What is negative global angular momentum? & How did it thwart the bull market in natural gas?

(NGF26) (TGF26) (NFF26) (UNG) (BOIL) (KOLD) 

“What is negative global angular momentum? & How did it thwart the bull market in natural gas?”

by Jim Roemer - Meteorologist - Commodity Trading Advisor - Principal, Best Weather Inc. & Climate Predict - Publisher, Weather Wealth Newsletter         

          Edited by Scott Mathews

• Evening Report - December 10, 2025 

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GLAAM stands for Global Atmospheric Angular Momentum in weather forecasting. It is sometimes referred to as GAM and/or GLAM, but they all refer to the same phenomenon. It measures the atmosphere’s rotation, combining Earth’s spin and wind patterns, acting as a crucial index for global circulation and Earth’s rotation, used to understand large-scale climate patterns like ENSO and predict seasonal changes, linking atmospheric shifts to length-of-day variations via numerical models. 

K E Y    C O N C E P T S

• What it is: A measure of the total rotational momentum of the atmosphere around Earth’s axis, calculated by integrating wind speeds and densities across the globe.
• Components: It includes the momentum from Earth’s own rotation (mass term) and the momentum from atmospheric winds (wind term), which vary seasonally.
• Why it Matters:

1. Earth’s Rotation: Fluctuations in GLAAM directly affect the Earth’s rotation speed and thus the length of the day (LOD).
2. Climate Prediction: Strong correlations exist between GLAAM variations and climate phenomena like El Niño-Southern Oscillation (ENSO) and the Madden-Julian Oscillation (MJO).
3. Atmospheric Dynamics: It helps study how mountains, surface friction, and jet streams influence global weather patterns. 

HOW GLAAM IS USED IN FORECASTING:

• Seasonal Forecasts: Negative GLAAM often signals conditions favoring La Niña, potentially leading to cooler, snowier winters in certain regions, while positive GLAAM links to El Niño patterns.
• Predictability: Studies suggest long-range forecasts of GLAAM (up to a year) are possible, offering insights into future climate. 

In essence, GLAAM provides a unified view of atmospheric dynamics, linking winds to Earth’s rotation and helping forecast broader climate trends. 

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Remember when trading commodities, always use risk management, such as stop-loss orders and position sizing, and consider using spreads to isolate the seasonal component of a particular market move. 

Thanks for your interest in Commodity Weather Intelligence !!!

Jim Roemer, Scott Mathews, and the BestWeather Team

Mr. Roemer owns Best Weather Inc., offering weather-related blogs for commodity traders and farmers. He is also a co-founder of Climate Predict, a detailed long-range global weather forecast tool. As one of the first meteorologists to become an NFA-registered Commodity Trading Advisor, he has worked with major hedge funds, Midwest farmers, and individual traders for over 35 years. With a special emphasis on interpreting market psychology, coupled with his short and long-term trend forecasting in grains, softs, and the energy markets, he commands a unique standing among advisors in the commodity risk management industry.