Mathematics – Logic
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3607403s&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 7, CiteID L07403
Mathematics
Logic
15
Hydrology: Water Budgets, Hydrology: Remote Sensing (1640), Hydrology: Hydrological Cycles And Budgets (1218, 1655), Hydrology: Evapotranspiration, Hydrology: Uncertainty Assessment (3275)
Scientific paper
The increasing availability of remote sensing products for all components of the terrestrial water cycle makes it now possible to evaluate the potential of water balance closure purely from remote sensing sources. We take precipitation (P) from the TMPA and CMORPH products, a Penman-Monteith based evapotranspiration (E) estimate derived from NASA Aqua satellite data and terrestrial water storage change (ΔS) from the GRACE satellite. Their combined ability to close the water budget is evaluated over the Mississippi River basin for 2003-5 by estimating streamflow (Q) as a residual of the water budget and comparing to streamflow measurements. We find that Q is greatly overestimated due mainly to the high bias in P, especially in the summer. Removal of systematic biases in P reduces the error significantly. However, uncertainties in the individual budget components due to simplifications in process algorithms and input data error are generally larger than the measured streamflow.
Ferguson Craig R.
McCabe Matthew F.
Sheffield Justin
Troy Tara J.
Wood Eric F.
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