scholarly journals Evaluation of a Microwave Emissivity Module for Desert Regions With CMEM

2019 ◽  
Vol 6 (9) ◽  
pp. 1787-1795 ◽  
Author(s):  
M. Lange ◽  
P. Rosnay
Keyword(s):  
Microwave Emissivity ◽  
Desert Regions

A desert songbird with no confamilials in the Western Hemisphere (Verdin, Auriparus flaviceps) investigates divergent conspecific songs

The Auk ◽  
2021 ◽  
Author(s):  
Emma I Greig ◽  
Eva Kinnebrew ◽  
Max L Witynski ◽  
Eric C Larsen
Keyword(s):  
North America ◽  
Geographic Variation ◽  
Playback Experiment ◽  
Western Hemisphere ◽  
Monotypic Genus ◽  
Vocal Responses ◽  
Song Variation ◽  
Desert Regions ◽  
Close Relatives

Abstract Most birds that show geographic variation in their songs discriminate between local and foreign songs, which may help them avoid unnecessary conflicts with vagrant individuals or similar-sounding congeners. However, some species respond equally to foreign and local songs, which may be useful if foreign individuals present territorial threats or if there are no sympatric congeners to avoid. Species without sympatric congeners are not commonly tested in playback studies, but they offer an opportunity to see how song variation and recognition unfolds when the pressure to avoid similar congeners is absent. Here, we use Verdins (Auriparus flaviceps), a monotypic genus of songbird with no confamilials in North America, to explore song variation and recognition in a species living without close relatives. We assessed geographic variation in song across the Verdin range and conducted a playback experiment using exemplars from 2 acoustically divergent and geographically distant regions as treatments. We found significant geographic variation in song that mapped well onto ecologically distinct desert regions. We found that Verdins had stronger vocal responses to local-sounding songs, but had equal movement responses to local-sounding and foreign songs. These results are similar to results found in other species without sympatric congeners and provide an example of a species that investigates acoustically divergent conspecific songs, despite recognizing salient differences in those songs.

II.—Some Eroded Hooks in Corsica

1904 ◽  
Vol 1 (8) ◽  
pp. 388-392
Author(s):  
T. G. Bonney
Keyword(s):  
Desert Regions ◽  
Egyptian Desert

As I have recently seen certain cases of the curious hollowing out of rocks in Corsica, described by Mr. F. F. Tuckett (with a note from myself) in the January number of this Magazine, for which Mr. Lake suggested an explanation in the following number, I will add something to that note and intimate why I did not refer to desert regions for an explanation. The case which Mr. Lake mentions (“Das Gesetz der Wüstenbildung,” fig. 7) undoubtedly much resembles Mr. Tuckett's photographs, and so, to some extent, do figs. 16 and 17, more especially the latter. With these I was not then acquainted, perhaps having overlooked the book, because I wrote a notice of “Die Denudation in der Wüste,” when it appeared in 1891, and had formed the opinion that the author was disposed to work his hypothesis for rather more than it would stand. As, however, I knew there would shortly be a chance of my getting a glimpse of the Egyptian desert, I postponed stating why I had not suggested that kind of atmospheric erosion. In this region, however, I saw no more than I already knew, but on our return, owing to an unexpected change of plans, we spent an afternoon and part of the next day in harbour at Ajaccio, when, by a lucky chance, I hit upon some curious instances of erosion, which I think may be worth a brief description.

scholarly journals Monte Carlo simulations of the microwave emissivity of the sea surface

1998 ◽  
Vol 103 (C11) ◽  
pp. 24983-24989 ◽  
Author(s):  
Quanhua Liu ◽  
Clemens Simmer ◽  
Eberhard Ruprecht
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
Sea Surface ◽  
Microwave Emissivity
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