HR: 1330h
AN: H23B-11 [Abstracts]
TI: Variations of Oceanic Surface Latent Heat Flux from Remote Sensing Data Sets
AU: * Xing, Y
EM: yxing@gmu.edu
AF: Center for Earth Observing and Space Research, School of Computational Sciences,
George Mason University, 4400 University Dr., Fairfax, VA 22030 United States
AU: Chiu, L S
EM: lchiu@gmu.edu
AF: Center for Earth Observing and Space Research, School of Computational Sciences,
George Mason University, 4400 University Dr., Fairfax, VA 22030 United States
AU: Chiu, L S
EM: lchiu@gmu.edu
AF: NASA/GSFC/DAAC, NASA/GSFC, Code 974, Greenbelt, MD 20771 United States
AB:
We examined variations of ocean surface latent heat fluxes from three remote sensing techniques: the Goddard Satellite
Surface Turbulence/Flux version 2 (GSSTF2), the Japanese Ocean Flux Data Set with Use of Remote Sensing Observations
(J-OFURO) and the Hamburg Ocean Atmosphere Parameters and Fluxes from Satellite Data version 2 (HOAPS2). The global average
latent heat fluxes are 102.9 W/m2 and 96.7 W/m2 for GSSTF2 and HOAPS, for the period 1998-1992, respectively. A
global increasing trend has been found for all three data sets for the period 1992-2000, the global averages are 102.7
W/m2, 114.3 W/m2, and 99.6 W/m2, with increases of 9.4%, 13.0% and 7.3%, for GSSTF2, J-OFURO and HOAPS2,
respectively. Empirical Orthogonal Function analyses were performed to examine the nonseasonal variations. The second EOF of
GSSTF2, J-OFURO, and HOAPS2 correspond to an ENSO mode, which correlates with an SOI at 0.74, 0.71 and 0.59, respectively.
The first EOF mode of all the three data sets is characterized by positive anomalies in most areas, especially in the
subtropics, with opposite changes in the equatorial Pacific and maritime continent. The pattern correlations between the
first EOFs of these data sets are 0.50, 0.55, and 0.37 for GSSTF2 and J-OFURO, GSSTF2 and HOAPS2, and J-OFURO and HOAPS2
respectively. If only the area within 30 degree is considered, the corresponding correlations are 0.50, 0.53 and 0.52. This
mode is interpreted as the decadal variation of the Hadley circulation which started in the early nineties. If the first EOF mode is removed, the corresponding increases from linear regression are 2.2%, 7.3%, and close to zero, respectively.
DE: 1719 Hydrology
DE: 1724 Ocean sciences
DE: 1836 Hydrologic budget (1655)
DE: 1878 Water/energy interactions
DE: 3319 General circulation
SC: Hydrology [H]
MN: 2005 Joint Assembly