Contrasting climate change claims

Two very contrasting articles via real Politics on climate change – one claiming “No ice has been lost by Greenland…” and the other “the Greenland ice sheet is melting at its fastest rate in at least 400 years”.

Conrad Black at National Post – Thirty years of climate hysterics being proven wrong over and over again

It is 30 years this past week that Dr. James Hansen, then well into the first of more than three decades as head of the NASA (National Aeronautics and Space Administration)-Goddard Institute for Space Studies, testified to a U.S. Senate committee that the then-current heat wave in Washington was caused by the relationship between “the greenhouse effect and observed warming.” This was the starting gun of a mighty debate about the existence, cause and consequences of global warming.

In his testimony, Hansen described three possible courses for the world’s climate, depending on public policy.

It is the third result that has occurred: unchanged world temperatures since 2000, apart from 2015-2016; then the temperature rose slightly after a heavy El Nino, and then receded again although world carbon emissions have increased moderately.

He gives no evidence of that claim. I’m sure someone else somewhere is saying something similar, but this is from NASA (Goddard Institute for Space Studies) in Global Temperature:

Parallel predictions were made by the United Nations Intergovernmental Panel on Climate Change, which forecast temperature increases twice as great as occurred in the period up to 2000, with accelerating increases in the years since, when the temperature has been flat (with the exception of the one year mentioned). Hansen also predicted exceptional warming in the Southeast and Midwest of the United States, which has not occurred either. As his predictions were battered and defied by the facts,

Hansen reinforced his expressions of ecological gloom and in 2007 predicted that all Greenland’s ice would melt and that ocean levels would rise by seven metres within 100 years.

I can’t find evidence of those claims by Hansen. In Scientific reticence and sea level rise (2007) heb talks only of estimates of possible scenarios based on the known science in 2007. he does say “The nonlinearity of the ice sheet problem makes it impossible to accurately predict the sea level change on a specific date. However, as a physicist, I find it almost
inconceivable that BAU climate change would not yield a sea level change of the order of meters on the century timescale”.

Black:

We have only had 11 years, but no ice has been lost by Greenland, other than what melts every summer and then forms again, and water levels have not moved appreciably.

In contrast from Scientific American: Greenland Is Melting Faster Than at Any Time in the Last 400 Years

study published this week in Geophysical Research Letters finds that melt rates in western Greenland have been accelerating for the last few decades. Melting is now nearly double what it was at the end of the 19th century, the research suggests. And the scientists say a significant increase in summertime temperatures—to the tune of about 1.2 degrees Celsius since the 1870s—is mainly to blame.

Future warming may only continue to enhance the melting, the researchers warn—a major concern when it comes to future sea-level rise.

The researchers used models informed with historical climate data to investigate some of the climatic factors influencing melt rates from one year to the next over the last century. Fluctuations in ocean temperatures and certain atmospheric circulation patterns were shown to have a major influence on year-to-year variations in melt rates since the 1870s.

That’s important to note, because these oceanic and atmospheric patterns may change under the influence of future climate change. Scientists are still debating how they may be affected, but the new findings suggest that a better understanding will be critical to making accurate short-term predictions about melting and sea-level rise.

The need for ongoing scientific research is obviously important. And most of the current science (as opposed to opinion of people like Black) suggests a growing problem with the effects of climate change. The biggest uncertainty is by how much and over what time period.

I got sidetracked addressing some of Black’s claims. The second article from RealClear: Clmate Change Is Our Most Critical National-Security Challenge

Progressive American politicians must embrace the necessity of dramatic action on climate change as a touchstone. So far, Senator Bernie Sanders has done it the most persuasively, campaigning on addressing climate change, health care, racial justice, and economic inequality as his unvaried quartet of issues, invoked in every speech and backed up with serious legislation that shows a willingness to move with real speed. Other party leaders will back him on one bill or another, and scientists and engineers are now runningfor office.

Seriousness on climate change needs to be a qualification, not an afterthought, for anyone who wants to run for president. Because it’s not an environmental issue; it’s the most crucial security question that humans have ever faced.

There’s a major problem with this – Sanders didn’t even make the presidential election, Trump won and is taking the US into the climate change dark ages, and progressive politics in the US is in disarray.

July was hottest recorded month

According to NASA the world keeps heating up, with July 2016 the hottest month since recordings began.

Guardian: July 2016 was world’s hottest month since records began, says Nasa

Last month was the hottest month in recorded history, beating the record set just 12 months before and continuing the long string of monthly records, according to the latest Nasa data.

The past nine months have set temperature records for their respective months and the trend continued this month to make 10 in a row, according to Nasa. July broke the absolute record for hottest month since records began in 1880.

Similar data from the US National Oceanographic and Atmospheric Administration (Noaa) said the past 14 months have broken the temperature record for each month, but it hasn’t released its figures for July yet.

Nasa’s results, which combine sea surface temperature and air temperature on land, showed July 2016 was 0.84C hotter than the 1951 to 1980 average for July, and 0.11C hotter than the previous record set in July 2015.

As the string of hottest months continues, 2016 is “virtually certain” to be the hottest year on record, said David Karoly, a climate scientist from the University of Melbourne.

NASAGISSJuly2016

http://data.giss.nasa.gov/gistemp/graphs/