THE FUTURE ‘WARM LIA’ SCENARIO ACROSS THE AMERICAN SOUTHWEST

2017 ◽  
Author(s):  
Julie Loisel ◽  
◽  
Glen M. MacDonald ◽  
Marcus Thomson
Author(s):  
Julian Lim

In 1883, the San Antonio Daily Express published a series of letters written by special correspondent Hans Mickle. The reporter was exploring parts of the new transcontinental railway that ran across the American Southwest, connecting San Francisco and Los Angeles to New Orleans. As he followed the route that raced westward across Texas from San Antonio, he entertained his readers with descriptions of the foreign landscape and the assorted passengers that caught his attention, including the “Chinamen” who filled the cars on their way back west, he presumed, to San Francisco and China. Mostly, however, Mickle wrote about El Paso, which according to his report was “the most western point in Texas, and is Texan only in name, as, in almost everything else, it has few Texan characteristics.” If not characteristically Texan, though, El Paso came to represent something even grander for Mickle, for at the “extreme head of an extensive valley,” in a pass flanked by high and rugged mountains, he found himself standing in what he called the “Future Immense.”...


2020 ◽  
Author(s):  
Monica Ionita-Scholz ◽  
Mihai Dima ◽  
Viorica Nagavciuc ◽  
Patrick Scholz ◽  
Gerrit Lohmann

<p>Mega-droughts are notable manifestations of the American Southwest, but not so much of the European climate. By using long-term hydrological and meteorological observations, as well as paleoclimate reconstructions, we show that central Europe has experienced much longer and severe droughts during the Spörer Minimum (~AD 1400 – 1500) and Dalton Minimum (~AD 1770 – 1850), than the ones observed during the 21<sup>st</sup> century. These two mega-droughts appear to be linked with a weak state of the Atlantic Meridional Overturning Circulation (AMOC) and enhanced winter atmospheric blocking activity over the British islands and western part of Europe, associated with reduced solar forcing and explosive volcanism. In contrast with these mega-droughts, present-day extreme dry events in Europe are mainly related to high temperature levels. Since numerical simulations indicate a future slowdown of AMOC in a globally warming world, we argue that these two forcing factors for droughts, weakening ocean circulation and temperature increase, could interfere constructively in the future. Consequently, this will potentially lead to an increase in the frequency of hot and dry summers, especially over the central part of Europe, posing enormous challenges to governments and society.</p>


1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).


1978 ◽  
Vol 48 ◽  
pp. 387-388
Author(s):  
A. R. Klemola
Keyword(s):  

Second-epoch photographs have now been obtained for nearly 850 of the 1246 fields of the proper motion program with centers at declination -20° and northwards. For the sky at 0° and northward only 130 fields remain to be taken in the next year or two. The 270 southern fields with centers at -5° to -20° remain for the future.


Author(s):  
Godfrey C. Hoskins ◽  
Betty B. Hoskins

Metaphase chromosomes from human and mouse cells in vitro are isolated by micrurgy, fixed, and placed on grids for electron microscopy. Interpretations of electron micrographs by current methods indicate the following structural features.Chromosomal spindle fibrils about 200Å thick form fascicles about 600Å thick, wrapped by dense spiraling fibrils (DSF) less than 100Å thick as they near the kinomere. Such a fascicle joins the future daughter kinomere of each metaphase chromatid with those of adjacent non-homologous chromatids to either side. Thus, four fascicles (SF, 1-4) attach to each metaphase kinomere (K). It is thought that fascicles extend from the kinomere poleward, fray out to let chromosomal fibrils act as traction fibrils against polar fibrils, then regroup to join the adjacent kinomere.


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