According to the National Snow and Ice Data Center (nsidc.org), ice currently covers 6 million square miles, or one tenth the Land area on Earth, about the area of South America. Floating ice, or Sea Ice, alternately called Pack Ice at the North and South Poles covers 6% of the ocean’s surface (nsidc.org), an area similar to North America. The most important measure of ice is its thickness. The United States Geologic Survey estimates the total ice on Earth weighs 28 million Gigatons(a billion tons). Antarctica and Greenland combined represent 99% of all ice on Earth. The remaining one per cent is in glaciers, ice sheets and sea ice. Antarctica can exceed 3 miles in thickness and Greenland one mile. If they were to melt sea level would indeed rise over 200 feet, but not even the most radical alarmists suggest that possibility arising due to the use of fossil fuels. However the ice that flows off of the Antarctic and Greenland called shelf ice represents only half a percent of all the Earth’s ice and which if melted would raise sea level only 14 inches, (nsidc.com).
European satellites have detailed the abrupt change in behaviour of one of Greenland’s most important glaciers.
In the 2000s, Jakobshavn Isbrae was the fastest flowing ice stream on the island, travelling at 17km a year.
As it sped to the ocean, its front end also retreated and thinned, dropping in height by as much as 20m year.
But now it’s all change. Jakobshavn is travelling much more slowly, and its trunk has even begun to thicken and lengthen.
By Anthony Watts – Re-Blogged From WUWT
Something this big today would surely fry electrical grids, GPS, and communications. It may be bigger than the Carrington Solar event of 1859.
Scientists have found evidence of a huge blast of radiation from the Sun that hit Earth more than 2,000 years ago. The result has important implications for the present, because solar storms can disrupt modern technology.
The team found evidence in Greenland ice cores that the Earth was bombarded with solar proton particles in 660BC. The event was about 10 times more powerful than any since modern instrumental records began.
By Jim Steele- ReBlogged From WUWT
American folk lore is filled with stories of how Native Americans observed changes in wildlife and foretold future weather changes. I was fascinated by an 1800s story of Native Americans inhabiting regions around Marysville, California who had moved down into the river valleys during drought years. They then moved to higher ground before devastating floods occurred. Did they understand California’s natural climate cycles? Could changes in salmon migrations alert them?
Observing salmon has certainly improved modern climate science. In the 1990s climate scientists struggled to understand why surface temperatures in the northwest sector of the Pacific Ocean had suddenly become cooler while temperatures in the eastern tropical Pacific suddenly warmed. Climate models predicted no such thing. However, fishery biologists noted salmon abundance in Alaska underwent boom and bust cycles lasting 20 to 40 years. When Alaskan salmon populations boomed, their populations from California to Washington busted. Conversely, decades later when Alaskan populations busted, those more southerly populations boomed.
By Willis Eschenbach – Re-Blogged From WUWT
As a result of a tweet by Steve McIntyre, I was made aware of an interesting dataset. This is a look by Vinther et al. at the last ~12,000 years of temperatures on the Greenland ice cap. The dataset is available here.
Figure 1 shows the full length of the data, along with the change in summer insolation at 75°N, the general location of the ice cores used to create the temperature dataset.
By Meteorologist Paul Dorian – Re-Blogged From WUWT
The fast approaching solar minimum and its potential impact on the upcoming winter season
In the long term, the sun is the main driver of all weather and climate and multi-decadal trends in solar activity can have major impacts on oceanic and atmospheric temperatures. In addition, empirical observations have shown that the sun can have important ramifications on weather and climate on shorter time scales including those associated with the average solar cycle of around 11-years. For example, there is evidence that low solar activity during solar minimum years tend to be well-correlated with more frequent “high-latitude blocking” events compared to normal and this type of atmospheric phenomenon can play an important role in the winter season.
By Anthony Watts – Re-Blogged From WUWT
Polar jet circulation changes bring Sahara dust to Arctic, increasing temperatures, melting ice
- A new atmospheric mechanism by which dust travels from the Sahara Desert across the eastern side of the North Atlantic Ocean towards the Arctic has been discovered
- The dust emission was generated by a Saharan cyclone that was triggered by the intrusion of a trough emanating from the polar jet
- The poleward transport of warm dust was caused by a meandering polar jet stream
- Approximately half of the warming in the Arctic is being attributed to increased moisture and heat fluxes transported to the region from lower latitudes