U.S.EPA Office of Policy, Office of Economy and Environment at the National Zoo. Is Climate Changing Where The Wild Things? 1998. www.epa.gov/globawarming/conferences/wildlife.pdf.
Uchijima Z, Ohta S (1996) Climatic change scenarios for Monsoon Asia based on 2xCO2-GCM experiments. In 'Climate Change and Plants in East Asia'. (Ed. Keal Omasa) (Springer-Verlag: Tokyo)
Ulanowicz RE, Ali ML, Vivian A, Heinle DR, Richkus WA, Summers JK (1982) Identifying climatic factors influencing commercial fish and shellfish landings in Maryland. 80 Fisheries Bulletin, 611-619.
UNEP (1992) The Impact of Ozone-layer Depletion. 7 UNEP/GEMS Environment Library, 35.
UNEP (1992) 'Potential impacts of expected climate change on coastal and near-shore environment.' 140
UNEP (1994) Assessment and monitoring of climatic change impacts on mangrove
ecosystems. 154 UNEP Regional Seas Reports and Studies.
UNEP (1999) 'Environmental Effects of Ozone Depletion.' (SMI Distribution Services, enquire@smibooks.com,Herfordshire, United Kingdom)
UNEP-UNESCO. Impact of Expected Climate Change on Mangroves. 1998. http://www.utoronto.ca/env/lib_hold/db1/files/14276_TE.htm.
Unganai L (1996) Historic and future climatic change in Zimbabwe. 6 (2) Climate Research, 137-145.
Union, American Geophysical. Increasing carbon dioxide threatens coral reefs. 2000. EurekaAlert! 1916. http://www.eurekalert.org/releases/agu-icd051600.html.
Union, IUCN World Conservation. Wetlands and Climate Change: Exploring collaboration between the Convention on Wetlands (Ramsar, Iran, 1971) and the UN Framework Convention on Climate Change. 1999. RAMSAR. http://www.ramsar.org/key_unfccc_bkgd.htm.
United States.Congress.Senate.Committee on Agriculture Nutrition and Forestry. (1989) 'The potential impact of global warming on agriculture : hearing before the Committee on Agriculture, Nutrition, and Forestry, United States Senate, One Hundredth Congress, second session ... December 1, 1988.' (U.S. G.P.O. : For sale by the Supt. of Docs. Congressional Sales Office U.S. G.P.O.: Washington)
United States.Congress.Senate.Committee on Commerce Science and Transportation. (1992) 'Global change research : global warming and the biosphere : hearing before the Committee on Commerce, Science, and Transportation, United States Senate, One Hundred Second Congress, second session, April 9, 1992.' (U.S. G.P.O. : For sale by the U.S. G.P.O. Supt. of Docs. Congressional Sales Office: Washington)
United States.Congress.Senate.Committee on Agriculture Nutrition and Forestry. (1999) 'Examining the Kyoto Treaty on Climate Change and its effect on the agricultural economy : hearing before the Committee on Agriculture, Nutrition, and Forestry, United States Senate, One Hundred Fifth Congress, second session ... March 5, 1998.' (U.S. G.P.O. : For sale by the U.S. G.P.O. Supt. of Docs. Congressional Sales Office: Washington)
University, James Cook. Coral Bands and Climate Change. 1998. http://www.gbrmpa.gov.au/~crcreef/4news/Exploring/feat37.html.
Urban FE, Cole JE, Overpeck JT (2000) Influence of mean climate change on climate variability from a 155-year tropical Pacific coral record. 407 (October 26) Nature, 989-993.
Uselman SM, Qualls RG, Thomas RB (1999) A test of a potential short cut in the nitrogen cycle: The role of exudation of symbiotically fixed nitrogen from the roots of a N-fixing tree and the effects of increased atmospheric CO2 and temperature. 210 Plant and Soil, 21-32.
Uselman SM, Qualls RG, Thomas RB (2000) Effects of increased atmospheric CO2, temperature, and soil N availability on root exudation of dissolved organic carbon by a N-fixing tree (Robinia pseudoacacia L.). 222 Plant and Soil, 191-202.
Uvarov BP (1931) Insects and climate. 79 Transactions of the Entomological Society, 1-247.