HR: 0800h
AN: U41A-0804    [Abstracts]
TI: Influence of Climate Change on Extratropical Cyclones and Resulting Effects on Arctic Hydrology
AU: * Finnis, J
EM: joel.finnis@colorado.edu
AF: Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado UCB 216, Boulder, CO 80309
AU: Serreze, M C
EM: serreze@nsidc.org
AF: Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado UCB 216, Boulder, CO 80309
AU: Holland, M M
EM: mholland@cgd.ucar.edu
AF: Climate and Global Dynamics Divison, NCAR, 1850 Table Mesa Dr., Boulder, CO 80305
AU: John, C J
EM: cassano@cires.colorado.edu
AF: Cooperative Institute for Research in Environmental Science (CIRES), University of Colorado UCB 216, Boulder, CO 80309
AB: The freshwater content of the Arctic Ocean is of concern in climate studies, due to its potential influence on deep water formation in the North Atlantic and, as a result, on global thermohaline circulation. The ultimate short-term source of this freshwater is high latitude precipitation, whether it falls directly into the Arctic Ocean, is delivered as runoff via the Arctic river network, or is carried by interbasin ocean currents. Much of this precipitation is produced during the passage of extratropical cyclones, and changes in the intensity, frequency or preferred locations of these events can lead to critical changes in the spatial and temporal distributions of this precipitation. Using output from version three of the Community Climate System Model (CCSM), a coupled general circulation model, the effects of climate change on the character and frequency of these storms will be discussed and related to changes in source terms of the Arctic Ocean freshwater budget.
DE: 0350 Pressure, density, and temperature
DE: 1620 Climate dynamics (0429, 3309)
DE: 1836 Hydrological cycles and budgets (1218, 1655)
SC: Union [U]
MN: Fall Meeting 2005