to join GRUAN. The Paramaribo station, co-operated by MDS and Royal Meteorological Institute (KNMI) from the Netherlands, is located in the heart of the tropics, and will contribute to GRUAN with regular upper air soundings performed with the Vaisala RS41 as well as ozone soundings. The site also contributes to other scientific networks, such as BSRN, GAW, NDACC, and SHADOZ. Hopefully this will be the first of additional sites in South America, which is a large and climatologically important region that unfortunately still is underrepresented in GRUAN. The Lead Centre is working on configuring the data streams, meaning that soon GRUAN data will be available for this site.