. Compendium of meteorology. Meteorology. 1068 MARINE METEOROLOGY condensation. When the quantity is negative, it indi- cates that an excess of latent energy is being locally transformed into sensible heat. However, since the author has already computed the seasonal and annual differences between evaporation and precipitation over the oceans [10], the difference (Qa — Qph) can be de- ing that the Northern Hemisphere oceans are not sources of water vapor as surplus latent energy during this season. Albrecht [1] has prepared a rough annual chart, showing {E — P) over the oceans, which is based u
. Compendium of meteorology. Meteorology. 1068 MARINE METEOROLOGY condensation. When the quantity is negative, it indi- cates that an excess of latent energy is being locally transformed into sensible heat. However, since the author has already computed the seasonal and annual differences between evaporation and precipitation over the oceans [10], the difference (Qa — Qph) can be de- ing that the Northern Hemisphere oceans are not sources of water vapor as surplus latent energy during this season. Albrecht [1] has prepared a rough annual chart, showing {E — P) over the oceans, which is based upon a comparison between observed surface salinities and. 160 Eo>t lao Wtit Fig. 5.—The annual values of the surplus of energy available in the latent form of water vapor [Qa — Qph = Lt (E — P)], expressed in calories per square centimeter per day. (The values above can be converted into rough E — P rates by considering that the isometric interval of 50 cal cm^^ day"' is approximately equivalent to an excess rate of evaporation over precipitation of 12 in. yr~'. Negative values indicate a corresponding excess of precipitation over evaporation.) Table VIII. Seasonal Values of Qa — Qph in Different Latitude Zones (in cal cm"" day"') where Qa - Qph = Lt{E- P) North Atlantic North Pacific North latitude zone June-Aug. June-Aug. 0°-10° -62 -57 -126 -64 -34 -70 -99 -78 10°-20° 162 155 95 84 145 141 48 25 20°-30° 133 103 85 114 155 111 75 143 30°-^0° 162 68 36 142 114 19 -10 125 40°-50° 57 -17 -72 24 -3 -66 -96 -28 50°-60° 78 -21 -74 -19 -13 -118 -89 -79 termined very simply through use of these data and by applying the expression Qa - Qvh = {E, - Ps) cal cm-^ day-i, (22) when n = 91 and Lt = 585, and E, and P^ are the sea- sonal values of E and P expressed in grams per square centimeter per season. The annual values of {Qa — Qph) are given in Fig. 5 and the seasonal ave
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