Acronym |
Definition |
| UKMO | United Kingdom Meteorological Office |
| UKV | United Kingdom Variable-resolution weather forecasting system |
| ULF | Ultra Low Frequency |
| ULI | Upper Layer Indication |
| ULJ | Upper- Level Jet |
| ULT | Ultra- Low Temperature |
| ULWRF | Upward Long Wave Radiation Flux |
| UMWL | Upper Mean Water Level |
| UNEP | United Nations Environment Program |
| UNESCO | United Nations Educational, Scientific, and Cultural Organization |
| UNFCC | United Nations Framework Convention on Climate Change |
| UNK | Unknown |
| UNMA | Uganda National Meteorological Authority |
| UOM | Uncertainty of Measrument |
| UOP | UCAR ( University Corporation For Atmospheric Research) Office of Programs |
| UP | Unknown Precipitation |
| UPS | Un-interruptable Power Supply |
| URI | University Research Institute |
| USAF | United States Air Force |
| USCG | United States Coast Guard |
| USDA | United States Department of Agriculture |
| USDOE | United States Department of Education |
| USDOI | United States Department of the Interior |
| USGS | United States Geological Survey |
| USHCN | United States Historical Climatology Network |
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