North

Summary

North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. North is a noun, adjective, or adverb indicating direction or geography. Etymology The word north is related to the Old High German nord, both descending from the Proto-Indo-European unit *ner-, meaning "left; below" as north is to left when facing the rising sun. Similarly, the other cardinal directions are also related to the sun's position. The Latin word borealis comes from the Greek boreas "north wind, north", which, according to Ovid, was personified as the wind-god Boreas, the father of Calais and Zetes. Septentrionalis is from septentriones, "the seven plow oxen", a name of Ursa Major. The Greek ἀρκτικός (arktikós) is named for the same constellation, and is the source of the English word Arctic. Other languages have other derivations. For example, in Lezgian, kefer can mean both "disbelief" and "north", since to the north of the Musl

Official source

https://en.wikipedia.org/wiki/North

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Types and concentration of microplastics found on remote island beaches during the Race for Water Odyssey

Luiz Felippe De Alencastro, Florian Faure, Clément Levasseur, Frédéric Sciacca

Initiated in 2015 by the Race for Water Foundation, the Race for Water Odyssey is an environmental expedition which sailed across Atlantic, Pacific & Indian Oceans. It has 3 main goals: i) analyse plastic pollution on beaches of remote islands; ii) raise awareness about water plastic pollution; iii) identify solutions to prevent waste from ending in the ocean. Results: High inter-archipelago and inter-beaches variability of micro-plastic concentrations for this worldwide study The North and South Pacific Gyres are the most polluted areas, followed by the North Atlantic Gyre and the Indian Ocean Gyre. Data for the South Atlantic Gyre will come later Hard fragments in large proportion in every stopover, probably mostly due to the degradation of larger plastic debris Pellets also are of great concern, as they were found in every beach, except for Palau  Higher polyethylene proportion for hard fragments (1-5 mm), with significant local variations

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Climate change and Arctic ecosystems: 1. Vegetation changes north of 55 degrees N between the last glacial maximum, mid-Holocene, and present

Jed Oliver Kaplan, Verena Wolf

A unified scheme to assign pollen samples to vegetation types was used to reconstruct vegetation patterns north of 55°N at the last glacial maximum (LGM) and mid-Holocene (6000 years B.P.). The pollen data set assembled for this purpose represents a comprehensive compilation based on the work of many projects and research groups. Five tundra types (cushion forb tundra, graminoid and forb tundra, prostrate dwarf-shrub tundra, erect dwarf-shrub tundra, and low- and high-shrub tundra) were distinguished and mapped on the basis of modern pollen surface samples. The tundra-forest boundary and the distributions of boreal and temperate forest types today were realistically reconstructed. During the mid-Holocene the tundra-forest boundary was north of its present position in some regions, but the pattern of this shift was strongly asymmetrical around the pole, with the largest northward shift in central Siberia (∼200 km), little change in Beringia, and a southward shift in Keewatin and Labrador (∼200 km). Low- and high-shrub tundra extended farther north than today. At the LGM, forests were absent from high latitudes. Graminoid and forb tundra abutted on temperate steppe in northwestern Eurasia while prostrate dwarf-shrub, erect dwarf-shrub, and graminoid and forb tundra formed a mosaic in Beringia. Graminoid and forb tundra is restricted today and does not form a large continuous biome, but the pollen data show that it was far more extensive at the LGM, while low- and high-shrub tundra were greatly reduced, illustrating the potential for climate change to dramatically alter the relative areas occupied by different vegetation types.

2003