The Yellow Sea, bordered by China, North Korea and South Korea, is shown in this Envisat image. Named for the yellowish sand – which originates from the Yellow River – that colours its water, the Yellow Sea is one of the largest shallow areas of continental shelf in the world with an average depth of 44 metres and a maximum depth of 152 metres.
Ecologists and biologists have long recognized that artificial light at night can have adverse effects on the health of humans and terrestrial wildlife, including disrupted sleep patterns, feeding schedules, and reproductive cycles.