Dec
30
2011

The similarity in the trend

The similarity in the trend

for the decrease in force of the Northeasterly winTheTrade still prevails from the Equator to, and is very little changed in force since February; it is strongest on the western side of the BquarIsotherms of Air and Sea. of air and sea isotherms still holds, as also the fact that the sea remains aboutwarmer than the air.The mean temperature of both air and sea in the whole square has increased about o, since February, most in the southeastern part of the square: the greatest increase is between and, where it averages in the air andin the water. It seems worthy of notice that the greatest decrease of pressure has taken place where there was the greatest increase of temperature in air and sea.Current ArrowThe plain arrows show that Westerly currents prevail generally, and are strongest in the southern part of the squarThe dotted arrows show that Southeasterly currents prevail in the northeastern part of the square, where the wind is chiefly from the Northward, and not unfrequently from the Northwestwar There is a large amount of Southerly current betweenand WinThe remarks on wind show that theTrade acquired great force at timeClouds and Weather.Those on clouds and weather lead to very similar conclusions to those derived from January.Natural History.A very large number of stormy petrels nearly a hundred at once were seen in the doldrums betweenand andandGeneral.Red dust is met with to the northward of No landbirds or insects were seen, which may be well accounted for by the winds being so northerly on the eastern side of the squarBest Route across the Equator.In equare , lying to the North of SQUARE , we find the strongest winds to the westward of the Cape Verd Islands in March, and they are decidedly stronger on the western side of squareThe winds near Cape St. Roque in March are favourable for getting to the southward, so that an outwardbounder should keep well to the westward, and might safely cross the line in A homewardbounder should certainly keep to the westwarApril.Isobars and Wind ArrowIn April, pressure has generally increased abouti, and the isobars run more northeasterly and southwesterly in their directioThe greatest increase of .

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