Toward Construction of an Efficient, Lead-Resolving PIPS Model

• Main Author: Zhang, Jinlun
• Other Authors: WASHINGTON UNIV SEATTLE POLAR SCIENCE CENTER
• Format: Text
• Language: English
• Published: 2002
• Subjects: Snow; Ice and Permafrost; Fluid Mechanics; Mechanics; *ICE MECHANICS; RHEOLOGY; NUMERICAL METHODS AND PROCEDURES; ARCTIC OCEAN; *ICE DYNAMICS; NUMERICAL METHODS; *LEAD BASED RHEOLOGIES; ADI(ALTERNATING DIRECTION IMPLICIT); PIPS(POLAR ICE PREDICTION SYSTEM); Arctic; Arctic Ocean; Teardrop; Ice; permafrost; Sea ice
• Online Access: http://www.dtic.mil/docs/citations/ADA403568; http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA403568

Developed an ADI method to efficiently solve the ice momentum equations associated with a lead-based viscous plastic rheology. Implemented the ADI solver in a dynamic thermodynamic sea-ice model in spherical coordinates. Also developed mathematical formulations for viscous plastic rheologies using teardrop and parabolic lens yield curves with or without incorporating tensile stress. These rheologies, together with the elliptical yield curve, have been numerically implemented in a 10 km. high-resolution 12 category thickness and enthalpy distribution (TED) model for the Arctic Ocean. Did three model runs with these 3 yield curves, driven by atmospheric forcing from 1987-1999. Conducted model runs with a corresponding 40 km resolution model using 4 plastic yield curves. Incorporated an optimal interpolation data assimilation procedure in a TED sea-ice model. Investigated effects of assimilating buoy drift data and satellite ice motion data on modeling Arctic sea ice. --Original contains color plates: All DTIC reproductions will be in black and white.