| SSSAJ | Soil Science Society of America Journal | In English | → Serial publications, periodicals → Agricultural sciences |
| SST | Sea Surface Temperature | In English | → Marine research, oceanography → Meteorology, climatology |
| ST | Sciences de la Terre | In French | |
| STD | Stratigraphische Tabelle von Deutschland | In German | → Stratigraphy |
| STERJ | Solar, Terrestrial and Environmental Research Japan | In English | → Serial publications, periodicals → Astronomy |
| StGeo | Studies in Geophysics | In English | → Serial publications, periodicals → Geophysics |
| StGG | Studia Geophysica et Geodaetica | In Latin | → Serial publications, periodicals → Geophysics → Geodesy, cartography |
| STOIC | Study of Tropical Oceans in Coupled Models | In English | → Meteorology, climatology → Marine research, oceanography |
| STOIC | Stratospheric Ozone Intercomparison Campaign | In English | → Meteorology, climatology |
| STOWA | Stichting Toepast Onderzoek Waterbeheer | In Dutch | → Foundations → Hydrology → Environmental technology, water supply, waste management |
| STP | Solar-Terrestrial Physics | In English | → Astronomy |
| STU | Sciences de la Terre et de l'Univers | In French | → Astronomy |
| SUSUSE | Sustainable Use and Conservation of Marine Living Resources | In English | → Marine research, oceanography |
| SVE | Société Volcanologique Européenne (www.sveurop.org) | In French | → Organizations and associations → 55121 |
| SWD | Seismic While Drilling | In English | → Mining |
| TAGU | Transactions of the American Geophysical Union | In English | → Serial publications, periodicals → Geophysics |
| TAS | Total-Alkali-Silica | In English | → Mineralogy → Petrology |
| Tecto | Tectonics | In English | → Serial publications, periodicals → Seismology, earthquakes |
| Tectp | Tectonophysics | In English | → Serial publications, periodicals → Geophysics |
| TFHTAP | Task Force on Hemispheric Transport of Air Pollution | In English | → Meteorology, climatology |
| ThApC | Theoretical and Applied Climatology | In English | → Serial publications, periodicals → Meteorology, climatology |
| TOMS | Total Ozone Mapping Spectrometer | In English | → Meteorology, climatology → Analytical chemistry |
| TPAG | Theory and Practice of Applied Geophysics | In English | → Serial publications, periodicals → Geophysics |
| TraGe | Travaux Géophysiques | In French | → Serial publications, periodicals → Geophysics |
| TrGRC | Geothermal Resources Council Transactions | In English | → Serial publications, periodicals → Energy economics |
| TRMM | Tropical Rainfall Measuring Mission | In English | |
| TSDMO | Tellus Series Dynamic Meteorology and Oceanography | In English | → Serial publications, periodicals → Meteorology, climatology → Marine research, oceanography |
| TSOP | The Society for Organic Petrology (www.tsop.org) | In English | → Organizations and associations → Petrology |
| UARS | Upper Atmosphere Research Satellite | In English | → Meteorology, climatology → Spaceflight engineering, astronautics |
| UGSJR | US Geological Survey Journal Research | In English | → Serial publications, periodicals |
| UNFCCC | 聯合國氣候變化綱要公約 (http://unfccc.int) = UNFCCC | United Nations Framework Convention on Climate Change | In English = CMNUCC | Convenio Marco de las Naciones Unidas sobre Cambio Climático | In Spanish = CCNUCC | Convention-Cadre des Nations Unies sur les Changements Climatiques | In French = CQNUMC | Convenção-Quadro das Nações Unidas sobre Mudança de Clima | In Portuguese = КИК | Рамочная конвенция ООН об изменении климата | In Russian = UNFCCC | 気候変動枠組条約 | In Japanese = UNFCCC | 기후 변화에 관한 국제 연합 기본 협약 | In Korean |
In Chinese | → United Nations → Meteorology, climatology |
| UNFCCC | 気候変動枠組条約 (http://unfccc.int) = CMNUCC, CCNUCC, CQNUMC, КИК (look above) |
In Japanese | → United Nations → Meteorology, climatology |
| UNFCCC | 기후 변화에 관한 국제 연합 기본 협약 (http://unfccc.int) = CMNUCC, CCNUCC, CQNUMC, КИК (look above) |
In Korean | → United Nations → Meteorology, climatology |
| UNFCCC | United Nations Framework Convention on Climate Change (http://unfccc.int) = CMNUCC, CCNUCC, CQNUMC, КИК (look above) |
In English | → United Nations → Meteorology, climatology |
| USAM | Ufficio Generale Spazio Aereo e Meteorologia | In Italian | → Meteorology, climatology → Aeronautics, aircraft |
| USWB | United States Weather Bureau | In English | → Central administration → Meteorology, climatology |
| UWZ | Unwetterzentrale | In German | → Meteorology, climatology |
| VeZPE | Veroffentlichungen des Zentralinstituts Physik der Erde | In German | → Serial publications, periodicals → Geophysics |
| VMIS | Visual Marine Information Systems | In English | → Libraries → Marine research, oceanography |
| VSJ | Volcanological Society of Japan | In English | → Organizations and associations → 55121 |
| WCRP | World Climate Research Programme | In English | → Meteorology, climatology |
| WGGG | Wydział Geoinżynierii, Górnictwa i Geologii | In Polish | |
| WINDII | Wind Imaging Interferometer | In English | → Meteorology, climatology |
| WINDS | Weather Information Network Display System | In English | → Meteorology, climatology |
| WIS | Water Information System | In English | → Hydrology → Environmental technology, water supply, waste management |
| WMO | World Meteriological Organization = MMO | Monda Meteologia Organizo | In Esperanto = OMM | Organisation Météorologique Mondiale | In French |
In English | → International relations → Meteorology, climatology |
| WMO | World Meteorological Organisation | In English | → Organizations and associations → Meteorology, climatology |
| WRD | Water Resource Database | In English | → Libraries → Hydrology → 627 → Environmental technology, water supply, waste management |
| WRI | Water Research Institute | In English | → Hydrology → 627 → Environmental technology, water supply, waste management |
| WWF | World Water Forum | In English | → Hydrology → 626 → Environmental technology, water supply, waste management |
| ZAMG | Zentralanstalt für Meteorologie und Geodynamik | In German | → Meteorology, climatology → Geophysics |
| ZeMet | Zeitschrift fur Meteorologie | In German | → Serial publications, periodicals → Meteorology, climatology |
| ZemVs | Земля и вселенная = ZemVs | Zemlia i Vselennaia | In Russian |
In Russian | → Serial publications, periodicals → Astronomy |
| ZemVs | Zemlia i Vselennaia = (look above) |
In Russian | → Serial publications, periodicals → Astronomy |
| ZERMOS | Zones Exposées à des Risques liés aux Mouvements du Sol et du Sous-Sol | In French | → Regional planning |
| ZFHDG | Zeitschrift der Fachsektion Hydrogeologie in der Deutschen Geologischen Gesellschaft | In German | → Serial publications, periodicals → Hydrology |
| ZGeo | Zeitschrift fur Geophysik | In German | → Serial publications, periodicals → Physics |
| ZGlGl | Zeitschrift fur Gletscherkunde und Glazialgeologie | In German | → Serial publications, periodicals |
| ΕΜΥ | Εθνική Μετεωρολογική Υπηρεσία | In Greek | → Meteorology, climatology |
| КИК | Рамочная конвенция ООН об изменении климата (http://unfccc.int) = UNFCCC, CMNUCC, CCNUCC, CQNUMC (look above) |
In Russian | → United Nations → Meteorology, climatology |