Showing posts from June, 2016

Climate Feedbacks Start To Kick In More

Droughts and heatwaves are putting vegetation under devastating pressure while also causing wildfires resulting in deforestation and loss of peat at massive scale, contributing to the rapid recent rise in carbon dioxide levels.  It will take a decade before these high recent carbon dioxide emissions will reach their full warming impact. Furthermore, as the world makes progress with the necessary cuts in greenhouse gas emissions, this will also remove aerosols that have until now masked the full wrath of global warming. By implication, without geoengineering occurring over the coming decade, temperatures will keep rising, resulting in further increases in abundance and intensity of droughts and wildfires. Temperatures in the Arctic are rising faster than elsewhere. The image below shows that Arctic waters are now much warmer than in 2015. On June 22, 2016, sea surface near Svalbard was as warm as 13.8°C or 56.9°F (green circle), i.e. 11.6°C or 20.9°F warmer than 1981-2011. High temperat

Ocean Heat Overwhelming North Atlantic

Arctic sea ice extent on June 19, 2016, was at a record low for the time of the year, as the (updated) image below shows. [ image from JAXA ] Not only is Arctic sea ice extent at record low for time of year, the sea ice is also rapidly getting thinner, more fractured, lower in concentration and darker in color.  [ Cracks in sea ice north of Greenland on June 19, 2016, created with Arctic-io image ] On the morning of June 20, 2016, strong methane releases were recorded over the water north of Greenland, as well as east of Greenland, as illustrated by the image below. The image below shows that on the morning of June 20, 2016, mean global methane levels had increased be several parts per billion over a large altitude range, compared to the two previous days. Methane levels at selected altitudes on days in July 2015 and December 2015 are added for reference. [ click on images to enlarge ] Temperatures in the Arctic are rising, as illustrated by the image below, showing that on June 19,

High Temperatures In Arctic

0-2000 m Global Ocean Heat Content Ocean heat content is rising, as illustrated by the image on the right. Where the sea ice declines, this is causing high air temperatures in the Arctic. This year (from January to April 2016) on the Northern Hemisphere, oceans were 0.85°C or 1.53°F warmer than the 20th century average. The image below illustrates that temperatures look set to be high in Siberia for the coming week. The panel on the right shows anomalies at the top end of the scale in Eastern Siberia on June 5, 2016, while the panel on the right shows a forecast for June 12, 2016. These high air temperatures are causing feedbacks that are in turn further speeding up warming in the Arctic. Warmer Rivers Temperatures as high as 28.9°C or 83.9°F were recorded over the Mackenzie River close to the Arctic Ocean on June 13, 2016, at location marked by the green circle. Below is a satellite image of the Mackenzie River delta on June 11, 2016 The image below shows that temperatures as high as