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Specific progress made towards IP:

Oceanic Influence on Global Water/Energy Cycle PI: W. Timothy Liu; Co-I: Xiaosu Xie and Wenqing Tang. Specific progress made towards IP:

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Specific progress made towards IP:

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  1. Oceanic Influence on Global Water/Energy Cycle PI: W. Timothy Liu; Co-I: Xiaosu Xie and Wenqing Tang Specific progress made towards IP: Year 1, 2, & 3: Developed, improved, and validated spacebased moisture transport. Applied to achieve continental water balance over South America. Examined the influence of midlatitude mesoscale ocean processes on large scale high level atmospheric energy and water balances. Year 4 & 5: Water/energy balance over global ocean, ocean influence of Sahel rainfall. Liu, W.T., X. Xie, and K.B. Katsaros, 2009: Oceanic origin of the precipitation jump in the Sahel. Geophys. Res. Lett., in press. Xie,X.,W.T. Liu and B.Tang 2008: Remote Sens. Environ., 112, 1846-1855. Liu, W.T., X. Xie, and P.P. Niiler, 2007: Ocean-atmosphere interaction over Agulhas Extension Meanders. J. Clim., 20(23), 5784-5797. Liu, W. T.,et al., 2006: Spacebased observations of oceanic influence on the annual variation of South American water balance. Geophys. Res. Lett., 33, L08710. Science Issue: Characterization and understanding of oceanic influence of global water/energy cycle was hampered by sparsity of data Approach: Develop and improve methodology of spacebased retrieval of moisture transport, evaporation, and momentum flux over ocean and relate them to global water/energy cycle Satellite-based Data: QuikSCAT, AMSR-E, AIRS, ISCCP, TRMM, MISR, AMSU Other Data: ECMWF,ECCO, Lagrangian drifters, river discharge, Argo Study Period: 2006 to 2009 NEWS linkages: (pull, push, collaborate, external) Product provided to Lin, Scholsser Product used by Hilburn Waliser, Dong, Lin NASA QuikSCAT, TRMM, EOS WCRP GEWEX, CLIVAR, VAMOS, NSF Lessons learned(Multi-satellite, multi-instrument, multi-model integration) What worked: Proposed tasks accomplished What did not work: Suggestions: Oceanic Origin of the Precipitation Jump in the Sahel Contemporary temporal correlation coefficient between precipitation over West African Monsoon region measured by TRMM and the on-shore components (normal to the simplified coast line shown) of moisture transport (Θ) from (a) the Atlantic, and (b) the Gulf of Guinea. (c) and (d) are the same as (a) and (b), except for interannual anomalies. W. Timothy Liu, Updated August 1, 2009

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