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Atmospheric Stability Analysis for Kemayoran, Central Jakarta
Initialization: 2025-07-02 00:00Z
Stability Classification Reference
Based on Environmental Lapse Rate (Γ = -dT/dz) in the surface layer.
- Γ < 0 K/km: Absolutely Stable (Inversion) - Strongest trapping
- 0 to 2 K/km: Extremely Stable - Very strong trapping
- 2 to 5 K/km: Very Stable - Significant trapping
- 5 to 8 K/km: Moderately Stable - Some trapping
- 8 to 9.8 K/km: Weakly Stable - Dispersion becoming favorable
- Γ >= 9.8 K/km: Neutral/Unstable - Good dispersion
Boundary Layer Analysis Reference
1. Mixing Height: The depth of the layer available for pollutant dilution
- < 500 m: Shallow - Very poor dilution, high concentrations likely
- 500-1500 m: Moderate - Dilution is limited
- > 1500 m: Deep - Good dilution potential
2. Low-Level Jet (LLJ): A peak in wind speed in the lower atmosphere
- Can increase surface turbulence and ventilation
- Can also transport pollutants from upwind sources over long distances
Hodograph Analysis Reference
Provides insights into ventilation and severe weather potential
1. Mean Wind (0-1 km AGL): Indicates surface ventilation potential
- < 5 m/s: Poor ventilation, favorable for pollutant trapping
- > 5 m/s: Good ventilation, favorable for dispersion
2. Bulk Shear (0-6 km): Indicates potential for thunderstorm organization
- < 25 knots: Disorganized, single-cell storms are likely
- 25-40 knots: Favorable for organized multicell thunderstorms
- > 40 knots: Favorable for supercells (rotating storms)
Convective Potential (CAPE/CIN) Reference
CAPE (J/kg): 0-1000 (Marginal), 1000-2500 (Moderate), >2500 (Strong)
CIN (J/kg): 0 to -25 (Weak Cap), -25 to -100 (Moderate Cap), < -100 (Strong Cap)