Ocean and Ice Services | Danmarks Meteorologiske Institut
Northern Hemisphere Sea Ice extent
Total sea ice extent on the northern hemisphere during the past years, including climate mean; plus/minus 2 standard deviations. The ice extent values are calculated from the ice type data from the Ocean and Sea Ice, Satellite Application Facility (OSISAF), where areas with ice concentration higher than 15% are classified as ice.
The total area of sea ice is the sum of First Year Ice (FYI), Multi Year Ice (MYI) and the area of ambiguous ice types, from the OSISAF ice type product. The total sea ice extent can differ slightly from other sea ice extent estimates. Possible differences between this sea ice extent estimate and others are most likely caused by differences in algorithms and definitions.
The sea ice extent data from 1979 till today is composed by a Climate Data Record (CDR, OSI-409a), an Interim CDR providing updates with one month delay to the CDR (ICDR, OSI-430) and an operational setup that calculates sea ice extent for the period between the ICDR and today.
You can read technical and validation reports of the products here.
(Natural News) Belief in the concept of catastrophic man-made global warming is now virtually demanded of everyone who wants to be taken seriously and perceived to be a thinking, educated person. Scientists, the mainstream media and public figures like Al Gore have been ramming the concept down our throats for years now, but independent media leaders like Mike Adams, the founder and editor of Natural News, have steadfastly insisted that the data has been manipulated to make the situation appear more dire than it is and to take control of global industry.
Climate change poses less of an immediate threat to the planet than previously thought because scientists got their modelling wrong, a new study has found. New research by British scientists reveals the world is being polluted and warming up less quickly than 10-year-old forecasts predicted, giving countries more time to get a grip on their carbon output. [Emphasis added]
Notice how the article just skips right over the fact that the modeling has been wrong, and uses it as an opportunity to reinforce the concept that countries need to “get a grip on their carbon output.”
The Paris Climate Agreement, which President Trump famously recently bowed out of, is all about keeping global temperatures within 1.5° of where they were before the “evil” manufacturing industry starting spewing carbon dioxide into the air with the birth of the industrial revolution.
Reaching this goal has largely been touted as a virtually impossible feat, only to be accomplished if the whole world pulls together and emissions can be reduced to zero.
Each year, for at least the past decade, headlines have screamed, “Hottest year on record!” making it seem that temperatures are increasing by multiple degrees every year.
The latest report – which was compiled by scientists who are absolute believers in the global warming theory, and are actually directly involved in determining the International Panel on Climate Change (IPCC) carbon budget – clearly indicates that temperatures have only risen by between 0.9° and 1.0° since the start of the Industrial Revolution in England.
So, not only has the temperature not been climbing by a couple of degrees every year for the past decade, but it’s only increased by a degree or less since industries supposedly began changing the climate forever.
While The Telegraph deceptively refers to this time as the “mid-19th-Century,” they actually need to go back a few years.
Prior to the Industrial Revolution, which began in Britain in the late 1700s, manufacturing was often done in people’s homes, using hand tools or basic machines. Industrialization marked a shift to powered, special-purpose machinery, factories and mass production. [Emphasis added]
For those who have been bravely swimming upstream for years and trying to let people know that the whole global warming theory is based on shaky – and possibly fraudulent – science, none of this comes as a surprise.
For those who have faithfully believed everything the media, politicians and others with a vested interest in pushing the global warming theory have told them, this will no doubt come as a shock.
It just reinforces once more that only the independent media can be relied upon to report unbiased scientific fact.
As world leaders, namely in the European Union, attack President Trump for pulling out of the Paris Climate Agreement which would have saddled Americans with billions upon billions of dollars in debt and economic losses, a new bombshell report that analyzed Global Average Surface Temperature (GAST) data produced by NASA, the NOAA and HADLEY proves the President was right on target with his refusal to be a part of the new initiative.
According to the report, which has been peer reviewed by administrators, scientists and researchers from the U.S. Environmental Protection Agency (EPA), The Massachusetts Institute of Technology (M.I.T.), and several of America’s leading universities, the data is completely bunk:
In this research report, the most important surface data adjustment issues are identified and past changes in the previously reported historical data are quantified. It was found that each new version of GAST has nearly always exhibited a steeper warming linear trend over its entire history. And, it was nearly always accomplished by systematically removing the previously existing cyclical temperature pattern. This was true for all three entities providing GAST data measurement, NOAA, NASA and Hadley CRU.
As a result, this research sought to validate the current estimates of GAST using the best available relevant data. This included the best documented and understood data sets from the U.S. and elsewhere as well as global data from satellites that provide far more extensive global coverage and are not contaminated by bad siting and urbanization impacts. Satellite data integrity also benefits from having cross checks with Balloon data.
The conclusive findings of this research are that the three GAST data sets are not a valid representation of reality. In fact, the magnitude of their historical data adjustments, that removed their cyclical temperature patterns, are totally inconsistent with published and credible U.S. and other temperature data. Thus, it is impossible to conclude from the three published GAST data sets that recent years have been the warmest ever –despite current claims of record setting warming.
Finally, since GAST data set validity is a necessary condition for EPA’s GHG/CO2 Endangerment Finding, it too is invalidated by these research findings. (Full Abstract Report)
Of course, this won’t stop global climate normalcy deniers from saying it’s all one big conspiracy to destroy the earth. They’ll naturally argue that data adjustments to the temperatures need to be made for a variety of reasons, which is something the report doesn’t dispute. What it does show, however, is that these “adjustments” always prove to be to the upside. Always warmer, never cooler:
While the notion that some “adjustments” to historical data might need to be made is not challenged, logically it would be expected that such historical temperature data adjustments would sometimes raise these temperatures, and sometimes lower them. This situation would mean that the impact of such adjustments on the temperature trend line slope is uncertain. However, each new version of GAST has nearly always exhibited a steeper warming linear trend over its entire history.