Rising temperatures in the XXI century has not stalled – PanamaOn

The latest report by the Intergovernmental Panel on Climate Change (IPCC, for its acronym in English) concluded that global surface temperature has shown “linear warming trend much lower temperatures increase registered the last 15 years (1998-2012) in the previous 60 “.

However, in a study by the National Oceanic and Atmospheric Administration (NOAA) and the US National Center for Environmental Information (NCEI) -both – says the rising temperatures in the twenty-first century have not stuck

“Climate hiatus may be the result of bias in observational networks in temperature,” says Lawrimore
“. Climate hiatus may be the result of bias in observational networks in temperature, “says Jay Lawrimore to Sync, co-author of the study published in Science and head of the research division of NOAA data.” The temperature records have different inconsistencies because of changes that occur in the observation methodologies and tools and to changes in the environment of the weather stations, “the US researcher.

How to measure temperatures, the key

One of the biases of those who speak the authors was in the last century as a way to measure the temperature of the sea surface was changed. “Just before World War II, many boats changed the method used to measure temperature and different temperatures for the same spot on the sea surface depending on the method used were recorded.”

According to the study, another major change that has taken place in recent decades is the growing tendency to use fixed buoys measure sea temperature. Before the mid-70s, the boats were the predominant form for measuring surface temperatures of the sea. “The buoys tend to have a slightly colder than the boats temperature, leading to a bias between the two data sources,” Lawrimore said.

This investigator exonerates the perpetrators of the alleged failure measurements made to the IPCC report noting that short-term fluctuations in the rate of warming are unexpected. “Natural cycles and weather variability have a significant effect on temperature trends in the short term,” said the expert.

The natural cycles are responsible for climate hiatus

Indeed, the natural cycles of speaking the author, as are variations in solar radiation, ocean heat uptake by the oceans or changes in the circulation atmosférica- are responsible for climate hiatus.

The natural cycles and weather variability have a significant effect on trends in short-term temperature
“The conclusion that the trend of global temperature since 2000 is similar to that of the past 50 years no denies the role that these phenomena have on global temperatures, “said Lawrimore who continued, without this kind of influence, probably the rise in global temperatures over the last 15 years would have been higher.

To this study, researchers used data from daily temperatures in the Earth’s surface stations from around the world and a greater amount of sea surface data from ships and buoys in all oceans.

” Recent improvements used in recording the temperature and the addition of two more years of data from the last report of the IPCC (including the record warm year of 2014) have led to these findings, “say the researchers.

The importance of data management

According to the authors, their study shows the importance of data management and encourages continued efforts to improve the accuracy and consistency in the collection systems and temperatures analysis. Lawrimore also underlines the impact that increasing emissions of greenhouse gases is having on the Earth’s climate.

“The reductions in the extent of sea ice in the Arctic, melting permafrost or sea level rise are evidence of ongoing climate change, “said US scientist.