v0.3.10 (Aug 8, 2025)

🚀 New Features

• Advanced GridFill Module: Major expansion of grid filling capabilities for atmospheric data interpolation:

  • New XArray Interface: Modern skyborn.gridfill.xarray module with automatic coordinate detection
  • Comprehensive Tutorial: Interactive Jupyter notebook demonstrating wind field gap filling techniques
  • Multiple Interpolation Methods: Basic Poisson, high-precision, zonal initialization, and relaxation parameter tuning
  • Physical Validation: Component-wise vs direct speed filling comparison for vector wind fields
  • Quality Assessment: Grid coverage validation and interpolation accuracy metrics

• Rossby Wave Source Analysis: Added comprehensive Rossby wave source calculation capabilities to the windspharm module:

  • New rossbywavesource() method in both standard and xarray interfaces
  • Implements the Sardeshmukh & Hoskins (1988) formulation: S = -ζₐ∇·v - v_χ·∇ζₐ
  • Support for custom truncation levels and Earth's angular velocity parameters
  • CF-compliant metadata for xarray output with proper units and standard names

🔧 Improvements

• Test File Consolidation: Merged duplicate gridfill test files for better maintainability
• Better Grid Handling: Improved spherical harmonic truncation validation for different grid sizes
• Documentation Updates: Enhanced gallery with new Rossby wave source visualization examples

📚 Documentation

• New GridFill Tutorial: Complete interactive demonstration including:

  • Advanced data interpolation techniques with real atmospheric wind data
  • Missing data simulation and quality assessment methodologies
  • Component-wise vs direct approach comparison for vector fields
  • Publication-quality visualizations with integer colorbar formatting
  • Performance analysis and best practices for atmospheric applications

• New Tutorial Notebooks: Added comprehensive examples for:

  • Rossby wave source analysis and visualization
  • Grid filling techniques with atmospheric data
  • Longitude coordinate system transformations

• Enhanced Gallery: Updated with new visualization examples including:

  • windspharm_rossby_wave_source_truncations.png showing truncation effects
  • gridfill_missing_data_overview.png demonstrating gap filling scenarios
  • gridfill_component_vs_direct_comparison.png showing physical constraint preservation
  • Improved figure captions and mathematical formulations
  • Better integration of notebook examples

🧪 Testing

• Expanded Test Coverage: Added comprehensive tests for new Rossby wave source functionality
• Grid Size Validation: Enhanced parameter validation for different grid resolutions
• Cross-interface Testing: Verified consistency between standard and xarray interfaces

Technical Notes

• All existing functionality remains backward compatible
• Enhanced error handling for grid size limitations in spherical harmonic calculations
• Improved memory efficiency for large-scale atmospheric analysis