April 2021 - Page 2 of 5 - Climate Impact Company

News

04/25/2021, 9:59 am EDT

Global Atmospheric Angular Momentum To Flip Negative

A strong Madden Julian oscillation shifts east into the equatorial Atlantic/Africa sector and weakens. The heat release pole ward warms the northern latitude mid-atmosphere and the declining latitudinal thermal gradient should slow the jet stream making trough/ridge patterns more likely to occur.

04/25/2021, 9:53 am EDT

The Evaporative Demand Drought Index (EDDI): A Brief Overview and Discussion

Predicting the onset, severity, and duration of drought remains a challenge due to the number of interconnected variables that contribute to drought evolution and recovery (e.g., soil moisture, soil type, vegetation, land-use, topography, antecedent vegetative state/stress levels, and atmospheric circulation). The interactions among these variables span spatial and temporal scales, increasing the complexity of drought prediction.

04/22/2021, 8:19 am EDT

Madden Julian Oscillation Is Influential Now

During northern hemisphere spring La Nina events have a tendency to weaken. The weakening is caused by eastward transition of the Madden Julian oscillation, an area of heavy tropical convection from very warm waters in the West Pacific tropics eastward and erasing the La Nina-biased cool waters of the tropical East Pacific. A MAJOR effort on the part of the MJO takes place the next 2 weeks.

04/19/2021, 2:29 pm EDT

Another Rapidly Intensifying Tropical Cyclone That Passed Very Warm Ocean Water

We’ve seen a plethora of category-5 major tropical cyclones in recent years including Surigae to the east of the Philippines yesterday. In each case, the tropical cyclone intensified rapidly due to passage over warm water plumes.