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Peep, Squeal and Claim: Complex Territorial Call Emission Across Social Contexts in a Neotropical Torrent Frog

Ethology, Volume 132, Issue 8, Page 565-577, August 2026.
Males of Hylodes perere emit territorial calls ranging from simple to complex combinations of peep (A) and squeal (B) notes, often accompanied by visual signals. Because note A resembles advertisement call notes whereas note B resembles fighting calls, variations in territorial calls may represent a behavioral continuum conveying different levels of ...
Rubens A. F. Turin, Renato C. Nali
wiley +1 more source

Trends and Sensitivities of Low‐Cloud Cover and Top Height From Spaceborne Lidar Observations

Geophysical Research Letters, Volume 53, Issue 14, 28 July 2026.
Abstract Low clouds effectively cool the Earth by reflecting incoming solar radiation. Detecting low‐level clouds with passive satellite sensors can be ambiguous, whereas active remote sensing instruments directly measure cloud‐top height. Here, we analyze 14 years of spaceborne lidar observations to assess trends in the occurrence of low‐level clouds ...
M. Tesche, H. Andersen, G. Choudhury, T. Goren +3 more
wiley +1 more source

Reflections of global cities and on the connections between them

Nordia Geographical Publications, 2008
The modern society beacons a visible trace at the night sky. The sources of these blips are growing into massive entities. Global cities are often explored according to their inner characteristics and their relative importance to the world economy.
Joni Vainikka
doaj

SQM Ageing and Atmospheric Conditions: How Do They Affect the Long-Term Trend of Night Sky Brightness Measurements? [PDF]