True Polar Wander, Geotesselation and Earth Structure
{'Code': '06030204', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'Michael A. Mayhew', 'PO_EMAI': None, 'PO_PHON': None}
The Earth seeks to minimize its rotational energy while                    conserving angular momentum: the most striking predicted                        consequence of this is true polar wander (TPW).  This proposal is               to develop a systematic understanding of TPW and related                        rotational energy reduction affects, by a theoretical                           consideration of the following: (i) Geotesselation: What                        particular plate tectonic patterns (if any) are characteristic of               the consequences of TPW? Can one, for example, understand the N-S               trend of major subduction zones? (ii) Coupling: Does TPW require                mutual ("locked") rotation of lithosphere and mantle or can these               move separately? Preliminary work suggests that locked TPW is                   mandatory; a more complete analysis is needed. (iii) Is mantle                  circulation affected by earth rotation?  Order-of-magnitude                     calculations suggest that the answer may be yes, at least to a                  modest degree. Linear stability analysis and approximate finite                 amplitude analyses are proposed to bolster or disprove this                     conjecture. (iv) What relationship, it any, is there between TPW                and geomagnetic or paleomagnetic data? (v) Can we understand what               particular circumstances favor or inhibit TPW of the real Earth?
{'FirstName': 'David', 'LastName': 'Stevenson', 'PI_MID_INIT': 'J', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'David J Stevenson', 'EmailAddress': 'djs@gps.caltech.edu', 'NSF_ID': '000172017', 'StartDate': '03/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'California Institute of Technology', 'CityName': 'PASADENA', 'ZipCode': '911250001', 'PhoneNumber': '6263956219', 'StreetAddress': '1200 E CALIFORNIA BLVD', 'StreetAddress2': None, 'CountryName': 'United States', 'StateName': 'California', 'StateCode': 'CA', 'CONGRESSDISTRICT': '28', 'CONGRESS_DISTRICT_ORG': 'CA28', 'ORG_UEI_NUM': 'U2JMKHNS5TG4', 'ORG_LGL_BUS_NAME': 'CALIFORNIA INSTITUTE OF TECHNOLOGY', 'ORG_PRNT_UEI_NUM': None}
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{'Code': '1574', 'Text': 'Geophysics'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1987&All=true', 'xml': '8720730.xml'}