Previous studies have suggested that the presence of sea ice is an important factor in facilitating migration and determining the degree of genetic isolation among contemporary arctic fox populations. Because the extent of sea ice is dependent upon global temperatures, periods of significant cooling would have had a major impact on fox population connectivity and genetic variation. We tested th...

Around 1600 AD the carbon dioxide content of earth’s atmosphere started to rise, even whilst according Milankovitch [1] astronomical theory climate variation it was due fall. On natural earth count is a delayed response and an enhancing feedback on basic cause cycle, intensity June sunshine. If cycle had continued its course, medevial cold period known as little ice age. Human interference with...

In southernmost Greenland near Narsarsuaq, the terminal Narsarsuaq moraine was deposited well outside of a historical Little Ice Age (LIA) moraine adjacent to the modern ice margin. Using 10Be surface exposure dating, we determine Narsarsuaq moraine abandonment at 1.51 0.11 ka. A second set of 10Be ages from a more ice-proximal position shows that ice has been within or at its historical (i.e.,...

The hard and soft tissue remains of a pre-Hispanic population the Gran Canaria Island at six different archaeological localities were studied using 14C dating stable isotope compositions. Radiocarbon indicates island occupation ranging from beginning 7th to mid-14th century. We analyzed oxygen compositions apatite phosphate bones some individuals. meteoric water (δ18Ow) show significant decreas...

Ice-core records show that climate changes in the past have been large, rapid, and synchronous over broad areas extending into low latitudes, with less variability over historical times. These ice-core records come from high mountain glaciers and the polar regions, including small ice caps and the large ice sheets of Greenland and Antarctica.

[1] The Greenland dO ice core record is used as a proxy for Greenland surface air temperatures and to interpret Atlantic Multidecadal Oscillation (AMO) variability. An analysis of annual dO data from six Arctic ice cores (five from Greenland and one from Canada’s Ellesmere Island) suggests a significant AMO spatial and temporal variability within a recent period of 660 years. A dominant AMO per...

Centennial-scale mineral dust peaks in last glacial Greenland ice cores match the timing of lowest Greenland temperatures, yet little is known of equivalent changes in dust-emitting regions, limiting our understanding of dust-climate interaction. Here, we present the most detailed and precise age model for European loess dust deposits to date, based on 125 accelerator mass spectrometry 14C ages...

The Grindelwald Fluctuation (1560–1630) was a cooling phase during the ‘Little Ice Age’ (c.1300–1850). Poor weather contributed to harvest failures, mass starvation and political crises across globe. This paper examines information taken from Bristol chronicles that discuss some of extreme events period. entries support notion featured extraordinarily poor weather, such as great frosts, floods,...

We present two new multi-proxy reconstructions of the extra-tropical Northern Hemisphere (30–90 N) mean temperature: a two-millennia long reconstruction reaching back to 1 AD and a 500-yr long reconstruction reaching back to 1500 AD. The reconstructions are based on compilations of 32 and 91 proxies, respectively, of which only little more than half pass a screening procedure and are included i...