HR: 1330h
AN: G22C-0316    [PDF]
TI: Evaluating Hydrology Estimated From Atmospheric Models And J2
AU: * Johnson, T J
EM: johnson.thomas@usno.navy.mil
AF: US Naval Observatory, Earth Orientation Department, 3450 Massachusetts Avenue NW, Washington, DC 20392-5420 United States
AU: Price, D
EM: djp@maia.usno.navy.mil
AF: US Naval Observatory, Earth Orientation Department, 3450 Massachusetts Avenue NW, Washington, DC 20392-5420 United States
AB: There have been many studies that have used atmospheric and oceanic numerical models to indicate the importance of the atmosphere and oceans in explaining temporal variations in Earth's rotation and gravitational field. These studies were also useful in imposing limits on the role of the continental hydrology in these variations. However, modeling the continental hydrology is extremely difficult and most atmospheric models only give estimates of the soil moistures for the upper 200 cm of soil, thus ignoring the deeper ground water variations. This study uses ground water observations from over 100 US Geological Survey wells to examine the usefulness of atmospheric models in estimating ground water recharge. It also shows the effects of the recent drought conditions in the US on ground water and variations in J2.
DE: 1200 GEODESY AND GRAVITY
DE: 1223 Ocean/Earth/atmosphere interactions (3339)
DE: 1234 Regional and global gravity anomalies and Earth structure
DE: 1620 Climate dynamics (3309)
DE: 1829 Groundwater hydrology
SC: Geodesy [G]
MN: 2003 Fall Meeting