Post Author: Swami Gaurangapada Date: 2006-05-05 05:30:47
Global Warming Due to Ugra Karma
Nityananda! Gauranga! Hare Krishna! All of us have experienced the extreme heat of summer this year. Even Navadvipa Dhaam had a record-breaking heat wave. In just one minute we would become drenched with our own perspiration. What is the reason for this?
From an article:
The world is in fact getting warmer--warmer than it's been in at least 400 years. It's Warmer--But Why? "The temperature of the Earth is determined by a balance of the energy entering the Earth-atmosphere system and the energy leaving the system. An energy imbalance imposed on the climate system either externally or by human activities is termed a climate forcing; persistent climate forcings cause the temperature of the Earth to change until an energy balance is restored."
"The main external climate forcings experienced over the last 2,000 years are volcanic eruptions, changes in solar radiation reaching the Earth, and increases in atmospheric greenhouse gases and aerosols due to human activities."
"Volcanic activity has not been anomalous as compared to the last 1,000 years and cannot be used to explain the late 20th century warmth."
"On the basis of satellite-based monitoring, which began in the late 1970s, it is clear that the rapid global warming of the last few decades is not attributable to an increase in the Sun's emission.
"Science Guesses Greenhouse Gases"
Since the beginning of the Industrial Revolution (ca. 1750), the concentrations of greenhouse gases in the atmosphere have increased considerably. . . . Carbon dioxide has increased from about 280 ppm during preindustrial times to current values of around 380 ppm. Methane has more than doubled from preindustrial levels, with more moderate but significant increases of nitrous oxide."
"The radiative forcing due to the increases of these and other long-lived greenhouse gases . . . is significantly larger than any variations or trends in the natural forcings as we understand them over the last 2,000 years."
"Climate model simulations indicate that solar and volcanic forcings together could have produced periods of relative warmth and cold during the preindustrial portion of the last 1,000 years. However, anthropogenic greenhouse gas increases are needed to simulate late 20th century warmth."
"The numerous indications that recent warmth is unprecedented for at least the last 400 years and potentially the last several millennia, in combination with estimates of external climate forcing variations over the same period, support the conclusion that human activities are responsible for much of the recent warming."