An ocean current that crosses from east to west between the equator and the Tropic of Cancer. In the Indian Ocean, it is only present during the cold season in the Northern Hemisphere, but in the North Pacific and North Atlantic, it exists all year round. The North Equatorial Current in the Pacific Ocean originates near the confluence of the California Current from the north and the Equatorial Countercurrent from the south off the coast of Central America, flows west between 7 and 23 degrees north latitude, and splits into north and south currents east of the Philippines, connecting with the Equatorial Countercurrent and the Kuroshio Current, respectively. The current speed at the sea surface is 0.5 to 2 knots, and the volume of flow is greater in the west, reaching 50 to 70 million cubic meters per second around 140 degrees east longitude. [Koichi Nagasaka] [Reference] | |Source: Shogakukan Encyclopedia Nipponica About Encyclopedia Nipponica Information | Legend |
赤道近海から北回帰線付近の間を東から西に横切る海流。インド洋では北半球の寒候期に限られるが、北太平洋や北大西洋では通年にわたり存在する。太平洋の北赤道海流は、中央アメリカ沖で北からのカリフォルニア海流と南からの赤道反流が合流する付近に端を発し、北緯7~23度付近の間を西に向かい、フィリピン東方で南北に分かれ、それぞれ赤道反流と黒潮につながっている。海面での流速は0.5~2ノット、流量は西のほうほど大きく、東経140度付近では毎秒5000万~7000万立方メートルに達している。 [長坂昂一] [参照項目] | |出典 小学館 日本大百科全書(ニッポニカ)日本大百科全書(ニッポニカ)について 情報 | 凡例 |
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