HR: 10:50h
AN: B32A-03    [Abstracts]
TI: LOICZ: Coastal Change and the Anthropocene
AU: * Talaue-McManus, L
EM: lmcmanus@rsmas.miami.edu
AF: Division of Marine Affairs, Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Miami, FL 33149 United States
AB: Delivery of materials from greatly modified catchments to rapidly changing global coastal basins has been a major focus of the IGBP LOICZ Core Project. Analysis of about 200 nutrient budgets produced significant regression equations to predict inorganic nutrient loads using catchment population density and basin scaled runoff. These relationships were applied to a coastal environmental dataset with global coverage at 0.5-degree resolution to provide initial estimates of nutrient loading at earth system scale. An estimated 74 thousand megamoles of dissolved inorganic phosphorus and 1,350 thousand megamoles of dissolved inorganic nitrogen make up the annual nutrient load reaching the global coastal zone. About 70% of the total load comes from catchments with low to intermediate yields (1 and 3 kmol DIP per sq. km.), indicating the significant role of less polluted systems in global material transport. LOICZ II hopes to expand the nutrient and coastal environmental datasets in coverage and in data density and to incorporate quantitative and qualitative indicators of anthropogenic drivers in its ongoing study of human-coast interactions. In addition, it aims to incorporate remotely sensed data on land use and coastal ocean color with socioeconomic indicators to allow for integrated modelling. Its current science plan wishes to address measures of vulnerability to human and natural perturbations with the hope of informing policy to create sustainable coastal scenarios at local to global scales. This presentation is made on behalf of the LOICZ Project and acknowledges portions derived from Smith et al. (2003).
DE: 4845 Nutrients and nutrient cycling
DE: 6620 Science policy
DE: 1803 Anthropogenic effects
DE: 1615 Biogeochemical processes (4805)
SC: Biogeosciences [B]
MN: 2004 AGU Fall Meeting