A High-Resolution Record of Atmospheric Dust Composition and Variability Since Ad 1650 from a Mount Everest Ice Core

A Mount Everest ice core analyzed at high resolution for major and trace elements (Sr, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, Yb, Lu, Bi, U, Tl, Al, S, Ca, Ti, V, Cr, Mn, Fe, Co) and spanning the period A. D. 1650- 2002 is used to investigate the sources of and variations in atmospheric dust through time. The chemical composition of dust varies seasonally, and peak dust concentrations occur during the winter-spring months. Significant correlations between the Everest dust record and dust observations at stations suggest that the Everest record is representative of regional variations in atmospheric dust loading. Back-trajectory analysis in addition to a significant correlation of Everest dust concentrations and the Total Ozone Mapping Spectrometer (TOMS) aerosol index indicates that the dominant winter sources of dust are the Arabian Peninsula, Thar Desert, and northern Sahara. Factors that contribute to dust generation at the surface include soil moisture and temperature, and the long-range transport of dust aerosols appears to be sensitive to the strength of 500-mb zonal winds. There are periods of high dust concentration throughout the 350-yr Mount Everest dust record; however, there is an increase in these periods since the early 1800s. The record was examined for recent increases in dust emissions associated with anthropogenic activities, but no recent dust variations can be conclusively attributed to anthropogenic inputs of dust.

Über die Rabbinerversammlung des Jahres 1650 : eine historische Abhandlung ; Festschrift ... J. J. Oettinger zu seinem 25 jährigen Amtsjubiläum ...

Selig Cassel

Die Leiden und Verfolgungen der Juden und ihre Beschützer in chronologischer Reihenfolge : von Pharao 1650 vor Christi Geburt bis zur Gegenwart

von H. E.

Die Leiden und Verfolgungen der Juden und ihre Beschützer in chronologischer Reihenfolge : von Pharao 1650 vor Christi Geburt bis zur Gegenwart

von H. E.

Orígen de los americanos : esto es Esperanza de Israel. Reimpresion à plana y renglon del libro de Menasseh ben Israel ... sobre el orígen de los americanos publicado en Amsterdam 5410 (1650)

Menasseh Ben Israel. Con un preámblo, una noticia bibliográfica de las principales obras que sobre los origenes, historia y conquistas de América y Asia se han impreso, y el retrato y la biografía del autor, por Santiago Pérez Junquera

Minor inheritance inhibits the calibration of the 10Be production rate from the AD 1717 Val Ferret rock avalanche, European Alps

To calibrate the in situ 10Be production rate, we collected surface samples from nine large granitic boulders within the deposits of a rock avalanche that occurred in AD 1717 in the upper Ferret Valley, Mont Blanc Massif, Italy. The 10Be concentrations were extremely low and successfully measured within 10% analytical uncertainty or less. The concentrations vary from 4829 ± 448 to 5917 ± 476 at g−1. Using the historical age exposure time, we calculated the local and sea level-high latitude (i.e. ≥60°) cosmogenic 10Be spallogenic production rates. Depending on the scaling schemes, these vary between 4.60 ± 0.38 and 5.26 ± 0.43 at g−1 a−1. Although they correlate well with global values, our production rates are clearly higher than those from more recent calibration sites. We conclude that our 10Be production rate is a mean and an upper bound for production rates in the Massif region over the past 300 years. This rate is probably influenced by inheritance and will yield inaccurate (e.g. too young) exposure ages when applied to surface-exposure studies in the area. Other independently dated rock-avalanche deposits in the region that are approximately 103 years old could be considered as possible calibration sites.

Das Doktordiplom des Frankfurter Judenarztes Isaak Hellen (1650)

Moritz Stern

Das große jüdische Concilium in der Ebene von Ageda in Ungarn : im Jahre 1650

Ignaz Jeitteles

Ueber ein Herbarium prussicum des Georg Andreas Helwing aus dem Jahre 1717

von Dr. Conwentz