Accumulation rate and stable oxygen isotope ratios of the ice cores from the North Greenland Traverse

We present for the first time all 12 d18O records obtained from ice cores drilled in the framework of the North Greenland Traverse (NGT) between 1993 and 1995 in northern Greenland. The cores cover an area of 680 km × 317 km, 10 % of the Greenland ice sheet. Depending on core length (100-175 m) and accumulation rate (90-200 kg/m**2/a) the single records reflect an isotope-temperature history over the last 500-1100 years. Lowest d18O mean values occur north of the summit and east of the main divide as a consequence of Greenland's topography. In general, ice cores drilled on the main ice divide show different results than those drilled east of the main ice divide that might be influenced by secondary regional moisture sources. A stack of all NGT records and the NGRIP record is presented with improved signal-to-noise ratio. Compared to single records, this stack represents the mean d18O signal for northern Greenland that is interpreted as proxy for temperature. Our northern Greenland d18O stack indicates distinctly enriched d18O values during medieval times, about AD 1420 ± 20 and from AD 1870 onwards. The period between AD 1420 and AD 1850 has depleted d18O values compared to the average for the entire millennium and represents the Little Ice Age. The d18O values of the 20th century are comparable to the medieval period but are lower than that about AD 1420.

Itinéraire portatif d'un arrondissement de 30 à 40 lieues de la ville de Paris : divisé en trois parties : ouvrage utile à toutes les personnes qui desirent avoir une connoissance exacte des endroits, des grandes routes & chemins de traverse renfermés dans le même arrondissement, enrichi d'un plan de Paris & de deux cartes pour l'intelligence dudit ouvrage /

Errata: p. [3] at end.

Summer resorts on Little Traverse Bay.

Mode of access: Internet.

Resources of Sisseton Reservation Area, (Lake Traverse Reservation) : history - present - potential.

"May 1969."

Traverse tables; computed to 4 places decimals for every ́of angle up to 100 distance. For the use of surveyors and engineers.

Mode of access: Internet.

Voyage dans les quatre principales îles des mers d'Afrique : fait par ordre du gouvernement, pendant les années neuf et dix de la République (1801 et 1802), avec l'histoire de la traversée du capitaine Baudin jusqu'au Port-Louis de l'île Maurice /

Plates numbered I-LVI; XIV AND XXIII repeated in numbering.

Extraits de lettres écrites pendant la traversée de Spithead à Sainte-Hélène, et durant quelques mois de séjour dans cette isle.

Mode of access: Internet.