The causes of the recent climatic changes are a hot topic that has elicited heated debates across the world. Environmental scientists have over the years been heavily involved in the research about the changes and the effects to the environment. There has been a common consensus that climate change has a role in the recent weather extremes being witnessed across the world (Gillis, 2012, para.2). Gills goes ahead to discuss differences in opinions and research finding to exactly what causes climate changes. In his article, Gillis reveals that environmental scientists don’t completely agree on whether the human activities today or natural environment variations can be blamed for climate change (Gillis, 2012, para. 9 and 20).
Since early 1980s the world has witnessed increased humans activities that have had drastic impact on the climate. Increased greenhouse gases emission from burning of fossil fuel over the recent years has heavily been a subject in scientific researches on environment. Scientists have believed that these continued human activities and industrial processes have had profound effects on weather extremes, like heavy rains and snowstorms (Gillis, 2012. para. 9).
According to recent scientific papers and reports the percentage of earth temperature stood at less than 1 over the past century. Gillis observes scientific finding and finds out that the earths land surface continues to gain extreme heat which is thought to be as much as 13 percent in recent years (2012, para.1). The Texas heat wave last 2011, the Russian heat wave of 2010 and the European heat wave of 2003 are some of the recent weather extreme that attracted studies to ascertain their exact causes (Gill, 2012, para.2).
Gillis look at James E. Hansen scientific paper that focused on the causes of climate change and finds out that the scientist together with his colleagues attribute the changes to global warming. In the paper, the scientists have found out that during the summer periods of 1951 and 1980, only 0.2 percent of land surface was subjected to extreme heat. On the other hand, the period between 2006 and 2011 has witnessed extreme heat coverage of earth’s surface ranging from 4 to 13 percent. The scientists conclude global warming has soured climate changes in the recent times (2012, para.12).
The report has attracted mixed responses from various environment scientists who sharply differ with James E. Hansen (Gillis, 2012, para.5&6). Some scientists argue that Hansen findings are not backed by persuasive evidence and that the findings were based on solid ground of greater overall likelihood that global warming may cause heat waves (Gillis, 2012, para. 18). Also the findings a of Hansen are rendered debatable by research suggestions by Dr. Hoerling that finds natural climate variability largely contributed to Russian heat wave and Texas draught (Gillis, 2012, para.20).
The effect of global warming on climate changes has been a contested issue by the environmental specialists. The various research findings carried out by the scientists continue to attach increased human activities as greatly impacting on the climate. According to Gillis (2012, para.10), researcher today continue to struggle to answer the question of whether climate changes are human-induced or natural. Regardless of disagreements to what exactly is causing this global climatic changes there is a common consensus that the earth is continuously being covered by anomalous warm events (Gillis, 2012, para.17).
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