correlation rainfall and oni

Rainfall and El Niño

Guest Post by Willis Eschenbach In a recent post here on WattsUpWithThat, the claim was made that the El Nino influences rainfall. They showed a correlation between various historical proxies and El Nino/La Nina. So I thought I’d take a look at the modern correlation between rainfall and the El Nino. As a measurement of…

scatterplot oceanic evaporation vs temperature

How Thunderstorms Beat The Heat

Guest Post by Willis Eschenbach I got to thinking again about the thunderstorms, and how much heat they remove from the surface by means of evaporation. We have good data on this from the Tropical Rainfall Measuring Mission (TRMM) satellites. Here is the distribution and strength of rainfall, and thus evaporation, around the middle of…

TRMM Monthly Rainfall animation

Tropical Evaporative Cooling

Guest Post by Willis Eschenbach I’ve been looking again into the satellite rainfall measurements from the Tropical Rainfall Measurement Mission (TRMM). I discussed my first look at this rainfall data in a post called Cooling and Warming, Clouds and Thunderstorms. There I showed that the cooling from thunderstorm-driven evaporation is a major heat-regulating mechanism in…

TRMM annual avg rainfall 1997 2015

Cooling and Warming, Clouds and Thunderstorms

Guest Post by Willis Eschenbach Following up on a suggestion made to me by one of my long-time scientific heroes, Dr. Fred Singer, I’ve been looking at the rainfall dataset from the Tropical Rainfall Measuring Mission (TRMM) satellite. Here’s s the TRMM average rainfall data for the entire mission to date: Figure 1. Average annual…