NSF Org:	OCE Division Of Ocean Sciences
Recipient:	OREGON STATE UNIVERSITY
Initial Amendment Date:	September 17, 2009
Latest Amendment Date:	October 5, 2011
Award Number:	0957767
Award Instrument:	Standard Grant
Program Manager:	Barbara Ransom bransom@nsf.gov  (703)292-7792 OCE  Division Of Ocean Sciences GEO  Directorate for Geosciences
Start Date:	October 1, 2009
End Date:	September 30, 2012 (Estimated)
Total Intended Award Amount:	$105,619.00
Total Awarded Amount to Date:	$105,619.00
Funds Obligated to Date:	FY 2009 = $105,619.00
History of Investigator:	Adam Schultz (Principal Investigator) adam@ceoas.oregonstate.edu
Recipient Sponsored Research Office:	Oregon State University 1500 SW JEFFERSON AVE CORVALLIS OR  US  97331-8655 (541)737-4933
Sponsor Congressional District:	04
Primary Place of Performance:	Oregon State University 1500 SW JEFFERSON AVE CORVALLIS OR  US  97331-8655
Primary Place of Performance Congressional District:	04
Unique Entity Identifier (UEI):	MZ4DYXE1SL98
Parent UEI:
NSF Program(s):	Marine Geology and Geophysics
Primary Program Source:	01000910DB NSF RESEARCH & RELATED ACTIVIT
Program Reference Code(s):	0000, 7916, OTHR
Program Element Code(s):	162000
Award Agency Code:	4900
Fund Agency Code:	4900
Assistance Listing Number(s):	47.050

ABSTRACT

This research was funded as an Early Concept Grant for Exploratory Research (EAGER). The work focuses on testing whether earth and ocean tides exert an impact on crustal fluid flow in land and seafloor hydrothermal systems. It uses an unconventional, non-Fourier approach in which forcing functions, derived from the gravitational potentials due to the positioning of the Earth, Sun, and Moon, are used as forcing functions, as opposed to the standard Fourier time series approach that is usually used. Modeling software will be developed that builds off the Admiralty Method time-series approach that uses a pseudo-sinusoidal function whose time-varying amplitude and phase are modulated by the relative positions of the planets. The model will be tested with chemical and temperature data from well characterized hydrothermal systems on land (Iceland and Yellowstone) and on the seafloor (sites on the Endeavour segment of the Juan de Fuca Ridge and on the Mid-Atlantic Ridge). Broader impacts of the work include applicability to the geothermal industry and to the NSF-funded Ridge 2000 program which includes the modeling of fluid exchange between the Earth's mantle and ocean via seafloor hydrothermal vents. Data products and software will be made available in publications and on the Internet.

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