HR: 1340h
AN: A43B-1143    [Abstracts]
TI: Statistical analysis of the interannual and decadal climate variability in Western Pacific
AU: Hsieh, P
EM: r95229020@ntu.edu.tw
AU: * Tseng, Y
AF: Pei-Yuan Hsieh, Taiwan National University Atmospheric Science, TAIPEI, 221, Taiwan
AB: The interannual and decadal climate variability in Western Pacific is statistically analyzed using satellite data, ECMWF reanalysis and two IPCC AR4 model results. Regional warming is detected by the long term climate variables trends, such as Sea Surface Temperature (SST) and total column Atmospheric Water Vapor (AWV). Both modeled time series for the last century show an increasing trend as expected, suggesting the possibility of global warming, while some discrepancies are observed among the models and observation. The decadal trends of SST and AWV in most areas are increasing accordantly in models and reanalysis data except Southern Hemisphere, and the increasing in 1990s. The scaling coefficients in Western Pacific in both models show increasing and positive trends. However, the satellite data show a negative coefficient during 1998-2006. Further correlation analysis for these climate variables (SST¡BAWV and Wind Speed) is used to investigate the local characteristics in Western Pacific, where inconsistency exists. The correlation distribution suggests that the AWV not only relates to SST but also are affected by other dynamic processes such as monsoon and El Niño. Significant difference is observed between the models from 30¢XN to 40¢XN in both summer and winter. Empirical Orthogonal Functions (EOF) is then used to analyze the spatial patterns of climate change in Western Pacific. These EOF patterns show that the climate variables are mostly dominant by the interannual and decadal climate variability and dynamics of Pacific.
DE: 1600 GLOBAL CHANGE
DE: 1800 HYDROLOGY
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting